error[E0502]: cannot borrow `*collection` as mutable because `collection` is also borrowed as immutable | |
--> $DIR/issue-42106.rs:13:5 | |
| | |
LL | let _a = &collection; | |
| ---------- immutable borrow occurs here | |
LL | collection.swap(1, 2); //~ ERROR also borrowed as immutable | |
| ^^^^^^^^^^ mutable borrow occurs here | |
LL | _a.use_ref(); | |
LL | } | |
| - immutable borrow ends here | |
error: aborting due to previous error | |
For more information about this error, try `rustc --explain E0502`. |