bug#38497: 27.0.50; Frame is not rendered when frame-resize-pixelwise it 't

[martin rudalics]

> I mean literally. Emacs frame does not redraw properly. I tried make
> several window splits after M-x menu-bar-mode. See the attached
> screenshot.
>
> I don't even need to change fonts or load emacs theme to trigger this.

OK.  So we have a simpler scenario now.  From the screenshot I cannot
understand where redrawing hangs.  Is input still functional in such a
mangled frame?  Does evaluating (redisplay t) change anything?

Two additional things you could try: What happens when you use 0
instead of 1 in the XtNwidthInc and XtNheightInc assignments like

                 XtNwidthInc, (XtArgVal) (frame_resize_pixelwise ? 0 : cw),
                 XtNheightInc, (XtArgVal) (frame_resize_pixelwise ? 0 : ch),

And what happens when you skip these two assignments entirely when
frame_resize_pixelwise is non-nil?

martin