https://bugs.winehq.org/show_bug.cgi?id=46236 --- Comment #16 from Chatty <mail(a)chatty.de> --- I could finally spot the root cause with the help of Alex: This little piece of code compiled with /MT (instead of default /MD) causes x64 code to crash on a Mac (x86 or Linux is not affected): struct s { static unsigned WINAPI func(void* Param) { std::wcout << (const wchar_t*)Param; return 0; } }; _beginthreadex(nullptr, 0, &s::func, (void*)L"Test", 0, 0); Sleep(1000); More info on the compiler parameter: https://docs.microsoft.com/cpp/build/reference/md-mt-ld-use-run-time-library... -- Do not reply to this email, post in Bugzilla using the above URL to reply. You are receiving this mail because: You are watching all bug changes.