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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/impl-trait/multiple-lifetimes/error-handling.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/impl-trait/multiple-lifetimes/error-handling.rs')
-rw-r--r-- | src/test/ui/impl-trait/multiple-lifetimes/error-handling.rs | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/test/ui/impl-trait/multiple-lifetimes/error-handling.rs b/src/test/ui/impl-trait/multiple-lifetimes/error-handling.rs new file mode 100644 index 000000000..367e7f4e6 --- /dev/null +++ b/src/test/ui/impl-trait/multiple-lifetimes/error-handling.rs @@ -0,0 +1,26 @@ +#![feature(type_alias_impl_trait)] + +#[derive(Clone)] +struct CopyIfEq<T, U>(T, U); + +impl<T: Copy> Copy for CopyIfEq<T, T> {} + +type E<'a, 'b> = impl Sized; + +fn foo<'a, 'b, 'c>(x: &'static i32, mut y: &'a i32) -> E<'b, 'c> { + let v = CopyIfEq::<*mut _, *mut _>(&mut { x }, &mut y); + + // This assignment requires that `x` and `y` have the same type due to the + // `Copy` impl. The reason why we are using a copy to create a constraint + // is that only borrow checking (not regionck in type checking) enforces + // this bound. + let u = v; + let _: *mut &'a i32 = u.1; + unsafe { + let _: &'b i32 = *u.0; + //~^ ERROR lifetime may not live long enough + } + u.0 +} + +fn main() {} |