On Tue, 18 May 2010, Chong Yidong wrote:
> Looks like a stack overflow in the `string' function.  I've checked in a
> fix, thanks for the bug report.

It seems the bug is still in the current Emacs HEAD
(http://repo.or.cz/w/emacs.git/commit/08d1bfbda3ef4a7038556f6c56bec1a37b4721f0).
I can reproduce it with the lisp code sent by Carl, but the backtrace is
different. My backtrace is attached.

Thanks
Michal