1 // Some optimizations remove ZST accesses, thus masking this UB.
2 // compile-flags: -Zmir-opt-level=0
5 // This pointer *could* be NULL so we cannot load from it, not even at ZST.
6 // Not using the () type here, as writes of that type do not even have MIR generated.
7 // Also not assigning directly as that's array initialization, not assignment.
8 let zst_val = [1u8; 0];
9 let ptr = (&0u8 as *const u8).wrapping_sub(0x800) as *mut [u8; 0];
10 unsafe { *ptr = zst_val; } //~ ERROR out-of-bounds