error: transmuting a known null pointer into a reference. --> $DIR/transmuting_null.rs:10:23 | LL | let _: &u64 = std::mem::transmute(0 as *const u64); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = note: `-D clippy::transmuting-null` implied by `-D warnings` error: transmuting a known null pointer into a reference. --> $DIR/transmuting_null.rs:11:23 | LL | let _: &u64 = std::mem::transmute(std::ptr::null::()); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: transmuting a known null pointer into a reference. --> $DIR/transmuting_null.rs:21:23 | LL | let _: &u64 = std::mem::transmute(ZPTR); | ^^^^^^^^^^^^^^^^^^^^^^^^^ error: aborting due to 3 previous errors