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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/loops/loop-proper-liveness.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/loops/loop-proper-liveness.rs')
-rw-r--r-- | src/test/ui/loops/loop-proper-liveness.rs | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/src/test/ui/loops/loop-proper-liveness.rs b/src/test/ui/loops/loop-proper-liveness.rs new file mode 100644 index 000000000..6546e3977 --- /dev/null +++ b/src/test/ui/loops/loop-proper-liveness.rs @@ -0,0 +1,32 @@ +fn test1() { + // In this test the outer 'a loop may terminate without `x` getting initialised. Although the + // `x = loop { ... }` statement is reached, the value itself ends up never being computed and + // thus leaving `x` uninit. + let x: i32; + 'a: loop { + x = loop { break 'a }; + } + println!("{:?}", x); //~ ERROR E0381 +} + +// test2 and test3 should not fail. +fn test2() { + // In this test the `'a` loop will never terminate thus making the use of `x` unreachable. + let x: i32; + 'a: loop { + x = loop { continue 'a }; + } + println!("{:?}", x); +} + +fn test3() { + let x: i32; + // Similarly, the use of variable `x` is unreachable. + 'a: loop { + x = loop { return }; + } + println!("{:?}", x); +} + +fn main() { +} |