Bug: emacs-X11 25.1.1 within "XWin -multiwindow" control-frame only shows "\"

[Ken Brown]

On 6/29/2017 10:44 AM, Tobias Zawada wrote:
> Dear cygwin heroes,
> I am experiencing an error with the combination of XWin.exe -multiwindow and
> emacs-X11.
> 
> Receipt for reconstruction:
> XWin-version:
> 
>> Welcome to the XWin X Server
>> Vendor: The Cygwin/X Project
>> Release: 1.18.4.0
>> OS: CYGWIN_NT-10.0 DREWOR020 2.8.0(0.309/5/3) 2017-04-01 20:47 x86_64
>> OS: Windows 10 [Windows NT 10.0 build 15063] (Win64)
>> Package: version 1.18.4-1 built 2016-07-22
> 
> emacs-version:
> 
>> GNU Emacs 25.1.1 (x86_64-unknown-cygwin, GTK+ Version 3.18.9)
> 
> Start emacs with:
> 
>> emacs -Q
> 
> Compare two arbitrary buffers with
> 
>> M-x ediff-buffers
> 
> The minimized ediff-control-frame only shows:
> 
>> \
> 
> I am expecting in the ediff-control-frame something like:
> 
>> Type ? for help
>> _/1
> 
> If I started emacs in a mintty (2.7.8) I get there the following warning:
> 
>> (emacs-X11:1832): Gtk-WARNING **: gtk_window_parse_geometry() called on a
>> window with no visible children;
>> the window should be set up before gtk_window_parse_geometry() is called.
> 
> The error does not occur with
> 
>> XWin -rootless &
>> twm.exe &

This might be due to the same bug that was reported in

   https://cygwin.com/ml/cygwin/2017-03/msg00280.html

and was fixed by rebuilding emacs.  Please update to the current emacs 
release (25.2-1) and see if the problem is still there.

BTW, I'm puzzled by your cygcheck output, which doesn't even show that 
emacs is installed.

Ken

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