warning: unused variable: `x`
  --> $DIR/unboxed-closures-move-mutable.rs:16:17
   |
LL |         move || x += 1;
   |                 ^
   |
   = note: `#[warn(unused_variables)]` on by default
   = help: did you mean to capture by reference instead?

warning: unused variable: `x`
  --> $DIR/unboxed-closures-move-mutable.rs:20:17
   |
LL |         move || x += 1;
   |                 ^
   |
   = help: did you mean to capture by reference instead?

warning: 2 warnings emitted