+error[E0499]: cannot borrow `foo[_]` as mutable more than once at a time
+ --> $DIR/suggest-split-at-mut.rs:4:13
+ |
+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
+ |
+ = help: consider using `.split_at_mut(position)` or similar method to obtain two mutable non-overlapping sub-slices
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0499`.