Use last segment

compiler/rustc_passes/src/stability.rs

@@ -828,10 +828,7 @@ fn visit_item(&mut self, item: &'tcx hir::Item<'tcx>) {
 
     fn visit_path(&mut self, path: &'tcx hir::Path<'tcx>, id: hir::HirId) {
         if let Some(def_id) = path.res.opt_def_id() {
-            let method_span = match path.segments {
-                [.., _, last] => Some(last.ident.span),
-                _ => None,
-            };
+            let method_span = path.segments.last().map(|s| s.ident.span);
             self.tcx.check_stability(def_id, Some(id), path.span, method_span)
         }
         intravisit::walk_path(self, path)

src/test/ui/deprecation/deprecation-lint-3.stderr

 error: use of deprecated function `deprecation_lint::deprecated_text`: text
-  --> $DIR/deprecation-lint-3.rs:13:5
+  --> $DIR/deprecation-lint-3.rs:13:28
    |
 LL |     macro_test_arg_nested!(deprecated_text);
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |                            ^^^^^^^^^^^^^^^
    |
 note: the lint level is defined here
   --> $DIR/deprecation-lint-3.rs:4:9
    |
 LL | #![deny(deprecated)]
    |         ^^^^^^^^^^
-   = note: this error originates in the macro `macro_test_arg_nested` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: aborting due to previous error
 

src/test/ui/lint/lint-stability3.stderr

 error: use of deprecated function `lint_stability::deprecated_text`: text
-  --> $DIR/lint-stability3.rs:13:5
+  --> $DIR/lint-stability3.rs:13:28
    |
 LL |     macro_test_arg_nested!(deprecated_text);
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |                            ^^^^^^^^^^^^^^^
    |
 note: the lint level is defined here
   --> $DIR/lint-stability3.rs:4:9
    |
 LL | #![deny(deprecated)]
    |         ^^^^^^^^^^
-   = note: this error originates in the macro `macro_test_arg_nested` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: aborting due to previous error
 

src/test/ui/stability-attribute/generics-default-stability.stderr

@@ -34,7 +34,7 @@ warning: use of deprecated struct `unstable_generic_param::Struct4`: test
   --> $DIR/generics-default-stability.rs:83:12
    |
 LL |     let _: Struct4<isize> = Struct4 { field: 1 };
-   |            ^^^^^^^^^^^^^^
+   |            ^^^^^^^
 
 warning: use of deprecated struct `unstable_generic_param::Struct4`: test
   --> $DIR/generics-default-stability.rs:88:12
@@ -46,7 +46,7 @@ warning: use of deprecated struct `unstable_generic_param::Struct4`: test
   --> $DIR/generics-default-stability.rs:89:12
    |
 LL |     let _: Struct4<usize> = STRUCT4;
-   |            ^^^^^^^^^^^^^^
+   |            ^^^^^^^
 
 warning: use of deprecated struct `unstable_generic_param::Struct4`: test
   --> $DIR/generics-default-stability.rs:90:29
@@ -58,7 +58,7 @@ warning: use of deprecated struct `unstable_generic_param::Struct4`: test
   --> $DIR/generics-default-stability.rs:90:12
    |
 LL |     let _: Struct4<isize> = Struct4 { field: 0 };
-   |            ^^^^^^^^^^^^^^
+   |            ^^^^^^^
 
 warning: use of deprecated struct `unstable_generic_param::Struct5`: test
   --> $DIR/generics-default-stability.rs:96:29
@@ -70,7 +70,7 @@ warning: use of deprecated struct `unstable_generic_param::Struct5`: test
   --> $DIR/generics-default-stability.rs:96:12
    |
 LL |     let _: Struct5<isize> = Struct5 { field: 1 };
-   |            ^^^^^^^^^^^^^^
+   |            ^^^^^^^
 
 warning: use of deprecated struct `unstable_generic_param::Struct5`: test
   --> $DIR/generics-default-stability.rs:101:12
@@ -82,7 +82,7 @@ warning: use of deprecated struct `unstable_generic_param::Struct5`: test
   --> $DIR/generics-default-stability.rs:102:12
    |
 LL |     let _: Struct5<usize> = STRUCT5;
-   |            ^^^^^^^^^^^^^^
+   |            ^^^^^^^
 
 warning: use of deprecated struct `unstable_generic_param::Struct5`: test
   --> $DIR/generics-default-stability.rs:104:29
@@ -94,7 +94,7 @@ warning: use of deprecated struct `unstable_generic_param::Struct5`: test
   --> $DIR/generics-default-stability.rs:104:12
    |
 LL |     let _: Struct5<isize> = Struct5 { field: 0 };
-   |            ^^^^^^^^^^^^^^
+   |            ^^^^^^^
 
 warning: use of deprecated type alias `unstable_generic_param::Alias4`: test
   --> $DIR/generics-default-stability.rs:159:28
@@ -106,7 +106,7 @@ warning: use of deprecated type alias `unstable_generic_param::Alias4`: test
   --> $DIR/generics-default-stability.rs:159:12
    |
 LL |     let _: Alias4<isize> = Alias4::Some(1);
-   |            ^^^^^^^^^^^^^
+   |            ^^^^^^
 
 warning: use of deprecated type alias `unstable_generic_param::Alias4`: test
   --> $DIR/generics-default-stability.rs:163:12
@@ -118,7 +118,7 @@ warning: use of deprecated type alias `unstable_generic_param::Alias4`: test
   --> $DIR/generics-default-stability.rs:164:12
    |
 LL |     let _: Alias4<usize> = ALIAS4;
-   |            ^^^^^^^^^^^^^
+   |            ^^^^^^
 
 warning: use of deprecated type alias `unstable_generic_param::Alias4`: test
   --> $DIR/generics-default-stability.rs:165:28
@@ -130,7 +130,7 @@ warning: use of deprecated type alias `unstable_generic_param::Alias4`: test
   --> $DIR/generics-default-stability.rs:165:12
    |
 LL |     let _: Alias4<isize> = Alias4::Some(0);
-   |            ^^^^^^^^^^^^^
+   |            ^^^^^^
 
 warning: use of deprecated type alias `unstable_generic_param::Alias5`: test
   --> $DIR/generics-default-stability.rs:170:28
@@ -142,7 +142,7 @@ warning: use of deprecated type alias `unstable_generic_param::Alias5`: test
   --> $DIR/generics-default-stability.rs:170:12
    |
 LL |     let _: Alias5<isize> = Alias5::Some(1);
-   |            ^^^^^^^^^^^^^
+   |            ^^^^^^
 
 warning: use of deprecated type alias `unstable_generic_param::Alias5`: test
   --> $DIR/generics-default-stability.rs:174:12
@@ -154,7 +154,7 @@ warning: use of deprecated type alias `unstable_generic_param::Alias5`: test
   --> $DIR/generics-default-stability.rs:175:12
    |
 LL |     let _: Alias5<usize> = ALIAS5;
-   |            ^^^^^^^^^^^^^
+   |            ^^^^^^
 
 warning: use of deprecated type alias `unstable_generic_param::Alias5`: test
   --> $DIR/generics-default-stability.rs:177:28
@@ -166,7 +166,7 @@ warning: use of deprecated type alias `unstable_generic_param::Alias5`: test
   --> $DIR/generics-default-stability.rs:177:12
    |
 LL |     let _: Alias5<isize> = Alias5::Some(0);
-   |            ^^^^^^^^^^^^^
+   |            ^^^^^^
 
 warning: use of deprecated variant `unstable_generic_param::Enum4::Some`: test
   --> $DIR/generics-default-stability.rs:231:34
@@ -178,7 +178,7 @@ warning: use of deprecated enum `unstable_generic_param::Enum4`: test
   --> $DIR/generics-default-stability.rs:231:12
    |
 LL |     let _: Enum4<isize> = Enum4::Some(1);
-   |            ^^^^^^^^^^^^
+   |            ^^^^^
 
 warning: use of deprecated enum `unstable_generic_param::Enum4`: test
   --> $DIR/generics-default-stability.rs:235:12
@@ -190,7 +190,7 @@ warning: use of deprecated enum `unstable_generic_param::Enum4`: test
   --> $DIR/generics-default-stability.rs:236:12
    |
 LL |     let _: Enum4<usize> = ENUM4;
-   |            ^^^^^^^^^^^^
+   |            ^^^^^
 
 warning: use of deprecated variant `unstable_generic_param::Enum4::Some`: test
   --> $DIR/generics-default-stability.rs:237:34
@@ -202,7 +202,7 @@ warning: use of deprecated enum `unstable_generic_param::Enum4`: test
   --> $DIR/generics-default-stability.rs:237:12
    |
 LL |     let _: Enum4<isize> = Enum4::Some(0);
-   |            ^^^^^^^^^^^^
+   |            ^^^^^
 
 warning: use of deprecated variant `unstable_generic_param::Enum5::Some`: test
   --> $DIR/generics-default-stability.rs:242:34
@@ -214,7 +214,7 @@ warning: use of deprecated enum `unstable_generic_param::Enum5`: test
   --> $DIR/generics-default-stability.rs:242:12
    |
 LL |     let _: Enum5<isize> = Enum5::Some(1);
-   |            ^^^^^^^^^^^^
+   |            ^^^^^
 
 warning: use of deprecated enum `unstable_generic_param::Enum5`: test
   --> $DIR/generics-default-stability.rs:246:12
@@ -226,7 +226,7 @@ warning: use of deprecated enum `unstable_generic_param::Enum5`: test
   --> $DIR/generics-default-stability.rs:247:12
    |
 LL |     let _: Enum5<usize> = ENUM5;
-   |            ^^^^^^^^^^^^
+   |            ^^^^^
 
 warning: use of deprecated variant `unstable_generic_param::Enum5::Some`: test
   --> $DIR/generics-default-stability.rs:249:34
@@ -238,7 +238,7 @@ warning: use of deprecated enum `unstable_generic_param::Enum5`: test
   --> $DIR/generics-default-stability.rs:249:12
    |
 LL |     let _: Enum5<isize> = Enum5::Some(0);
-   |            ^^^^^^^^^^^^
+   |            ^^^^^
 
 error[E0658]: use of unstable library feature 'unstable_default'
   --> $DIR/generics-default-stability.rs:35:20