error[E0223]: ambiguous associated type
  --> $DIR/issue-23073.rs:16:17
   |
LL |     type FooT = <<Self as Bar>::Foo>::T; //~ ERROR ambiguous associated type
   |                 ^^^^^^^^^^^^^^^^^^^^^^^ ambiguous associated type
   |
   = note: specify the type using the syntax `<<Self as Bar>::Foo as Trait>::T`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0223`.