[Bug libstdc++/71684] Memory leak with std::mutex and std::lock_guard on freebsd

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71684

--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Yes, that firces the use of pthread_mutex_create and pthread_mutex_destroy,
which gives the OS a chance to free memory on destroy.

I don't recall what happened with FreeBSD, I think they moved away from
allocating in pthread_mutex_lock but I might be wrong.