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error[E0499]: cannot borrow `x` as mutable more than once at a time
--> $DIR/borrowck-autoref-3261.rs:15:9
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LL | (&mut x).with(
| -------- ---- first borrow later used by call
| |
| first mutable borrow occurs here
LL | |opt| {
| ^^^^^ second mutable borrow occurs here
...
LL | x = X(Either::Left((0, 0)));
| - second borrow occurs due to use of `x` in closure
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0499`.
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