| error[E0631]: type mismatch in closure arguments |
| --> $DIR/unboxed-closures-vtable-mismatch.rs:16:24 |
| | |
| LL | let f = to_fn_mut(|x: usize, y: isize| -> isize { (x as isize) + y }); |
| | ----------------------------- found signature defined here |
| LL | |
| LL | let z = call_it(3, f); |
| | ------- ^ expected due to this |
| | | |
| | required by a bound introduced by this call |
| | |
| = note: expected closure signature `fn(isize, _) -> _` |
| found closure signature `fn(usize, _) -> _` |
| note: required by a bound in `call_it` |
| --> $DIR/unboxed-closures-vtable-mismatch.rs:7:15 |
| | |
| LL | fn call_it<F: FnMut(isize, isize) -> isize>(y: isize, mut f: F) -> isize { |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `call_it` |
| help: consider wrapping the function in a closure |
| | |
| LL | let z = call_it(3, |arg0: isize, arg1: isize| f(/* usize */, arg1)); |
| | ++++++++++++++++++++++++++ +++++++++++++++++++ |
| |
| error: aborting due to 1 previous error |
| |
| For more information about this error, try `rustc --explain E0631`. |