error[E0277]: the trait bound `<G as GetToInt>::R: ToInt` is not satisfied
  --> $DIR/associated-types-bound-failure.rs:19:19
   |
LL |     fn to_int(&self) -> isize;
   |     -------------------------- required by `ToInt::to_int`
...
LL |     ToInt::to_int(&g.get())
   |                   ^^^^^^^^ the trait `ToInt` is not implemented for `<G as GetToInt>::R`
   |
help: consider further restricting the associated type
   |
LL |     where G : GetToInt, <G as GetToInt>::R: ToInt
   |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to previous error

For more information about this error, try `rustc --explain E0277`.