error: missing import `sender_receiver_imports_3`
  --> test/ui/sender_receiver_imports.aldrin:7:21
   |
 7 |     f3 @ 3 = sender<sender_receiver_imports_3::S>;
   |                     ^^^^^^^^^^^^^^^^^^^^^^^^^ schema `sender_receiver_imports_3` used here
   |
   = help: did you mean `sender_receiver_imports_2`?
