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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/issues/issue-30438-c.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 '')
-rw-r--r-- | src/test/ui/issues/issue-30438-c.rs | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/test/ui/issues/issue-30438-c.rs b/src/test/ui/issues/issue-30438-c.rs new file mode 100644 index 000000000..4cf634245 --- /dev/null +++ b/src/test/ui/issues/issue-30438-c.rs @@ -0,0 +1,21 @@ +// Simplified regression test for #30438, inspired by arielb1. + +trait Trait { type Out; } + +struct Test<'a> { s: &'a str } + +fn silly<'y, 'z>(_s: &'y Test<'z>) -> &'y <Test<'z> as Trait>::Out where 'z: 'static { + //~^ WARN unnecessary lifetime parameter `'z` + let x = Test { s: "this cannot last" }; + &x + //~^ ERROR: cannot return reference to local variable `x` +} + +impl<'b> Trait for Test<'b> { type Out = Test<'b>; } + +fn main() { + let orig = Test { s: "Hello World" }; + let r = silly(&orig); + println!("{}", orig.s); // OK since `orig` is valid + println!("{}", r.s); // Segfault (method does not return a sane value) +} |