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error[E0499]: cannot borrow `foo[_]` as mutable more than once at a time
--> $DIR/suggest-split-at-mut.rs:4:13
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LL | let a = &mut foo[2];
| ----------- first mutable borrow occurs here
LL | let b = &mut foo[3];
| ^^^^^^^^^^^ second mutable borrow occurs here
LL | *a = 5;
| ------ first borrow later used here
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= help: consider using `.split_at_mut(position)` or similar method to obtain two mutable non-overlapping sub-slices
= help: consider using `.swap(index_1, index_2)` to swap elements at the specified indices
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0499`.
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