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