1 // Some optimizations remove ZST accesses, thus masking this UB.
2 // compile-flags: -Zmir-opt-level=0
3 // error-pattern: memory access failed: null pointer is not a valid pointer
5 #[allow(deref_nullptr)]
7 // Not using the () type here, as writes of that type do not even have MIR generated.
8 // Also not assigning directly as that's array initialization, not assignment.
9 let zst_val = [1u8; 0];
10 unsafe { std::ptr::null_mut::<[u8; 0]>().write(zst_val) };