error[E0277]: the trait bound `NotDebugOrDisplay: Marker` is not satisfied --> $DIR/overlap-marker-trait.rs:30:5 | LL | is_marker::(); //~ ERROR | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Marker` is not implemented for `NotDebugOrDisplay` | note: required by `is_marker` --> $DIR/overlap-marker-trait.rs:18:1 | LL | fn is_marker() { } | ^^^^^^^^^^^^^^^^^^^^^^^^^ error: aborting due to previous error For more information about this error, try `rustc --explain E0277`.