Rust needs to add some runtime checks when calling destructors in scenarios where some object may or may not be moved. In C++ for instance, for smart pointers,

Rust needs to add some runtime checks when calling destructors in scenarios where some object may or may not be moved. In C++ for instance, for smart pointers, the destructor will have a "if p!= NULL". Then if the smart pointer was moved, it makes the pointer null and the destructor checks at runtime for it.