When uninitializing a thread and/or shutting down my application I sometimes get an access violation at "crtexe.c method __tmainCRTStartup()... if(has_cctor == 0) _cexit();". The call stack only shows dlls, where tbbmalloc.dll is closes to the top. I guess this occurs when the tbb allocator deallocates the memory pool for that specific thread. Question is what could cause this, and how can I go about debugging it?