Some windows errors

[Skullface9512]

First - thank you for this effort. I'm studying on a program that using subprocess，but occurs some problems： 1、“initializer list” cannot convert to “subprocess::environment” 2、Microsoft C++ abnormal： subprocess::OSError and i work on windows10, visual studio 2017, is there any solutions for these problems，thanks a lot.

[xoviat]

I can confirm the issue with the environment. It caused the ci test to fail.