error[E0428]: the name `f` is defined multiple times
 --> $DIR/test-compile-fail1.rs:8:1
  |
6 | pub fn f() {}
  | ---------- previous definition of the value `f` here
7 |
8 | pub fn f() {}
  | ^^^^^^^^^^ `f` redefined here
  |
  = note: `f` must be defined only once in the value namespace of this module

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0428`.