src/test/ui/closure_context/issue-26046-fn-mut.stderr

   1 error[E0525]: expected a closure that implements the `Fn` trait, but this closure only implements `FnMut`
   2   --> $DIR/issue-26046-fn-mut.rs:14:19
   3    |
   4 14 |       let closure = || {
   5    |  ___________________^
   6 15 | |         num += 1;
   7 16 | |     };
   8    | |_____^
   9    |
  10 note: closure is `FnMut` because it mutates the variable `num` here
  11   --> $DIR/issue-26046-fn-mut.rs:15:9
  12    |
  13 15 |         num += 1;
  14    |         ^^^
  15
  16 error: aborting due to previous error(s)
  17