diff options
Diffstat (limited to 'src/test/ui/unsafe/ranged_ints3_match.rs')
-rw-r--r-- | src/test/ui/unsafe/ranged_ints3_match.rs | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/test/ui/unsafe/ranged_ints3_match.rs b/src/test/ui/unsafe/ranged_ints3_match.rs new file mode 100644 index 000000000..d9fcf0bd6 --- /dev/null +++ b/src/test/ui/unsafe/ranged_ints3_match.rs @@ -0,0 +1,22 @@ +// revisions: mirunsafeck thirunsafeck +// [thirunsafeck]compile-flags: -Z thir-unsafeck + +#![feature(rustc_attrs)] + +use std::cell::Cell; + +#[rustc_layout_scalar_valid_range_start(1)] +#[repr(transparent)] +pub(crate) struct NonZero<T>(pub(crate) T); +fn main() { + let mut x = unsafe { NonZero(Cell::new(1)) }; + match x { + NonZero(ref x) => { x } + //~^ ERROR borrow of layout constrained field with interior mutability + }; + + let mut y = unsafe { NonZero(42) }; + match y { NonZero(ref y) => { y } }; // OK, type of `y` is freeze + match y { NonZero(ref mut y) => { y } }; + //~^ ERROR mutation of layout constrained field +} |