bug#6942: 24.0.50; Uses 100% CPU and eats memory with trivial C++ code

[Chong Yidong]

Óscar Fuentes <ofv@wanadoo.es> writes:

> emacs -Q [ENTER]
> C-x C-f foo.cpp [ENTER]
> template <typename T,
>
> As soon as the comma is typed, Emacs hangs and starts eating several MB
> of RAM per second. Pressing C-g takes effect after a few seconds.

Thanks, I can reproduce the bug.  It seems to a regression due to the
2010-07-31 template changes in CC mode.  Alan or Nathaniel, could either
of you please take a look?  Thanks.