error[E0599]: the method `get` exists for struct `Victim<'_, Self>`, but its trait bounds were not satisfied --> $DIR/impl-derived-implicit-sized-bound.rs:31:19 | LL | struct Victim<'a, T: Perpetrator + ?Sized> | ------------------------------------------ | | | method `get` not found for this struct | doesn't satisfy `Victim<'_, Self>: VictimTrait` ... LL | self.getter().get(); | ^^^ method cannot be called on `Victim<'_, Self>` due to unsatisfied trait bounds | note: trait bound `Self: Sized` was not satisfied --> $DIR/impl-derived-implicit-sized-bound.rs:15:10 | LL | impl<'a, T: Perpetrator /*+ ?Sized*/> VictimTrait for Victim<'a, T> { | ^ ----------- ------------- | | | unsatisfied trait bound introduced here help: consider relaxing the type parameter's implicit `Sized` bound | LL | impl<'a, T: ?Sized + Perpetrator /*+ ?Sized*/> VictimTrait for Victim<'a, T> { | ++++++++ help: consider restricting the type parameter to satisfy the trait bound | LL | Self: Sized, Self: Sized | +++++++++++++ error: aborting due to previous error For more information about this error, try `rustc --explain E0599`.