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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/consts/const-eval/ub-uninhabit.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 '')
-rw-r--r-- | tests/ui/consts/const-eval/ub-uninhabit.rs | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/tests/ui/consts/const-eval/ub-uninhabit.rs b/tests/ui/consts/const-eval/ub-uninhabit.rs new file mode 100644 index 000000000..4c4ef216d --- /dev/null +++ b/tests/ui/consts/const-eval/ub-uninhabit.rs @@ -0,0 +1,25 @@ +// Strip out raw byte dumps to make comparison platform-independent: +// normalize-stderr-test "(the raw bytes of the constant) \(size: [0-9]*, align: [0-9]*\)" -> "$1 (size: $$SIZE, align: $$ALIGN)" +// normalize-stderr-test "([0-9a-f][0-9a-f] |╾─*a(lloc)?[0-9]+(\+[a-z0-9]+)?─*╼ )+ *│.*" -> "HEX_DUMP" + +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() {} |