Ted Phelps <phelps(a)dstc.edu.au> writes:
[problem with debugger]
After a brief pause, the error message `Wrong type argument:
number-char-or-marker-p, nil' will appear in the minibuffer.
I haven't seen any developer response to this article so I thought I'd
chime in that I also see the behavior described above and the patch
supplied fixes it for me.