error: missing import `sender_receiver_imports_4`
  --> test/ui/sender_receiver_imports.aldrin:8:23
   |
 8 |     f4 @ 4 = receiver<sender_receiver_imports_4::S>;
   |                       ^^^^^^^^^^^^^^^^^^^^^^^^^ schema `sender_receiver_imports_4` used here
   |
   = help: did you mean `sender_receiver_imports_2`?
