File: issue-13727.rs

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rustc 1.88.0%2Bdfsg1-1
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#![allow(overflowing_literals)]
#![deny(unreachable_patterns)]

fn test(val: u8) {
  match val {
    256 => print!("0b1110\n"),
    512 => print!("0b1111\n"),
    //~^ ERROR: unreachable pattern
    _   => print!("fail\n"),
  }
}

fn main() {
  test(1);
}