error[E0599]: no method named `foo` found for struct `Qux` in the current scope
  --> $DIR/method-ambiguity-no-rcvr.rs:12:9
   |
LL | struct Qux;
   | ---------- method `foo` not found for this struct
...
LL |     Qux.foo();
   |         ^^^ this is an associated function, not a method
   |
   = note: found the following associated functions; to be used as methods, functions must have a `self` parameter
note: candidate #1 is defined in the trait `Foo`
  --> $DIR/method-ambiguity-no-rcvr.rs:4:5
   |
LL |     fn foo();
   |     ^^^^^^^^^
note: candidate #2 is defined in the trait `FooBar`
  --> $DIR/method-ambiguity-no-rcvr.rs:8:5
   |
LL |     fn foo() {}
   |     ^^^^^^^^
help: disambiguate the associated function for candidate #1
   |
LL |     <Qux as Foo>::foo();
   |     ~~~~~~~~~~~~~~~~~~~
help: disambiguate the associated function for candidate #2
   |
LL |     <Qux as FooBar>::foo();
   |     ~~~~~~~~~~~~~~~~~~~~~~

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0599`.