3rdGeneration and Visual Studio 2022 version 17.11.4 c++ CRASH : msvcp140.dll mutex

Programming Questions
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1

Hello,
I’ve recently upgraded my visual studiot to its the lastest version (6 month I’ve not did it).
Surprise : my DLL built with this version crashes (x64 release, windows) in Open method whereas it did not crash with an oldervistual studio 22 17.x version.

msvcp140.dll:
_Mutex_base::lock() [
if (_Mtx_lock(_Mymtx()) != _Thrd_result::_Success) {
→ “Exception thrown at 0x00007FFE0B242F58 (msvcp140.dll) in TestInterfaceAcqGen.exe: 0xC0000005: Access violation reading location 0x0000000000000000.”

I asked the question to Microsoft dev community: msvcp140.dll crash mutex with code built with latest visual studio - Developer Community

There is a workaround if I define “_DISABLE_CONSTEXPR_MUTEX_CONSTRUCTOR”. It seems microsoft changed constexpression things on mutex. This means the same code that worked fine will I you compile it on the latest visual studio upgrade.

I am not using the latest CVB on the machine I tested it, the wrappers have probably changed a bit.

Did you have noticed this (big) mutex problem with lastest visual studio?
I yes how did you solve it?

Thanks in advance,
Mikael.

2

This is a forum for common vision blox. Your problem arises from a VC runtime change (as the dev community already said in the last sentence: “if you’re seeing this crash, you’re running it against an older VC runtime (msvcp140.dll), which is not supported.”), try to look up your configuration of the installed loads inside the visual studio installer and the targeted runtime.