error[E0277]: the trait bound `NotDebugOrDisplay: Marker` is not satisfied --> $DIR/overlap-marker-trait.rs:28:17 | LL | is_marker::(); | ^^^^^^^^^^^^^^^^^ the trait `Marker` is not implemented for `NotDebugOrDisplay` | note: required by a bound in `is_marker` --> $DIR/overlap-marker-trait.rs:16:17 | LL | fn is_marker() { } | ^^^^^^ required by this bound in `is_marker` error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0277`.