| error[E0631]: type mismatch in closure arguments |
| --> $DIR/unboxed-closures-vtable-mismatch.rs:15:13 |
| | |
| LL | fn call_it<F:FnMut(isize,isize)->isize>(y: isize, mut f: F) -> isize { |
| | -------------------------------------------------------------------- required by `call_it` |
| ... |
| LL | let f = to_fn_mut(|x: usize, y: isize| -> isize { (x as isize) + y }); |
| | ----------------------------- found signature of `fn(usize, isize) -> _` |
| LL | |
| LL | let z = call_it(3, f); |
| | ^^^^^^^ expected signature of `fn(isize, isize) -> _` |
| |
| error: aborting due to previous error |
| |
