redefinition of function `main.f`
vlib/v/checker/tests/fn_duplicate.vv:1:1: conflicting declaration: fn f()
    1 | fn f() {
      | ~~~~~~
    2 |     
    3 | }
vlib/v/checker/tests/fn_duplicate.vv:5:1: conflicting declaration: fn f(i int)
    3 | }
    4 | 
    5 | fn f(i int) {
      | ~~~~~~~~~~~
    6 |     
    7 | }
