https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107857
Bug ID: 107857 Summary: recursive_mutex misses destructor if non-function call initialization is used Product: gcc Version: 11.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libstdc++ Assignee: unassigned at gcc dot gnu.org Reporter: pg.ensiie at gmail dot com Target Milestone: --- Hello, Using GCC 11.2.0 with mingw-w64 9.0.0. I notice that there is a memory leak when using a std::recursive_mutex, as described in this issue : https://sourceforge.net/p/mingw-w64/bugs/851/. I reproduce this bug. After some research, I discover that same problem has occured for std::mutex, that was solved by this fix : https://sourceforge.net/p/mingw-w64/bugs/851/ The solution is to use function initialized and destructor for recursive_mutex as it is done for mutex when using pthread on windows. Defining _GTHREAD_USE_RECURSIVE_MUTEX_INIT_FUNC in os_defines.h fixes the bug. Even if I do not use it, I wonder if _GTHREAD_USE_COND_INIT_FUNC should also be set for condition variables.