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

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

Receipt for reconstruction:

Welcome to the XWin X Server
Vendor: The Cygwin/X Project
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


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

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


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.


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