[edk2-buildtools] Python hangs if you source level debug C tool?

[Andrew F. <af...@ap...>]

I placed an _asm { int 3 }; in GenFw to debug a new feature I was adding and I noticed if I run the build normally I can source level debug, but If I try and exit the debugging session from Visual Studio the build locks up and the only thing I can do is kill the entire dos box. 

I think in this case the tool hits another breakpoint and crashes. But given the tool exits I would not expect the build command to deadlock. 

I'm not sure if this is related, but I've noticed strange long timeouts on OS X python on errors and seen hangs in cygwin that seem to happen in more normal cases. 

Andrew Fish