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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/consts/const-eval/ub-uninhabit.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/consts/const-eval/ub-uninhabit.rs')
-rw-r--r-- | src/test/ui/consts/const-eval/ub-uninhabit.rs | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/test/ui/consts/const-eval/ub-uninhabit.rs b/src/test/ui/consts/const-eval/ub-uninhabit.rs new file mode 100644 index 000000000..33fbd14c4 --- /dev/null +++ b/src/test/ui/consts/const-eval/ub-uninhabit.rs @@ -0,0 +1,24 @@ +// stderr-per-bitwidth +#![allow(const_err)] // make sure we cannot allow away the errors tested here + +use std::mem; + +#[derive(Copy, Clone)] +enum Bar {} + +#[repr(C)] +union MaybeUninit<T: Copy> { + uninit: (), + init: T, +} + +const BAD_BAD_BAD: Bar = unsafe { MaybeUninit { uninit: () }.init }; +//~^ ERROR it is undefined behavior to use this value + +const BAD_BAD_REF: &Bar = unsafe { mem::transmute(1usize) }; +//~^ ERROR it is undefined behavior to use this value + +const BAD_BAD_ARRAY: [Bar; 1] = unsafe { MaybeUninit { uninit: () }.init }; +//~^ ERROR it is undefined behavior to use this value + +fn main() {} |