error[E0277]: the trait bound `[u8]: AutoTrait` is not satisfied in `str` --> $DIR/str-contains-slice-conceptually.rs:11:22 | LL | needs_auto_trait::(); | ^^^ within `str`, the trait `AutoTrait` is not implemented for `[u8]` | = note: `str` is considered to contain a `[u8]` slice for auto trait purposes note: required by a bound in `needs_auto_trait` --> $DIR/str-contains-slice-conceptually.rs:8:24 | LL | fn needs_auto_trait() {} | ^^^^^^^^^ required by this bound in `needs_auto_trait` error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0277`.