diff options
Diffstat (limited to 'tests/ui/consts/const-eval/ub-enum-overwrite.rs')
-rw-r--r-- | tests/ui/consts/const-eval/ub-enum-overwrite.rs | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/tests/ui/consts/const-eval/ub-enum-overwrite.rs b/tests/ui/consts/const-eval/ub-enum-overwrite.rs new file mode 100644 index 000000000..086a1001d --- /dev/null +++ b/tests/ui/consts/const-eval/ub-enum-overwrite.rs @@ -0,0 +1,18 @@ +#![feature(const_mut_refs)] + +enum E { + A(u8), + B, +} + +const _: u8 = { + 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 } + //~^ ERROR evaluation of constant value failed + //~| uninitialized +}; + +fn main() {} |