1 error[E0308]: mismatched types
2 --> $DIR/output-type-mismatch.rs:15:31
4 LL | fn main() { let i: isize; i = f(); }
5 | ^^^ expected isize, found ()
7 = note: expected type `isize`
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0308`.