#![crate_type="lib"] #![deny(unreachable_patterns)] mod test_struct { // Test the exact copy of the minimal example // posted in the issue. pub struct Punned { foo: [u8; 1], bar: [u8; 1], } pub fn test(punned: Punned) { match punned { Punned { foo: [_], .. } => println!("foo"), Punned { bar: [_], .. } => println!("bar"), //~^ ERROR unreachable pattern [unreachable_patterns] } } } mod test_union { // Test the same thing using a union. pub union Punned { foo: [u8; 1], bar: [u8; 1], } pub fn test(punned: Punned) { match punned { Punned { foo: [_] } => println!("foo"), Punned { bar: [_] } => println!("bar"), //~^ ERROR unreachable pattern [unreachable_patterns] } } }