warning: unused variable: `x`
  --> $DIR/unboxed-closures-move-mutable.rs:17:17
   |
LL |         move || x += 1;
   |                 ^
   |
   = help: did you mean to capture by reference instead?
   = note: `#[warn(unused_variables)]` on by default

warning: unused variable: `x`
  --> $DIR/unboxed-closures-move-mutable.rs:21:17
   |
LL |         move || x += 1;
   |                 ^
   |
   = help: did you mean to capture by reference instead?

warning: 2 warnings emitted