borrowck `DefId` -> `LocalDefId`

src/librustc_mir/borrow_check/diagnostics/conflict_errors.rs

@@ -214,7 +214,7 @@ pub(in crate::borrow_check) fn report_use_of_moved_or_uninitialized(
                     let generics = tcx.generics_of(self.mir_def_id);
                     let param = generics.type_param(&param_ty, tcx);
                     if let Some(generics) =
-                        tcx.hir().get_generics(tcx.closure_base_def_id(self.mir_def_id))
+                        tcx.hir().get_generics(tcx.closure_base_def_id(self.mir_def_id.to_def_id()))
                     {
                         suggest_constraining_type_param(
                             tcx,
@@ -865,49 +865,42 @@ fn report_local_value_does_not_live_long_enough(
                 format!("`{}` would have to be valid for `{}`...", name, region_name),
             );
 
-            if let Some(def_id) = self.mir_def_id.as_local() {
-                let fn_hir_id = self.infcx.tcx.hir().as_local_hir_id(def_id);
-                err.span_label(
-                    drop_span,
-                    format!(
-                        "...but `{}` will be dropped here, when the {} returns",
-                        name,
-                        self.infcx
-                            .tcx
-                            .hir()
-                            .opt_name(fn_hir_id)
-                            .map(|name| format!("function `{}`", name))
-                            .unwrap_or_else(|| {
-                                match &self
-                                    .infcx
-                                    .tcx
-                                    .typeck_tables_of(def_id)
-                                    .node_type(fn_hir_id)
-                                    .kind
-                                {
-                                    ty::Closure(..) => "enclosing closure",
-                                    ty::Generator(..) => "enclosing generator",
-                                    kind => bug!("expected closure or generator, found {:?}", kind),
-                                }
-                                .to_string()
-                            })
-                    ),
-                );
+            let fn_hir_id = self.infcx.tcx.hir().as_local_hir_id(self.mir_def_id);
+            err.span_label(
+                drop_span,
+                format!(
+                    "...but `{}` will be dropped here, when the {} returns",
+                    name,
+                    self.infcx
+                        .tcx
+                        .hir()
+                        .opt_name(fn_hir_id)
+                        .map(|name| format!("function `{}`", name))
+                        .unwrap_or_else(|| {
+                            match &self
+                                .infcx
+                                .tcx
+                                .typeck_tables_of(self.mir_def_id)
+                                .node_type(fn_hir_id)
+                                .kind
+                            {
+                                ty::Closure(..) => "enclosing closure",
+                                ty::Generator(..) => "enclosing generator",
+                                kind => bug!("expected closure or generator, found {:?}", kind),
+                            }
+                            .to_string()
+                        })
+                ),
+            );
 
-                err.note(
-                    "functions cannot return a borrow to data owned within the function's scope, \
-                     functions can only return borrows to data passed as arguments",
-                );
-                err.note(
-                    "to learn more, visit <https://doc.rust-lang.org/book/ch04-02-\
-                     references-and-borrowing.html#dangling-references>",
-                );
-            } else {
-                err.span_label(
-                    drop_span,
-                    format!("...but `{}` dropped here while still borrowed", name),
-                );
-            }
+            err.note(
+                "functions cannot return a borrow to data owned within the function's scope, \
+                    functions can only return borrows to data passed as arguments",
+            );
+            err.note(
+                "to learn more, visit <https://doc.rust-lang.org/book/ch04-02-\
+                    references-and-borrowing.html#dangling-references>",
+            );
 
             if let BorrowExplanation::MustBeValidFor { .. } = explanation {
             } else {
@@ -1237,7 +1230,7 @@ fn report_escaping_data(
     ) -> DiagnosticBuilder<'cx> {
         let tcx = self.infcx.tcx;
 
-        let (_, escapes_from) = tcx.article_and_description(self.mir_def_id);
+        let (_, escapes_from) = tcx.article_and_description(self.mir_def_id.to_def_id());
 
         let mut err =
             borrowck_errors::borrowed_data_escapes_closure(tcx, escape_span, escapes_from);
@@ -1572,14 +1565,16 @@ fn annotate_argument_and_return_for_borrow(
     ) -> Option<AnnotatedBorrowFnSignature<'tcx>> {
         // Define a fallback for when we can't match a closure.
         let fallback = || {
-            let is_closure = self.infcx.tcx.is_closure(self.mir_def_id);
+            let is_closure = self.infcx.tcx.is_closure(self.mir_def_id.to_def_id());
             if is_closure {
                 None
             } else {
                 let ty = self.infcx.tcx.type_of(self.mir_def_id);
                 match ty.kind {
-                    ty::FnDef(_, _) | ty::FnPtr(_) => self
-                        .annotate_fn_sig(self.mir_def_id, self.infcx.tcx.fn_sig(self.mir_def_id)),
+                    ty::FnDef(_, _) | ty::FnPtr(_) => self.annotate_fn_sig(
+                        self.mir_def_id.to_def_id(),
+                        self.infcx.tcx.fn_sig(self.mir_def_id),
+                    ),
                     _ => None,
                 }
             }

src/librustc_mir/borrow_check/diagnostics/move_errors.rs

@@ -331,7 +331,7 @@ fn report_cannot_move_from_borrowed_content(
                 self.cannot_move_out_of_interior_noncopy(span, ty, None)
             }
             ty::Closure(def_id, closure_substs)
-                if def_id == self.mir_def_id && upvar_field.is_some() =>
+                if def_id.as_local() == Some(self.mir_def_id) && upvar_field.is_some() =>
             {
                 let closure_kind_ty = closure_substs.as_closure().kind_ty();
                 let closure_kind = closure_kind_ty.to_opt_closure_kind();

src/librustc_mir/borrow_check/diagnostics/mutability_errors.rs

@@ -492,7 +492,7 @@ fn expected_fn_found_fn_mut_call(&self, err: &mut DiagnosticBuilder<'_>, sp: Spa
         err.span_label(sp, format!("cannot {}", act));
 
         let hir = self.infcx.tcx.hir();
-        let closure_id = hir.as_local_hir_id(self.mir_def_id.expect_local());
+        let closure_id = hir.as_local_hir_id(self.mir_def_id);
         let fn_call_id = hir.get_parent_node(closure_id);
         let node = hir.get(fn_call_id);
         let item_id = hir.get_parent_item(fn_call_id);

src/librustc_mir/borrow_check/diagnostics/region_errors.rs

@@ -502,7 +502,7 @@ fn report_general_error(&self, errci: &ErrorConstraintInfo) -> DiagnosticBuilder
         let mut diag =
             self.infcx.tcx.sess.struct_span_err(*span, "lifetime may not live long enough");
 
-        let (_, mir_def_name) = self.infcx.tcx.article_and_description(self.mir_def_id);
+        let (_, mir_def_name) = self.infcx.tcx.article_and_description(self.mir_def_id.to_def_id());
 
         let fr_name = self.give_region_a_name(*fr).unwrap();
         fr_name.highlight_region_name(&mut diag);

src/librustc_mir/borrow_check/diagnostics/region_name.rs

@@ -237,8 +237,7 @@ fn give_name_from_error_region(&self, fr: RegionVid) -> Option<RegionName> {
                 }
 
                 ty::BoundRegion::BrEnv => {
-                    let mir_hir_id =
-                        self.infcx.tcx.hir().as_local_hir_id(self.mir_def_id.expect_local());
+                    let mir_hir_id = self.infcx.tcx.hir().as_local_hir_id(self.mir_def_id);
                     let def_ty = self.regioncx.universal_regions().defining_ty;
 
                     if let DefiningTy::Closure(_, substs) = def_ty {
@@ -324,7 +323,7 @@ fn give_name_if_we_can_match_hir_ty_from_argument(
         argument_ty: Ty<'tcx>,
         argument_index: usize,
     ) -> Option<RegionName> {
-        let mir_hir_id = self.infcx.tcx.hir().as_local_hir_id(self.mir_def_id.as_local()?);
+        let mir_hir_id = self.infcx.tcx.hir().as_local_hir_id(self.mir_def_id);
         let fn_decl = self.infcx.tcx.hir().fn_decl_by_hir_id(mir_hir_id)?;
         let argument_hir_ty: &hir::Ty<'_> = fn_decl.inputs.get(argument_index)?;
         match argument_hir_ty.kind {
@@ -635,7 +634,7 @@ fn give_name_if_anonymous_region_appears_in_output(&self, fr: RegionVid) -> Opti
         highlight.highlighting_region_vid(fr, *self.next_region_name.try_borrow().unwrap());
         let type_name = self.infcx.extract_type_name(&return_ty, Some(highlight)).0;
 
-        let mir_hir_id = tcx.hir().as_local_hir_id(self.mir_def_id.expect_local());
+        let mir_hir_id = tcx.hir().as_local_hir_id(self.mir_def_id);
 
         let (return_span, mir_description) = match tcx.hir().get(mir_hir_id) {
             hir::Node::Expr(hir::Expr {
@@ -687,7 +686,7 @@ fn give_name_if_anonymous_region_appears_in_yield_ty(
         highlight.highlighting_region_vid(fr, *self.next_region_name.try_borrow().unwrap());
         let type_name = self.infcx.extract_type_name(&yield_ty, Some(highlight)).0;
 
-        let mir_hir_id = tcx.hir().as_local_hir_id(self.mir_def_id.expect_local());
+        let mir_hir_id = tcx.hir().as_local_hir_id(self.mir_def_id);
 
         let yield_span = match tcx.hir().get(mir_hir_id) {
             hir::Node::Expr(hir::Expr {

src/librustc_mir/borrow_check/mod.rs

@@ -4,10 +4,8 @@
 use rustc_data_structures::graph::dominators::Dominators;
 use rustc_errors::{Applicability, Diagnostic, DiagnosticBuilder, ErrorReported};
 use rustc_hir as hir;
-use rustc_hir::{
-    def_id::{DefId, LocalDefId},
-    HirId, Node,
-};
+use rustc_hir::def_id::LocalDefId;
+use rustc_hir::{HirId, Node};
 use rustc_index::bit_set::BitSet;
 use rustc_index::vec::IndexVec;
 use rustc_infer::infer::{InferCtxt, TyCtxtInferExt};
@@ -174,7 +172,7 @@ fn do_mir_borrowck<'a, 'tcx>(
     let mut body = input_body.clone();
     let mut promoted = input_promoted.clone();
     let free_regions =
-        nll::replace_regions_in_mir(infcx, def_id.to_def_id(), param_env, &mut body, &mut promoted);
+        nll::replace_regions_in_mir(infcx, def_id, param_env, &mut body, &mut promoted);
     let body = &body; // no further changes
 
     let location_table = &LocationTable::new(&body);
@@ -275,7 +273,7 @@ fn do_mir_borrowck<'a, 'tcx>(
             let mut promoted_mbcx = MirBorrowckCtxt {
                 infcx,
                 body: promoted_body,
-                mir_def_id: def_id.to_def_id(),
+                mir_def_id: def_id,
                 move_data: &move_data,
                 location_table: &LocationTable::new(promoted_body),
                 movable_generator,
@@ -307,7 +305,7 @@ fn do_mir_borrowck<'a, 'tcx>(
     let mut mbcx = MirBorrowckCtxt {
         infcx,
         body,
-        mir_def_id: def_id.to_def_id(),
+        mir_def_id: def_id,
         move_data: &mdpe.move_data,
         location_table,
         movable_generator,
@@ -459,7 +457,7 @@ fn do_mir_borrowck<'a, 'tcx>(
 crate struct MirBorrowckCtxt<'cx, 'tcx> {
     crate infcx: &'cx InferCtxt<'cx, 'tcx>,
     body: &'cx Body<'tcx>,
-    mir_def_id: DefId,
+    mir_def_id: LocalDefId,
     move_data: &'cx MoveData<'tcx>,
 
     /// Map from MIR `Location` to `LocationIndex`; created

src/librustc_mir/borrow_check/nll.rs

@@ -2,7 +2,7 @@
 
 use rustc_data_structures::fx::FxHashMap;
 use rustc_errors::Diagnostic;
-use rustc_hir::def_id::DefId;
+use rustc_hir::def_id::{DefId, LocalDefId};
 use rustc_index::vec::IndexVec;
 use rustc_infer::infer::InferCtxt;
 use rustc_middle::mir::{
@@ -58,7 +58,7 @@
 /// `compute_regions`.
 pub(in crate::borrow_check) fn replace_regions_in_mir<'cx, 'tcx>(
     infcx: &InferCtxt<'cx, 'tcx>,
-    def_id: DefId,
+    def_id: LocalDefId,
     param_env: ty::ParamEnv<'tcx>,
     body: &mut Body<'tcx>,
     promoted: &mut IndexVec<Promoted, Body<'tcx>>,
@@ -66,12 +66,12 @@ pub(in crate::borrow_check) fn replace_regions_in_mir<'cx, 'tcx>(
     debug!("replace_regions_in_mir(def_id={:?})", def_id);
 
     // Compute named region information. This also renumbers the inputs/outputs.
-    let universal_regions = UniversalRegions::new(infcx, def_id.expect_local(), param_env);
+    let universal_regions = UniversalRegions::new(infcx, def_id, param_env);
 
     // Replace all remaining regions with fresh inference variables.
     renumber::renumber_mir(infcx, body, promoted);
 
-    let source = MirSource::item(def_id);
+    let source = MirSource::item(def_id.to_def_id());
     mir_util::dump_mir(infcx.tcx, None, "renumber", &0, source, body, |_, _| Ok(()));
 
     universal_regions