tests/ui/traits/inductive-overflow/lifetime.rs

   1 // Test that we don't hit the recursion limit for short cycles involving lifetimes.
   2
   3 // Shouldn't hit this, we should realize that we're in a cycle sooner.
   4 #![recursion_limit="20"]
   5
   6 trait NotAuto {}
   7 trait Y {
   8     type P;
   9 }
  10
  11 impl<'a> Y for C<'a> {
  12     type P = Box<X<C<'a>>>;
  13 }
  14
  15 struct C<'a>(&'a ());
  16 struct X<T: Y>(T::P);
  17
  18 impl<T: NotAuto> NotAuto for Box<T> {}
  19 impl<T: Y> NotAuto for X<T> where T::P: NotAuto {} //~ NOTE: required
  20 //~^ NOTE unsatisfied trait bound introduced here
  21 impl<'a> NotAuto for C<'a> {}
  22
  23 fn is_send<S: NotAuto>() {}
  24 //~^ NOTE: required
  25 //~| NOTE: required
  26
  27 fn main() {
  28     // Should only be a few notes.
  29     is_send::<X<C<'static>>>();
  30     //~^ ERROR overflow evaluating
  31 }