tests/ui/issues/issue-21600.rs

   1 fn call_it<F>(f: F) where F: Fn() { f(); }
   2
   3 struct A;
   4
   5 impl A {
   6     fn gen(&self) {}
   7     fn gen_mut(&mut self) {}
   8 }
   9
  10 fn main() {
  11     let mut x = A;
  12     call_it(|| {
  13         call_it(|| x.gen());
  14         call_it(|| x.gen_mut());
  15         //~^ ERROR cannot borrow `x` as mutable, as it is a captured variable in a `Fn` closure
  16         //~| ERROR cannot borrow `x` as mutable, as it is a captured variable in a `Fn` closure
  17     });
  18 }