diff options
Diffstat (limited to 'src/test/ui/consts/const-eval/promoted_const_fn_fail.rs')
-rw-r--r-- | src/test/ui/consts/const-eval/promoted_const_fn_fail.rs | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/test/ui/consts/const-eval/promoted_const_fn_fail.rs b/src/test/ui/consts/const-eval/promoted_const_fn_fail.rs new file mode 100644 index 000000000..1fc7af637 --- /dev/null +++ b/src/test/ui/consts/const-eval/promoted_const_fn_fail.rs @@ -0,0 +1,22 @@ +#![allow(const_err)] + +#[repr(C)] +union Bar { + a: &'static u8, + b: usize, +} + +const fn bar() -> u8 { + unsafe { + // this will error as long as this test + // is run on a system whose pointers need more + // than 8 bits + Bar { a: &42 }.b as u8 + } +} + +fn main() { + let x: &'static u8 = &(bar() + 1); //~ ERROR temporary value dropped while borrowed + let y = *x; + unreachable!(); +} |