1 error[E0284]: type annotations needed
2 --> $DIR/question-mark-type-infer.rs:12:21
4 LL | l.iter().map(f).collect()?
8 | help: consider specifying the type argument in the method call: `collect::<_>`
10 = note: cannot resolve `<_ as std::ops::Try>::Ok == _`
12 error: aborting due to previous error
14 For more information about this error, try `rustc --explain E0284`.