armanriazirustlifetimedrop

Unfortunately, it’s not straightforward to disable the automatic drop functionality. Disabling drop isn’t usually necessary; the whole point of the Drop trait is that it’s taken care of automatically. Occasionally, however, you might want to clean up a value early. 
Rust doesn’t let you call the Drop trait’s drop method manually; instead you have to call the std::mem::drop function
ArmanRiazi