error[E0119]: conflicting implementations of trait `From<MyError<_>>` for type `MyError<_>` --> $DIR/so-37347311.rs:11:1 | LL | impl<S: Storage> From<S::Error> for MyError<S> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = note: conflicting implementation in crate `core`: - impl<T> From<T> for T; error: aborting due to previous error For more information about this error, try `rustc --explain E0119`.