rust/src/test/ui/issue-21600.stderr

error[E0387]: cannot borrow data mutably in a captured outer variable in an `Fn` closure
  --> $DIR/issue-21600.rs:24:17
   |
24 |         call_it(|| x.gen_mut()); //~ ERROR cannot borrow data mutably in a captured outer
   |                 ^^
   |
help: consider changing this to accept closures that implement `FnMut`
  --> $DIR/issue-21600.rs:22:13
   |
22 |       call_it(|| {
   |  _____________^
23 | |         call_it(|| x.gen());
24 | |         call_it(|| x.gen_mut()); //~ ERROR cannot borrow data mutably in a captured outer
25 | |         //~^ ERROR cannot borrow data mutably in a captured outer
26 | |     });
   | |_____^

error[E0387]: cannot borrow data mutably in a captured outer variable in an `Fn` closure
  --> $DIR/issue-21600.rs:24:20
   |
24 |         call_it(|| x.gen_mut()); //~ ERROR cannot borrow data mutably in a captured outer
   |                    ^
   |
help: consider changing this closure to take self by mutable reference
  --> $DIR/issue-21600.rs:24:17
   |
24 |         call_it(|| x.gen_mut()); //~ ERROR cannot borrow data mutably in a captured outer
   |                 ^^^^^^^^^^^^^^

error: aborting due to 2 previous errors

If you want more information on this error, try using "rustc --explain E0387"