error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in generic --> $DIR/issue-47715.rs:9:37 | LL | struct Container> { | ^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in generic --> $DIR/issue-47715.rs:14:30 | LL | enum Enum> { | ^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in generic --> $DIR/issue-47715.rs:19:32 | LL | union Union + Copy> { | ^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in generic --> $DIR/issue-47715.rs:24:30 | LL | type Type> = T; | ^^^^^^^^ error: aborting due to 4 previous errors For more information about this error, try `rustc --explain E0562`.