| More than one function parameter have the same name. | |
| Erroneous code example: | |
| ```compile_fail,E0415 | |
| fn foo(f: i32, f: i32) {} // error: identifier `f` is bound more than | |
| // once in this parameter list | |
| ``` | |
| Please verify you didn't misspell parameters' name. Example: | |
| ``` | |
| fn foo(f: i32, g: i32) {} // ok! | |
| ``` |