| 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::<u64>()); | 
 |    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | 
 |  | 
 | 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 | 
 |  |