Comment # 9 on bug 65438 from Tom Stellard

Created attachment 80630 [details] [review]
Possible Fix / Work Around

Can you try this patch?  It should fix the segfault, but it looks to me like
the real bug might be in the CFG Structurizer.  There are a number of PHI nodes
that take undef as an argument, and I'm not sure if that is correct.