Re: input-pending-p after make-frame-visible

[martin rudalics]

>> What is "the original frame"?  There is apparently a single (visible)
>> frame in the recipe.
>
> Yes, but at least on macOS, that frame loses focus after the first C-x
> C-x. It's possible that the child frame has focus instead, even though
> it is invisible.

Awkward.  Can you try calling 'frame-focus-state' on both frames to find
out whether Emacs itself has an idea of which frame has focus?

martin