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error: temporary with significant `Drop` can be early dropped
--> $DIR/significant_drop_tightening.rs:12:9
|
LL | pub fn complex_return_triggers_the_lint() -> i32 {
| __________________________________________________-
LL | | fn foo() -> i32 {
LL | | 1
LL | | }
LL | | let mutex = Mutex::new(1);
LL | | let lock = mutex.lock().unwrap();
| | ^^^^
... |
LL | | foo()
LL | | }
| |_- temporary `lock` is currently being dropped at the end of its contained scope
|
= note: this might lead to unnecessary resource contention
= note: `-D clippy::significant-drop-tightening` implied by `-D warnings`
help: drop the temporary after the end of its last usage
|
LL ~ let _ = *lock;
LL + drop(lock);
|
error: temporary with significant `Drop` can be early dropped
--> $DIR/significant_drop_tightening.rs:44:13
|
LL | / {
LL | | let mutex = Mutex::new(1i32);
LL | | let lock = mutex.lock().unwrap();
| | ^^^^
LL | | let rslt0 = lock.abs();
LL | | let rslt1 = lock.is_positive();
LL | | do_heavy_computation_that_takes_time((rslt0, rslt1));
LL | | }
| |_____- temporary `lock` is currently being dropped at the end of its contained scope
|
= note: this might lead to unnecessary resource contention
help: drop the temporary after the end of its last usage
|
LL ~ let rslt1 = lock.is_positive();
LL + drop(lock);
|
error: temporary with significant `Drop` can be early dropped
--> $DIR/significant_drop_tightening.rs:65:13
|
LL | / {
LL | | let mutex = Mutex::new(1i32);
LL | | let lock = mutex.lock().unwrap();
| | ^^^^
LL | | let rslt0 = lock.abs();
LL | | do_heavy_computation_that_takes_time(rslt0);
LL | | }
| |_____- temporary `lock` is currently being dropped at the end of its contained scope
|
= note: this might lead to unnecessary resource contention
help: merge the temporary construction with its single usage
|
LL ~
LL + let rslt0 = mutex.lock().unwrap().abs();
|
help: remove separated single usage
|
LL - let rslt0 = lock.abs();
LL +
|
error: temporary with significant `Drop` can be early dropped
--> $DIR/significant_drop_tightening.rs:71:17
|
LL | / {
LL | | let mutex = Mutex::new(vec![1i32]);
LL | | let mut lock = mutex.lock().unwrap();
| | ^^^^
LL | | lock.clear();
LL | | do_heavy_computation_that_takes_time(());
LL | | }
| |_____- temporary `lock` is currently being dropped at the end of its contained scope
|
= note: this might lead to unnecessary resource contention
help: merge the temporary construction with its single usage
|
LL ~
LL + mutex.lock().unwrap().clear();
|
help: remove separated single usage
|
LL - lock.clear();
LL +
|
error: aborting due to 4 previous errors
|
