1 // Some optimizations remove ZST accesses, thus masking this UB.
2 //@compile-flags: -Zmir-opt-level=0
4 #[allow(deref_nullptr)]
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 unsafe { std::ptr::null_mut::<[u8; 0]>().write(zst_val) };
10 //~^ERROR: memory access failed: null pointer is a dangling pointer