error[E0277]: the trait bound `f32: Foo` is not satisfied --> $DIR/chalk_initial_program.rs:15:13 | LL | fn gimme() { } | --- required by this bound in `gimme` ... LL | gimme::(); | ^^^ the trait `Foo` is not implemented for `f32` error: aborting due to previous error For more information about this error, try `rustc --explain E0277`.