| error[E0284]: type annotations needed: cannot resolve `<_ as std::ops::Try>::Ok == _` | |
| --> $DIR/question-mark-type-infer.rs:12:5 | |
| | | |
| LL | l.iter().map(f).collect()? | |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^ | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0284`. |