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error[E0510]: cannot mutably borrow `x` in match guard
--> $DIR/issue-27282-mutate-before-diverging-arm-3.rs:20:14
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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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