error: unreachable pattern
  --> $DIR/issue-13727.rs:7:5
   |
LL |     256 => print!("0b1110\n"),
   |     --- matches all the relevant values
LL |     512 => print!("0b1111\n"),
   |     ^^^ no value can reach this
   |
note: the lint level is defined here
  --> $DIR/issue-13727.rs:2:9
   |
LL | #![deny(unreachable_patterns)]
   |         ^^^^^^^^^^^^^^^^^^^^

error: aborting due to 1 previous error