error[E0119]: conflicting implementations of trait `go_trait::GoMut` for type `MyThingy`: --> $DIR/coherence-blanket-conflicts-with-specific-cross-crate.rs:18:1 | LL | impl GoMut for MyThingy { | ^^^^^^^^^^^^^^^^^^^^^^^ | = note: conflicting implementation in crate `go_trait`: - impl go_trait::GoMut for G where G: go_trait::Go; error: aborting due to previous error For more information about this error, try `rustc --explain E0119`.