error[E0592]: duplicate definitions with name `test`
  --> $DIR/auto-dedup-in-impl.rs:14:5
   |
LL |     fn test(&self) { println!("one"); }
   |     ^^^^^^^^^^^^^^ duplicate definitions for `test`
...
LL |     fn test(&self) { println!("two"); }
   |     -------------- other definition for `test`

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0592`.