| error[E0510]: cannot mutably borrow `x` in match guard | |
| --> $DIR/issue-27282-mutate-before-diverging-arm-2.rs:26:18 | |
| | | |
| LL | match x { | |
| | - value is immutable in match guard | |
| ... | |
| LL | (|| { *x = None; drop(force_fn_once); })(); | |
| | ^^ -- borrow occurs due to use of `x` in closure | |
| | | | |
| | cannot mutably borrow | |
| error: aborting due to 1 previous error | |
| For more information about this error, try `rustc --explain E0510`. |