error[E0207]: the type parameter `T` is not constrained by the impl trait, self type, or predicates
  --> $DIR/issue-26262.rs:7:6
   |
LL | impl<T: Tr> S<T::Assoc> {
   |      ^ unconstrained type parameter
   |
help: use the type parameter `T` in the `S` type and use it in the type definition
   |
LL ~ struct S<T, T>(T);
LL |
LL | trait Tr { type Assoc; fn test(); }
LL |
LL ~ impl<T: Tr> S<T::Assoc, T> {
   |

error[E0207]: the lifetime parameter `'a` is not constrained by the impl trait, self type, or predicates
  --> $DIR/issue-26262.rs:17:6
   |
LL | impl<'a,T: Trait2<'a>> Trait1<<T as Trait2<'a>>::Foo> for T {
   |      ^^ unconstrained lifetime parameter

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0207`.
