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error[E0510]: cannot mutably borrow `x` in match guard
--> $DIR/issue-27282-mutate-before-diverging-arm-1.rs:21:14
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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`.
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