error[E0599]: no method named `hello` found for type parameter `impl Foo` in the current scope
  --> $DIR/impl-trait-with-missing-trait-bounds-in-arg.rs:15:9
   |
LL | fn test(foo: impl Foo) {
   |              -------- method `hello` not found for this type parameter
LL |     foo.hello();
   |         ^^^^^ method not found in `impl Foo`
   |
   = help: items from traits can only be used if the type parameter is bounded by the trait
help: the following trait defines an item `hello`, perhaps you need to restrict type parameter `impl Foo` with it:
   |
LL | fn test(foo: impl Foo + Bar) {
   |                       +++++

error: aborting due to previous error

For more information about this error, try `rustc --explain E0599`.