error[E0034]: multiple applicable items in scope
  --> $DIR/ambiguity.rs:15:24
   |
LL |     let _: Wrapper<_>::Foo = ();
   |                        ^^^ multiple `Foo` found
   |
note: candidate #1 is defined in an impl for the type `Wrapper<i32>`
  --> $DIR/ambiguity.rs:7:5
   |
LL |     type Foo = i32;
   |     ^^^^^^^^
note: candidate #2 is defined in an impl for the type `Wrapper<()>`
  --> $DIR/ambiguity.rs:11:5
   |
LL |     type Foo = ();
   |     ^^^^^^^^

error: aborting due to previous error

For more information about this error, try `rustc --explain E0034`.