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Cleaned up unused labels

Browse source 
Deleted unused labels from compiler and fixed or allowed
unused labels in tests. This patch removes some gratuitous
unused labels and turns off the warning for unused labels
that are a necessary part of tests.  This will permit
setting the `unused_labels` lint to `warn`.
This commit is contained in:
Bart Massey 2019-11-12 03:19:40 -08:00
parent 1bd30ce2aa
commit ed56f86781
12 changed files with 67 additions and 64 deletions
Download patch file Download diff file Expand all files Collapse all files

2
src/librustc/ty/layout.rs
View file

@ -2557,7 +2557,7 @@ where
'descend_newtypes: while !fat_pointer_layout.ty.is_unsafe_ptr() 'descend_newtypes: while !fat_pointer_layout.ty.is_unsafe_ptr()
&& !fat_pointer_layout.ty.is_region_ptr() && !fat_pointer_layout.ty.is_region_ptr()
{ {
'iter_fields: for i in 0..fat_pointer_layout.fields.count() { for i in 0..fat_pointer_layout.fields.count() {
let field_layout = fat_pointer_layout.field(cx, i); let field_layout = fat_pointer_layout.field(cx, i);
if !field_layout.is_zst() { if !field_layout.is_zst() {

2
src/librustc_codegen_ssa/mir/block.rs
View file

@ -721,7 +721,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
'descend_newtypes: while !op.layout.ty.is_unsafe_ptr() 'descend_newtypes: while !op.layout.ty.is_unsafe_ptr()
&& !op.layout.ty.is_region_ptr() && !op.layout.ty.is_region_ptr()
{ {
'iter_fields: for i in 0..op.layout.fields.count() { for i in 0..op.layout.fields.count() {
let field = op.extract_field(&mut bx, i); let field = op.extract_field(&mut bx, i);
if !field.layout.is_zst() { if !field.layout.is_zst() {
// we found the one non-zero-sized field that is allowed // we found the one non-zero-sized field that is allowed

2
src/librustc_mir/borrow_check/nll/type_check/liveness/trace.rs
View file

@ -249,7 +249,7 @@ impl LivenessResults<'me, 'typeck, 'flow, 'tcx> {
// Reverse DFS. But for drops, we do it a bit differently. // Reverse DFS. But for drops, we do it a bit differently.
// The stack only ever stores *terminators of blocks*. Within // The stack only ever stores *terminators of blocks*. Within
// a block, we walk back the statements in an inner loop. // a block, we walk back the statements in an inner loop.
'next_block: while let Some(term_point) = self.stack.pop() { while let Some(term_point) = self.stack.pop() {
self.compute_drop_live_points_for_block(mpi, term_point); self.compute_drop_live_points_for_block(mpi, term_point);
} }
} }

4
src/libstd/keyword_docs.rs
View file

@ -57,7 +57,7 @@ mod as_keyword { }
/// 'outer: for i in 1..=5 { /// 'outer: for i in 1..=5 {
/// println!("outer iteration (i): {}", i); /// println!("outer iteration (i): {}", i);
/// ///
/// 'inner: for j in 1..=200 { /// '_inner: for j in 1..=200 {
/// println!(" inner iteration (j): {}", j); /// println!(" inner iteration (j): {}", j);
/// if j >= 3 { /// if j >= 3 {
/// // breaks from inner loop, let's outer loop continue. /// // breaks from inner loop, let's outer loop continue.
@ -178,7 +178,7 @@ mod const_keyword { }
///```rust ///```rust
/// // Print Odd numbers under 30 with unit <= 5 /// // Print Odd numbers under 30 with unit <= 5
/// 'tens: for ten in 0..3 { /// 'tens: for ten in 0..3 {
/// 'units: for unit in 0..=9 { /// '_units: for unit in 0..=9 {
/// if unit % 2 == 0 { /// if unit % 2 == 0 {
/// continue; /// continue;
/// } /// }

2
src/test/ui/for-loop-while/label_break_value.rs
View file

@ -77,7 +77,7 @@ fn label_break_mixed(v: u32) -> u32 {
} }
// Labeled breaking an outer loop still works // Labeled breaking an outer loop still works
'd: loop { 'd: loop {
'e: { {
if v == r { if v == r {
break 'b; break 'b;
} }

1
src/test/ui/for-loop-while/loop-label-shadowing.rs
View file

@ -5,6 +5,7 @@
fn main() { fn main() {
let mut foo = Vec::new(); let mut foo = Vec::new();
#[allow(unused_labels)]
'foo: for i in &[1, 2, 3] { 'foo: for i in &[1, 2, 3] {
foo.push(*i); foo.push(*i);
} }

1
src/test/ui/hygiene/hygienic-labels-in-let.rs
View file

@ -1,5 +1,6 @@
// run-pass // run-pass
#![allow(unreachable_code)] #![allow(unreachable_code)]
#![allow(unused_labels)]
// Test that labels injected by macros do not break hygiene. This // Test that labels injected by macros do not break hygiene. This
// checks cases where the macros invocations are under the rhs of a // checks cases where the macros invocations are under the rhs of a

56
src/test/ui/hygiene/hygienic-labels-in-let.stderr
View file

@ -1,5 +1,5 @@
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:15:9 --> $DIR/hygienic-labels-in-let.rs:16:9
| |
LL | 'x: loop { $e } LL | 'x: loop { $e }
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
@ -11,7 +11,7 @@ LL | loop_x!(break 'x);
| ------------------ in this macro invocation | ------------------ in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:63:9 --> $DIR/hygienic-labels-in-let.rs:64:9
| |
LL | 'x: loop { LL | 'x: loop {
| -- first declared here | -- first declared here
@ -20,7 +20,7 @@ LL | 'x: for _ in 0..1 {
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:63:9 --> $DIR/hygienic-labels-in-let.rs:64:9
| |
LL | 'x: loop { $e } LL | 'x: loop { $e }
| -- first declared here | -- first declared here
@ -29,7 +29,7 @@ LL | 'x: for _ in 0..1 {
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:15:9 --> $DIR/hygienic-labels-in-let.rs:16:9
| |
LL | 'x: loop { $e } LL | 'x: loop { $e }
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
@ -41,7 +41,7 @@ LL | loop_x!(break 'x);
| ------------------ in this macro invocation | ------------------ in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:15:9 --> $DIR/hygienic-labels-in-let.rs:16:9
| |
LL | 'x: loop { $e } LL | 'x: loop { $e }
| ^^ | ^^
@ -53,7 +53,7 @@ LL | loop_x!(break 'x);
| ------------------ in this macro invocation | ------------------ in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:15:9 --> $DIR/hygienic-labels-in-let.rs:16:9
| |
LL | 'x: loop { $e } LL | 'x: loop { $e }
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
@ -65,7 +65,7 @@ LL | loop_x!(break 'x);
| ------------------ in this macro invocation | ------------------ in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:75:9 --> $DIR/hygienic-labels-in-let.rs:76:9
| |
LL | 'x: loop { LL | 'x: loop {
| -- first declared here | -- first declared here
@ -74,7 +74,7 @@ LL | 'x: for _ in 0..1 {
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:75:9 --> $DIR/hygienic-labels-in-let.rs:76:9
| |
LL | 'x: loop { $e } LL | 'x: loop { $e }
| -- first declared here | -- first declared here
@ -83,7 +83,7 @@ LL | 'x: for _ in 0..1 {
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:75:9 --> $DIR/hygienic-labels-in-let.rs:76:9
| |
LL | 'x: for _ in 0..1 { LL | 'x: for _ in 0..1 {
| -- first declared here | -- first declared here
@ -92,7 +92,7 @@ LL | 'x: for _ in 0..1 {
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:75:9 --> $DIR/hygienic-labels-in-let.rs:76:9
| |
LL | 'x: loop { $e } LL | 'x: loop { $e }
| -- first declared here | -- first declared here
@ -101,7 +101,7 @@ LL | 'x: for _ in 0..1 {
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:26:9 --> $DIR/hygienic-labels-in-let.rs:27:9
| |
LL | 'x: while 1 + 1 == 2 { $e } LL | 'x: while 1 + 1 == 2 { $e }
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
@ -113,7 +113,7 @@ LL | while_true!(break 'x);
| ---------------------- in this macro invocation | ---------------------- in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:26:9 --> $DIR/hygienic-labels-in-let.rs:27:9
| |
LL | 'x: loop { $e } LL | 'x: loop { $e }
| -- first declared here | -- first declared here
@ -125,7 +125,7 @@ LL | while_true!(break 'x);
| ---------------------- in this macro invocation | ---------------------- in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:26:9 --> $DIR/hygienic-labels-in-let.rs:27:9
| |
LL | 'x: while 1 + 1 == 2 { $e } LL | 'x: while 1 + 1 == 2 { $e }
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
@ -137,7 +137,7 @@ LL | while_true!(break 'x);
| ---------------------- in this macro invocation | ---------------------- in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:26:9 --> $DIR/hygienic-labels-in-let.rs:27:9
| |
LL | 'x: loop { $e } LL | 'x: loop { $e }
| -- first declared here | -- first declared here
@ -149,7 +149,7 @@ LL | while_true!(break 'x);
| ---------------------- in this macro invocation | ---------------------- in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:26:9 --> $DIR/hygienic-labels-in-let.rs:27:9
| |
LL | 'x: while 1 + 1 == 2 { $e } LL | 'x: while 1 + 1 == 2 { $e }
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
@ -161,7 +161,7 @@ LL | while_true!(break 'x);
| ---------------------- in this macro invocation | ---------------------- in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:89:9 --> $DIR/hygienic-labels-in-let.rs:90:9
| |
LL | 'x: loop { LL | 'x: loop {
| -- first declared here | -- first declared here
@ -170,7 +170,7 @@ LL | 'x: for _ in 0..1 {
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:89:9 --> $DIR/hygienic-labels-in-let.rs:90:9
| |
LL | 'x: loop { $e } LL | 'x: loop { $e }
| -- first declared here | -- first declared here
@ -179,7 +179,7 @@ LL | 'x: for _ in 0..1 {
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:89:9 --> $DIR/hygienic-labels-in-let.rs:90:9
| |
LL | 'x: for _ in 0..1 { LL | 'x: for _ in 0..1 {
| -- first declared here | -- first declared here
@ -188,7 +188,7 @@ LL | 'x: for _ in 0..1 {
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:89:9 --> $DIR/hygienic-labels-in-let.rs:90:9
| |
LL | 'x: loop { $e } LL | 'x: loop { $e }
| -- first declared here | -- first declared here
@ -197,7 +197,7 @@ LL | 'x: for _ in 0..1 {
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:89:9 --> $DIR/hygienic-labels-in-let.rs:90:9
| |
LL | 'x: for _ in 0..1 { LL | 'x: for _ in 0..1 {
| -- first declared here | -- first declared here
@ -206,7 +206,7 @@ LL | 'x: for _ in 0..1 {
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:89:9 --> $DIR/hygienic-labels-in-let.rs:90:9
| |
LL | 'x: while 1 + 1 == 2 { $e } LL | 'x: while 1 + 1 == 2 { $e }
| -- first declared here | -- first declared here
@ -215,7 +215,7 @@ LL | 'x: for _ in 0..1 {
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:38:9 --> $DIR/hygienic-labels-in-let.rs:39:9
| |
LL | 'x: for _ in 0..1 { $e } LL | 'x: for _ in 0..1 { $e }
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
@ -227,7 +227,7 @@ LL | run_once!(continue 'x);
| ----------------------- in this macro invocation | ----------------------- in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:38:9 --> $DIR/hygienic-labels-in-let.rs:39:9
| |
LL | 'x: loop { $e } LL | 'x: loop { $e }
| -- first declared here | -- first declared here
@ -239,7 +239,7 @@ LL | run_once!(continue 'x);
| ----------------------- in this macro invocation | ----------------------- in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:38:9 --> $DIR/hygienic-labels-in-let.rs:39:9
| |
LL | 'x: for _ in 0..1 { $e } LL | 'x: for _ in 0..1 { $e }
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
@ -251,7 +251,7 @@ LL | run_once!(continue 'x);
| ----------------------- in this macro invocation | ----------------------- in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:38:9 --> $DIR/hygienic-labels-in-let.rs:39:9
| |
LL | 'x: loop { $e } LL | 'x: loop { $e }
| -- first declared here | -- first declared here
@ -263,7 +263,7 @@ LL | run_once!(continue 'x);
| ----------------------- in this macro invocation | ----------------------- in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:38:9 --> $DIR/hygienic-labels-in-let.rs:39:9
| |
LL | 'x: for _ in 0..1 { $e } LL | 'x: for _ in 0..1 { $e }
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
@ -275,7 +275,7 @@ LL | run_once!(continue 'x);
| ----------------------- in this macro invocation | ----------------------- in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:38:9 --> $DIR/hygienic-labels-in-let.rs:39:9
| |
LL | 'x: while 1 + 1 == 2 { $e } LL | 'x: while 1 + 1 == 2 { $e }
| -- first declared here | -- first declared here
@ -287,7 +287,7 @@ LL | run_once!(continue 'x);
| ----------------------- in this macro invocation | ----------------------- in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels-in-let.rs:38:9 --> $DIR/hygienic-labels-in-let.rs:39:9
| |
LL | 'x: for _ in 0..1 { $e } LL | 'x: for _ in 0..1 { $e }
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope

1
src/test/ui/hygiene/hygienic-labels.rs
View file

@ -1,5 +1,6 @@
// run-pass // run-pass
#![allow(unreachable_code)] #![allow(unreachable_code)]
#![allow(unused_labels)]
// Test that labels injected by macros do not break hygiene. // Test that labels injected by macros do not break hygiene.
// Issue #24278: The label/lifetime shadowing checker from #24162 // Issue #24278: The label/lifetime shadowing checker from #24162

56
src/test/ui/hygiene/hygienic-labels.stderr
View file

@ -1,5 +1,5 @@
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:12:9 --> $DIR/hygienic-labels.rs:13:9
| |
LL | 'x: loop { $e } LL | 'x: loop { $e }
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
@ -11,7 +11,7 @@ LL | loop_x!(break 'x);
| ------------------ in this macro invocation | ------------------ in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:53:5 --> $DIR/hygienic-labels.rs:54:5
| |
LL | 'x: for _ in 0..1 { LL | 'x: for _ in 0..1 {
| -- first declared here | -- first declared here
@ -20,7 +20,7 @@ LL | 'x: loop {
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:53:5 --> $DIR/hygienic-labels.rs:54:5
| |
LL | 'x: loop { $e } LL | 'x: loop { $e }
| -- first declared here | -- first declared here
@ -29,7 +29,7 @@ LL | 'x: loop {
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:12:9 --> $DIR/hygienic-labels.rs:13:9
| |
LL | 'x: loop { $e } LL | 'x: loop { $e }
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
@ -41,7 +41,7 @@ LL | loop_x!(break 'x);
| ------------------ in this macro invocation | ------------------ in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:12:9 --> $DIR/hygienic-labels.rs:13:9
| |
LL | 'x: loop { $e } LL | 'x: loop { $e }
| ^^ | ^^
@ -53,7 +53,7 @@ LL | loop_x!(break 'x);
| ------------------ in this macro invocation | ------------------ in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:12:9 --> $DIR/hygienic-labels.rs:13:9
| |
LL | 'x: loop { $e } LL | 'x: loop { $e }
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
@ -65,7 +65,7 @@ LL | loop_x!(break 'x);
| ------------------ in this macro invocation | ------------------ in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:62:5 --> $DIR/hygienic-labels.rs:63:5
| |
LL | 'x: for _ in 0..1 { LL | 'x: for _ in 0..1 {
| -- first declared here | -- first declared here
@ -74,7 +74,7 @@ LL | 'x: while 1 + 1 == 2 {
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:62:5 --> $DIR/hygienic-labels.rs:63:5
| |
LL | 'x: loop { $e } LL | 'x: loop { $e }
| -- first declared here | -- first declared here
@ -83,7 +83,7 @@ LL | 'x: while 1 + 1 == 2 {
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:62:5 --> $DIR/hygienic-labels.rs:63:5
| |
LL | 'x: loop { LL | 'x: loop {
| -- first declared here | -- first declared here
@ -92,7 +92,7 @@ LL | 'x: while 1 + 1 == 2 {
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:62:5 --> $DIR/hygienic-labels.rs:63:5
| |
LL | 'x: loop { $e } LL | 'x: loop { $e }
| -- first declared here | -- first declared here
@ -101,7 +101,7 @@ LL | 'x: while 1 + 1 == 2 {
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:37:9 --> $DIR/hygienic-labels.rs:38:9
| |
LL | 'x: while 1 + 1 == 2 { $e } LL | 'x: while 1 + 1 == 2 { $e }
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
@ -113,7 +113,7 @@ LL | while_x!(break 'x);
| ------------------- in this macro invocation | ------------------- in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:37:9 --> $DIR/hygienic-labels.rs:38:9
| |
LL | 'x: loop { $e } LL | 'x: loop { $e }
| -- first declared here | -- first declared here
@ -125,7 +125,7 @@ LL | while_x!(break 'x);
| ------------------- in this macro invocation | ------------------- in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:37:9 --> $DIR/hygienic-labels.rs:38:9
| |
LL | 'x: while 1 + 1 == 2 { $e } LL | 'x: while 1 + 1 == 2 { $e }
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
@ -137,7 +137,7 @@ LL | while_x!(break 'x);
| ------------------- in this macro invocation | ------------------- in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:37:9 --> $DIR/hygienic-labels.rs:38:9
| |
LL | 'x: loop { $e } LL | 'x: loop { $e }
| -- first declared here | -- first declared here
@ -149,7 +149,7 @@ LL | while_x!(break 'x);
| ------------------- in this macro invocation | ------------------- in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:37:9 --> $DIR/hygienic-labels.rs:38:9
| |
LL | 'x: while 1 + 1 == 2 { $e } LL | 'x: while 1 + 1 == 2 { $e }
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
@ -161,7 +161,7 @@ LL | while_x!(break 'x);
| ------------------- in this macro invocation | ------------------- in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:72:5 --> $DIR/hygienic-labels.rs:73:5
| |
LL | 'x: for _ in 0..1 { LL | 'x: for _ in 0..1 {
| -- first declared here | -- first declared here
@ -170,7 +170,7 @@ LL | 'x: for _ in 0..1 {
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:72:5 --> $DIR/hygienic-labels.rs:73:5
| |
LL | 'x: loop { $e } LL | 'x: loop { $e }
| -- first declared here | -- first declared here
@ -179,7 +179,7 @@ LL | 'x: for _ in 0..1 {
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:72:5 --> $DIR/hygienic-labels.rs:73:5
| |
LL | 'x: loop { LL | 'x: loop {
| -- first declared here | -- first declared here
@ -188,7 +188,7 @@ LL | 'x: for _ in 0..1 {
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:72:5 --> $DIR/hygienic-labels.rs:73:5
| |
LL | 'x: loop { $e } LL | 'x: loop { $e }
| -- first declared here | -- first declared here
@ -197,7 +197,7 @@ LL | 'x: for _ in 0..1 {
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:72:5 --> $DIR/hygienic-labels.rs:73:5
| |
LL | 'x: while 1 + 1 == 2 { LL | 'x: while 1 + 1 == 2 {
| -- first declared here | -- first declared here
@ -206,7 +206,7 @@ LL | 'x: for _ in 0..1 {
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:72:5 --> $DIR/hygienic-labels.rs:73:5
| |
LL | 'x: while 1 + 1 == 2 { $e } LL | 'x: while 1 + 1 == 2 { $e }
| -- first declared here | -- first declared here
@ -215,7 +215,7 @@ LL | 'x: for _ in 0..1 {
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:23:9 --> $DIR/hygienic-labels.rs:24:9
| |
LL | 'x: for _ in 0..1 { $e } LL | 'x: for _ in 0..1 { $e }
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
@ -227,7 +227,7 @@ LL | run_once!(continue 'x);
| ----------------------- in this macro invocation | ----------------------- in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:23:9 --> $DIR/hygienic-labels.rs:24:9
| |
LL | 'x: loop { $e } LL | 'x: loop { $e }
| -- first declared here | -- first declared here
@ -239,7 +239,7 @@ LL | run_once!(continue 'x);
| ----------------------- in this macro invocation | ----------------------- in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:23:9 --> $DIR/hygienic-labels.rs:24:9
| |
LL | 'x: for _ in 0..1 { $e } LL | 'x: for _ in 0..1 { $e }
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
@ -251,7 +251,7 @@ LL | run_once!(continue 'x);
| ----------------------- in this macro invocation | ----------------------- in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:23:9 --> $DIR/hygienic-labels.rs:24:9
| |
LL | 'x: loop { $e } LL | 'x: loop { $e }
| -- first declared here | -- first declared here
@ -263,7 +263,7 @@ LL | run_once!(continue 'x);
| ----------------------- in this macro invocation | ----------------------- in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:23:9 --> $DIR/hygienic-labels.rs:24:9
| |
LL | 'x: for _ in 0..1 { $e } LL | 'x: for _ in 0..1 { $e }
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
@ -275,7 +275,7 @@ LL | run_once!(continue 'x);
| ----------------------- in this macro invocation | ----------------------- in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:23:9 --> $DIR/hygienic-labels.rs:24:9
| |
LL | 'x: for _ in 0..1 { $e } LL | 'x: for _ in 0..1 { $e }
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope
@ -287,7 +287,7 @@ LL | run_once!(continue 'x);
| ----------------------- in this macro invocation | ----------------------- in this macro invocation
warning: label name `'x` shadows a label name that is already in scope warning: label name `'x` shadows a label name that is already in scope
--> $DIR/hygienic-labels.rs:23:9 --> $DIR/hygienic-labels.rs:24:9
| |
LL | 'x: for _ in 0..1 { $e } LL | 'x: for _ in 0..1 { $e }
| ^^ lifetime 'x already in scope | ^^ lifetime 'x already in scope

2
src/test/ui/issues/issue-2216.rs
View file

@ -5,7 +5,7 @@ pub fn main() {
'foo: loop { 'foo: loop {
'bar: loop { 'bar: loop {
'quux: loop { loop {
if 1 == 2 { if 1 == 2 {
break 'foo; break 'foo;
} }

2
src/test/ui/macros/macro-lifetime-used-with-labels.rs
View file

@ -1,6 +1,6 @@
// run-pass // run-pass
#![allow(stable_features)] #![allow(stable_features)]
#![allow(unused_labels)]
#![allow(unreachable_code)] #![allow(unreachable_code)]
macro_rules! x { macro_rules! x {