error[E0119]: conflicting implementations of trait `MyMarker` --> $DIR/feature-gate-overlapping_marker_traits.rs:6:1 | LL | impl MyMarker for T {} | ------------------------------- first implementation here LL | impl MyMarker for T {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0119`.