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提交 31b97f78 编写于 作者: B bors
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Auto merge of #55069 - matthewjasper:explain-free-region-liveness, r=nikomatsakis 

[NLL] Use new region infer errors when explaining borrows

Use the new free region infer errors for explaining borrows

This gives at least some explanation for why a borrow is expected to
last for a certain free region. Also:

* Reports E0373: "closure may outlive the current function" with NLL.
* Special cases the case of returning a reference to (or value referencing) a local variable or temporary (E0515).
* Special case assigning a reference to a local variable in a closure to a captured variable. (E0521)

Closes #51026 - `regions-nested-fns-2.rs` isn't changed to that diagnostic, since that would not be the correct error here.
Closes #51169
cc #53882 - The error is (IMO) better now, but it could be better when we trace lifetimes in these error messages.

r? @nikomatsakis cc @pnkfelix
上级 66910ba6 2a3969a3
展开全部 隐藏空白更改
内联 并排
Showing with 1938 addition and 1836 deletion
src/librustc/ich/impls_mir.rs
浏览文件 @ 31b97f78
......@@ -557,6 +557,8 @@ fn hash_stable<W: StableHasherResult>(&self,
impl_stable_hash_for!(enum mir::ConstraintCategory {
Return,
UseAsConst,
UseAsStatic,
TypeAnnotation,
Cast,
ClosureBounds,
......
src/librustc/mir/mod.rs
浏览文件 @ 31b97f78
......@@ -2725,6 +2725,8 @@ pub struct ClosureOutlivesRequirement<'tcx> {
#[derive(Copy, Clone, Debug, Eq, PartialEq, PartialOrd, Ord, Hash, RustcEncodable, RustcDecodable)]
pub enum ConstraintCategory {
Return,
UseAsConst,
UseAsStatic,
TypeAnnotation,
Cast,
......
src/librustc_mir/borrow_check/error_reporting.rs
浏览文件 @ 31b97f78
......@@ -9,19 +9,22 @@
// except according to those terms.
use borrow_check::nll::explain_borrow::BorrowExplanation;
use borrow_check::nll::region_infer::{RegionName, RegionNameSource};
use borrow_check::prefixes::IsPrefixOf;
use borrow_check::WriteKind;
use rustc::hir;
use rustc::hir::def_id::DefId;
use rustc::middle::region::ScopeTree;
use rustc::mir::{
self, AggregateKind, BindingForm, BorrowKind, ClearCrossCrate, Constant, Field, Local,
LocalDecl, LocalKind, Location, Operand, Place, PlaceProjection, ProjectionElem,
Rvalue, Statement, StatementKind, TerminatorKind, VarBindingForm,
self, AggregateKind, BindingForm, BorrowKind, ClearCrossCrate, Constant,
ConstraintCategory, Field, Local, LocalDecl, LocalKind, Location, Operand,
Place, PlaceProjection, ProjectionElem, Rvalue, Statement, StatementKind,
TerminatorKind, VarBindingForm,
};
use rustc::ty::{self, DefIdTree};
use rustc::util::ppaux::with_highlight_region_for_bound_region;
use rustc_data_structures::fx::FxHashSet;
use rustc_data_structures::indexed_vec::Idx;
use rustc_data_structures::sync::Lrc;
use rustc_errors::{Applicability, DiagnosticBuilder};
use syntax_pos::Span;
......@@ -29,7 +32,6 @@
use super::borrow_set::BorrowData;
use super::{Context, MirBorrowckCtxt};
use super::{InitializationRequiringAction, PrefixSet};
use dataflow::drop_flag_effects;
use dataflow::move_paths::indexes::MoveOutIndex;
use dataflow::move_paths::MovePathIndex;
......@@ -581,26 +583,81 @@ pub(super) fn report_borrowed_value_does_not_live_long_enough(
}
}
let err = match &self.describe_place(&borrow.borrowed_place) {
Some(_) if self.is_place_thread_local(root_place) => {
let place_desc = self.describe_place(&borrow.borrowed_place);
let kind_place = kind.filter(|_| place_desc.is_some()).map(|k| (k, place_span.0));
let explanation = self.explain_why_borrow_contains_point(context, &borrow, kind_place);
let err = match (place_desc, explanation) {
(Some(_), _) if self.is_place_thread_local(root_place) => {
self.report_thread_local_value_does_not_live_long_enough(drop_span, borrow_span)
}
Some(name) => self.report_local_value_does_not_live_long_enough(
// If the outlives constraint comes from inside the closure,
// for example:
//
// let x = 0;
// let y = &x;
// Box::new(|| y) as Box<Fn() -> &'static i32>
//
// then just use the normal error. The closure isn't escaping
// and `move` will not help here.
(
Some(ref name),
BorrowExplanation::MustBeValidFor {
category: category @ ConstraintCategory::Return,
from_closure: false,
ref region_name,
span,
..
},
)
| (
Some(ref name),
BorrowExplanation::MustBeValidFor {
category: category @ ConstraintCategory::CallArgument,
from_closure: false,
ref region_name,
span,
..
},
) if borrow_spans.for_closure() => self.report_escaping_closure_capture(
borrow_spans.args_or_use(),
borrow_span,
region_name,
category,
span,
&format!("`{}`", name),
),
(
ref name,
BorrowExplanation::MustBeValidFor {
category: ConstraintCategory::Assignment,
from_closure: false,
region_name: RegionName {
source: RegionNameSource::AnonRegionFromUpvar(upvar_span, ref upvar_name),
..
},
span,
..
},
) => self.report_escaping_data(borrow_span, name, upvar_span, upvar_name, span),
(Some(name), explanation) => self.report_local_value_does_not_live_long_enough(
context,
name,
&name,
&scope_tree,
&borrow,
drop_span,
borrow_spans,
kind.map(|k| (k, place_span.0)),
explanation,
),
None => self.report_temporary_value_does_not_live_long_enough(
(None, explanation) => self.report_temporary_value_does_not_live_long_enough(
context,
&scope_tree,
&borrow,
drop_span,
borrow_spans,
proper_span,
explanation,
),
};
......@@ -615,7 +672,7 @@ fn report_local_value_does_not_live_long_enough(
borrow: &BorrowData<'tcx>,
drop_span: Span,
borrow_spans: UseSpans,
kind_place: Option<(WriteKind, &Place<'tcx>)>,
explanation: BorrowExplanation,
) -> DiagnosticBuilder<'cx> {
debug!(
"report_local_value_does_not_live_long_enough(\
......@@ -625,13 +682,27 @@ fn report_local_value_does_not_live_long_enough(
);
let borrow_span = borrow_spans.var_or_use();
if let BorrowExplanation::MustBeValidFor {
category: ConstraintCategory::Return,
span,
ref opt_place_desc,
from_closure: false,
..
} = explanation {
return self.report_cannot_return_reference_to_local(
borrow,
borrow_span,
span,
opt_place_desc.as_ref(),
);
}
let mut err = self.infcx.tcx.path_does_not_live_long_enough(
borrow_span,
&format!("`{}`", name),
Origin::Mir,
);
let explanation = self.explain_why_borrow_contains_point(context, borrow, kind_place);
if let Some(annotation) = self.annotate_argument_and_return_for_borrow(borrow) {
let region_name = annotation.emit(&mut err);
......@@ -665,7 +736,7 @@ fn report_local_value_does_not_live_long_enough(
);
}
if let BorrowExplanation::MustBeValidFor(..) = explanation {
if let BorrowExplanation::MustBeValidFor { .. } = explanation {
} else {
explanation.add_explanation_to_diagnostic(self.infcx.tcx, self.mir, &mut err, "");
}
......@@ -693,7 +764,7 @@ fn report_local_value_does_not_live_long_enough(
err
}
pub(super) fn report_borrow_conflicts_with_destructor(
fn report_borrow_conflicts_with_destructor(
&mut self,
context: Context,
borrow: &BorrowData<'tcx>,
......@@ -785,6 +856,7 @@ fn report_temporary_value_does_not_live_long_enough(
drop_span: Span,
borrow_spans: UseSpans,
proper_span: Span,
explanation: BorrowExplanation,
) -> DiagnosticBuilder<'cx> {
debug!(
"report_temporary_value_does_not_live_long_enough(\
......@@ -793,6 +865,20 @@ fn report_temporary_value_does_not_live_long_enough(
context, scope_tree, borrow, drop_span, proper_span
);
if let BorrowExplanation::MustBeValidFor {
category: ConstraintCategory::Return,
span,
from_closure: false,
..
} = explanation {
return self.report_cannot_return_reference_to_local(
borrow,
proper_span,
span,
None,
);
}
let tcx = self.infcx.tcx;
let mut err = tcx.temporary_value_borrowed_for_too_long(proper_span, Origin::Mir);
err.span_label(
......@@ -804,7 +890,6 @@ fn report_temporary_value_does_not_live_long_enough(
"temporary value is freed at the end of this statement",
);
let explanation = self.explain_why_borrow_contains_point(context, borrow, None);
match explanation {
BorrowExplanation::UsedLater(..)
| BorrowExplanation::UsedLaterInLoop(..)
......@@ -830,6 +915,189 @@ fn report_temporary_value_does_not_live_long_enough(
err
}
fn report_cannot_return_reference_to_local(
&self,
borrow: &BorrowData<'tcx>,
borrow_span: Span,
return_span: Span,
opt_place_desc: Option<&String>,
) -> DiagnosticBuilder<'cx> {
let tcx = self.infcx.tcx;
// FIXME use a better heuristic than Spans
let reference_desc = if return_span == self.mir.source_info(borrow.reserve_location).span {
"reference to"
} else {
"value referencing"
};
let (place_desc, note) = if let Some(place_desc) = opt_place_desc {
let local_kind = match borrow.borrowed_place {
Place::Local(local) => {
match self.mir.local_kind(local) {
LocalKind::ReturnPointer
| LocalKind::Temp => bug!("temporary or return pointer with a name"),
LocalKind::Var => "local variable ",
LocalKind::Arg
if !self.mir.upvar_decls.is_empty()
&& local == Local::new(1) => {
"variable captured by `move` "
}
LocalKind::Arg => {
"function parameter "
}
}
}
_ => "local data ",
};
(
format!("{}`{}`", local_kind, place_desc),
format!("`{}` is borrowed here", place_desc),
)
} else {
let root_place = self.prefixes(&borrow.borrowed_place, PrefixSet::All)
.last()
.unwrap();
let local = if let Place::Local(local) = *root_place {
local
} else {
bug!("report_cannot_return_reference_to_local: not a local")
};
match self.mir.local_kind(local) {
LocalKind::ReturnPointer | LocalKind::Temp => {
(
"temporary value".to_string(),
"temporary value created here".to_string(),
)
}
LocalKind::Arg => {
(
"function parameter".to_string(),
"function parameter borrowed here".to_string(),
)
},
LocalKind::Var => bug!("local variable without a name"),
}
};
let mut err = tcx.cannot_return_reference_to_local(
return_span,
reference_desc,
&place_desc,
Origin::Mir,
);
if return_span != borrow_span {
err.span_label(borrow_span, note);
}
err
}
fn report_escaping_closure_capture(
&mut self,
args_span: Span,
var_span: Span,
fr_name: &RegionName,
category: ConstraintCategory,
constraint_span: Span,
captured_var: &str,
) -> DiagnosticBuilder<'cx> {
let tcx = self.infcx.tcx;
let mut err = tcx.cannot_capture_in_long_lived_closure(
args_span,
captured_var,
var_span,
Origin::Mir,
);
let suggestion = match tcx.sess.source_map().span_to_snippet(args_span) {
Ok(string) => format!("move {}", string),
Err(_) => "move |<args>| <body>".to_string()
};
err.span_suggestion_with_applicability(
args_span,
&format!("to force the closure to take ownership of {} (and any \
other referenced variables), use the `move` keyword",
captured_var),
suggestion,
Applicability::MachineApplicable,
);
match category {
ConstraintCategory::Return => {
err.span_note(constraint_span, &format!("closure is returned here"));
}
ConstraintCategory::CallArgument => {
fr_name.highlight_region_name(&mut err);
err.span_note(
constraint_span,
&format!("function requires argument type to outlive `{}`", fr_name),
);
}
_ => bug!("report_escaping_closure_capture called with unexpected constraint \
category: `{:?}`", category),
}
err
}
fn report_escaping_data(
&mut self,
borrow_span: Span,
name: &Option<String>,
upvar_span: Span,
upvar_name: &str,
escape_span: Span,
) -> DiagnosticBuilder<'cx> {
let tcx = self.infcx.tcx;
let escapes_from = if tcx.is_closure(self.mir_def_id) {
let tables = tcx.typeck_tables_of(self.mir_def_id);
let mir_hir_id = tcx.hir.def_index_to_hir_id(self.mir_def_id.index);
match tables.node_id_to_type(mir_hir_id).sty {
ty::Closure(..) => "closure",
ty::Generator(..) => "generator",
_ => bug!("Closure body doesn't have a closure or generator type"),
}
} else {
"function"
};
let mut err = tcx.borrowed_data_escapes_closure(escape_span, escapes_from, Origin::Mir);
err.span_label(
upvar_span,
format!(
"`{}` is declared here, outside of the {} body",
upvar_name, escapes_from
),
);
err.span_label(
borrow_span,
format!(
"borrow is only valid in the {} body",
escapes_from
),
);
if let Some(name) = name {
err.span_label(
escape_span,
format!("reference to `{}` escapes the {} body here", name, escapes_from),
);
} else {
err.span_label(
escape_span,
format!("reference escapes the {} body here", escapes_from),
);
}
err
}
fn get_moved_indexes(&mut self, context: Context, mpi: MovePathIndex) -> Vec<MoveSite> {
let mir = self.mir;
......
src/librustc_mir/borrow_check/nll/explain_borrow/mod.rs
浏览文件 @ 31b97f78
......@@ -10,19 +10,21 @@
use borrow_check::borrow_set::BorrowData;
use borrow_check::error_reporting::UseSpans;
use borrow_check::nll::region_infer::Cause;
use borrow_check::nll::ConstraintDescription;
use borrow_check::nll::region_infer::{Cause, RegionName};
use borrow_check::{Context, MirBorrowckCtxt, WriteKind};
use rustc::ty::{self, Region, TyCtxt};
use rustc::ty::{self, TyCtxt};
use rustc::mir::{
CastKind, FakeReadCause, Local, Location, Mir, Operand, Place, Projection, ProjectionElem,
Rvalue, Statement, StatementKind, TerminatorKind
CastKind, ConstraintCategory, FakeReadCause, Local, Location, Mir, Operand,
Place, Projection, ProjectionElem, Rvalue, Statement, StatementKind,
TerminatorKind
};
use rustc_errors::DiagnosticBuilder;
use syntax_pos::Span;
mod find_use;
pub(in borrow_check) enum BorrowExplanation<'tcx> {
pub(in borrow_check) enum BorrowExplanation {
UsedLater(LaterUseKind, Span),
UsedLaterInLoop(LaterUseKind, Span),
UsedLaterWhenDropped {
......@@ -30,7 +32,13 @@ pub(in borrow_check) enum BorrowExplanation<'tcx> {
dropped_local: Local,
should_note_order: bool,
},
MustBeValidFor(Region<'tcx>),
MustBeValidFor {
category: ConstraintCategory,
from_closure: bool,
span: Span,
region_name: RegionName,
opt_place_desc: Option<String>,
},
Unexplained,
}
......@@ -43,8 +51,8 @@ pub(in borrow_check) enum LaterUseKind {
Other,
}
impl<'tcx> BorrowExplanation<'tcx> {
pub(in borrow_check) fn add_explanation_to_diagnostic<'cx, 'gcx>(
impl BorrowExplanation {
pub(in borrow_check) fn add_explanation_to_diagnostic<'cx, 'gcx, 'tcx>(
&self,
tcx: TyCtxt<'cx, 'gcx, 'tcx>,
mir: &Mir<'tcx>,
......@@ -142,15 +150,27 @@ pub(in borrow_check) fn add_explanation_to_diagnostic<'cx, 'gcx>(
}
}
}
}
BorrowExplanation::MustBeValidFor(region) => {
tcx.note_and_explain_free_region(
err,
&format!("{}{}", borrow_desc, "borrowed value must be valid for "),
region,
"...",
);
},
BorrowExplanation::MustBeValidFor {
category,
span,
ref region_name,
ref opt_place_desc,
from_closure: _,
} => {
region_name.highlight_region_name(err);
if let Some(desc) = opt_place_desc {
err.span_label(span, format!(
"{}requires that `{}` is borrowed for `{}`",
category.description(), desc, region_name,
));
} else {
err.span_label(span, format!(
"{}requires that {}borrow lasts for `{}`",
category.description(), borrow_desc, region_name,
));
};
},
_ => {},
}
......@@ -176,7 +196,7 @@ pub(in borrow_check) fn explain_why_borrow_contains_point(
context: Context,
borrow: &BorrowData<'tcx>,
kind_place: Option<(WriteKind, &Place<'tcx>)>,
) -> BorrowExplanation<'tcx> {
) -> BorrowExplanation {
debug!(
"explain_why_borrow_contains_point(context={:?}, borrow={:?}, kind_place={:?})",
context, borrow, kind_place
......@@ -241,11 +261,27 @@ pub(in borrow_check) fn explain_why_borrow_contains_point(
}
}
None => if let Some(region) = regioncx.to_error_region(region_sub) {
BorrowExplanation::MustBeValidFor(region)
None => if let Some(region) = regioncx.to_error_region_vid(borrow_region_vid) {
let (category, from_closure, span, region_name) = self
.nonlexical_regioncx
.free_region_constraint_info(
self.mir,
self.mir_def_id,
self.infcx,
borrow_region_vid,
region,
);
let opt_place_desc = self.describe_place(&borrow.borrowed_place);
BorrowExplanation::MustBeValidFor {
category,
from_closure,
span,
region_name,
opt_place_desc,
}
} else {
BorrowExplanation::Unexplained
},
}
}
}
......
src/librustc_mir/borrow_check/nll/mod.rs
浏览文件 @ 31b97f78
......@@ -371,3 +371,7 @@ fn to_region_vid(self) -> RegionVid {
self
}
}
crate trait ConstraintDescription {
fn description(&self) -> &'static str;
}
src/librustc_mir/borrow_check/nll/region_infer/error_reporting/mod.rs
浏览文件 @ 31b97f78
......@@ -8,11 +8,12 @@
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use borrow_check::nll::ConstraintDescription;
use borrow_check::nll::constraints::{OutlivesConstraint};
use borrow_check::nll::region_infer::RegionInferenceContext;
use borrow_check::nll::region_infer::error_reporting::region_name::RegionNameSource;
use borrow_check::nll::type_check::Locations;
use borrow_check::nll::universal_regions::DefiningTy;
use util::borrowck_errors::{BorrowckErrors, Origin};
use rustc::hir::def_id::DefId;
use rustc::infer::error_reporting::nice_region_error::NiceRegionError;
use rustc::infer::InferCtxt;
......@@ -28,11 +29,7 @@
mod region_name;
mod var_name;
use self::region_name::RegionName;
trait ConstraintDescription {
fn description(&self) -> &'static str;
}
crate use self::region_name::{RegionName, RegionNameSource};
impl ConstraintDescription for ConstraintCategory {
fn description(&self) -> &'static str {
......@@ -40,6 +37,8 @@ fn description(&self) -> &'static str {
match self {
ConstraintCategory::Assignment => "assignment ",
ConstraintCategory::Return => "returning this value ",
ConstraintCategory::UseAsConst => "using this value as a constant ",
ConstraintCategory::UseAsStatic => "using this value as a static ",
ConstraintCategory::Cast => "cast ",
ConstraintCategory::CallArgument => "argument ",
ConstraintCategory::TypeAnnotation => "type annotation ",
......@@ -73,7 +72,7 @@ fn best_blame_constraint(
mir: &Mir<'tcx>,
from_region: RegionVid,
target_test: impl Fn(RegionVid) -> bool,
) -> (ConstraintCategory, Span, RegionVid) {
) -> (ConstraintCategory, bool, Span) {
debug!("best_blame_constraint(from_region={:?})", from_region);
// Find all paths
......@@ -93,13 +92,13 @@ fn best_blame_constraint(
);
// Classify each of the constraints along the path.
let mut categorized_path: Vec<(ConstraintCategory, Span)> = path
let mut categorized_path: Vec<(ConstraintCategory, bool, Span)> = path
.iter()
.map(|constraint| {
if constraint.category == ConstraintCategory::ClosureBounds {
self.retrieve_closure_constraint_info(mir, &constraint)
} else {
(constraint.category, constraint.locations.span(mir))
(constraint.category, false, constraint.locations.span(mir))
}
})
.collect();
......@@ -138,12 +137,13 @@ fn best_blame_constraint(
| ConstraintCategory::Boring
| ConstraintCategory::BoringNoLocation
| ConstraintCategory::Internal => false,
ConstraintCategory::TypeAnnotation
| ConstraintCategory::Return => true,
_ => constraint_sup_scc != target_scc,
}
});
if let Some(i) = best_choice {
let (category, span) = categorized_path[i];
return (category, span, target_region);
return categorized_path[i]
}
// If that search fails, that is.. unusual. Maybe everything
......@@ -151,11 +151,9 @@ fn best_blame_constraint(
// appears to be the most interesting point to report to the
// user via an even more ad-hoc guess.
categorized_path.sort_by(|p0, p1| p0.0.cmp(&p1.0));
debug!("best_blame_constraint: sorted_path={:#?}", categorized_path);
debug!("`: sorted_path={:#?}", categorized_path);
let &(category, span) = categorized_path.first().unwrap();
(category, span, target_region)
*categorized_path.first().unwrap()
}
/// Walks the graph of constraints (where `'a: 'b` is considered
......@@ -242,7 +240,7 @@ pub(super) fn report_error(
) {
debug!("report_error(fr={:?}, outlived_fr={:?})", fr, outlived_fr);
let (category, span, _) = self.best_blame_constraint(
let (category, _, span) = self.best_blame_constraint(
mir,
fr,
|r| r == outlived_fr
......@@ -373,21 +371,25 @@ fn report_escaping_data_error(
let outlived_fr_name_and_span =
self.get_var_name_and_span_for_region(infcx.tcx, mir, outlived_fr);
let escapes_from = if infcx.tcx.is_closure(mir_def_id) { "closure" } else { "function" };
let escapes_from = match self.universal_regions.defining_ty {
DefiningTy::Closure(..) => "closure",
DefiningTy::Generator(..) => "generator",
DefiningTy::FnDef(..) => "function",
DefiningTy::Const(..) => "const"
};
// Revert to the normal error in these cases.
// Assignments aren't "escapes" in function items.
if (fr_name_and_span.is_none() && outlived_fr_name_and_span.is_none())
|| (category == ConstraintCategory::Assignment && escapes_from == "function")
|| escapes_from == "const"
{
return self.report_general_error(mir, infcx, mir_def_id,
fr, true, outlived_fr, false,
category, span, errors_buffer);
}
let mut diag = infcx.tcx.sess.struct_span_err(
span, &format!("borrowed data escapes outside of {}", escapes_from),
);
let mut diag = infcx.tcx.borrowed_data_escapes_closure(span, escapes_from, Origin::Mir);
if let Some((Some(outlived_fr_name), outlived_fr_span)) = outlived_fr_name_and_span {
diag.span_label(
......@@ -571,6 +573,24 @@ fn add_static_impl_trait_suggestion(
}
}
crate fn free_region_constraint_info(
&self,
mir: &Mir<'tcx>,
mir_def_id: DefId,
infcx: &InferCtxt<'_, '_, 'tcx>,
borrow_region: RegionVid,
outlived_region: RegionVid,
) -> (ConstraintCategory, bool, Span, RegionName) {
let (category, from_closure, span) = self.best_blame_constraint(
mir,
borrow_region,
|r| r == outlived_region
);
let outlived_fr_name = self.give_region_a_name(
infcx, mir, mir_def_id, outlived_region, &mut 1);
(category, from_closure, span, outlived_fr_name)
}
// Finds some region R such that `fr1: R` and `R` is live at
// `elem`.
crate fn find_sub_region_live_at(&self, fr1: RegionVid, elem: Location) -> RegionVid {
......@@ -589,7 +609,7 @@ fn add_static_impl_trait_suggestion(
fr1: RegionVid,
fr2: RegionVid,
) -> (ConstraintCategory, Span) {
let (category, span, _) = self.best_blame_constraint(mir, fr1, |r| r == fr2);
let (category, _, span) = self.best_blame_constraint(mir, fr1, |r| r == fr2);
(category, span)
}
......@@ -597,16 +617,18 @@ fn retrieve_closure_constraint_info(
&self,
mir: &Mir<'tcx>,
constraint: &OutlivesConstraint
) -> (ConstraintCategory, Span) {
) -> (ConstraintCategory, bool, Span) {
let loc = match constraint.locations {
Locations::All(span) => return (constraint.category, span),
Locations::All(span) => return (constraint.category, false, span),
Locations::Single(loc) => loc,
};
let opt_span_category = self
.closure_bounds_mapping[&loc]
.get(&(constraint.sup, constraint.sub));
*opt_span_category.unwrap_or(&(constraint.category, mir.source_info(loc).span))
opt_span_category
.map(|&(category, span)| (category, true, span))
.unwrap_or((constraint.category, false, mir.source_info(loc).span))
}
/// Returns `true` if a closure is inferred to be an `FnMut` closure.
......
src/librustc_mir/borrow_check/nll/region_infer/mod.rs
浏览文件 @ 31b97f78
......@@ -35,6 +35,7 @@
mod dump_mir;
mod error_reporting;
crate use self::error_reporting::{RegionName, RegionNameSource};
mod graphviz;
pub mod values;
use self::values::{LivenessValues, RegionValueElements, RegionValues};
......@@ -669,13 +670,19 @@ fn check_type_tests<'gcx>(
/// to find a good name from that. Returns `None` if we can't find
/// one (e.g., this is just some random part of the CFG).
pub fn to_error_region(&self, r: RegionVid) -> Option<ty::Region<'tcx>> {
self.to_error_region_vid(r).and_then(|r| self.definitions[r].external_name)
}
/// Returns the [RegionVid] corresponding to the region returned by
/// `to_error_region`.
pub fn to_error_region_vid(&self, r: RegionVid) -> Option<RegionVid> {
if self.universal_regions.is_universal_region(r) {
return self.definitions[r].external_name;
Some(r)
} else {
let r_scc = self.constraint_sccs.scc(r);
let upper_bound = self.universal_upper_bound(r);
if self.scc_values.contains(r_scc, upper_bound) {
self.to_error_region(upper_bound)
self.to_error_region_vid(upper_bound)
} else {
None
}
......
src/librustc_mir/borrow_check/nll/type_check/mod.rs
浏览文件 @ 31b97f78
......@@ -23,7 +23,7 @@
use borrow_check::nll::type_check::free_region_relations::{
CreateResult, UniversalRegionRelations,
};
use borrow_check::nll::universal_regions::UniversalRegions;
use borrow_check::nll::universal_regions::{DefiningTy, UniversalRegions};
use borrow_check::nll::ToRegionVid;
use dataflow::move_paths::MoveData;
use dataflow::FlowAtLocation;
......@@ -1209,7 +1209,21 @@ fn check_stmt(&mut self, mir: &Mir<'tcx>, stmt: &Statement<'tcx>, location: Loca
// of lowering. Assignments to other sorts of places *are* interesting
// though.
let category = match *place {
Place::Local(RETURN_PLACE) => ConstraintCategory::Return,
Place::Local(RETURN_PLACE) => if let Some(BorrowCheckContext {
universal_regions: UniversalRegions {
defining_ty: DefiningTy::Const(def_id, _),
..
},
..
}) = self.borrowck_context {
if tcx.is_static(*def_id).is_some() {
ConstraintCategory::UseAsStatic
} else {
ConstraintCategory::UseAsConst
}
} else {
ConstraintCategory::Return
}
Place::Local(l) if !mir.local_decls[l].is_user_variable.is_some() => {
ConstraintCategory::Boring
}
......@@ -1391,6 +1405,7 @@ fn check_terminator(
ref func,
ref args,
ref destination,
from_hir_call,
..
} => {
let func_ty = func.ty(mir, tcx);
......@@ -1435,7 +1450,7 @@ fn check_terminator(
}
}
self.check_call_inputs(mir, term, &sig, args, term_location);
self.check_call_inputs(mir, term, &sig, args, term_location, from_hir_call);
}
TerminatorKind::Assert {
ref cond, ref msg, ..
......@@ -1493,7 +1508,23 @@ fn check_call_dest(
Some((ref dest, _target_block)) => {
let dest_ty = dest.ty(mir, tcx).to_ty(tcx);
let category = match *dest {
Place::Local(RETURN_PLACE) => ConstraintCategory::Return,
Place::Local(RETURN_PLACE) => {
if let Some(BorrowCheckContext {
universal_regions: UniversalRegions {
defining_ty: DefiningTy::Const(def_id, _),
..
},
..
}) = self.borrowck_context {
if tcx.is_static(*def_id).is_some() {
ConstraintCategory::UseAsStatic
} else {
ConstraintCategory::UseAsConst
}
} else {
ConstraintCategory::Return
}
},
Place::Local(l) if !mir.local_decls[l].is_user_variable.is_some() => {
ConstraintCategory::Boring
}
......@@ -1538,6 +1569,7 @@ fn check_call_inputs(
sig: &ty::FnSig<'tcx>,
args: &[Operand<'tcx>],
term_location: Location,
from_hir_call: bool,
) {
debug!("check_call_inputs({:?}, {:?})", sig, args);
if args.len() < sig.inputs().len() || (args.len() > sig.inputs().len() && !sig.variadic) {
......@@ -1545,11 +1577,16 @@ fn check_call_inputs(
}
for (n, (fn_arg, op_arg)) in sig.inputs().iter().zip(args).enumerate() {
let op_arg_ty = op_arg.ty(mir, self.tcx());
let category = if from_hir_call {
ConstraintCategory::CallArgument
} else {
ConstraintCategory::Boring
};
if let Err(terr) = self.sub_types(
op_arg_ty,
fn_arg,
term_location.to_locations(),
ConstraintCategory::CallArgument,
category,
) {
span_mirbug!(
self,
......
src/librustc_mir/diagnostics.rs
浏览文件 @ 31b97f78
......@@ -2011,6 +2011,46 @@ fn main() {
```
"##,
E0515: r##"
Cannot return value that references local variable
Local variables, function parameters and temporaries are all dropped before the
end of the function body. So a reference to them cannot be returned.
```compile_fail,E0515
#![feature(nll)]
fn get_dangling_reference() -> &'static i32 {
let x = 0;
&x
}
```
```compile_fail,E0515
#![feature(nll)]
use std::slice::Iter;
fn get_dangling_iterator<'a>() -> Iter<'a, i32> {
let v = vec![1, 2, 3];
v.iter()
}
```
Consider returning an owned value instead:
```
use std::vec::IntoIter;
fn get_integer() -> i32 {
let x = 0;
x
}
fn get_owned_iterator() -> IntoIter<i32> {
let v = vec![1, 2, 3];
v.into_iter()
}
```
"##,
E0595: r##"
Closures cannot mutate immutable captured variables.
......@@ -2339,6 +2379,7 @@ fn foo() -> i32 { 22 }
// E0471, // constant evaluation error (in pattern)
// E0385, // {} in an aliasable location
E0493, // destructors cannot be evaluated at compile-time
E0521, // borrowed data escapes outside of closure
E0524, // two closures require unique access to `..` at the same time
E0526, // shuffle indices are not constant
E0594, // cannot assign to {}
......
src/librustc_mir/util/borrowck_errors.rs
浏览文件 @ 31b97f78
......@@ -632,6 +632,31 @@ fn path_does_not_live_long_enough(
self.cancel_if_wrong_origin(err, o)
}
fn cannot_return_reference_to_local(
self,
span: Span,
reference_desc: &str,
path_desc: &str,
o: Origin,
) -> DiagnosticBuilder<'cx> {
let mut err = struct_span_err!(
self,
span,
E0515,
"cannot return {REFERENCE} {LOCAL}{OGN}",
REFERENCE=reference_desc,
LOCAL=path_desc,
OGN = o
);
err.span_label(
span,
format!("returns a {} data owned by the current function", reference_desc),
);
self.cancel_if_wrong_origin(err, o)
}
fn lifetime_too_short_for_reborrow(
self,
span: Span,
......@@ -717,6 +742,24 @@ fn cannot_capture_in_long_lived_closure(
self.cancel_if_wrong_origin(err, o)
}
fn borrowed_data_escapes_closure(
self,
escape_span: Span,
escapes_from: &str,
o: Origin,
) -> DiagnosticBuilder<'cx> {
let err = struct_span_err!(
self,
escape_span,
E0521,
"borrowed data escapes outside of {}{OGN}",
escapes_from,
OGN = o
);
self.cancel_if_wrong_origin(err, o)
}
fn thread_local_value_does_not_live_long_enough(
self,
span: Span,
......
src/test/ui/borrowck/borrowck-borrow-from-temporary.nll.stderr
浏览文件 @ 31b97f78
error[E0716]: temporary value dropped while borrowed
--> $DIR/borrowck-borrow-from-temporary.rs:19:24
error[E0515]: cannot return value referencing temporary value
--> $DIR/borrowck-borrow-from-temporary.rs:20:5
|
LL | let &Foo(ref x) = &id(Foo(3)); //~ ERROR borrowed value does not live long enough
| ^^^^^^^^^^ creates a temporary which is freed while still in use
| ---------- temporary value created here
LL | x
LL | }
| - temporary value is freed at the end of this statement
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 18:8...
--> $DIR/borrowck-borrow-from-temporary.rs:18:8
|
LL | fn foo<'a>() -> &'a isize {
| ^^
| ^ returns a value referencing data owned by the current function
error: aborting due to previous error
For more information about this error, try `rustc --explain E0716`.
For more information about this error, try `rustc --explain E0515`.
src/test/ui/borrowck/borrowck-escaping-closure-error-1.nll.stderr
浏览文件 @ 31b97f78
error[E0597]: `books` does not live long enough
--> $DIR/borrowck-escaping-closure-error-1.rs:23:14
error[E0373]: closure may outlive the current function, but it borrows `books`, which is owned by the current function
--> $DIR/borrowck-escaping-closure-error-1.rs:23:11
|
LL | spawn(|| books.push(4));
| -- ^^^^^ borrowed value does not live long enough
| ^^ ----- `books` is borrowed here
| |
| value captured here
LL | //~^ ERROR E0373
LL | }
| - `books` dropped here while still borrowed
| may outlive borrowed value `books`
|
= note: borrowed value must be valid for the static lifetime...
note: function requires argument type to outlive `'static`
--> $DIR/borrowck-escaping-closure-error-1.rs:23:5
|
LL | spawn(|| books.push(4));
| ^^^^^^^^^^^^^^^^^^^^^^^
help: to force the closure to take ownership of `books` (and any other referenced variables), use the `move` keyword
|
LL | spawn(move || books.push(4));
| ^^^^^^^
error: aborting due to previous error
For more information about this error, try `rustc --explain E0597`.
For more information about this error, try `rustc --explain E0373`.
src/test/ui/borrowck/borrowck-escaping-closure-error-2.nll.stderr
浏览文件 @ 31b97f78
error[E0597]: `books` does not live long enough
--> $DIR/borrowck-escaping-closure-error-2.rs:21:17
error[E0373]: closure may outlive the current function, but it borrows `books`, which is owned by the current function
--> $DIR/borrowck-escaping-closure-error-2.rs:21:14
|
LL | Box::new(|| books.push(4))
| -- ^^^^^ borrowed value does not live long enough
| ^^ ----- `books` is borrowed here
| |
| value captured here
LL | //~^ ERROR E0373
LL | }
| - `books` dropped here while still borrowed
| may outlive borrowed value `books`
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 19:8...
--> $DIR/borrowck-escaping-closure-error-2.rs:19:8
note: closure is returned here
--> $DIR/borrowck-escaping-closure-error-2.rs:21:5
|
LL | fn foo<'a>(x: &'a i32) -> Box<FnMut()+'a> {
| ^^
LL | Box::new(|| books.push(4))
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
help: to force the closure to take ownership of `books` (and any other referenced variables), use the `move` keyword
|
LL | Box::new(move || books.push(4))
| ^^^^^^^
error: aborting due to previous error
For more information about this error, try `rustc --explain E0597`.
For more information about this error, try `rustc --explain E0373`.
src/test/ui/borrowck/borrowck-fn-in-const-c.nll.stderr
浏览文件 @ 31b97f78
......@@ -2,11 +2,9 @@ error[E0713]: borrow may still be in use when destructor runs
--> $DIR/borrowck-fn-in-const-c.rs:27:16
|
LL | return &local.inner; //~ ERROR does not live long enough
| ^^^^^^^^^^^^
| ^^^^^^^^^^^^ returning this value requires that `local.inner` is borrowed for `'static`
LL | }
| - here, drop of `local` needs exclusive access to `local.inner`, because the type `DropString` implements the `Drop` trait
|
= note: borrowed value must be valid for the static lifetime...
error: aborting due to previous error
......
src/test/ui/borrowck/borrowck-loan-of-static-data-issue-27616.nll.stderr
浏览文件 @ 31b97f78
......@@ -2,12 +2,12 @@ error[E0506]: cannot assign to `*s` because it is borrowed
--> $DIR/borrowck-loan-of-static-data-issue-27616.rs:26:5
|
LL | let alias: &'static mut String = s;
| - borrow of `*s` occurs here
| ------------------- - borrow of `*s` occurs here
| |
| type annotation requires that `*s` is borrowed for `'static`
...
LL | *s = String::new(); //~ ERROR cannot assign
| ^^ assignment to borrowed `*s` occurs here
|
= note: borrowed value must be valid for the static lifetime...
error: aborting due to previous error
......
src/test/ui/borrowck/borrowck-local-borrow-outlives-fn.ast.nll.stderr
浏览文件 @ 31b97f78
error[E0597]: `x` does not live long enough
error[E0515]: cannot return reference to function parameter `x`
--> $DIR/borrowck-local-borrow-outlives-fn.rs:15:5
|
LL | &x
| ^^ borrowed value does not live long enough
...
LL | }
| - `x` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
| ^^ returns a reference to data owned by the current function
error: aborting due to previous error
For more information about this error, try `rustc --explain E0597`.
For more information about this error, try `rustc --explain E0515`.
src/test/ui/borrowck/borrowck-local-borrow-outlives-fn.mir.stderr
浏览文件 @ 31b97f78
error[E0597]: `x` does not live long enough
error[E0515]: cannot return reference to function parameter `x`
--> $DIR/borrowck-local-borrow-outlives-fn.rs:15:5
|
LL | &x
| ^^ borrowed value does not live long enough
...
LL | }
| - `x` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
| ^^ returns a reference to data owned by the current function
error: aborting due to previous error
For more information about this error, try `rustc --explain E0597`.
For more information about this error, try `rustc --explain E0515`.
src/test/ui/borrowck/borrowck-local-borrow-outlives-fn.rs
浏览文件 @ 31b97f78
......@@ -14,7 +14,7 @@
fn cplusplus_mode(x: isize) -> &'static isize {
&x
//[ast]~^ ERROR `x` does not live long enough [E0597]
//[mir]~^^ ERROR `x` does not live long enough [E0597]
//[mir]~^^ ERROR cannot return reference to function parameter `x` [E0515]
}
fn main() {}
src/test/ui/borrowck/borrowck-local-borrow-with-panic-outlives-fn.ast.nll.stderr
浏览文件 @ 31b97f78
......@@ -2,12 +2,13 @@ error[E0597]: `z.1` does not live long enough
--> $DIR/borrowck-local-borrow-with-panic-outlives-fn.rs:16:15
|
LL | *x = Some(&mut z.1);
| ^^^^^^^^ borrowed value does not live long enough
| ----------^^^^^^^^-
| | |
| | borrowed value does not live long enough
| assignment requires that `z.1` is borrowed for `'static`
...
LL | }
| - `z.1` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
error: aborting due to previous error
......
src/test/ui/borrowck/borrowck-local-borrow-with-panic-outlives-fn.mir.stderr
浏览文件 @ 31b97f78
......@@ -2,12 +2,13 @@ error[E0597]: `z.1` does not live long enough
--> $DIR/borrowck-local-borrow-with-panic-outlives-fn.rs:16:15
|
LL | *x = Some(&mut z.1);
| ^^^^^^^^ borrowed value does not live long enough
| ----------^^^^^^^^-
| | |
| | borrowed value does not live long enough
| assignment requires that `z.1` is borrowed for `'static`
...
LL | }
| - `z.1` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
error: aborting due to previous error
......
src/test/ui/borrowck/borrowck-return-variable-on-stack-via-clone.nll.stderr
浏览文件 @ 31b97f78
error[E0597]: `x` does not live long enough
error[E0515]: cannot return value referencing function parameter `x`
--> $DIR/borrowck-return-variable-on-stack-via-clone.rs:17:5
|
LL | (&x).clone() //~ ERROR `x` does not live long enough
| ^^^^ borrowed value does not live long enough
LL | }
| - `x` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 16:9...
--> $DIR/borrowck-return-variable-on-stack-via-clone.rs:16:9
|
LL | fn leak<'a, T>(x: T) -> &'a T {
| ^^
| ----^^^^^^^^
| |
| returns a value referencing data owned by the current function
| `x` is borrowed here
error: aborting due to previous error
For more information about this error, try `rustc --explain E0597`.
For more information about this error, try `rustc --explain E0515`.
src/test/ui/borrowck/borrowck-vec-pattern-element-loan.nll.stderr
浏览文件 @ 31b97f78
error[E0597]: `vec` does not live long enough
--> $DIR/borrowck-vec-pattern-element-loan.rs:15:25
error[E0515]: cannot return value referencing local variable `vec`
--> $DIR/borrowck-vec-pattern-element-loan.rs:20:5
|
LL | let vec: &[isize] = &vec; //~ ERROR does not live long enough
| ^^^^ borrowed value does not live long enough
| ---- `vec` is borrowed here
...
LL | }
| - `vec` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 13:6...
--> $DIR/borrowck-vec-pattern-element-loan.rs:13:6
|
LL | fn a<'a>() -> &'a [isize] {
| ^^
LL | tail
| ^^^^ returns a value referencing data owned by the current function
error[E0597]: `vec` does not live long enough
--> $DIR/borrowck-vec-pattern-element-loan.rs:25:25
error[E0515]: cannot return value referencing local variable `vec`
--> $DIR/borrowck-vec-pattern-element-loan.rs:30:5
|
LL | let vec: &[isize] = &vec; //~ ERROR does not live long enough
| ^^^^ borrowed value does not live long enough
| ---- `vec` is borrowed here
...
LL | }
| - `vec` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 23:6...
--> $DIR/borrowck-vec-pattern-element-loan.rs:23:6
|
LL | fn b<'a>() -> &'a [isize] {
| ^^
LL | init
| ^^^^ returns a value referencing data owned by the current function
error[E0597]: `vec` does not live long enough
--> $DIR/borrowck-vec-pattern-element-loan.rs:35:25
error[E0515]: cannot return value referencing local variable `vec`
--> $DIR/borrowck-vec-pattern-element-loan.rs:40:5
|
LL | let vec: &[isize] = &vec; //~ ERROR does not live long enough
| ^^^^ borrowed value does not live long enough
| ---- `vec` is borrowed here
...
LL | }
| - `vec` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 33:6...
--> $DIR/borrowck-vec-pattern-element-loan.rs:33:6
|
LL | fn c<'a>() -> &'a [isize] {
| ^^
LL | slice
| ^^^^^ returns a value referencing data owned by the current function
error: aborting due to 3 previous errors
For more information about this error, try `rustc --explain E0597`.
For more information about this error, try `rustc --explain E0515`.
src/test/ui/borrowck/borrowck-vec-pattern-tail-element-loan.nll.stderr
浏览文件 @ 31b97f78
error[E0597]: `vec` does not live long enough
--> $DIR/borrowck-vec-pattern-tail-element-loan.rs:15:25
error[E0515]: cannot return value referencing local variable `vec`
--> $DIR/borrowck-vec-pattern-tail-element-loan.rs:20:5
|
LL | let vec: &[isize] = &vec; //~ ERROR `vec` does not live long enough
| ^^^^ borrowed value does not live long enough
| ---- `vec` is borrowed here
...
LL | }
| - `vec` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 13:6...
--> $DIR/borrowck-vec-pattern-tail-element-loan.rs:13:6
|
LL | fn a<'a>() -> &'a isize {
| ^^
LL | tail
| ^^^^ returns a value referencing data owned by the current function
error: aborting due to previous error
For more information about this error, try `rustc --explain E0597`.
For more information about this error, try `rustc --explain E0515`.
src/test/ui/borrowck/issue-45983.nll.stderr
浏览文件 @ 31b97f78
error: borrowed data escapes outside of closure
error[E0521]: borrowed data escapes outside of closure
--> $DIR/issue-45983.rs:36:18
|
LL | let x = None;
......@@ -18,4 +18,5 @@ LL | give_any(|y| x = Some(y));
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0594`.
Some errors occurred: E0521, E0594.
For more information about an error, try `rustc --explain E0521`.
src/test/ui/borrowck/mut-borrow-in-loop.nll.stderr
浏览文件 @ 31b97f78
error[E0499]: cannot borrow `*arg` as mutable more than once at a time
--> $DIR/mut-borrow-in-loop.rs:20:25
|
LL | (self.func)(arg) //~ ERROR cannot borrow
| ^^^ mutable borrow starts here in previous iteration of loop
|
note: first borrowed value must be valid for the lifetime 'a as defined on the impl at 17:6...
--> $DIR/mut-borrow-in-loop.rs:17:6
|
LL | impl<'a, T : 'a> FuncWrapper<'a, T> {
| ^^
| -- lifetime `'a` defined here
...
LL | (self.func)(arg) //~ ERROR cannot borrow
| ------------^^^-
| | |
| | mutable borrow starts here in previous iteration of loop
| argument requires that `*arg` is borrowed for `'a`
error[E0499]: cannot borrow `*arg` as mutable more than once at a time
--> $DIR/mut-borrow-in-loop.rs:26:25
|
LL | (self.func)(arg) //~ ERROR cannot borrow
| ^^^ mutable borrow starts here in previous iteration of loop
|
note: first borrowed value must be valid for the lifetime 'a as defined on the impl at 17:6...
--> $DIR/mut-borrow-in-loop.rs:17:6
|
LL | impl<'a, T : 'a> FuncWrapper<'a, T> {
| ^^
| -- lifetime `'a` defined here
...
LL | (self.func)(arg) //~ ERROR cannot borrow
| ------------^^^-
| | |
| | mutable borrow starts here in previous iteration of loop
| argument requires that `*arg` is borrowed for `'a`
error[E0499]: cannot borrow `*arg` as mutable more than once at a time
--> $DIR/mut-borrow-in-loop.rs:33:25
|
LL | (self.func)(arg) //~ ERROR cannot borrow
| ^^^ mutable borrow starts here in previous iteration of loop
|
note: first borrowed value must be valid for the lifetime 'a as defined on the impl at 17:6...
--> $DIR/mut-borrow-in-loop.rs:17:6
|
LL | impl<'a, T : 'a> FuncWrapper<'a, T> {
| ^^
| -- lifetime `'a` defined here
...
LL | (self.func)(arg) //~ ERROR cannot borrow
| ------------^^^-
| | |
| | mutable borrow starts here in previous iteration of loop
| argument requires that `*arg` is borrowed for `'a`
error: aborting due to 3 previous errors
......
src/test/ui/borrowck/promote-ref-mut-in-let-issue-46557.nll.stderr
浏览文件 @ 31b97f78
error[E0716]: temporary value dropped while borrowed
--> $DIR/promote-ref-mut-in-let-issue-46557.rs:15:21
error[E0515]: cannot return value referencing temporary value
--> $DIR/promote-ref-mut-in-let-issue-46557.rs:16:5
|
LL | let ref mut x = 1234543; //~ ERROR
| ^^^^^^^ creates a temporary which is freed while still in use
| ------- temporary value created here
LL | x
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
| ^ returns a value referencing data owned by the current function
error[E0716]: temporary value dropped while borrowed
--> $DIR/promote-ref-mut-in-let-issue-46557.rs:20:25
error[E0515]: cannot return value referencing temporary value
--> $DIR/promote-ref-mut-in-let-issue-46557.rs:21:5
|
LL | let (ref mut x, ) = (1234543, ); //~ ERROR
| ^^^^^^^^^^^ creates a temporary which is freed while still in use
| ----------- temporary value created here
LL | x
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
| ^ returns a value referencing data owned by the current function
error[E0716]: temporary value dropped while borrowed
--> $DIR/promote-ref-mut-in-let-issue-46557.rs:25:11
|
LL | match 1234543 {
| ^^^^^^^ creates a temporary which is freed while still in use
...
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0515]: cannot return value referencing temporary value
--> $DIR/promote-ref-mut-in-let-issue-46557.rs:25:5
|
LL | match 1234543 {
| ^ ------- temporary value created here
| _____|
| |
LL | | ref mut x => x //~ ERROR
LL | | }
| |_____^ returns a value referencing data owned by the current function
error[E0716]: temporary value dropped while borrowed
--> $DIR/promote-ref-mut-in-let-issue-46557.rs:31:11
|
LL | match (123443,) {
| ^^^^^^^^^ creates a temporary which is freed while still in use
...
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0515]: cannot return value referencing temporary value
--> $DIR/promote-ref-mut-in-let-issue-46557.rs:31:5
|
LL | match (123443,) {
| ^ --------- temporary value created here
| _____|
| |
LL | | (ref mut x,) => x, //~ ERROR
LL | | }
| |_____^ returns a value referencing data owned by the current function
error[E0716]: temporary value dropped while borrowed
--> $DIR/promote-ref-mut-in-let-issue-46557.rs:37:10
error[E0515]: cannot return reference to temporary value
--> $DIR/promote-ref-mut-in-let-issue-46557.rs:37:5
|
LL | &mut 1234543 //~ ERROR
| ^^^^^^^ creates a temporary which is freed while still in use
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
| ^^^^^-------
| | |
| | temporary value created here
| returns a reference to data owned by the current function
error: aborting due to 5 previous errors
For more information about this error, try `rustc --explain E0716`.
For more information about this error, try `rustc --explain E0515`.
src/test/ui/borrowck/two-phase-surprise-no-conflict.nll.stderr
浏览文件 @ 31b97f78
......@@ -68,17 +68,15 @@ LL | reg.register_bound(Box::new(CapturePass::new(&reg.sess_mut)));
error[E0502]: cannot borrow `*reg` as mutable because it is also borrowed as immutable
--> $DIR/two-phase-surprise-no-conflict.rs:183:5
|
LL | fn register_plugins<'a>(mk_reg: impl Fn() -> &'a mut Registry<'a>) {
| -- lifetime `'a` defined here
...
LL | reg.register_univ(Box::new(CapturePass::new(&reg.sess_mut)));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^-------------^^^
| | |
| | immutable borrow occurs here
| ^^^^^^^^^^^^^^^^^^-----------------------------------------^
| | | |
| | | immutable borrow occurs here
| | cast requires that `reg.sess_mut` is borrowed for `'a`
| mutable borrow occurs here
|
note: immutable borrowed value must be valid for the lifetime 'a as defined on the function body at 122:21...
--> $DIR/two-phase-surprise-no-conflict.rs:122:21
|
LL | fn register_plugins<'a>(mk_reg: impl Fn() -> &'a mut Registry<'a>) {
| ^^
error[E0502]: cannot borrow `*reg` as mutable because it is also borrowed as immutable
--> $DIR/two-phase-surprise-no-conflict.rs:188:5
......@@ -112,17 +110,15 @@ LL | reg.register_bound(Box::new(CapturePass::new_mut(&mut reg.sess_mut)));
error[E0499]: cannot borrow `*reg` as mutable more than once at a time
--> $DIR/two-phase-surprise-no-conflict.rs:206:5
|
LL | fn register_plugins<'a>(mk_reg: impl Fn() -> &'a mut Registry<'a>) {
| -- lifetime `'a` defined here
...
LL | reg.register_univ(Box::new(CapturePass::new_mut(&mut reg.sess_mut)));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^-----------------^^^
| | |
| | first mutable borrow occurs here
| ^^^^^^^^^^^^^^^^^^-------------------------------------------------^
| | | |
| | | first mutable borrow occurs here
| | cast requires that `reg.sess_mut` is borrowed for `'a`
| second mutable borrow occurs here
|
note: first borrowed value must be valid for the lifetime 'a as defined on the function body at 122:21...
--> $DIR/two-phase-surprise-no-conflict.rs:122:21
|
LL | fn register_plugins<'a>(mk_reg: impl Fn() -> &'a mut Registry<'a>) {
| ^^
error[E0499]: cannot borrow `reg.sess_mut` as mutable more than once at a time
--> $DIR/two-phase-surprise-no-conflict.rs:206:53
......
src/test/ui/consts/const-eval/dont_promote_unstable_const_fn.nll.stderr
浏览文件 @ 31b97f78
......@@ -10,33 +10,33 @@ error[E0716]: temporary value dropped while borrowed
--> $DIR/dont_promote_unstable_const_fn.rs:28:28
|
LL | let _: &'static u32 = &foo(); //~ ERROR does not live long enough
| ^^^^^ creates a temporary which is freed while still in use
| ------------ ^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0716]: temporary value dropped while borrowed
--> $DIR/dont_promote_unstable_const_fn.rs:32:28
|
LL | let _: &'static u32 = &meh(); //~ ERROR does not live long enough
| ^^^^^ creates a temporary which is freed while still in use
| ------------ ^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
...
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0716]: temporary value dropped while borrowed
--> $DIR/dont_promote_unstable_const_fn.rs:33:26
|
LL | let x: &'static _ = &std::time::Duration::from_millis(42).subsec_millis();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| ---------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
LL | //~^ ERROR does not live long enough
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error: aborting due to 4 previous errors
......
src/test/ui/consts/const-eval/dont_promote_unstable_const_fn_cross_crate.nll.stderr
浏览文件 @ 31b97f78
......@@ -2,22 +2,22 @@ error[E0716]: temporary value dropped while borrowed
--> $DIR/dont_promote_unstable_const_fn_cross_crate.rs:18:28
|
LL | let _: &'static u32 = &foo(); //~ ERROR does not live long enough
| ^^^^^ creates a temporary which is freed while still in use
| ------------ ^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
LL | let _x: &'static u32 = &foo(); //~ ERROR does not live long enough
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0716]: temporary value dropped while borrowed
--> $DIR/dont_promote_unstable_const_fn_cross_crate.rs:19:29
|
LL | let _x: &'static u32 = &foo(); //~ ERROR does not live long enough
| ^^^^^ creates a temporary which is freed while still in use
| ------------ ^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error: aborting due to 2 previous errors
......
src/test/ui/consts/const-eval/promoted_const_fn_fail.nll.stderr
浏览文件 @ 31b97f78
......@@ -2,12 +2,12 @@ error[E0716]: temporary value dropped while borrowed
--> $DIR/promoted_const_fn_fail.rs:30:27
|
LL | let x: &'static u8 = &(bar() + 1); //~ ERROR does not live long enough
| ^^^^^^^^^^^ creates a temporary which is freed while still in use
| ----------- ^^^^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
...
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error: aborting due to previous error
......
src/test/ui/consts/const-eval/promoted_raw_ptr_ops.nll.stderr
浏览文件 @ 31b97f78
......@@ -2,44 +2,44 @@ error[E0716]: temporary value dropped while borrowed
--> $DIR/promoted_raw_ptr_ops.rs:14:29
|
LL | let x: &'static bool = &(42 as *const i32 == 43 as *const i32);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| ------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
...
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0716]: temporary value dropped while borrowed
--> $DIR/promoted_raw_ptr_ops.rs:16:30
|
LL | let y: &'static usize = &(&1 as *const i32 as usize + 1); //~ ERROR does not live long enough
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| -------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
...
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0716]: temporary value dropped while borrowed
--> $DIR/promoted_raw_ptr_ops.rs:17:28
|
LL | let z: &'static i32 = &(unsafe { *(42 as *const i32) }); //~ ERROR does not live long enough
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| ------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
LL | let a: &'static bool = &(main as fn() == main as fn()); //~ ERROR does not live long enough
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0716]: temporary value dropped while borrowed
--> $DIR/promoted_raw_ptr_ops.rs:18:29
|
LL | let a: &'static bool = &(main as fn() == main as fn()); //~ ERROR does not live long enough
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| ------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error: aborting due to 4 previous errors
......
src/test/ui/consts/const-eval/transmute-const-promotion.nll.stderr
浏览文件 @ 31b97f78
......@@ -2,12 +2,12 @@ error[E0716]: temporary value dropped while borrowed
--> $DIR/transmute-const-promotion.rs:16:37
|
LL | let x: &'static u32 = unsafe { &mem::transmute(3.0f32) };
| ^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| ------------ ^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
LL | //~^ ERROR value does not live long enough
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error: aborting due to previous error
......
src/test/ui/consts/const-eval/union_promotion.nll.stderr
浏览文件 @ 31b97f78
......@@ -2,14 +2,14 @@ error[E0716]: temporary value dropped while borrowed
--> $DIR/union_promotion.rs:19:29
|
LL | let x: &'static bool = &unsafe { //~ borrowed value does not live long enough
| _____________________________^
| ____________-------------____^
| | |
| | type annotation requires that borrow lasts for `'static`
LL | | Foo { a: &1 }.b == Foo { a: &2 }.b
LL | | };
| |_____^ creates a temporary which is freed while still in use
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error: aborting due to previous error
......
src/test/ui/consts/const-int-conversion.nll.stderr
浏览文件 @ 31b97f78
......@@ -2,78 +2,78 @@ error[E0716]: temporary value dropped while borrowed
--> $DIR/const-int-conversion.rs:14:28
|
LL | let x: &'static i32 = &(5_i32.reverse_bits());
| ^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| ------------ ^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
...
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0716]: temporary value dropped while borrowed
--> $DIR/const-int-conversion.rs:16:28
|
LL | let y: &'static i32 = &(i32::from_be_bytes([0x12, 0x34, 0x56, 0x78]));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| ------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
...
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0716]: temporary value dropped while borrowed
--> $DIR/const-int-conversion.rs:18:28
|
LL | let z: &'static i32 = &(i32::from_le_bytes([0x12, 0x34, 0x56, 0x78]));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| ------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
...
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0716]: temporary value dropped while borrowed
--> $DIR/const-int-conversion.rs:20:28
|
LL | let a: &'static i32 = &(i32::from_be(i32::from_ne_bytes([0x80, 0, 0, 0])));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| ------------ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
...
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0716]: temporary value dropped while borrowed
--> $DIR/const-int-conversion.rs:22:29
|
LL | let b: &'static [u8] = &(0x12_34_56_78_i32.to_be_bytes());
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| ------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
...
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0716]: temporary value dropped while borrowed
--> $DIR/const-int-conversion.rs:24:29
|
LL | let c: &'static [u8] = &(0x12_34_56_78_i32.to_le_bytes());
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| ------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
...
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0716]: temporary value dropped while borrowed
--> $DIR/const-int-conversion.rs:26:29
|
LL | let d: &'static [u8] = &(i32::min_value().to_be().to_ne_bytes());
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| ------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
LL | //~^ ERROR does not live long enough
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error: aborting due to 7 previous errors
......
src/test/ui/consts/const-int-overflowing.nll.stderr
浏览文件 @ 31b97f78
......@@ -2,33 +2,33 @@ error[E0716]: temporary value dropped while borrowed
--> $DIR/const-int-overflowing.rs:12:36
|
LL | let x: &'static (i32, bool) = &(5_i32.overflowing_add(3)); //~ ERROR does not live long enough
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| -------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
...
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0716]: temporary value dropped while borrowed
--> $DIR/const-int-overflowing.rs:13:36
|
LL | let y: &'static (i32, bool) = &(5_i32.overflowing_sub(3)); //~ ERROR does not live long enough
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| -------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
LL | let z: &'static (i32, bool) = &(5_i32.overflowing_mul(3)); //~ ERROR does not live long enough
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0716]: temporary value dropped while borrowed
--> $DIR/const-int-overflowing.rs:14:36
|
LL | let z: &'static (i32, bool) = &(5_i32.overflowing_mul(3)); //~ ERROR does not live long enough
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| -------------------- ^^^^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error: aborting due to 3 previous errors
......
src/test/ui/consts/const-int-rotate.nll.stderr
浏览文件 @ 31b97f78
......@@ -2,22 +2,22 @@ error[E0716]: temporary value dropped while borrowed
--> $DIR/const-int-rotate.rs:12:28
|
LL | let x: &'static i32 = &(5_i32.rotate_left(3)); //~ ERROR does not live long enough
| ^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| ------------ ^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
LL | let y: &'static i32 = &(5_i32.rotate_right(3)); //~ ERROR does not live long enough
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0716]: temporary value dropped while borrowed
--> $DIR/const-int-rotate.rs:13:28
|
LL | let y: &'static i32 = &(5_i32.rotate_right(3)); //~ ERROR does not live long enough
| ^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| ------------ ^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error: aborting due to 2 previous errors
......
src/test/ui/consts/const-int-sign.nll.stderr
浏览文件 @ 31b97f78
......@@ -2,22 +2,22 @@ error[E0716]: temporary value dropped while borrowed
--> $DIR/const-int-sign.rs:12:29
|
LL | let x: &'static bool = &(5_i32.is_negative()); //~ ERROR does not live long enough
| ^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| ------------- ^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
LL | let y: &'static bool = &(5_i32.is_positive()); //~ ERROR does not live long enough
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0716]: temporary value dropped while borrowed
--> $DIR/const-int-sign.rs:13:29
|
LL | let y: &'static bool = &(5_i32.is_positive()); //~ ERROR does not live long enough
| ^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| ------------- ^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error: aborting due to 2 previous errors
......
src/test/ui/consts/const-int-wrapping.nll.stderr
浏览文件 @ 31b97f78
......@@ -2,55 +2,55 @@ error[E0716]: temporary value dropped while borrowed
--> $DIR/const-int-wrapping.rs:12:28
|
LL | let x: &'static i32 = &(5_i32.wrapping_add(3)); //~ ERROR does not live long enough
| ^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| ------------ ^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
...
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0716]: temporary value dropped while borrowed
--> $DIR/const-int-wrapping.rs:13:28
|
LL | let y: &'static i32 = &(5_i32.wrapping_sub(3)); //~ ERROR does not live long enough
| ^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| ------------ ^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
...
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0716]: temporary value dropped while borrowed
--> $DIR/const-int-wrapping.rs:14:28
|
LL | let z: &'static i32 = &(5_i32.wrapping_mul(3)); //~ ERROR does not live long enough
| ^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| ------------ ^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
...
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0716]: temporary value dropped while borrowed
--> $DIR/const-int-wrapping.rs:15:28
|
LL | let a: &'static i32 = &(5_i32.wrapping_shl(3)); //~ ERROR does not live long enough
| ^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| ------------ ^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
LL | let b: &'static i32 = &(5_i32.wrapping_shr(3)); //~ ERROR does not live long enough
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0716]: temporary value dropped while borrowed
--> $DIR/const-int-wrapping.rs:16:28
|
LL | let b: &'static i32 = &(5_i32.wrapping_shr(3)); //~ ERROR does not live long enough
| ^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| ------------ ^^^^^^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error: aborting due to 5 previous errors
......
src/test/ui/consts/issue-54224.stderr
浏览文件 @ 31b97f78
......@@ -2,21 +2,21 @@ error[E0716]: temporary value dropped while borrowed
--> $DIR/issue-54224.rs:3:39
|
LL | const FOO: Option<&[[u8; 3]]> = Some(&[*b"foo"]); //~ ERROR temporary value dropped while borrowed
| ^^^^^^^^^- temporary value is freed at the end of this statement
| |
| creates a temporary which is freed while still in use
|
= note: borrowed value must be valid for the static lifetime...
| ------^^^^^^^^^-
| | | |
| | | temporary value is freed at the end of this statement
| | creates a temporary which is freed while still in use
| using this value as a constant requires that borrow lasts for `'static`
error[E0716]: temporary value dropped while borrowed
--> $DIR/issue-54224.rs:11:57
|
LL | pub const Z: Cow<'static, [ [u8; 3] ]> = Cow::Borrowed(&[*b"ABC"]);
| ^^^^^^^^^- temporary value is freed at the end of this statement
| |
| creates a temporary which is freed while still in use
|
= note: borrowed value must be valid for the static lifetime...
| ---------------^^^^^^^^^-
| | | |
| | | temporary value is freed at the end of this statement
| | creates a temporary which is freed while still in use
| using this value as a constant requires that borrow lasts for `'static`
error: aborting due to 2 previous errors
......
src/test/ui/consts/min_const_fn/min_const_fn.nll.stderr
浏览文件 @ 31b97f78
......@@ -190,15 +190,15 @@ error: trait bounds other than `Sized` on const fn parameters are unstable
LL | const fn no_dyn_trait_ret() -> &'static dyn std::fmt::Debug { &() }
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
warning[E0716]: temporary value dropped while borrowed
--> $DIR/min_const_fn.rs:142:64
warning[E0515]: cannot return reference to temporary value
--> $DIR/min_const_fn.rs:142:63
|
LL | const fn no_dyn_trait_ret() -> &'static dyn std::fmt::Debug { &() }
| ^^ - temporary value is freed at the end of this statement
| |
| creates a temporary which is freed while still in use
| ^--
| ||
| |temporary value created here
| returns a reference to data owned by the current function
|
= note: borrowed value must be valid for the static lifetime...
= warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
It represents potential unsoundness in your code.
This warning will become a hard error in the future.
......@@ -223,5 +223,5 @@ LL | const fn no_fn_ptrs2() -> fn() { fn foo() {} foo }
error: aborting due to 35 previous errors
Some errors occurred: E0493, E0716.
Some errors occurred: E0493, E0515.
For more information about an error, try `rustc --explain E0493`.
src/test/ui/consts/min_const_fn/min_const_fn_dyn.nll.stderr
浏览文件 @ 31b97f78
......@@ -14,11 +14,11 @@ warning[E0716]: temporary value dropped while borrowed
--> $DIR/min_const_fn_dyn.rs:22:67
|
LL | const fn no_inner_dyn_trait_ret() -> Hide { Hide(HasDyn { field: &0 }) }
| ^ - temporary value is freed at the end of this statement
| |
| creates a temporary which is freed while still in use
| -^ - temporary value is freed at the end of this statement
| ||
| |creates a temporary which is freed while still in use
| cast requires that borrow lasts for `'static`
|
= note: borrowed value must be valid for the static lifetime...
= warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
It represents potential unsoundness in your code.
This warning will become a hard error in the future.
......
src/test/ui/consts/min_const_fn/promotion.nll.stderr
浏览文件 @ 31b97f78
......@@ -2,66 +2,66 @@ error[E0716]: temporary value dropped while borrowed
--> $DIR/promotion.rs:11:27
|
LL | let x: &'static () = &foo1(); //~ ERROR does not live long enough
| ^^^^^^ creates a temporary which is freed while still in use
| ----------- ^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
...
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0716]: temporary value dropped while borrowed
--> $DIR/promotion.rs:12:28
|
LL | let y: &'static i32 = &foo2(42); //~ ERROR does not live long enough
| ^^^^^^^^ creates a temporary which is freed while still in use
| ------------ ^^^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
...
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0716]: temporary value dropped while borrowed
--> $DIR/promotion.rs:13:28
|
LL | let z: &'static i32 = &foo3(); //~ ERROR does not live long enough
| ^^^^^^ creates a temporary which is freed while still in use
| ------------ ^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
...
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0716]: temporary value dropped while borrowed
--> $DIR/promotion.rs:14:34
|
LL | let a: &'static Cell<i32> = &foo4(); //~ ERROR does not live long enough
| ^^^^^^ creates a temporary which is freed while still in use
| ------------------ ^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
...
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0716]: temporary value dropped while borrowed
--> $DIR/promotion.rs:15:42
|
LL | let a: &'static Option<Cell<i32>> = &foo5(); //~ ERROR does not live long enough
| ^^^^^^ creates a temporary which is freed while still in use
| -------------------------- ^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
LL | let a: &'static Option<Cell<i32>> = &foo6(); //~ ERROR does not live long enough
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error[E0716]: temporary value dropped while borrowed
--> $DIR/promotion.rs:16:42
|
LL | let a: &'static Option<Cell<i32>> = &foo6(); //~ ERROR does not live long enough
| ^^^^^^ creates a temporary which is freed while still in use
| -------------------------- ^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error: aborting due to 6 previous errors
......
src/test/ui/dropck/drop-with-active-borrows-2.nll.stderr
浏览文件 @ 31b97f78
error[E0597]: `raw_lines` does not live long enough
error[E0515]: cannot return value referencing local variable `raw_lines`
--> $DIR/drop-with-active-borrows-2.rs:13:5
|
LL | raw_lines.iter().map(|l| l.trim()).collect()
| ^^^^^^^^^ borrowed value does not live long enough
LL | //~^ ERROR `raw_lines` does not live long enough
LL | }
| - `raw_lines` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 11:24...
--> $DIR/drop-with-active-borrows-2.rs:11:24
|
LL | fn read_lines_borrowed<'a>() -> Vec<&'a str> {
| ^^
| ---------^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| |
| returns a value referencing data owned by the current function
| `raw_lines` is borrowed here
error: aborting due to previous error
For more information about this error, try `rustc --explain E0597`.
For more information about this error, try `rustc --explain E0515`.
src/test/ui/dropck/dropck_trait_cycle_checked.nll.stderr
浏览文件 @ 31b97f78
error[E0597]: `o2` does not live long enough
--> $DIR/dropck_trait_cycle_checked.rs:121:13
|
LL | let (o1, o2, o3): (Box<Obj>, Box<Obj>, Box<Obj>) = (O::new(), O::new(), O::new());
| -------- cast requires that `o2` is borrowed for `'static`
LL | o1.set0(&o2); //~ ERROR `o2` does not live long enough
| ^^^ borrowed value does not live long enough
...
LL | }
| - `o2` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
error[E0597]: `o3` does not live long enough
--> $DIR/dropck_trait_cycle_checked.rs:122:13
|
LL | let (o1, o2, o3): (Box<Obj>, Box<Obj>, Box<Obj>) = (O::new(), O::new(), O::new());
| -------- cast requires that `o3` is borrowed for `'static`
LL | o1.set0(&o2); //~ ERROR `o2` does not live long enough
LL | o1.set1(&o3); //~ ERROR `o3` does not live long enough
| ^^^ borrowed value does not live long enough
...
LL | }
| - `o3` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
error[E0597]: `o2` does not live long enough
--> $DIR/dropck_trait_cycle_checked.rs:123:13
|
LL | let (o1, o2, o3): (Box<Obj>, Box<Obj>, Box<Obj>) = (O::new(), O::new(), O::new());
| -------- cast requires that `o2` is borrowed for `'static`
...
LL | o2.set0(&o2); //~ ERROR `o2` does not live long enough
| ^^^ borrowed value does not live long enough
...
LL | }
| - `o2` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
error[E0597]: `o3` does not live long enough
--> $DIR/dropck_trait_cycle_checked.rs:124:13
|
LL | let (o1, o2, o3): (Box<Obj>, Box<Obj>, Box<Obj>) = (O::new(), O::new(), O::new());
| -------- cast requires that `o3` is borrowed for `'static`
...
LL | o2.set1(&o3); //~ ERROR `o3` does not live long enough
| ^^^ borrowed value does not live long enough
...
LL | }
| - `o3` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
error[E0597]: `o1` does not live long enough
--> $DIR/dropck_trait_cycle_checked.rs:125:13
|
LL | let (o1, o2, o3): (Box<Obj>, Box<Obj>, Box<Obj>) = (O::new(), O::new(), O::new());
| -------- cast requires that `o1` is borrowed for `'static`
...
LL | o3.set0(&o1); //~ ERROR `o1` does not live long enough
| ^^^ borrowed value does not live long enough
LL | o3.set1(&o2); //~ ERROR `o2` does not live long enough
LL | }
| - `o1` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
error[E0597]: `o2` does not live long enough
--> $DIR/dropck_trait_cycle_checked.rs:126:13
|
LL | let (o1, o2, o3): (Box<Obj>, Box<Obj>, Box<Obj>) = (O::new(), O::new(), O::new());
| -------- cast requires that `o2` is borrowed for `'static`
...
LL | o3.set1(&o2); //~ ERROR `o2` does not live long enough
| ^^^ borrowed value does not live long enough
LL | }
| - `o2` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
error: aborting due to 6 previous errors
......
src/test/ui/dst/dst-bad-coerce3.nll.stderr
浏览文件 @ 31b97f78
error[E0597]: `f1` does not live long enough
--> $DIR/dst-bad-coerce3.rs:26:32
|
LL | fn baz<'a>() {
| -- lifetime `'a` defined here
...
LL | let f2: &Fat<[isize; 3]> = &f1; //~ ERROR `f1` does not live long enough
| ^^^ borrowed value does not live long enough
LL | let f3: &'a Fat<[isize]> = f2;
| ---------------- type annotation requires that `f1` is borrowed for `'a`
...
LL | }
| - `f1` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 23:8...
--> $DIR/dst-bad-coerce3.rs:23:8
|
LL | fn baz<'a>() {
| ^^
error[E0597]: `f1` does not live long enough
--> $DIR/dst-bad-coerce3.rs:31:25
|
LL | fn baz<'a>() {
| -- lifetime `'a` defined here
...
LL | let f2: &Fat<Foo> = &f1; //~ ERROR `f1` does not live long enough
| ^^^ borrowed value does not live long enough
LL | let f3: &'a Fat<Bar> = f2;
| ------------ type annotation requires that `f1` is borrowed for `'a`
...
LL | }
| - `f1` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 23:8...
--> $DIR/dst-bad-coerce3.rs:23:8
|
LL | fn baz<'a>() {
| ^^
error[E0597]: `f1` does not live long enough
--> $DIR/dst-bad-coerce3.rs:36:30
|
LL | fn baz<'a>() {
| -- lifetime `'a` defined here
...
LL | let f2: &([isize; 3],) = &f1; //~ ERROR `f1` does not live long enough
| ^^^ borrowed value does not live long enough
LL | let f3: &'a ([isize],) = f2;
| -------------- type annotation requires that `f1` is borrowed for `'a`
...
LL | }
| - `f1` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 23:8...
--> $DIR/dst-bad-coerce3.rs:23:8
|
LL | fn baz<'a>() {
| ^^
error[E0597]: `f1` does not live long enough
--> $DIR/dst-bad-coerce3.rs:41:23
|
LL | fn baz<'a>() {
| -- lifetime `'a` defined here
...
LL | let f2: &(Foo,) = &f1; //~ ERROR `f1` does not live long enough
| ^^^ borrowed value does not live long enough
LL | let f3: &'a (Bar,) = f2;
| ---------- type annotation requires that `f1` is borrowed for `'a`
LL | }
| - `f1` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 23:8...
--> $DIR/dst-bad-coerce3.rs:23:8
|
LL | fn baz<'a>() {
| ^^
error: aborting due to 4 previous errors
......
src/test/ui/generator/generator-region-requirements.nll.stderr
浏览文件 @ 31b97f78
error[E0621]: explicit lifetime required in the type of `x`
--> $DIR/generator-region-requirements.rs:11:9
--> $DIR/generator-region-requirements.rs:15:51
|
LL | fn dangle(x: &mut i32) -> &'static mut i32 {
| -------- help: add explicit lifetime `'static` to the type of `x`: `&'static mut i32`
...
LL | x
| ^ lifetime `'static` required
LL | GeneratorState::Complete(c) => return c,
| ^ lifetime `'static` required
error: aborting due to previous error
......
src/test/ui/generator/ref-escapes-but-not-over-yield.nll.stderr
浏览文件 @ 31b97f78
error[E0597]: `b` does not live long enough
--> $DIR/ref-escapes-but-not-over-yield.rs:24:13
error[E0521]: borrowed data escapes outside of generator
--> $DIR/ref-escapes-but-not-over-yield.rs:24:9
|
LL | let mut a = &3;
| ----- `a` is declared here, outside of the generator body
...
LL | a = &b;
| ^^ borrowed value does not live long enough
LL | //~^ ERROR `b` does not live long enough
LL | };
| - `b` dropped here while still borrowed
| ^^^^--
| | |
| | borrow is only valid in the generator body
| reference to `b` escapes the generator body here
error: aborting due to previous error
For more information about this error, try `rustc --explain E0597`.
For more information about this error, try `rustc --explain E0521`.
src/test/ui/issues/issue-11681.nll.stderr
浏览文件 @ 31b97f78
error[E0716]: temporary value dropped while borrowed
--> $DIR/issue-11681.rs:22:20
error[E0515]: cannot return value referencing temporary value
--> $DIR/issue-11681.rs:23:10
|
LL | let testValue = &Test; //~ ERROR borrowed value does not live long enough
| ^^^^ creates a temporary which is freed while still in use
| ---- temporary value created here
LL | return testValue;
LL | }
| - temporary value is freed at the end of this statement
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 21:15...
--> $DIR/issue-11681.rs:21:15
|
LL | fn createTest<'a>() -> &'a Test {
| ^^
| ^^^^^^^^^ returns a value referencing data owned by the current function
error: aborting due to previous error
For more information about this error, try `rustc --explain E0716`.
For more information about this error, try `rustc --explain E0515`.
src/test/ui/issues/issue-12470.nll.stderr
浏览文件 @ 31b97f78
error[E0597]: `*b` does not live long enough
--> $DIR/issue-12470.rs:38:18
error[E0515]: cannot return value referencing local data `*b`
--> $DIR/issue-12470.rs:39:5
|
LL | let bb: &B = &*b; //~ ERROR does not live long enough
| ^^^ borrowed value does not live long enough
| --- `*b` is borrowed here
LL | make_a(bb)
LL | }
| - `*b` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 36:16...
--> $DIR/issue-12470.rs:36:16
|
LL | fn make_make_a<'a>() -> A<'a> {
| ^^
| ^^^^^^^^^^ returns a value referencing data owned by the current function
error: aborting due to previous error
For more information about this error, try `rustc --explain E0597`.
For more information about this error, try `rustc --explain E0515`.
src/test/ui/issues/issue-13497-2.nll.stderr
浏览文件 @ 31b97f78
error[E0597]: `rawLines` does not live long enough
error[E0515]: cannot return value referencing local variable `rawLines`
--> $DIR/issue-13497-2.rs:13:5
|
LL | rawLines //~ ERROR `rawLines` does not live long enough
| ^^^^^^^^ borrowed value does not live long enough
LL | .iter().map(|l| l.trim()).collect()
LL | }
| - `rawLines` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 11:24...
--> $DIR/issue-13497-2.rs:11:24
|
LL | fn read_lines_borrowed<'a>() -> Vec<&'a str> {
| ^^
LL | rawLines //~ ERROR `rawLines` does not live long enough
| ^-------
| |
| _____`rawLines` is borrowed here
| |
LL | | .iter().map(|l| l.trim()).collect()
| |___________________________________________^ returns a value referencing data owned by the current function
error: aborting due to previous error
For more information about this error, try `rustc --explain E0597`.
For more information about this error, try `rustc --explain E0515`.
src/test/ui/issues/issue-17545.nll.stderr
浏览文件 @ 31b97f78
error[E0716]: temporary value dropped while borrowed
--> $DIR/issue-17545.rs:17:10
|
LL | &id(()), //~ ERROR borrowed value does not live long enough
| ^^^^^^ creates a temporary which is freed while still in use
LL | ));
| - temporary value is freed at the end of this statement
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 15:12...
--> $DIR/issue-17545.rs:15:12
|
LL | pub fn foo<'a, F: Fn(&'a ())>(bar: F) {
| ^^
LL | pub fn foo<'a, F: Fn(&'a ())>(bar: F) {
| -- lifetime `'a` defined here
LL | / bar.call((
LL | | &id(()), //~ ERROR borrowed value does not live long enough
| | ^^^^^^ creates a temporary which is freed while still in use
LL | | ));
| | -- temporary value is freed at the end of this statement
| |______|
| argument requires that borrow lasts for `'a`
error: aborting due to previous error
......
src/test/ui/issues/issue-17718-constants-not-static.nll.stderr
浏览文件 @ 31b97f78
error[E0716]: temporary value dropped while borrowed
--> $DIR/issue-17718-constants-not-static.rs:15:31
error[E0515]: cannot return reference to temporary value
--> $DIR/issue-17718-constants-not-static.rs:15:30
|
LL | fn foo() -> &'static usize { &id(FOO) }
| ^^^^^^^ - temporary value is freed at the end of this statement
| |
| creates a temporary which is freed while still in use
|
= note: borrowed value must be valid for the static lifetime...
| ^-------
| ||
| |temporary value created here
| returns a reference to data owned by the current function
error: aborting due to previous error
For more information about this error, try `rustc --explain E0716`.
For more information about this error, try `rustc --explain E0515`.
src/test/ui/issues/issue-18118.nll.stderr
浏览文件 @ 31b97f78
......@@ -54,12 +54,13 @@ error[E0597]: `p` does not live long enough
--> $DIR/issue-18118.rs:18:9
|
LL | &p //~ ERROR `p` does not live long enough
| ^^ borrowed value does not live long enough
| ^^
| |
| borrowed value does not live long enough
| using this value as a constant requires that `p` is borrowed for `'static`
LL | //~^ ERROR let bindings in constants are unstable
LL | };
| - `p` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
error: aborting due to 6 previous errors
......
src/test/ui/issues/issue-27592.nll.stderr
浏览文件 @ 31b97f78
error[E0716]: temporary value dropped while borrowed
--> $DIR/issue-27592.rs:26:27
error[E0515]: cannot return value referencing temporary value
--> $DIR/issue-27592.rs:26:14
|
LL | write(|| format_args!("{}", String::from("Hello world")));
| ^^^^ - temporary value is freed at the end of this statement
| |
| creates a temporary which is freed while still in use
| ^^^^^^^^^^^^^^^^^^^---------------------------^
| | |
| | temporary value created here
| returns a value referencing data owned by the current function
error[E0716]: temporary value dropped while borrowed
--> $DIR/issue-27592.rs:26:33
error[E0515]: cannot return value referencing temporary value
--> $DIR/issue-27592.rs:26:14
|
LL | write(|| format_args!("{}", String::from("Hello world")));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^- temporary value is freed at the end of this statement
| |
| creates a temporary which is freed while still in use
| ^^^^^^^^^^^^^----^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| | |
| | temporary value created here
| returns a value referencing data owned by the current function
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0716`.
For more information about this error, try `rustc --explain E0515`.
src/test/ui/issues/issue-30438-a.nll.stderr
浏览文件 @ 31b97f78
error[E0716]: temporary value dropped while borrowed
--> $DIR/issue-30438-a.rs:22:17
error[E0515]: cannot return reference to temporary value
--> $DIR/issue-30438-a.rs:22:16
|
LL | return &Test { s: &self.s};
| ^^^^^^^^^^^^^^^^^^- temporary value is freed at the end of this statement
| |
| creates a temporary which is freed while still in use
|
note: borrowed value must be valid for the anonymous lifetime #1 defined on the method body at 21:5...
--> $DIR/issue-30438-a.rs:21:5
|
LL | / fn index(&self, _: usize) -> &Self::Output {
LL | | return &Test { s: &self.s};
LL | | //~^ ERROR: borrowed value does not live long enough
LL | | }
| |_____^
| ^------------------
| ||
| |temporary value created here
| returns a reference to data owned by the current function
error: aborting due to previous error
For more information about this error, try `rustc --explain E0716`.
For more information about this error, try `rustc --explain E0515`.
src/test/ui/issues/issue-30438-b.nll.stderr
浏览文件 @ 31b97f78
error[E0716]: temporary value dropped while borrowed
--> $DIR/issue-30438-b.rs:23:10
error[E0515]: cannot return reference to temporary value
--> $DIR/issue-30438-b.rs:23:9
|
LL | &Test { s: &self.s}
| ^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
LL | //~^ ERROR: borrowed value does not live long enough
LL | }
| - temporary value is freed at the end of this statement
|
note: borrowed value must be valid for the anonymous lifetime #1 defined on the method body at 22:5...
--> $DIR/issue-30438-b.rs:22:5
|
LL | / fn index(&self, _: usize) -> &Self::Output {
LL | | &Test { s: &self.s}
LL | | //~^ ERROR: borrowed value does not live long enough
LL | | }
| |_____^
| ^------------------
| ||
| |temporary value created here
| returns a reference to data owned by the current function
error: aborting due to previous error
For more information about this error, try `rustc --explain E0716`.
For more information about this error, try `rustc --explain E0515`.
src/test/ui/issues/issue-30438-c.nll.stderr
浏览文件 @ 31b97f78
error[E0597]: `x` does not live long enough
error[E0515]: cannot return reference to local variable `x`
--> $DIR/issue-30438-c.rs:19:5
|
LL | fn silly<'y, 'z>(_s: &'y Test<'z>) -> &'y <Test<'z> as Trait>::Out where 'z: 'static {
| -- -- also has lifetime `'y`
| |
| has lifetime `'y`
LL | let x = Test { s: "this cannot last" };
LL | &x
| ^^ `x` would have to be valid for `'y`...
LL | //~^ ERROR: `x` does not live long enough
LL | }
| - ...but `x` will be dropped here, when the function `silly` returns
|
= help: use data from the highlighted arguments which match the `'y` lifetime of the return type
= note: functions cannot return a borrow to data owned within the function's scope, functions can only return borrows to data passed as arguments
= note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch04-02-references-and-borrowing.html#dangling-references>
| ^^ returns a reference to data owned by the current function
error: aborting due to previous error
For more information about this error, try `rustc --explain E0597`.
For more information about this error, try `rustc --explain E0515`.
src/test/ui/issues/issue-4335.nll.stderr
浏览文件 @ 31b97f78
......@@ -15,24 +15,25 @@ LL | id(Box::new(|| *v))
| cannot move out of `*v` which is behind a `&` reference
| cannot move
error[E0597]: `v` does not live long enough
--> $DIR/issue-4335.rs:16:21
error[E0373]: closure may outlive the current function, but it borrows `v`, which is owned by the current function
--> $DIR/issue-4335.rs:16:17
|
LL | id(Box::new(|| *v))
| -- ^ borrowed value does not live long enough
| ^^ - `v` is borrowed here
| |
| value captured here
...
LL | }
| - `v` dropped here while still borrowed
| may outlive borrowed value `v`
|
note: borrowed value must be valid for the lifetime 'r as defined on the function body at 15:6...
--> $DIR/issue-4335.rs:15:6
note: closure is returned here
--> $DIR/issue-4335.rs:16:5
|
LL | fn f<'r, T>(v: &'r T) -> Box<FnMut() -> T + 'r> {
| ^^
LL | id(Box::new(|| *v))
| ^^^^^^^^^^^^^^^^^^^
help: to force the closure to take ownership of `v` (and any other referenced variables), use the `move` keyword
|
LL | id(Box::new(move || *v))
| ^^^^^^^
error: aborting due to 3 previous errors
Some errors occurred: E0507, E0597.
For more information about an error, try `rustc --explain E0507`.
Some errors occurred: E0373, E0507.
For more information about an error, try `rustc --explain E0373`.
src/test/ui/issues/issue-44373.nll.stderr
浏览文件 @ 31b97f78
......@@ -2,11 +2,11 @@ error[E0716]: temporary value dropped while borrowed
--> $DIR/issue-44373.rs:15:42
|
LL | let _val: &'static [&'static u32] = &[&FOO]; //~ ERROR borrowed value does not live long enough
| ^^^^^^ creates a temporary which is freed while still in use
| ----------------------- ^^^^^^ creates a temporary which is freed while still in use
| |
| type annotation requires that borrow lasts for `'static`
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error: aborting due to previous error
......
src/test/ui/issues/issue-45696-scribble-on-boxed-borrow.migrate.stderr
浏览文件 @ 31b97f78
warning[E0713]: borrow may still be in use when destructor runs
--> $DIR/issue-45696-scribble-on-boxed-borrow.rs:63:5
|
LL | fn scribbled<'a>(s: Scribble<'a>) -> &'a mut u32 {
| -- lifetime `'a` defined here
LL | &mut *s.0 //[nll]~ ERROR borrow may still be in use when destructor runs [E0713]
| ^^^^^^^^^
| ^^^^^^^^^ returning this value requires that `*s.0` is borrowed for `'a`
...
LL | }
| - here, drop of `s` needs exclusive access to `*s.0`, because the type `Scribble<'_>` implements the `Drop` trait
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 62:14...
--> $DIR/issue-45696-scribble-on-boxed-borrow.rs:62:14
|
LL | fn scribbled<'a>(s: Scribble<'a>) -> &'a mut u32 {
| ^^
= warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
It represents potential unsoundness in your code.
This warning will become a hard error in the future.
......@@ -19,17 +16,14 @@ LL | fn scribbled<'a>(s: Scribble<'a>) -> &'a mut u32 {
warning[E0713]: borrow may still be in use when destructor runs
--> $DIR/issue-45696-scribble-on-boxed-borrow.rs:73:5
|
LL | fn boxed_scribbled<'a>(s: Box<Scribble<'a>>) -> &'a mut u32 {
| -- lifetime `'a` defined here
LL | &mut *(*s).0 //[nll]~ ERROR borrow may still be in use when destructor runs [E0713]
| ^^^^^^^^^^^^
| ^^^^^^^^^^^^ returning this value requires that `*s.0` is borrowed for `'a`
...
LL | }
| - here, drop of `s` needs exclusive access to `*s.0`, because the type `Scribble<'_>` implements the `Drop` trait
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 72:20...
--> $DIR/issue-45696-scribble-on-boxed-borrow.rs:72:20
|
LL | fn boxed_scribbled<'a>(s: Box<Scribble<'a>>) -> &'a mut u32 {
| ^^
= warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
It represents potential unsoundness in your code.
This warning will become a hard error in the future.
......@@ -37,17 +31,14 @@ LL | fn boxed_scribbled<'a>(s: Box<Scribble<'a>>) -> &'a mut u32 {
warning[E0713]: borrow may still be in use when destructor runs
--> $DIR/issue-45696-scribble-on-boxed-borrow.rs:83:5
|
LL | fn boxed_boxed_scribbled<'a>(s: Box<Box<Scribble<'a>>>) -> &'a mut u32 {
| -- lifetime `'a` defined here
LL | &mut *(**s).0 //[nll]~ ERROR borrow may still be in use when destructor runs [E0713]
| ^^^^^^^^^^^^^
| ^^^^^^^^^^^^^ returning this value requires that `*s.0` is borrowed for `'a`
...
LL | }
| - here, drop of `s` needs exclusive access to `*s.0`, because the type `Scribble<'_>` implements the `Drop` trait
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 82:26...
--> $DIR/issue-45696-scribble-on-boxed-borrow.rs:82:26
|
LL | fn boxed_boxed_scribbled<'a>(s: Box<Box<Scribble<'a>>>) -> &'a mut u32 {
| ^^
= warning: This error has been downgraded to a warning for backwards compatibility with previous releases.
It represents potential unsoundness in your code.
This warning will become a hard error in the future.
......
src/test/ui/issues/issue-45696-scribble-on-boxed-borrow.nll.stderr
浏览文件 @ 31b97f78
error[E0713]: borrow may still be in use when destructor runs
--> $DIR/issue-45696-scribble-on-boxed-borrow.rs:63:5
|
LL | fn scribbled<'a>(s: Scribble<'a>) -> &'a mut u32 {
| -- lifetime `'a` defined here
LL | &mut *s.0 //[nll]~ ERROR borrow may still be in use when destructor runs [E0713]
| ^^^^^^^^^
| ^^^^^^^^^ returning this value requires that `*s.0` is borrowed for `'a`
...
LL | }
| - here, drop of `s` needs exclusive access to `*s.0`, because the type `Scribble<'_>` implements the `Drop` trait
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 62:14...
--> $DIR/issue-45696-scribble-on-boxed-borrow.rs:62:14
|
LL | fn scribbled<'a>(s: Scribble<'a>) -> &'a mut u32 {
| ^^
error[E0713]: borrow may still be in use when destructor runs
--> $DIR/issue-45696-scribble-on-boxed-borrow.rs:73:5
|
LL | fn boxed_scribbled<'a>(s: Box<Scribble<'a>>) -> &'a mut u32 {
| -- lifetime `'a` defined here
LL | &mut *(*s).0 //[nll]~ ERROR borrow may still be in use when destructor runs [E0713]
| ^^^^^^^^^^^^
| ^^^^^^^^^^^^ returning this value requires that `*s.0` is borrowed for `'a`
...
LL | }
| - here, drop of `s` needs exclusive access to `*s.0`, because the type `Scribble<'_>` implements the `Drop` trait
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 72:20...
--> $DIR/issue-45696-scribble-on-boxed-borrow.rs:72:20
|
LL | fn boxed_scribbled<'a>(s: Box<Scribble<'a>>) -> &'a mut u32 {
| ^^
error[E0713]: borrow may still be in use when destructor runs
--> $DIR/issue-45696-scribble-on-boxed-borrow.rs:83:5
|
LL | fn boxed_boxed_scribbled<'a>(s: Box<Box<Scribble<'a>>>) -> &'a mut u32 {
| -- lifetime `'a` defined here
LL | &mut *(**s).0 //[nll]~ ERROR borrow may still be in use when destructor runs [E0713]
| ^^^^^^^^^^^^^
| ^^^^^^^^^^^^^ returning this value requires that `*s.0` is borrowed for `'a`
...
LL | }
| - here, drop of `s` needs exclusive access to `*s.0`, because the type `Scribble<'_>` implements the `Drop` trait
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 82:26...
--> $DIR/issue-45696-scribble-on-boxed-borrow.rs:82:26
|
LL | fn boxed_boxed_scribbled<'a>(s: Box<Box<Scribble<'a>>>) -> &'a mut u32 {
| ^^
error: aborting due to 3 previous errors
......
src/test/ui/issues/issue-46036.stderr
浏览文件 @ 31b97f78
......@@ -2,12 +2,13 @@ error[E0597]: `a` does not live long enough
--> $DIR/issue-46036.rs:19:24
|
LL | let foo = Foo { x: &a }; //~ ERROR E0597
| ^^ borrowed value does not live long enough
| ^^
| |
| borrowed value does not live long enough
| requires that `a` is borrowed for `'static`
LL | loop { }
LL | }
| - `a` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
error: aborting due to previous error
......
src/test/ui/issues/issue-46471.rs
浏览文件 @ 31b97f78
......@@ -14,7 +14,7 @@ fn foo() -> &'static u32 {
let x = 0;
&x
//~^ ERROR `x` does not live long enough (Ast) [E0597]
//~| ERROR `x` does not live long enough (Mir) [E0597]
//~| ERROR cannot return reference to local variable `x` (Mir) [E0515]
}
fn main() { }
src/test/ui/issues/issue-46471.stderr
浏览文件 @ 31b97f78
......@@ -9,17 +9,13 @@ LL | }
|
= note: borrowed value must be valid for the static lifetime...
error[E0597]: `x` does not live long enough (Mir)
error[E0515]: cannot return reference to local variable `x` (Mir)
--> $DIR/issue-46471.rs:15:5
|
LL | &x
| ^^ borrowed value does not live long enough
...
LL | }
| - `x` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
| ^^ returns a reference to data owned by the current function
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0597`.
Some errors occurred: E0515, E0597.
For more information about an error, try `rustc --explain E0515`.
src/test/ui/issues/issue-46472.rs
浏览文件 @ 31b97f78
......@@ -13,7 +13,7 @@
fn bar<'a>() -> &'a mut u32 {
&mut 4
//~^ ERROR borrowed value does not live long enough (Ast) [E0597]
//~| ERROR temporary value dropped while borrowed (Mir) [E0716]
//~| ERROR cannot return reference to temporary value (Mir) [E0515]
}
fn main() { }
src/test/ui/issues/issue-46472.stderr
浏览文件 @ 31b97f78
......@@ -13,22 +13,16 @@ note: borrowed value must be valid for the lifetime 'a as defined on the functio
LL | fn bar<'a>() -> &'a mut u32 {
| ^^
error[E0716]: temporary value dropped while borrowed (Mir)
--> $DIR/issue-46472.rs:14:10
error[E0515]: cannot return reference to temporary value (Mir)
--> $DIR/issue-46472.rs:14:5
|
LL | &mut 4
| ^ creates a temporary which is freed while still in use
...
LL | }
| - temporary value is freed at the end of this statement
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 13:8...
--> $DIR/issue-46472.rs:13:8
|
LL | fn bar<'a>() -> &'a mut u32 {
| ^^
| ^^^^^-
| | |
| | temporary value created here
| returns a reference to data owned by the current function
error: aborting due to 2 previous errors
Some errors occurred: E0597, E0716.
For more information about an error, try `rustc --explain E0597`.
Some errors occurred: E0515, E0597.
For more information about an error, try `rustc --explain E0515`.
src/test/ui/issues/issue-47184.stderr
浏览文件 @ 31b97f78
......@@ -2,11 +2,10 @@ error[E0716]: temporary value dropped while borrowed
--> $DIR/issue-47184.rs:14:44
|
LL | let _vec: Vec<&'static String> = vec![&String::new()];
| ^^^^^^^^^^^^^ - temporary value is freed at the end of this statement
| |
| creates a temporary which is freed while still in use
|
= note: borrowed value must be valid for the static lifetime...
| -------------------- ^^^^^^^^^^^^^ - temporary value is freed at the end of this statement
| | |
| | creates a temporary which is freed while still in use
| type annotation requires that borrow lasts for `'static`
error: aborting due to previous error
......
src/test/ui/issues/issue-52049.nll.stderr
浏览文件 @ 31b97f78
......@@ -2,11 +2,12 @@ error[E0716]: temporary value dropped while borrowed
--> $DIR/issue-52049.rs:16:10
|
LL | foo(&unpromotable(5u32));
| ^^^^^^^^^^^^^^^^^^ creates a temporary which is freed while still in use
| -----^^^^^^^^^^^^^^^^^^-
| | |
| | creates a temporary which is freed while still in use
| argument requires that borrow lasts for `'static`
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
error: aborting due to previous error
......
src/test/ui/nll/borrowed-universal-error-2.rs
浏览文件 @ 31b97f78
......@@ -14,7 +14,7 @@
fn foo<'a>(x: &'a (u32,)) -> &'a u32 {
let v = 22;
&v
//~^ ERROR `v` does not live long enough [E0597]
//~^ ERROR cannot return reference to local variable `v` [E0515]
}
fn main() {}
src/test/ui/nll/borrowed-universal-error-2.stderr
浏览文件 @ 31b97f78
error[E0597]: `v` does not live long enough
error[E0515]: cannot return reference to local variable `v`
--> $DIR/borrowed-universal-error-2.rs:16:5
|
LL | fn foo<'a>(x: &'a (u32,)) -> &'a u32 {
| -- -- also has lifetime `'a`
| |
| has lifetime `'a`
LL | let v = 22;
LL | &v
| ^^ `v` would have to be valid for `'a`...
LL | //~^ ERROR `v` does not live long enough [E0597]
LL | }
| - ...but `v` will be dropped here, when the function `foo` returns
|
= help: use data from the highlighted arguments which match the `'a` lifetime of the return type
= note: functions cannot return a borrow to data owned within the function's scope, functions can only return borrows to data passed as arguments
= note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch04-02-references-and-borrowing.html#dangling-references>
| ^^ returns a reference to data owned by the current function
error: aborting due to previous error
For more information about this error, try `rustc --explain E0597`.
For more information about this error, try `rustc --explain E0515`.
src/test/ui/nll/borrowed-universal-error.rs
浏览文件 @ 31b97f78
......@@ -18,7 +18,7 @@ fn gimme(x: &(u32,)) -> &u32 {
fn foo<'a>(x: &'a (u32,)) -> &'a u32 {
let v = 22;
gimme(&(v,))
//~^ ERROR temporary value dropped while borrowed [E0716]
//~^ ERROR cannot return value referencing temporary value [E0515]
}
fn main() {}
src/test/ui/nll/borrowed-universal-error.stderr
浏览文件 @ 31b97f78
error[E0716]: temporary value dropped while borrowed
--> $DIR/borrowed-universal-error.rs:20:12
error[E0515]: cannot return value referencing temporary value
--> $DIR/borrowed-universal-error.rs:20:5
|
LL | gimme(&(v,))
| ^^^^ creates a temporary which is freed while still in use
LL | //~^ ERROR temporary value dropped while borrowed [E0716]
LL | }
| - temporary value is freed at the end of this statement
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 18:8...
--> $DIR/borrowed-universal-error.rs:18:8
|
LL | fn foo<'a>(x: &'a (u32,)) -> &'a u32 {
| ^^
| ^^^^^^^----^
| | |
| | temporary value created here
| returns a value referencing data owned by the current function
error: aborting due to previous error
For more information about this error, try `rustc --explain E0716`.
For more information about this error, try `rustc --explain E0515`.
src/test/ui/nll/closure-requirements/propagate-approximated-shorter-to-static-comparing-against-free.stderr
浏览文件 @ 31b97f78
......@@ -13,7 +13,7 @@ LL | | })
for<'r> extern "rust-call" fn((std::cell::Cell<&'_#1r u32>, std::cell::Cell<&ReLateBound(DebruijnIndex(0), BrNamed(crate0:DefIndex(0:0), 'r)) u32>))
]
error: borrowed data escapes outside of closure
error[E0521]: borrowed data escapes outside of closure
--> $DIR/propagate-approximated-shorter-to-static-comparing-against-free.rs:32:9
|
LL | foo(cell, |cell_a, cell_x| {
......@@ -71,13 +71,15 @@ error[E0597]: `a` does not live long enough
--> $DIR/propagate-approximated-shorter-to-static-comparing-against-free.rs:40:26
|
LL | let cell = Cell::new(&a);
| ^^ borrowed value does not live long enough
| ----------^^-
| | |
| | borrowed value does not live long enough
| argument requires that `a` is borrowed for `'static`
...
LL | }
| - `a` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0597`.
Some errors occurred: E0521, E0597.
For more information about an error, try `rustc --explain E0521`.
src/test/ui/nll/closure-requirements/propagate-approximated-shorter-to-static-no-bound.stderr
浏览文件 @ 31b97f78
......@@ -34,7 +34,7 @@ LL | | }
|
= note: defining type: DefId(0/0:6 ~ propagate_approximated_shorter_to_static_no_bound[317d]::supply[0]) with substs []
error: borrowed data escapes outside of function
error[E0521]: borrowed data escapes outside of function
--> $DIR/propagate-approximated-shorter-to-static-no-bound.rs:45:5
|
LL | fn supply<'a, 'b>(cell_a: Cell<&'a u32>, cell_b: Cell<&'b u32>) {
......@@ -61,3 +61,4 @@ LL | demand_y(x, y, x.get())
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0521`.
src/test/ui/nll/closure-requirements/propagate-approximated-shorter-to-static-wrong-bound.stderr
浏览文件 @ 31b97f78
......@@ -33,7 +33,7 @@ LL | | }
|
= note: defining type: DefId(0/0:6 ~ propagate_approximated_shorter_to_static_wrong_bound[317d]::supply[0]) with substs []
error: borrowed data escapes outside of function
error[E0521]: borrowed data escapes outside of function
--> $DIR/propagate-approximated-shorter-to-static-wrong-bound.rs:48:5
|
LL | fn supply<'a, 'b>(cell_a: Cell<&'a u32>, cell_b: Cell<&'b u32>) {
......@@ -59,3 +59,4 @@ LL | demand_y(x, y, x.get())
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0521`.
src/test/ui/nll/do-not-ignore-lifetime-bounds-in-copy.stderr
浏览文件 @ 31b97f78
......@@ -3,11 +3,11 @@ error[E0597]: `s` does not live long enough
|
LL | let a = Foo(&s); //~ ERROR `s` does not live long enough [E0597]
| ^^ borrowed value does not live long enough
...
LL | drop(a);
| - copying this value requires that `s` is borrowed for `'static`
LL | drop(a);
LL | }
| - `s` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
error: aborting due to previous error
......
src/test/ui/nll/enum-drop-access.stderr
浏览文件 @ 31b97f78
error[E0713]: borrow may still be in use when destructor runs
--> $DIR/enum-drop-access.rs:15:31
|
LL | fn drop_enum(opt: DropOption<&mut i32>) -> Option<&mut i32> {
| - let's call the lifetime of this reference `'1`
LL | match opt {
LL | DropOption::Some(&mut ref mut r) => { //~ ERROR
| ^^^^^^^^^
LL | Some(r)
| ------- returning this value requires that `*opt.0` is borrowed for `'1`
...
LL | }
| - here, drop of `opt` needs exclusive access to `*opt.0`, because the type `DropOption<&mut i32>` implements the `Drop` trait
|
note: borrowed value must be valid for the anonymous lifetime #1 defined on the function body at 13:1...
--> $DIR/enum-drop-access.rs:13:1
|
LL | / fn drop_enum(opt: DropOption<&mut i32>) -> Option<&mut i32> {
LL | | match opt {
LL | | DropOption::Some(&mut ref mut r) => { //~ ERROR
LL | | Some(r)
... |
LL | | }
LL | | }
| |_^
error[E0713]: borrow may still be in use when destructor runs
--> $DIR/enum-drop-access.rs:24:36
|
LL | fn optional_drop_enum(opt: Option<DropOption<&mut i32>>) -> Option<&mut i32> {
| - let's call the lifetime of this reference `'1`
LL | match opt {
LL | Some(DropOption::Some(&mut ref mut r)) => { //~ ERROR
| ^^^^^^^^^
LL | Some(r)
| ------- returning this value requires that `*opt.0.0` is borrowed for `'1`
...
LL | }
| - here, drop of `opt` needs exclusive access to `*opt.0.0`, because the type `DropOption<&mut i32>` implements the `Drop` trait
|
note: borrowed value must be valid for the anonymous lifetime #1 defined on the function body at 22:1...
--> $DIR/enum-drop-access.rs:22:1
|
LL | / fn optional_drop_enum(opt: Option<DropOption<&mut i32>>) -> Option<&mut i32> {
LL | | match opt {
LL | | Some(DropOption::Some(&mut ref mut r)) => { //~ ERROR
LL | | Some(r)
... |
LL | | }
LL | | }
| |_^
error: aborting due to 2 previous errors
......
src/test/ui/nll/get_default.nll.stderr
浏览文件 @ 31b97f78
......@@ -37,65 +37,47 @@ LL | }
error[E0502]: cannot borrow `*map` as mutable because it is also borrowed as immutable (Mir)
--> $DIR/get_default.rs:33:17
|
LL | fn ok(map: &mut Map) -> &String {
| - let's call the lifetime of this reference `'1`
LL | loop {
LL | match map.get() {
| --- immutable borrow occurs here
LL | Some(v) => {
LL | return v;
| - returning this value requires that `*map` is borrowed for `'1`
...
LL | map.set(String::new()); // Ideally, this would not error.
| ^^^^^^^^^^^^^^^^^^^^^^ mutable borrow occurs here
|
note: immutable borrowed value must be valid for the anonymous lifetime #1 defined on the function body at 26:1...
--> $DIR/get_default.rs:26:1
|
LL | / fn ok(map: &mut Map) -> &String {
LL | | loop {
LL | | match map.get() {
LL | | Some(v) => {
... |
LL | | }
LL | | }
| |_^
error[E0502]: cannot borrow `*map` as mutable because it is also borrowed as immutable (Mir)
--> $DIR/get_default.rs:45:17
|
LL | fn err(map: &mut Map) -> &String {
| - let's call the lifetime of this reference `'1`
LL | loop {
LL | match map.get() {
| --- immutable borrow occurs here
LL | Some(v) => {
LL | map.set(String::new()); // Both AST and MIR error here
| ^^^^^^^^^^^^^^^^^^^^^^ mutable borrow occurs here
|
note: immutable borrowed value must be valid for the anonymous lifetime #1 defined on the function body at 41:1...
--> $DIR/get_default.rs:41:1
|
LL | / fn err(map: &mut Map) -> &String {
LL | | loop {
LL | | match map.get() {
LL | | Some(v) => {
... |
LL | | }
LL | | }
| |_^
...
LL | return v;
| - returning this value requires that `*map` is borrowed for `'1`
error[E0502]: cannot borrow `*map` as mutable because it is also borrowed as immutable (Mir)
--> $DIR/get_default.rs:51:17
|
LL | fn err(map: &mut Map) -> &String {
| - let's call the lifetime of this reference `'1`
LL | loop {
LL | match map.get() {
| --- immutable borrow occurs here
...
LL | return v;
| - returning this value requires that `*map` is borrowed for `'1`
...
LL | map.set(String::new()); // Ideally, just AST would error here
| ^^^^^^^^^^^^^^^^^^^^^^ mutable borrow occurs here
|
note: immutable borrowed value must be valid for the anonymous lifetime #1 defined on the function body at 41:1...
--> $DIR/get_default.rs:41:1
|
LL | / fn err(map: &mut Map) -> &String {
LL | | loop {
LL | | match map.get() {
LL | | Some(v) => {
... |
LL | | }
LL | | }
| |_^
error: aborting due to 6 previous errors
......
src/test/ui/nll/get_default.stderr
浏览文件 @ 31b97f78
......@@ -37,65 +37,47 @@ LL | }
error[E0502]: cannot borrow `*map` as mutable because it is also borrowed as immutable (Mir)
--> $DIR/get_default.rs:33:17
|
LL | fn ok(map: &mut Map) -> &String {
| - let's call the lifetime of this reference `'1`
LL | loop {
LL | match map.get() {
| --- immutable borrow occurs here
LL | Some(v) => {
LL | return v;
| - returning this value requires that `*map` is borrowed for `'1`
...
LL | map.set(String::new()); // Ideally, this would not error.
| ^^^ mutable borrow occurs here
|
note: immutable borrowed value must be valid for the anonymous lifetime #1 defined on the function body at 26:1...
--> $DIR/get_default.rs:26:1
|
LL | / fn ok(map: &mut Map) -> &String {
LL | | loop {
LL | | match map.get() {
LL | | Some(v) => {
... |
LL | | }
LL | | }
| |_^
error[E0502]: cannot borrow `*map` as mutable because it is also borrowed as immutable (Mir)
--> $DIR/get_default.rs:45:17
|
LL | fn err(map: &mut Map) -> &String {
| - let's call the lifetime of this reference `'1`
LL | loop {
LL | match map.get() {
| --- immutable borrow occurs here
LL | Some(v) => {
LL | map.set(String::new()); // Both AST and MIR error here
| ^^^ mutable borrow occurs here
|
note: immutable borrowed value must be valid for the anonymous lifetime #1 defined on the function body at 41:1...
--> $DIR/get_default.rs:41:1
|
LL | / fn err(map: &mut Map) -> &String {
LL | | loop {
LL | | match map.get() {
LL | | Some(v) => {
... |
LL | | }
LL | | }
| |_^
...
LL | return v;
| - returning this value requires that `*map` is borrowed for `'1`
error[E0502]: cannot borrow `*map` as mutable because it is also borrowed as immutable (Mir)
--> $DIR/get_default.rs:51:17
|
LL | fn err(map: &mut Map) -> &String {
| - let's call the lifetime of this reference `'1`
LL | loop {
LL | match map.get() {
| --- immutable borrow occurs here
...
LL | return v;
| - returning this value requires that `*map` is borrowed for `'1`
...
LL | map.set(String::new()); // Ideally, just AST would error here
| ^^^ mutable borrow occurs here
|
note: immutable borrowed value must be valid for the anonymous lifetime #1 defined on the function body at 41:1...
--> $DIR/get_default.rs:41:1
|
LL | / fn err(map: &mut Map) -> &String {
LL | | loop {
LL | | match map.get() {
LL | | Some(v) => {
... |
LL | | }
LL | | }
| |_^
error: aborting due to 6 previous errors
......
src/test/ui/nll/issue-31567.stderr
浏览文件 @ 31b97f78
error[E0713]: borrow may still be in use when destructor runs
--> $DIR/issue-31567.rs:22:26
|
LL | fn get_dangling<'a>(v: VecWrapper<'a>) -> &'a u32 {
| -- lifetime `'a` defined here
LL | let s_inner: &'a S = &*v.0; //~ ERROR borrow may still be in use when destructor runs [E0713]
| ^^^^^
| ----- ^^^^^
| |
| type annotation requires that `*v.0` is borrowed for `'a`
LL | &s_inner.0
LL | }
| - here, drop of `v` needs exclusive access to `*v.0`, because the type `VecWrapper<'_>` implements the `Drop` trait
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 21:17...
--> $DIR/issue-31567.rs:21:17
|
LL | fn get_dangling<'a>(v: VecWrapper<'a>) -> &'a u32 {
| ^^
error: aborting due to previous error
......
src/test/ui/nll/issue-47470.rs
浏览文件 @ 31b97f78
......@@ -24,7 +24,7 @@ impl<'a> Bar for Foo<'a> {
type Assoc = &'a u32;
fn get(self) -> Self::Assoc {
let local = 42;
&local //~ ERROR `local` does not live long enough
&local //~ ERROR cannot return reference to local variable `local`
}
}
......
src/test/ui/nll/issue-47470.stderr
浏览文件 @ 31b97f78
error[E0597]: `local` does not live long enough
error[E0515]: cannot return reference to local variable `local`
--> $DIR/issue-47470.rs:27:9
|
LL | &local //~ ERROR `local` does not live long enough
| ^^^^^^ borrowed value does not live long enough
LL | }
| - `local` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the impl at 23:6...
--> $DIR/issue-47470.rs:23:6
|
LL | impl<'a> Bar for Foo<'a> {
| ^^
LL | &local //~ ERROR cannot return reference to local variable `local`
| ^^^^^^ returns a reference to data owned by the current function
error: aborting due to previous error
For more information about this error, try `rustc --explain E0597`.
For more information about this error, try `rustc --explain E0515`.
src/test/ui/nll/issue-52059-report-when-borrow-and-drop-conflict.stderr
浏览文件 @ 31b97f78
error[E0713]: borrow may still be in use when destructor runs
--> $DIR/issue-52059-report-when-borrow-and-drop-conflict.rs:14:5
|
LL | fn finish_1(s: S) -> &mut String {
| - has type `S<'1>`
LL | s.url
| ^^^^^
| ^^^^^ returning this value requires that `*s.url` is borrowed for `'1`
LL | }
| - here, drop of `s` needs exclusive access to `*s.url`, because the type `S<'_>` implements the `Drop` trait
|
note: borrowed value must be valid for the anonymous lifetime #1 defined on the function body at 13:1...
--> $DIR/issue-52059-report-when-borrow-and-drop-conflict.rs:13:1
|
LL | / fn finish_1(s: S) -> &mut String {
LL | | s.url
LL | | }
| |_^
error[E0713]: borrow may still be in use when destructor runs
--> $DIR/issue-52059-report-when-borrow-and-drop-conflict.rs:19:13
|
LL | fn finish_2(s: S) -> &mut String {
| - has type `S<'1>`
LL | let p = &mut *s.url; p
| ^^^^^^^^^^^
| ^^^^^^^^^^^ - returning this value requires that `*s.url` is borrowed for `'1`
LL | }
| - here, drop of `s` needs exclusive access to `*s.url`, because the type `S<'_>` implements the `Drop` trait
|
note: borrowed value must be valid for the anonymous lifetime #1 defined on the function body at 18:1...
--> $DIR/issue-52059-report-when-borrow-and-drop-conflict.rs:18:1
|
LL | / fn finish_2(s: S) -> &mut String {
LL | | let p = &mut *s.url; p
LL | | }
| |_^
error[E0713]: borrow may still be in use when destructor runs
--> $DIR/issue-52059-report-when-borrow-and-drop-conflict.rs:24:21
|
LL | fn finish_3(s: S) -> &mut String {
| - has type `S<'1>`
LL | let p: &mut _ = s.url; p
| ^^^^^
| ^^^^^ - returning this value requires that `*s.url` is borrowed for `'1`
LL | }
| - here, drop of `s` needs exclusive access to `*s.url`, because the type `S<'_>` implements the `Drop` trait
|
note: borrowed value must be valid for the anonymous lifetime #1 defined on the function body at 23:1...
--> $DIR/issue-52059-report-when-borrow-and-drop-conflict.rs:23:1
|
LL | / fn finish_3(s: S) -> &mut String {
LL | | let p: &mut _ = s.url; p
LL | | }
| |_^
error[E0509]: cannot move out of type `S<'_>`, which implements the `Drop` trait
--> $DIR/issue-52059-report-when-borrow-and-drop-conflict.rs:29:13
......
src/test/ui/nll/issue-52534-1.stderr
浏览文件 @ 31b97f78
error[E0597]: `x` does not live long enough
error[E0515]: cannot return reference to local variable `x`
--> $DIR/issue-52534-1.rs:19:9
|
LL | fn bar(&self, x: &u32) -> &u32 {
| ----- ---- has type `&'0 u32`
| |
| has type `&'0 Test`
LL | let x = 22;
LL | &x
| ^^ `x` would have to be valid for `'0`...
LL | }
| - ...but `x` will be dropped here, when the function `bar` returns
|
= note: argument and return type have the same lifetime due to lifetime elision rules
= note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch10-03-lifetime-syntax.html#lifetime-elision>
= note: functions cannot return a borrow to data owned within the function's scope, functions can only return borrows to data passed as arguments
= note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch04-02-references-and-borrowing.html#dangling-references>
| ^^ returns a reference to data owned by the current function
error[E0597]: `x` does not live long enough
error[E0515]: cannot return reference to local variable `x`
--> $DIR/issue-52534-1.rs:25:5
|
LL | fn foo(x: &u32) -> &u32 {
| ---- ---- also has type `&'0 u32`
| |
| has type `&'0 u32`
LL | let x = 22;
LL | &x
| ^^ `x` would have to be valid for `'0`...
LL | }
| - ...but `x` will be dropped here, when the function `foo` returns
|
= note: argument and return type have the same lifetime due to lifetime elision rules
= note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch10-03-lifetime-syntax.html#lifetime-elision>
= note: functions cannot return a borrow to data owned within the function's scope, functions can only return borrows to data passed as arguments
= note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch04-02-references-and-borrowing.html#dangling-references>
| ^^ returns a reference to data owned by the current function
error[E0597]: `x` does not live long enough
--> $DIR/issue-52534-1.rs:30:6
error[E0515]: cannot return value referencing local variable `x`
--> $DIR/issue-52534-1.rs:30:5
|
LL | fn baz(x: &u32) -> &&u32 {
| ---- ----- has type `&'0 &'0 u32`
| |
| has type `&'0 u32`
LL | let x = 22;
LL | &&x
| ^^ `x` would have to be valid for `'0`...
LL | }
| - ...but `x` will be dropped here, when the function `baz` returns
|
= note: argument and return type have the same lifetime due to lifetime elision rules
= note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch10-03-lifetime-syntax.html#lifetime-elision>
= note: functions cannot return a borrow to data owned within the function's scope, functions can only return borrows to data passed as arguments
= note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch04-02-references-and-borrowing.html#dangling-references>
| ^--
| ||
| |`x` is borrowed here
| returns a value referencing data owned by the current function
error[E0716]: temporary value dropped while borrowed
--> $DIR/issue-52534-1.rs:30:6
error[E0515]: cannot return reference to temporary value
--> $DIR/issue-52534-1.rs:30:5
|
LL | &&x
| ^^ creates a temporary which is freed while still in use
LL | }
| - temporary value is freed at the end of this statement
|
note: borrowed value must be valid for the anonymous lifetime #1 defined on the function body at 28:1...
--> $DIR/issue-52534-1.rs:28:1
|
LL | / fn baz(x: &u32) -> &&u32 {
LL | | let x = 22;
LL | | &&x
LL | | }
| |_^
| ^--
| ||
| |temporary value created here
| returns a reference to data owned by the current function
error[E0597]: `x` does not live long enough
error[E0515]: cannot return reference to local variable `x`
--> $DIR/issue-52534-1.rs:35:5
|
LL | fn foobazbar<'a>(x: u32, y: &'a u32) -> &'a u32 {
| -- -- also has lifetime `'a`
| |
| has lifetime `'a`
LL | let x = 22;
LL | &x
| ^^ `x` would have to be valid for `'a`...
LL | }
| - ...but `x` will be dropped here, when the function `foobazbar` returns
|
= help: use data from the highlighted arguments which match the `'a` lifetime of the return type
= note: functions cannot return a borrow to data owned within the function's scope, functions can only return borrows to data passed as arguments
= note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch04-02-references-and-borrowing.html#dangling-references>
| ^^ returns a reference to data owned by the current function
error[E0597]: `x` does not live long enough
error[E0515]: cannot return reference to local variable `x`
--> $DIR/issue-52534-1.rs:40:5
|
LL | fn foobar<'a>(x: &'a u32) -> &'a u32 {
| -- -- also has lifetime `'a`
| |
| has lifetime `'a`
LL | let x = 22;
LL | &x
| ^^ `x` would have to be valid for `'a`...
LL | }
| - ...but `x` will be dropped here, when the function `foobar` returns
|
= help: use data from the highlighted arguments which match the `'a` lifetime of the return type
= note: functions cannot return a borrow to data owned within the function's scope, functions can only return borrows to data passed as arguments
= note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch04-02-references-and-borrowing.html#dangling-references>
| ^^ returns a reference to data owned by the current function
error[E0597]: `x` does not live long enough
error[E0515]: cannot return reference to local variable `x`
--> $DIR/issue-52534-1.rs:45:5
|
LL | fn foobaz<'a, 'b>(x: &'a u32, y: &'b u32) -> &'a u32 {
| -- has lifetime `'a` -- also has lifetime `'a`
LL | let x = 22;
LL | &x
| ^^ `x` would have to be valid for `'a`...
LL | }
| - ...but `x` will be dropped here, when the function `foobaz` returns
|
= help: use data from the highlighted arguments which match the `'a` lifetime of the return type
= note: functions cannot return a borrow to data owned within the function's scope, functions can only return borrows to data passed as arguments
= note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch04-02-references-and-borrowing.html#dangling-references>
| ^^ returns a reference to data owned by the current function
error[E0597]: `x` does not live long enough
error[E0515]: cannot return reference to local variable `x`
--> $DIR/issue-52534-1.rs:50:5
|
LL | fn foobarbaz<'a, 'b>(x: &'a u32, y: &'b u32, z: &'a u32) -> &'a u32 {
| -- -- -- also has lifetime `'a`
| | |
| has lifetime `'a` has lifetime `'a`
LL | let x = 22;
LL | &x
| ^^ `x` would have to be valid for `'a`...
LL | }
| - ...but `x` will be dropped here, when the function `foobarbaz` returns
|
= help: use data from the highlighted arguments which match the `'a` lifetime of the return type
= note: functions cannot return a borrow to data owned within the function's scope, functions can only return borrows to data passed as arguments
= note: to learn more, visit <https://doc.rust-lang.org/book/second-edition/ch04-02-references-and-borrowing.html#dangling-references>
| ^^ returns a reference to data owned by the current function
error: aborting due to 8 previous errors
Some errors occurred: E0597, E0716.
For more information about an error, try `rustc --explain E0597`.
For more information about this error, try `rustc --explain E0515`.
src/test/ui/nll/polonius-smoke-test.stderr
浏览文件 @ 31b97f78
error[E0597]: `x` does not live long enough
error[E0515]: cannot return reference to local variable `x`
--> $DIR/polonius-smoke-test.rs:7:5
|
LL | &x //~ ERROR
| ^^ borrowed value does not live long enough
LL | }
| - `x` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
| ^^ returns a reference to data owned by the current function
error[E0503]: cannot use `x` because it was mutably borrowed
--> $DIR/polonius-smoke-test.rs:13:13
......@@ -41,5 +37,5 @@ LL | tmp;
error: aborting due to 4 previous errors
Some errors occurred: E0503, E0505, E0597.
Some errors occurred: E0503, E0505, E0515.
For more information about an error, try `rustc --explain E0503`.
src/test/ui/nll/relate_tys/var-appears-twice.stderr
浏览文件 @ 31b97f78
......@@ -2,12 +2,12 @@ error[E0597]: `b` does not live long enough
--> $DIR/var-appears-twice.rs:33:38
|
LL | let x: DoubleCell<_> = make_cell(&b); //~ ERROR
| ^^ borrowed value does not live long enough
| ------------- ^^ borrowed value does not live long enough
| |
| type annotation requires that `b` is borrowed for `'static`
...
LL | }
| - `b` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
error: aborting due to previous error
......
src/test/ui/nll/return-ref-mut-issue-46557.rs
浏览文件 @ 31b97f78
......@@ -14,8 +14,8 @@
#![allow(dead_code)]
fn gimme_static_mut() -> &'static mut u32 {
let ref mut x = 1234543; //~ ERROR temporary value dropped while borrowed [E0716]
x
let ref mut x = 1234543;
x //~ ERROR cannot return value referencing temporary value [E0515]
}
fn main() {}
src/test/ui/nll/return-ref-mut-issue-46557.stderr
浏览文件 @ 31b97f78
error[E0716]: temporary value dropped while borrowed
--> $DIR/return-ref-mut-issue-46557.rs:17:21
error[E0515]: cannot return value referencing temporary value
--> $DIR/return-ref-mut-issue-46557.rs:18:5
|
LL | let ref mut x = 1234543; //~ ERROR temporary value dropped while borrowed [E0716]
| ^^^^^^^ creates a temporary which is freed while still in use
LL | x
LL | }
| - temporary value is freed at the end of this statement
|
= note: borrowed value must be valid for the static lifetime...
LL | let ref mut x = 1234543;
| ------- temporary value created here
LL | x //~ ERROR cannot return value referencing temporary value [E0515]
| ^ returns a value referencing data owned by the current function
error: aborting due to previous error
For more information about this error, try `rustc --explain E0716`.
For more information about this error, try `rustc --explain E0515`.
src/test/ui/nll/user-annotations/adt-brace-enums.stderr
浏览文件 @ 31b97f78
......@@ -2,39 +2,40 @@ error[E0597]: `c` does not live long enough
--> $DIR/adt-brace-enums.rs:37:48
|
LL | SomeEnum::SomeVariant::<&'static u32> { t: &c }; //~ ERROR
| ^^ borrowed value does not live long enough
| ^^
| |
| borrowed value does not live long enough
| requires that `c` is borrowed for `'static`
LL | }
| - `c` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
error[E0597]: `c` does not live long enough
--> $DIR/adt-brace-enums.rs:42:43
|
LL | fn annot_reference_named_lifetime<'a>(_d: &'a u32) {
| -- lifetime `'a` defined here
LL | let c = 66;
LL | SomeEnum::SomeVariant::<&'a u32> { t: &c }; //~ ERROR
| ^^ borrowed value does not live long enough
| ^^
| |
| borrowed value does not live long enough
| requires that `c` is borrowed for `'a`
LL | }
| - `c` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 40:35...
--> $DIR/adt-brace-enums.rs:40:35
|
LL | fn annot_reference_named_lifetime<'a>(_d: &'a u32) {
| ^^
error[E0597]: `c` does not live long enough
--> $DIR/adt-brace-enums.rs:52:47
|
LL | fn annot_reference_named_lifetime_in_closure<'a>(_: &'a u32) {
| -- lifetime `'a` defined here
...
LL | SomeEnum::SomeVariant::<&'a u32> { t: &c }; //~ ERROR
| ^^ borrowed value does not live long enough
| ^^
| |
| borrowed value does not live long enough
| requires that `c` is borrowed for `'a`
LL | };
| - `c` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 49:46...
--> $DIR/adt-brace-enums.rs:49:46
|
LL | fn annot_reference_named_lifetime_in_closure<'a>(_: &'a u32) {
| ^^
error: aborting due to 3 previous errors
......
src/test/ui/nll/user-annotations/adt-brace-structs.stderr
浏览文件 @ 31b97f78
......@@ -2,39 +2,40 @@ error[E0597]: `c` does not live long enough
--> $DIR/adt-brace-structs.rs:35:37
|
LL | SomeStruct::<&'static u32> { t: &c }; //~ ERROR
| ^^ borrowed value does not live long enough
| ^^
| |
| borrowed value does not live long enough
| requires that `c` is borrowed for `'static`
LL | }
| - `c` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
error[E0597]: `c` does not live long enough
--> $DIR/adt-brace-structs.rs:40:32
|
LL | fn annot_reference_named_lifetime<'a>(_d: &'a u32) {
| -- lifetime `'a` defined here
LL | let c = 66;
LL | SomeStruct::<&'a u32> { t: &c }; //~ ERROR
| ^^ borrowed value does not live long enough
| ^^
| |
| borrowed value does not live long enough
| requires that `c` is borrowed for `'a`
LL | }
| - `c` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 38:35...
--> $DIR/adt-brace-structs.rs:38:35
|
LL | fn annot_reference_named_lifetime<'a>(_d: &'a u32) {
| ^^
error[E0597]: `c` does not live long enough
--> $DIR/adt-brace-structs.rs:50:36
|
LL | fn annot_reference_named_lifetime_in_closure<'a>(_: &'a u32) {
| -- lifetime `'a` defined here
...
LL | SomeStruct::<&'a u32> { t: &c }; //~ ERROR
| ^^ borrowed value does not live long enough
| ^^
| |
| borrowed value does not live long enough
| requires that `c` is borrowed for `'a`
LL | };
| - `c` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 47:46...
--> $DIR/adt-brace-structs.rs:47:46
|
LL | fn annot_reference_named_lifetime_in_closure<'a>(_: &'a u32) {
| ^^
error: aborting due to 3 previous errors
......
src/test/ui/nll/user-annotations/adt-nullary-enums.stderr
浏览文件 @ 31b97f78
......@@ -2,42 +2,43 @@ error[E0597]: `c` does not live long enough
--> $DIR/adt-nullary-enums.rs:44:41
|
LL | SomeEnum::SomeVariant(Cell::new(&c)), //~ ERROR
| ^^ borrowed value does not live long enough
| ----------^^-
| | |
| | borrowed value does not live long enough
| argument requires that `c` is borrowed for `'static`
...
LL | }
| - `c` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
error[E0597]: `c` does not live long enough
--> $DIR/adt-nullary-enums.rs:52:41
|
LL | fn annot_reference_named_lifetime<'a>(_d: &'a u32) {
| -- lifetime `'a` defined here
...
LL | SomeEnum::SomeVariant(Cell::new(&c)), //~ ERROR
| ^^ borrowed value does not live long enough
| ----------^^-
| | |
| | borrowed value does not live long enough
| argument requires that `c` is borrowed for `'a`
...
LL | }
| - `c` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 49:35...
--> $DIR/adt-nullary-enums.rs:49:35
|
LL | fn annot_reference_named_lifetime<'a>(_d: &'a u32) {
| ^^
error[E0597]: `c` does not live long enough
--> $DIR/adt-nullary-enums.rs:65:45
|
LL | fn annot_reference_named_lifetime_in_closure<'a>(_: &'a u32) {
| -- lifetime `'a` defined here
...
LL | SomeEnum::SomeVariant(Cell::new(&c)), //~ ERROR
| ^^ borrowed value does not live long enough
| ----------^^-
| | |
| | borrowed value does not live long enough
| argument requires that `c` is borrowed for `'a`
...
LL | };
| - `c` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 61:46...
--> $DIR/adt-nullary-enums.rs:61:46
|
LL | fn annot_reference_named_lifetime_in_closure<'a>(_: &'a u32) {
| ^^
error: aborting due to 3 previous errors
......
src/test/ui/nll/user-annotations/adt-tuple-enums.stderr
浏览文件 @ 31b97f78
......@@ -2,39 +2,40 @@ error[E0597]: `c` does not live long enough
--> $DIR/adt-tuple-enums.rs:39:43
|
LL | SomeEnum::SomeVariant::<&'static u32>(&c); //~ ERROR
| ^^ borrowed value does not live long enough
| ^^
| |
| borrowed value does not live long enough
| requires that `c` is borrowed for `'static`
LL | }
| - `c` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
error[E0597]: `c` does not live long enough
--> $DIR/adt-tuple-enums.rs:44:38
|
LL | fn annot_reference_named_lifetime<'a>(_d: &'a u32) {
| -- lifetime `'a` defined here
LL | let c = 66;
LL | SomeEnum::SomeVariant::<&'a u32>(&c); //~ ERROR
| ^^ borrowed value does not live long enough
| ^^
| |
| borrowed value does not live long enough
| requires that `c` is borrowed for `'a`
LL | }
| - `c` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 42:35...
--> $DIR/adt-tuple-enums.rs:42:35
|
LL | fn annot_reference_named_lifetime<'a>(_d: &'a u32) {
| ^^
error[E0597]: `c` does not live long enough
--> $DIR/adt-tuple-enums.rs:54:42
|
LL | fn annot_reference_named_lifetime_in_closure<'a>(_: &'a u32) {
| -- lifetime `'a` defined here
...
LL | SomeEnum::SomeVariant::<&'a u32>(&c); //~ ERROR
| ^^ borrowed value does not live long enough
| ^^
| |
| borrowed value does not live long enough
| requires that `c` is borrowed for `'a`
LL | };
| - `c` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 51:46...
--> $DIR/adt-tuple-enums.rs:51:46
|
LL | fn annot_reference_named_lifetime_in_closure<'a>(_: &'a u32) {
| ^^
error: aborting due to 3 previous errors
......
src/test/ui/nll/user-annotations/adt-tuple-struct.stderr
浏览文件 @ 31b97f78
......@@ -2,39 +2,40 @@ error[E0597]: `c` does not live long enough
--> $DIR/adt-tuple-struct.rs:35:32
|
LL | SomeStruct::<&'static u32>(&c); //~ ERROR
| ^^ borrowed value does not live long enough
| ^^
| |
| borrowed value does not live long enough
| requires that `c` is borrowed for `'static`
LL | }
| - `c` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
error[E0597]: `c` does not live long enough
--> $DIR/adt-tuple-struct.rs:40:27
|
LL | fn annot_reference_named_lifetime<'a>(_d: &'a u32) {
| -- lifetime `'a` defined here
LL | let c = 66;
LL | SomeStruct::<&'a u32>(&c); //~ ERROR
| ^^ borrowed value does not live long enough
| ^^
| |
| borrowed value does not live long enough
| requires that `c` is borrowed for `'a`
LL | }
| - `c` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 38:35...
--> $DIR/adt-tuple-struct.rs:38:35
|
LL | fn annot_reference_named_lifetime<'a>(_d: &'a u32) {
| ^^
error[E0597]: `c` does not live long enough
--> $DIR/adt-tuple-struct.rs:50:31
|
LL | fn annot_reference_named_lifetime_in_closure<'a>(_: &'a u32) {
| -- lifetime `'a` defined here
...
LL | SomeStruct::<&'a u32>(&c); //~ ERROR
| ^^ borrowed value does not live long enough
| ^^
| |
| borrowed value does not live long enough
| requires that `c` is borrowed for `'a`
LL | };
| - `c` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 47:46...
--> $DIR/adt-tuple-struct.rs:47:46
|
LL | fn annot_reference_named_lifetime_in_closure<'a>(_: &'a u32) {
| ^^
error: aborting due to 3 previous errors
......
src/test/ui/nll/user-annotations/cast_static_lifetime.stderr
浏览文件 @ 31b97f78
......@@ -2,11 +2,12 @@ error[E0597]: `x` does not live long enough
--> $DIR/cast_static_lifetime.rs:16:19
|
LL | let y: &u32 = (&x) as &'static u32;
| ^^^^ borrowed value does not live long enough
| ^^^^----------------
| |
| borrowed value does not live long enough
| type annotation requires that `x` is borrowed for `'static`
LL | }
| - `x` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
error: aborting due to previous error
......
src/test/ui/nll/user-annotations/fns.stderr
浏览文件 @ 31b97f78
......@@ -2,39 +2,40 @@ error[E0597]: `c` does not live long enough
--> $DIR/fns.rs:35:29
|
LL | some_fn::<&'static u32>(&c); //~ ERROR
| ^^ borrowed value does not live long enough
| ------------------------^^-
| | |
| | borrowed value does not live long enough
| argument requires that `c` is borrowed for `'static`
LL | }
| - `c` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
error[E0597]: `c` does not live long enough
--> $DIR/fns.rs:40:24
|
LL | fn annot_reference_named_lifetime<'a>(_d: &'a u32) {
| -- lifetime `'a` defined here
LL | let c = 66;
LL | some_fn::<&'a u32>(&c); //~ ERROR
| ^^ borrowed value does not live long enough
| -------------------^^-
| | |
| | borrowed value does not live long enough
| argument requires that `c` is borrowed for `'a`
LL | }
| - `c` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 38:35...
--> $DIR/fns.rs:38:35
|
LL | fn annot_reference_named_lifetime<'a>(_d: &'a u32) {
| ^^
error[E0597]: `c` does not live long enough
--> $DIR/fns.rs:50:28
|
LL | fn annot_reference_named_lifetime_in_closure<'a>(_: &'a u32) {
| -- lifetime `'a` defined here
...
LL | some_fn::<&'a u32>(&c); //~ ERROR
| ^^ borrowed value does not live long enough
| -------------------^^-
| | |
| | borrowed value does not live long enough
| argument requires that `c` is borrowed for `'a`
LL | };
| - `c` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 47:46...
--> $DIR/fns.rs:47:46
|
LL | fn annot_reference_named_lifetime_in_closure<'a>(_: &'a u32) {
| ^^
error: aborting due to 3 previous errors
......
src/test/ui/nll/user-annotations/method-call.stderr
浏览文件 @ 31b97f78
......@@ -2,39 +2,40 @@ error[E0597]: `c` does not live long enough
--> $DIR/method-call.rs:48:34
|
LL | a.method::<&'static u32>(b, &c); //~ ERROR
| ^^ borrowed value does not live long enough
| -----------------------------^^-
| | |
| | borrowed value does not live long enough
| argument requires that `c` is borrowed for `'static`
LL | }
| - `c` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
error[E0597]: `c` does not live long enough
--> $DIR/method-call.rs:55:29
|
LL | fn annot_reference_named_lifetime<'a>(_d: &'a u32) {
| -- lifetime `'a` defined here
...
LL | a.method::<&'a u32>(b, &c); //~ ERROR
| ^^ borrowed value does not live long enough
| ------------------------^^-
| | |
| | borrowed value does not live long enough
| argument requires that `c` is borrowed for `'a`
LL | }
| - `c` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 51:35...
--> $DIR/method-call.rs:51:35
|
LL | fn annot_reference_named_lifetime<'a>(_d: &'a u32) {
| ^^
error[E0597]: `c` does not live long enough
--> $DIR/method-call.rs:69:33
|
LL | fn annot_reference_named_lifetime_in_closure<'a>(_: &'a u32) {
| -- lifetime `'a` defined here
...
LL | a.method::<&'a u32>(b, &c); //~ ERROR
| ^^ borrowed value does not live long enough
| ------------------------^^-
| | |
| | borrowed value does not live long enough
| argument requires that `c` is borrowed for `'a`
LL | };
| - `c` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 64:46...
--> $DIR/method-call.rs:64:46
|
LL | fn annot_reference_named_lifetime_in_closure<'a>(_: &'a u32) {
| ^^
error: aborting due to 3 previous errors
......
src/test/ui/nll/user-annotations/method-ufcs-1.stderr
浏览文件 @ 31b97f78
......@@ -2,43 +2,44 @@ error[E0597]: `a` does not live long enough
--> $DIR/method-ufcs-1.rs:42:7
|
LL | x(&a, b, c); //~ ERROR
| ^^ borrowed value does not live long enough
| --^^-------
| | |
| | borrowed value does not live long enough
| argument requires that `a` is borrowed for `'static`
LL | }
| - `a` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
error[E0597]: `a` does not live long enough
--> $DIR/method-ufcs-1.rs:49:36
|
LL | fn annot_reference_named_lifetime<'a>(_d: &'a u32) {
| -- lifetime `'a` defined here
...
LL | <&'a u32 as Bazoom<_>>::method(&a, b, c); //~ ERROR
| ^^ borrowed value does not live long enough
| -------------------------------^^-------
| | |
| | borrowed value does not live long enough
| argument requires that `a` is borrowed for `'a`
LL | }
| - `a` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 45:35...
--> $DIR/method-ufcs-1.rs:45:35
|
LL | fn annot_reference_named_lifetime<'a>(_d: &'a u32) {
| ^^
error[E0597]: `a` does not live long enough
--> $DIR/method-ufcs-1.rs:63:41
|
LL | fn annot_reference_named_lifetime_in_closure<'a>(_: &'a u32) {
| -- lifetime `'a` defined here
...
LL | let _closure = || {
| -- value captured here
LL | let c = 66;
LL | <&'a u32 as Bazoom<_>>::method(&a, b, c); //~ ERROR
| ^ borrowed value does not live long enough
| --------------------------------^-------
| | |
| | borrowed value does not live long enough
| argument requires that `a` is borrowed for `'a`
LL | };
LL | }
| - `a` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 58:46...
--> $DIR/method-ufcs-1.rs:58:46
|
LL | fn annot_reference_named_lifetime_in_closure<'a>(_: &'a u32) {
| ^^
error: aborting due to 3 previous errors
......
src/test/ui/nll/user-annotations/method-ufcs-2.stderr
浏览文件 @ 31b97f78
......@@ -2,43 +2,44 @@ error[E0597]: `a` does not live long enough
--> $DIR/method-ufcs-2.rs:42:7
|
LL | x(&a, b, c); //~ ERROR
| ^^ borrowed value does not live long enough
| --^^-------
| | |
| | borrowed value does not live long enough
| argument requires that `a` is borrowed for `'static`
LL | }
| - `a` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
error[E0597]: `b` does not live long enough
--> $DIR/method-ufcs-2.rs:49:39
|
LL | fn annot_reference_named_lifetime<'a>(_d: &'a u32) {
| -- lifetime `'a` defined here
...
LL | <_ as Bazoom<&'a u32>>::method(a, &b, c); //~ ERROR
| ^^ borrowed value does not live long enough
| ----------------------------------^^----
| | |
| | borrowed value does not live long enough
| argument requires that `b` is borrowed for `'a`
LL | }
| - `b` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 45:35...
--> $DIR/method-ufcs-2.rs:45:35
|
LL | fn annot_reference_named_lifetime<'a>(_d: &'a u32) {
| ^^
error[E0597]: `b` does not live long enough
--> $DIR/method-ufcs-2.rs:63:44
|
LL | fn annot_reference_named_lifetime_in_closure<'a>(_: &'a u32) {
| -- lifetime `'a` defined here
...
LL | let _closure = || {
| -- value captured here
LL | let c = 66;
LL | <_ as Bazoom<&'a u32>>::method(a, &b, c); //~ ERROR
| ^ borrowed value does not live long enough
| -----------------------------------^----
| | |
| | borrowed value does not live long enough
| argument requires that `b` is borrowed for `'a`
LL | };
LL | }
| - `b` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 58:46...
--> $DIR/method-ufcs-2.rs:58:46
|
LL | fn annot_reference_named_lifetime_in_closure<'a>(_: &'a u32) {
| ^^
error: aborting due to 3 previous errors
......
src/test/ui/nll/user-annotations/method-ufcs-3.stderr
浏览文件 @ 31b97f78
......@@ -2,39 +2,40 @@ error[E0597]: `c` does not live long enough
--> $DIR/method-ufcs-3.rs:48:53
|
LL | <_ as Bazoom<_>>::method::<&'static u32>(&a, b, &c); //~ ERROR
| ^^ borrowed value does not live long enough
| ------------------------------------------------^^-
| | |
| | borrowed value does not live long enough
| argument requires that `c` is borrowed for `'static`
LL | }
| - `c` dropped here while still borrowed
|
= note: borrowed value must be valid for the static lifetime...
error[E0597]: `c` does not live long enough
--> $DIR/method-ufcs-3.rs:55:48
|
LL | fn annot_reference_named_lifetime<'a>(_d: &'a u32) {
| -- lifetime `'a` defined here
...
LL | <_ as Bazoom<_>>::method::<&'a u32>(&a, b, &c); //~ ERROR
| ^^ borrowed value does not live long enough
| -------------------------------------------^^-
| | |
| | borrowed value does not live long enough
| argument requires that `c` is borrowed for `'a`
LL | }
| - `c` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 51:35...
--> $DIR/method-ufcs-3.rs:51:35
|
LL | fn annot_reference_named_lifetime<'a>(_d: &'a u32) {
| ^^
error[E0597]: `c` does not live long enough
--> $DIR/method-ufcs-3.rs:69:52
|
LL | fn annot_reference_named_lifetime_in_closure<'a>(_: &'a u32) {
| -- lifetime `'a` defined here
...
LL | <_ as Bazoom<_>>::method::<&'a u32>(&a, b, &c); //~ ERROR
| ^^ borrowed value does not live long enough
| -------------------------------------------^^-
| | |
| | borrowed value does not live long enough
| argument requires that `c` is borrowed for `'a`
LL | };
| - `c` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 64:46...
--> $DIR/method-ufcs-3.rs:64:46
|
LL | fn annot_reference_named_lifetime_in_closure<'a>(_: &'a u32) {
| ^^
error: aborting due to 3 previous errors
......
src/test/ui/nll/user-annotations/method-ufcs-inherent-1.stderr
浏览文件 @ 31b97f78
error[E0597]: `v` does not live long enough
--> $DIR/method-ufcs-inherent-1.rs:16:26
|
LL | fn foo<'a>() {
| -- lifetime `'a` defined here
LL | let v = 22;
LL | let x = A::<'a>::new(&v, 22);
| ^^ borrowed value does not live long enough
| -------------^^-----
| | |
| | borrowed value does not live long enough
| argument requires that `v` is borrowed for `'a`
LL | //~^ ERROR
LL | }
| - `v` dropped here while still borrowed
|
note: borrowed value must be valid for the lifetime 'a as defined on the function body at 14:8...
--> $DIR/method-ufcs-inherent-1.rs:14:8
|
LL | fn foo<'a>() {
| ^^
error: aborting due to previous error
......
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