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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
commit | 218caa410aa38c29984be31a5229b9fa717560ee (patch) | |
tree | c54bd55eeb6e4c508940a30e94c0032fbd45d677 /tests/ui/issues/issue-30438-c.rs | |
parent | Releasing progress-linux version 1.67.1+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-218caa410aa38c29984be31a5229b9fa717560ee.tar.xz rustc-218caa410aa38c29984be31a5229b9fa717560ee.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/issues/issue-30438-c.rs')
-rw-r--r-- | tests/ui/issues/issue-30438-c.rs | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/tests/ui/issues/issue-30438-c.rs b/tests/ui/issues/issue-30438-c.rs new file mode 100644 index 000000000..4cf634245 --- /dev/null +++ b/tests/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) +} |