Okay, just tested taking out the C++ handler and it goes straight to an error report. Not ideal, especially since the error is logged against "python.exe" and "ucrtbase.dll" (which is going to make my life harder when reviewing the submitted crash reports), but since it can only be caused by user code, it's probably better than spamming on every handled exception.

E06D7363 (msc) and E0434352 (CCR) at least should be ignored. I think there's a third, but don't remember what it is right now.