error: unreachable pattern
  --> $DIR/issue-57472.rs:15:13
   |
LL |             Punned { foo: [_], .. } => println!("foo"),
   |             ----------------------- matches all the relevant values
LL |             Punned { bar: [_], .. } => println!("bar"),
   |             ^^^^^^^^^^^^^^^^^^^^^^^ no value can reach this
   |
note: the lint level is defined here
  --> $DIR/issue-57472.rs:2:9
   |
LL | #![deny(unreachable_patterns)]
   |         ^^^^^^^^^^^^^^^^^^^^

error: unreachable pattern
  --> $DIR/issue-57472.rs:32:17
   |
LL |                 Punned { foo: [_] } => println!("foo"),
   |                 ------------------- matches all the relevant values
LL |                 Punned { bar: [_] } => println!("bar"),
   |                 ^^^^^^^^^^^^^^^^^^^ no value can reach this

error: aborting due to 2 previous errors