wingpanel crashed with SIGSEGV in gtk_widget_get_parent()

[dehein]

The Xorg server crashed and logged me out.
Hopefully someone can report it.

I am using intel sandybridge with the internal graphics unit.
The nvidia card was deactivated by bios.

ProblemType: Crash
DistroRelease: elementary OS 0.3
Package: wingpanel 0.3~r173+pkg19~ubuntu0.3.1 [origin: LP-PPA-elementary-os-daily]
ProcVersionSignature: Ubuntu 3.13.0-36.63-generic 3.13.11.6
Uname: Linux 3.13.0-36-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.4
Architecture: amd64
CrashDB: wingpanel
CurrentDesktop: Pantheon
Date: Mon Sep 15 10:31:56 2014
ExecutablePath: /usr/bin/wingpanel
GSettings:
 org.pantheon.desktop.wingpanel show-launcher true
 org.pantheon.desktop.wingpanel default-launcher 'slingshot-launcher'
 org.pantheon.desktop.wingpanel auto-adjust-alpha true
 org.pantheon.desktop.wingpanel background-alpha 0.80000000000000004
 org.pantheon.desktop.wingpanel blacklist ['libappmenu.so']
GsettingsChanges:

InstallationDate: Installed on 2014-08-11 (34 days ago)
InstallationMedia: elementary OS 0.3 "Freya" - Daily amd64 (20140810)
ProcCmdline: wingpanel
ProcEnviron:
 LANGUAGE=de_DE
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f4317c5face <gtk_widget_get_parent+14>: mov (%rbx),%rdx
 PC (0x7f4317c5face) ok
 source "(%rbx)" (0x2000000030) not located in a known VMA region (needed readable region)!
 destination "%rdx" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: wingpanel
StacktraceTop:
 gtk_widget_get_parent () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
 ?? ()
 ?? ()
 ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
Title: wingpanel crashed with SIGSEGV in gtk_widget_get_parent()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip fax lpadmin plugdev sambashare sudo vboxusers