I have finally managed to generate an "out-of-memory" condition while playing
WoW with git HEAD at:

commit f5bd5568abcc234c1c2b6a4bb67b880706f3caed
Author: Mark Mueller <MarkKMueller@gmail.com>
Date:   Tue Jan 21 22:37:20 2014 -0800

    mesa: Fix Type A _INT formats to MESA_FORMAT naming standard

So the bottom line is that I cannot bisect this, because not only do I have no
reliable means of identifying a "GOOD" commit, but I also have no idea where
the first "GOOD" commit might be.