bug#5482: frame-invisible-p reports nil for iconified frames on w32

[Andrew Hyatt]

Lennart Borgman <lennart.borgman@gmail.com> writes:

> This problem happens for example under these circumstances:
>
> Create a frame
>
>   (setq my-frame (make-frame))
>
> Iconify it. Then make it first invisible and then visible again:
>
>   (make-frame-invisible my-frame)
>   (make-frame-visible my-frame)
>
> The result of checking if it is visible is now nil (should be `iconified'):
>
>   (frame-visible-p my-frame)
>
> This is with a fresh checkout from yesterday.
>
>
> BTW the implementation of frame-visible-p seems a bit strange to me on
> w32. It is easy to check visibility using GetWindowPlacement, but is
> this used?

Sorry for the late reply here.  In Emacs 25, the behavior is different,
at least for me in Mac OS X.  Now, when I do (make-frame-visible
my-frame), the frame uniconifies and becomes a normal window again.

Can you (or anyone else) still reproduce this on Windows?