When I launch Emacs over an x2go connection, it crashes with the following
error as soon as the mouse is moved over the window, or as soon as the window
is maximized via the title bar.

X protocol error: BadRequest (invalid request code or no such operation) on
protocol request 131
When compiled with GTK, Emacs cannot recover from X disconnects.
This is a GTK bug: https://bugzilla.gnome.org/show_bug.cgi?id=85715
For details, see etc/PROBLEMS.
Fatal error 6: Aborted
Backtrace:
/usr/bin/emacs[0x50a6a9]
/usr/bin/emacs[0x4f124c]
/usr/bin/emacs[0x50a753]
/usr/bin/emacs[0x4c170e]
/usr/bin/emacs[0x4c5fde]
/usr/bin/emacs[0x4c606b]
/usr/lib64/libX11.so.6(_XError+0x11d)[0x7f5f8974482d]
/usr/lib64/libX11.so.6(+0x44757)[0x7f5f89741757]
/usr/lib64/libX11.so.6(+0x44815)[0x7f5f89741815]
/usr/lib64/libX11.so.6(_XReply+0x238)[0x7f5f89742728]
/usr/lib64/libX11.so.6(XQueryPointer+0x8e)[0x7f5f897388be]
/usr/lib64/libgdk-3.so.0(+0x5a2ea)[0x7f5f8af5b2ea]
/usr/lib64/libgdk-3.so.0(+0x78d45)[0x7f5f8af79d45]
/usr/lib64/libgdk-3.so.0(gdk_window_get_device_position_double+0x10b)[0x7f5f8af4d52b]
/usr/lib64/libgdk-3.so.0(gdk_window_get_device_position+0x2d)[0x7f5f8af4d62d]
/usr/lib64/libgtk-3.so.0(+0x348049)[0x7f5f8b541049]
/usr/lib64/libgtk-3.so.0(+0x3485bf)[0x7f5f8b5415bf]
/usr/lib64/libgdk-3.so.0(+0x2d5e8)[0x7f5f8af2e5e8]
/usr/lib64/libglib-2.0.so.0(+0x4dfa3)[0x7f5f89eb2fa3]
/usr/lib64/libglib-2.0.so.0(g_main_context_dispatch+0x15a)[0x7f5f89eb252a]
/usr/bin/emacs[0x5e1548]
/usr/bin/emacs[0x5a7568]
/usr/bin/emacs[0x4fc0d4]
/usr/bin/emacs[0x4fde30]
/usr/bin/emacs[0x4ffa06]
/usr/bin/emacs[0x563912]
/usr/bin/emacs[0x4f16dc]
/usr/bin/emacs[0x5638b3]
/usr/bin/emacs[0x4f1699]
/usr/bin/emacs[0x4f5e87]
/usr/bin/emacs[0x4f61db]
/usr/bin/emacs[0x41bede]
/lib64/libc.so.6(__libc_start_main+0xf1)[0x7f5f8322a291]
/usr/bin/emacs[0x41ca6a]
Aborted (core dumped)


I'm running emacs-25.1-251.24.x86_64 from the editors repository at
<http://download.opensuse.org/repositories/editors/openSUSE_Factory/> and
x2goserver-4.0.1.19-2.16.x86_64 from the X2Go repository at
<http://download.opensuse.org/repositories/X11:/RemoteDesktop:/x2go/openSUSE_Tumbleweed/>.


Upstream mailing list discussions:

bug-gnu-emacs:
https://lists.gnu.org/archive/html/bug-gnu-emacs/2016-08/msg00701.html

x2go-user: http://x2go-user.x2go.narkive.com/QtMBxsLp/emacs-crashes-on-start


The issue has also been reported for Fedora 24:
<https://bugzilla.redhat.com/show_bug.cgi?id=1349412>