error[E0277]: the trait bound `(Option, f32): Foo` is not satisfied --> $DIR/generic_impls.rs:12:13 | LL | gimme::<(Option, f32)>(); | ^^^^^^^^^^^^^^^^ the trait `Foo` is not implemented for `(Option, f32)` | = help: the trait `Foo` is implemented for `(T, u32)` note: required by a bound in `gimme` --> $DIR/generic_impls.rs:7:13 | LL | fn gimme() { } | ^^^ required by this bound in `gimme` error[E0277]: the trait bound `(i32, f32): Foo` is not satisfied --> $DIR/generic_impls.rs:17:13 | LL | gimme::<(i32, f32)>(); | ^^^^^^^^^^ the trait `Foo` is not implemented for `(i32, f32)` | = help: the trait `Foo` is implemented for `(T, u32)` note: required by a bound in `gimme` --> $DIR/generic_impls.rs:7:13 | LL | fn gimme() { } | ^^^ required by this bound in `gimme` error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0277`.