RE: quitting ediff with pop-up-frames non-nil gives wrong-type arg error

[Drew Adams]

    > > Get these two buffers (for example) in two separate frames:
    > > *scratch*, *Messages*.
    >
    > This was the crucial missing detail: if I do this, I see the error as
    > well.  If I invoke Ediff from the single (initial) frame, the error
    > doesn't happen.

Sorry, I figured that would be obvious from setting pop-up-frames non-nil.
Yes, I know now, it's not obvious.

    > Michael, can you reproduce this on GNU/Linux?

    no, it works without a hitch.
    Let me understand the precise sequence:

    1. Make 2 frames
    2. Put *scratch* in one and *Messages* in another
    3. do ediff-buffers
    4. Type q in the little window

    The above sequence doesn't cause any problems in the Linux
    version of Emacs.

Yes, but set pop-up-frames to t. And then type `y' after `q', in response to
the prompt.