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error[E0631]: type mismatch in closure arguments
--> $DIR/unboxed-closures-vtable-mismatch.rs:16:24
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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
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LL | fn call_it<F: FnMut(isize, isize) -> isize>(y: isize, mut f: F) -> isize {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `call_it`
error: aborting due to previous error
For more information about this error, try `rustc --explain E0631`.
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