diff options
Diffstat (limited to 'src/test/ui/consts/miri_unleashed/const_refers_to_static.rs')
-rw-r--r-- | src/test/ui/consts/miri_unleashed/const_refers_to_static.rs | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/src/test/ui/consts/miri_unleashed/const_refers_to_static.rs b/src/test/ui/consts/miri_unleashed/const_refers_to_static.rs new file mode 100644 index 000000000..c9dc1de51 --- /dev/null +++ b/src/test/ui/consts/miri_unleashed/const_refers_to_static.rs @@ -0,0 +1,31 @@ +// build-fail +// compile-flags: -Zunleash-the-miri-inside-of-you +#![allow(const_err)] + +use std::sync::atomic::AtomicUsize; +use std::sync::atomic::Ordering; + +// These fail during CTFE (as they read a static), so they only cause an error +// when *using* the const. + +const MUTATE_INTERIOR_MUT: usize = { + static FOO: AtomicUsize = AtomicUsize::new(0); + FOO.fetch_add(1, Ordering::Relaxed) +}; + +const READ_INTERIOR_MUT: usize = { + static FOO: AtomicUsize = AtomicUsize::new(0); + unsafe { *(&FOO as *const _ as *const usize) } +}; + +static mut MUTABLE: u32 = 0; +const READ_MUT: u32 = unsafe { MUTABLE }; + +fn main() { + MUTATE_INTERIOR_MUT; + //~^ ERROR: erroneous constant used + READ_INTERIOR_MUT; + //~^ ERROR: erroneous constant used + READ_MUT; + //~^ ERROR: erroneous constant used +} |