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error[E0505]: cannot move out of `s` because it is borrowed
--> $DIR/btreemap_dropck.rs:15:10
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LL | let s = String::from("Hello World!");
| - binding `s` declared here
LL | let _map = BTreeMap::from_iter([((), PrintOnDrop(&s))]);
| -- borrow of `s` occurs here
LL | drop(s);
| ^ move out of `s` occurs here
LL | }
| - borrow might be used here, when `_map` is dropped and runs the `Drop` code for type `BTreeMap`
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help: consider cloning the value if the performance cost is acceptable
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LL | let _map = BTreeMap::from_iter([((), PrintOnDrop(&s.clone()))]);
| ++++++++
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0505`.
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