it's pretty interesting though - surely you would have flagged the equivalent C++ code to what is discussed in https://github.com/rust-lang/rust/issues/93740, if my understanding is correct - akin to std::unique_ptr<pthread_mutex_t>, as obviously wrong ? It's a pattern that was apparently commonplace in rust until now yet I would definitely not let my first year comp. sci. interns get away with something like this during code review.