gnome-shell crashed with SIGSEGV in notify_swap_buffers()

[Th. Sievers]

while login

ProblemType: Crash
DistroRelease: Ubuntu 14.10
Package: gnome-shell 3.14.1-0ubuntu1~utopic2 [origin: LP-PPA-gnome3-team-gnome3-staging]
ProcVersionSignature: Ubuntu 3.16.0-23.31-generic 3.16.4
Uname: Linux 3.16.0-23-generic i686
ApportVersion: 2.14.7-0ubuntu8
Architecture: i386
CurrentDesktop: GNOME
Date: Fri Oct 24 02:49:21 2014
DisplayManager: lightdm
ExecutablePath: /usr/bin/gnome-shell
InstallationDate: Installed on 2014-10-02 (21 days ago)
InstallationMedia: Xubuntu 14.04.1 LTS "Trusty Tahr" - Release i386 (20140723)
ProcCmdline: /usr/bin/gnome-shell
ProcEnviron:
 LANGUAGE=de_DE
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0xb5d50aa4: mov %eax,0x30(%ebp)
 PC (0xb5d50aa4) ok
 source "%eax" ok
 destination "0x30(%ebp)" (0x00000030) not located in a known VMA region (needed writable region)!
SegvReason: writing NULL VMA
Signal: 11
SourcePackage: gnome-shell
StacktraceTop:
 ?? () from /usr/lib/i386-linux-gnu/libcogl.so.20
 ?? () from /usr/lib/i386-linux-gnu/libcogl.so.20
 cogl_xlib_renderer_handle_event () from /usr/lib/i386-linux-gnu/libcogl.so.20
 ?? () from /usr/lib/i386-linux-gnu/libclutter-1.0.so.0
 ?? () from /usr/lib/i386-linux-gnu/libclutter-1.0.so.0
Title: gnome-shell crashed with SIGSEGV in cogl_xlib_renderer_handle_event()
UpgradeStatus: Upgraded to utopic on 2014-10-18 (5 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Ubuntu GNOME (ug-bot)]

StacktraceTop:
 notify_swap_buffers (swap_event=<optimized out>, context=<optimized out>) at ./winsys/cogl-winsys-glx.c:439
 glx_event_filter_cb (xevent=0xbf9f903c, data=0x0) at ./winsys/cogl-winsys-glx.c:561
 _cogl_renderer_handle_native_event (renderer=0x82f7100, event=0xbf9f903c) at ./cogl-renderer.c:732
 cogl_xlib_renderer_handle_event (renderer=0x82f7100, event=0xbf9f903c) at ./cogl-xlib-renderer.c:589
 cogl_xlib_filter (xevent=0xbf9f903c, event=0x94fb648, data=0x82e4018) at ./x11/clutter-backend-x11.c:132