1 error[E0593]: closure is expected to take a single 2-tuple as argument, but it takes 2 distinct arguments
2 --> $DIR/closure-arg-count-expected-type-issue-47244.rs:16:23
4 LL | let _n = m.iter().map(|_, b| {
5 | ^^^ ------ takes 2 distinct arguments
7 | expected closure that takes a single 2-tuple as argument
9 help: change the closure to accept a tuple instead of individual arguments
11 LL | let _n = m.iter().map(|(_, b)| {
14 error: aborting due to previous error
16 For more information about this error, try `rustc --explain E0593`.