Since this has not been reverted/changed for 3.6.4 or 3.7.0a3, another potential issue arises: C extensions that are compiled with Visual Studio 2017 are linked to a newer version of vcruntime140.dll (latest is 14.12.25810, VS2017 15.5) than the DLL shipped with the CPython 3.6.4/3.7.0a3 installer (14.0.24210, VS2015 Update 3). There is no standard way C extensions that are compiled with VS2017 can load the correct/newer vcruntime140.dll. That said, I have not noticed any problems yet while testing with Python 3.7.0a3. |