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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/variance/variance-associated-types2.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/variance/variance-associated-types2.rs')
-rw-r--r-- | src/test/ui/variance/variance-associated-types2.rs | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/test/ui/variance/variance-associated-types2.rs b/src/test/ui/variance/variance-associated-types2.rs new file mode 100644 index 000000000..e487eefea --- /dev/null +++ b/src/test/ui/variance/variance-associated-types2.rs @@ -0,0 +1,17 @@ +// Test that dyn Foo<Bar = T> is invariant with respect to T. +// Failure to enforce invariance here can be weaponized, see #71550 for details. + +trait Foo { + type Bar; +} + +fn make() -> Box<dyn Foo<Bar = &'static u32>> { + panic!() +} + +fn take<'a>(_: &'a u32) { + let _: Box<dyn Foo<Bar = &'a u32>> = make(); + //~^ ERROR lifetime may not live long enough +} + +fn main() {} |