src/test/ui/nll/unused-mut-issue-50343.stderr

   1 error: variable does not need to be mutable
   2   --> $DIR/unused-mut-issue-50343.rs:7:33
   3    |
   4 LL |     vec![(42, 22)].iter().map(|(mut x, _y)| ()).count();
   5    |                                 ----^
   6    |                                 |
   7    |                                 help: remove this `mut`
   8    |
   9 note: the lint level is defined here
  10   --> $DIR/unused-mut-issue-50343.rs:3:9
  11    |
  12 LL | #![deny(unused_mut)]
  13    |         ^^^^^^^^^^
  14
  15 error: aborting due to previous error
  16