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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-enum-overwrite.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-enum-overwrite.rs')
-rw-r--r-- | src/test/ui/consts/const-eval/ub-enum-overwrite.rs | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/test/ui/consts/const-eval/ub-enum-overwrite.rs b/src/test/ui/consts/const-eval/ub-enum-overwrite.rs new file mode 100644 index 000000000..c56778492 --- /dev/null +++ b/src/test/ui/consts/const-eval/ub-enum-overwrite.rs @@ -0,0 +1,17 @@ +#![feature(const_mut_refs)] + +enum E { + A(u8), + B, +} + +const _: u8 = { + //~^ ERROR is undefined behavior + let mut e = E::A(1); + let p = if let E::A(x) = &mut e { x as *mut u8 } else { unreachable!() }; + // Make sure overwriting `e` uninitializes other bytes + e = E::B; + unsafe { *p } +}; + +fn main() {} |