error[E0106]: missing lifetime specifier
  --> $DIR/missing-lifetime-in-alias.rs:23:24
   |
LL | type B<'a> = <A<'a> as Trait>::Foo;
   |                        ^^^^^ expected named lifetime parameter
   |
help: consider using the `'a` lifetime
   |
LL | type B<'a> = <A<'a> as Trait<'a>>::Foo;
   |                             ++++

error[E0106]: missing lifetime specifier
  --> $DIR/missing-lifetime-in-alias.rs:27:28
   |
LL | type C<'a, 'b> = <A<'a> as Trait>::Bar;
   |                            ^^^^^ expected named lifetime parameter
   |
note: these named lifetimes are available to use
  --> $DIR/missing-lifetime-in-alias.rs:27:8
   |
LL | type C<'a, 'b> = <A<'a> as Trait>::Bar;
   |        ^^  ^^
help: consider using one of the available lifetimes here
   |
LL | type C<'a, 'b> = <A<'a> as Trait<'lifetime>>::Bar;
   |                                 +++++++++++

error[E0477]: the type `Impl<'a>` does not fulfill the required lifetime
  --> $DIR/missing-lifetime-in-alias.rs:16:20
   |
LL |     type Bar<'b>
   |     ------------ definition of `Bar` from trait
...
LL |     type Bar<'b> = &'b ();
   |                    ^^^^^^
   |
note: type must outlive the lifetime `'b` as defined here
  --> $DIR/missing-lifetime-in-alias.rs:16:14
   |
LL |     type Bar<'b> = &'b ();
   |              ^^
help: copy the `where` clause predicates from the trait
   |
LL |     type Bar<'b> = &'b () where Self: 'b;
   |                           ++++++++++++++

error[E0107]: missing generics for associated type `Trait::Bar`
  --> $DIR/missing-lifetime-in-alias.rs:27:36
   |
LL | type C<'a, 'b> = <A<'a> as Trait>::Bar;
   |                                    ^^^ expected 1 lifetime argument
   |
note: associated type defined here, with 1 lifetime parameter: `'b`
  --> $DIR/missing-lifetime-in-alias.rs:4:10
   |
LL |     type Bar<'b>
   |          ^^^ --
help: add missing lifetime argument
   |
LL | type C<'a, 'b> = <A<'a> as Trait>::Bar<'a>;
   |                                       ++++

error: aborting due to 4 previous errors

Some errors have detailed explanations: E0106, E0107, E0477.
For more information about an error, try `rustc --explain E0106`.