error[E0507]: cannot move out of `foo` in pattern guard
  --> $DIR/issue-27282-move-ref-mut-into-guard.rs:9:19
   |
LL |             if { (|| { let bar = foo; bar.take() })(); false } => {},
   |                   ^^             ---
   |                   |              |
   |                   |              move occurs because `foo` has type `&mut std::option::Option<&i32>`, which does not implement the `Copy` trait
   |                   |              move occurs due to use in closure
   |                   move out of `foo` occurs here
   |
   = note: variables bound in patterns cannot be moved from until after the end of the pattern guard

error: aborting due to previous error

For more information about this error, try `rustc --explain E0507`.