RE: 23.0.60; x-create-frame: wrong-type-argument number-or-markerp nil

[Drew Adams]

> Hmm.. that's the backtrace?
> If so, can you (while the above backtrace is still active) break Emacs
> in a debugger and look at the C stack trace, so as to figure out which
> piece of Elisp code is being evaluated here?

No. I won't mess with GDB; sorry. Also, I have no C source files.

I included the backtrace just before the error. x-create-frame apparently tests
for :visible and :enable (the same test twice), which return t. `d' in the
debugger then gives the error msg.