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// Test that none of the precondition checks panic on zero-sized reads or writes through null.
//@ run-pass
//@ compile-flags: -Zmir-opt-level=0 -Copt-level=0 -Cdebug-assertions=yes
use std::ptr;
fn main() {
unsafe {
#[expect(invalid_null_arguments)] // false-positive, copy of 0
ptr::copy_nonoverlapping::<u8>(ptr::null(), ptr::null_mut(), 0);
ptr::copy_nonoverlapping::<()>(ptr::null(), ptr::null_mut(), 123);
#[expect(invalid_null_arguments)] // false-positive, copy of 0
ptr::copy::<u8>(ptr::null(), ptr::null_mut(), 0);
ptr::copy::<()>(ptr::null(), ptr::null_mut(), 123);
ptr::swap::<()>(ptr::null_mut(), ptr::null_mut());
ptr::replace::<()>(ptr::null_mut(), ());
ptr::read::<()>(ptr::null());
ptr::write::<()>(ptr::null_mut(), ());
ptr::read_volatile::<()>(ptr::null());
ptr::write_volatile::<()>(ptr::null_mut(), ());
}
}
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