error[E0119]: conflicting implementations of trait `MyTrait` for type `Foo` --> $DIR/E0119.rs:13:1 | LL | impl MyTrait for T { | --------------------- first implementation here ... LL | impl MyTrait for Foo { | ^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `Foo` error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0119`.