3 #![feature(core_intrinsics)]
4 #![feature(const_heap)]
5 #![feature(const_raw_ptr_deref)]
6 #![feature(const_mut_refs)]
9 const BAR: &i32 = unsafe { &*(intrinsics::const_allocate(4, 4) as *mut i32) };
10 //~^ error: it is undefined behavior to use this value