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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/match/match-ref-mut-let-invariance.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/match/match-ref-mut-let-invariance.rs')
-rw-r--r-- | tests/ui/match/match-ref-mut-let-invariance.rs | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/tests/ui/match/match-ref-mut-let-invariance.rs b/tests/ui/match/match-ref-mut-let-invariance.rs new file mode 100644 index 000000000..a33be09ac --- /dev/null +++ b/tests/ui/match/match-ref-mut-let-invariance.rs @@ -0,0 +1,16 @@ +// Check that when making a ref mut binding with type `&mut T`, the +// type `T` must match precisely the type `U` of the value being +// matched, and in particular cannot be some supertype of `U`. Issue +// #23116. This test focuses on a `let`. + +#![allow(dead_code)] +struct S<'b>(&'b i32); +impl<'b> S<'b> { + fn bar<'a>(&'a mut self) -> &'a mut &'a i32 { + let ref mut x = self.0; + x + //~^ ERROR lifetime may not live long enough + } +} + +fn main() {} |