error[E0432]: unresolved import `self::*`
  --> $DIR/issue-31212.rs:5:13
   |
LL |     pub use self::*;
   |             ^^^^^^^ cannot glob-import a module into itself

error[E0425]: cannot find function `f` in module `foo`
  --> $DIR/issue-31212.rs:9:10
   |
LL |     foo::f();
   |          ^ not found in `foo`

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0425, E0432.
For more information about an error, try `rustc --explain E0425`.