| error[E0275]: overflow assigning `_` to `Option<_>` | |
| --> $DIR/mutual-recursion-issue-75860.rs:9:33 | |
| | | |
| LL | let left = |o_a: Option<_>| o_a.unwrap(); | |
| | ^^^ | |
| error: aborting due to 1 previous error | |
| For more information about this error, try `rustc --explain E0275`. |