tests/ui/fn/fn-closure-mutable-capture.rs

   1 pub fn bar<F: Fn()>(_f: F) {} //~ NOTE change this to accept `FnMut` instead of `Fn`
   2
   3 pub fn foo() {
   4     let mut x = 0;
   5     bar(move || x = 1);
   6     //~^ ERROR cannot assign to `x`, as it is a captured variable in a `Fn` closure
   7     //~| NOTE cannot assign
   8     //~| NOTE expects `Fn` instead of `FnMut`
   9     //~| NOTE in this closure
  10 }
  11
  12 fn main() {}