error[E0594]: cannot assign to `counter`, as it is a captured variable in a `Fn` closure | |
--> $DIR/unboxed-closures-mutated-upvar-from-fn-closure.rs:11:9 | |
| | |
LL | counter += 1; | |
| ^^^^^^^^^^^^ cannot assign | |
| | |
help: consider changing this to accept closures that implement `FnMut` | |
--> $DIR/unboxed-closures-mutated-upvar-from-fn-closure.rs:10:10 | |
| | |
LL | call(|| { | |
| __________^ | |
LL | | counter += 1; | |
LL | | | |
LL | | }); | |
| |_____^ | |
error: aborting due to previous error | |