rust/tests/compile-fail/maybe_null_pointer_write_zst.rs
2018-09-17 10:02:31 +02:00

9 lines
422 B
Rust

fn main() {
// This pointer *could* be NULL so we cannot load from it, not even at ZST.
// Not using the () type here, as writes of that type do not even have MIR generated.
// Also not assigning directly as that's array initialization, not assignment.
let zst_val = [1u8; 0];
let ptr = (&0u8 as *const u8).wrapping_sub(0x800) as *mut [u8; 0];
unsafe { *ptr = zst_val; } //~ ERROR outside bounds
}