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