error: unreachable pattern
  --> $DIR/issue-13727.rs:17:5
   |
LL |     512 => print!("0b1111/n"),
   |     ^^^
   |
note: lint level defined here
  --> $DIR/issue-13727.rs:12:9
   |
LL | #![deny(unreachable_patterns)]
   |         ^^^^^^^^^^^^^^^^^^^^

error: aborting due to previous error