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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/unsafe/ranged_ints4_const.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/unsafe/ranged_ints4_const.rs')
-rw-r--r-- | src/test/ui/unsafe/ranged_ints4_const.rs | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/test/ui/unsafe/ranged_ints4_const.rs b/src/test/ui/unsafe/ranged_ints4_const.rs new file mode 100644 index 000000000..a43c8be71 --- /dev/null +++ b/src/test/ui/unsafe/ranged_ints4_const.rs @@ -0,0 +1,22 @@ +// revisions: mirunsafeck thirunsafeck +// [thirunsafeck]compile-flags: -Z thir-unsafeck + +#![feature(rustc_attrs)] + +#[rustc_layout_scalar_valid_range_start(1)] +#[repr(transparent)] +pub(crate) struct NonZero<T>(pub(crate) T); +fn main() {} + +const fn foo() -> NonZero<u32> { + let mut x = unsafe { NonZero(1) }; + x.0 = 0; + //~^ ERROR mutation of layout constrained field is unsafe + x +} + +const fn bar() -> NonZero<u32> { + let mut x = unsafe { NonZero(1) }; + unsafe { x.0 = 0 }; // this is UB + x +} |