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error[E0499]: cannot borrow `v` as mutable more than once at a time
--> $DIR/one_line.rs:3:12
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LL | v.push(v.pop().unwrap());
| - ---- ^ second mutable borrow occurs here
| | |
| | first borrow later used by call
| first mutable borrow occurs here
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help: try adding a local storing this argument...
--> $DIR/one_line.rs:3:12
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LL | v.push(v.pop().unwrap());
| ^^^^^^^
help: ...and then using that local as the argument to this call
--> $DIR/one_line.rs:3:5
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LL | v.push(v.pop().unwrap());
| ^^^^^^^^^^^^^^^^^^^^^^^^
error: aborting due to previous error
For more information about this error, try `rustc --explain E0499`.
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