Mfc updating document class variables
And the implications on the rest of the program architecture were significant, so they now have several weeks' work to fix the problem, but they now understand why it couldn't possibly have worked, except by a great miracle.
I'll talk more about the failure mode details later.
I have a little awk script I run on , and it locates these "hotspots".
Usually in less than half an hour I can locate more problems than I have been asked to solve just by studying the code near the hotspots.