error[E0594]: cannot assign to captured outer variable in an `Fn` closure
  --> $DIR/fn-closure-mutable-capture.rs:15:17
   |
LL |     bar(move || x = 1);
   |                 ^^^^^
   |
   = note: `Fn` closures cannot capture their enclosing environment for modifications
help: consider changing this closure to take self by mutable reference
  --> $DIR/fn-closure-mutable-capture.rs:15:9
   |
LL |     bar(move || x = 1);
   |         ^^^^^^^^^^^^^

error: aborting due to previous error

For more information about this error, try `rustc --explain E0594`.