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dd826b4626
Add `let_underscore_drop` This line generalizes `let_underscore_lock` (#5101) to warn about any initializer expression that implements `Drop`. So, for example, the following would generate a warning: ```rust struct Droppable; impl Drop for Droppable { fn drop(&mut self) {} } let _ = Droppable; ``` I tried to preserve the original `let_underscore_lock` functionality in the sense that the warning generated for ```rust let _ = mutex.lock(); ``` should be unchanged. *Please keep the line below* changelog: Add lint [`let_underscore_drop`] |
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