error[E0637]: `'_` cannot be used here --> $DIR/where-clauses.rs:3:10 | LL | impl<'b: '_> Foo<'b> for i32 {} | ^^ `'_` is a reserved lifetime name error[E0637]: `'_` cannot be used here --> $DIR/where-clauses.rs:5:9 | LL | impl Foo<'static> for Vec {} | ^^ `'_` is a reserved lifetime name error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0637`.