error: comparing with null is better expressed by the `.is_null()` method
  --> $DIR/cmp_null.rs:9:8
   |
LL |     if p == ptr::null() {
   |        ^^^^^^^^^^^^^^^^
   |
   = note: `-D clippy::cmp-null` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::cmp_null)]`

error: comparing with null is better expressed by the `.is_null()` method
  --> $DIR/cmp_null.rs:16:8
   |
LL |     if m == ptr::null_mut() {
   |        ^^^^^^^^^^^^^^^^^^^^

error: aborting due to 2 previous errors