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error: non-binding let on a synchronization lock
--> $DIR/let_underscore_lock.rs:6:9
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LL | let _ = data.lock().unwrap();
| ^ ^^^^^^^^^^^^^^^^^^^^ this binding will immediately drop the value assigned to it
| |
| this lock is not assigned to a binding and is immediately dropped
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= note: `#[deny(let_underscore_lock)]` on by default
help: consider binding to an unused variable to avoid immediately dropping the value
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LL | let _unused = data.lock().unwrap();
| ~~~~~~~
help: consider immediately dropping the value
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LL | drop(data.lock().unwrap());
| ~~~~~ +
error: aborting due to previous error
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