1 error[E0282]: type annotations needed for `Option<T>`
2 --> $DIR/unboxed-closures-failed-recursive-fn-2.rs:8:9
4 LL | let mut closure0 = None;
8 | --- type must be known at this point
10 help: consider giving `closure0` an explicit type, where the placeholders `_` are specified
12 LL | let mut closure0: Option<T> = None;
15 error: aborting due to previous error
17 For more information about this error, try `rustc --explain E0282`.