Debugging walkthrough: Diagnosing a __purecall failure

Prerequisite: Understanding what __purecall means.I was asked to help diagnose an issue in which a program managed to stumble into the __purecall function. XYZ!_purecall:00a14509 a100000000      mov     eax,dword ptr ds:[00000000h] ds:0023:00000000=????????The stack at the point of failure looked like this:XYZ!_purecallXYZ!CViewFrame::SetFrame+0x14d XYZ!CViewFrame::SetPresentation+0x355XYZ!