Message 402928 - Python tracker

I think this is a bug of MSVC2019, not a really regression of CPython. So changing the code of CPython is just a workaround, maybe the right direction is to prompt MSVC to fix the bug, otherwise there will be more trouble when 3.11 is released a year later.

Seeing MSVC's reply, it seems they didn't realize that it was a bug, but suggested to adjust the training samples and use `__forceinline`. They don't know `__forceinline` hangs the build process since 28d28e0.