error[E0659]: `Foo` is ambiguous
  --> $DIR/rfc-1560-warning-cycle.rs:9:17
   |
LL |         fn f(_: Foo) {}
   |                 ^^^ ambiguous name
   |
   = note: ambiguous because of multiple glob imports of a name in the same module
note: `Foo` could refer to the struct imported here
  --> $DIR/rfc-1560-warning-cycle.rs:7:13
   |
LL |         use *;
   |             ^
   = help: consider adding an explicit import of `Foo` to disambiguate
note: `Foo` could also refer to the struct imported here
  --> $DIR/rfc-1560-warning-cycle.rs:8:13
   |
LL |         use bar::*;
   |             ^^^^^^
   = help: consider adding an explicit import of `Foo` to disambiguate

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0659`.