error[E0582]: binding for associated type `Output` references lifetime `'a`, which does not appear in the trait input types
  --> $DIR/constrain_inputs_unsound.rs:23:58
   |
LL |     type MalformedTy = dyn for<'a> Callable<Gal<&'a ()>, Output = &'a str>;
   |                                                          ^^^^^^^^^^^^^^^^

error: aborting due to previous error

For more information about this error, try `rustc --explain E0582`.
