src/test/ui/fn/fn-closure-mutable-capture.stderr

   1 error[E0594]: cannot assign to `x`, as it is a captured variable in a `Fn` closure
   2   --> $DIR/fn-closure-mutable-capture.rs:5:17
   3    |
   4 LL | pub fn bar<F: Fn()>(_f: F) {}
   5    |                         - change this to accept `FnMut` instead of `Fn`
   6 ...
   7 LL |     bar(move || x = 1);
   8    |     ---         ^^^^^ cannot assign
   9    |     |
  10    |     expects `Fn` instead of `FnMut`
  11
  12 error: aborting due to previous error
  13
  14 For more information about this error, try `rustc --explain E0594`.