1error[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
3   |
4LL |     let _n = m.iter().map(|_, b| {
5   |                       ^^^ ------ takes 2 distinct arguments
6   |                       |
7   |                       expected closure that takes a single 2-tuple as argument
8   |
9help: change the closure to accept a tuple instead of individual arguments
10   |
11LL |     let _n = m.iter().map(|(_, b)| {
12   |                           ~~~~~~~~
13
14error: aborting due to previous error
15
16For more information about this error, try `rustc --explain E0593`.
17