update-manager crashed with SIGABRT in __GI___assert_fail()

[Maximilian I]

I wanted to install updates on my Ubuntu 12.04.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: update-manager 1:0.156.4
ProcVersionSignature: Ubuntu 3.2.0-14.23-generic 3.2.3
Uname: Linux 3.2.0-14-generic x86_64
ApportVersion: 1.91-0ubuntu1
Architecture: amd64
Date: Wed Feb 8 11:32:11 2012
ExecutablePath: /usr/bin/update-manager
GsettingsChanges:

InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120123)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/update-manager --dist-upgrade
Signal: 6
SourcePackage: update-manager
StacktraceTop:
 raise () from /lib/x86_64-linux-gnu/libc.so.6
 abort () from /lib/x86_64-linux-gnu/libc.so.6
 __assert_fail () from /lib/x86_64-linux-gnu/libc.so.6
 ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6
 _XReply () from /usr/lib/x86_64-linux-gnu/libX11.so.6
Title: update-manager crashed with SIGABRT in raise()
UpgradeStatus: Upgraded to precise on 2012-02-08 (0 days ago)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 __GI___assert_fail (assertion=0x7f8e9aa1fda5 "!xcb_xlib_unknown_req_in_deq", file=<optimized out>, line=178, function=<optimized out>) at assert.c:81
 dequeue_pending_request (dpy=<optimized out>, req=<optimized out>) at ../../src/xcb_io.c:176
 _XReply (dpy=0x164ca50, rep=0x7fff2b0f2530, extra=0, discard=1) at ../../src/xcb_io.c:638
 XInternAtom (dpy=0x164ca50, name=0x272cea0 "GDK_TIMESTAMP_PROP", onlyIfExists=<optimized out>) at ../../src/IntAtom.c:181
 gdk_x11_atom_to_xatom_for_display (atom=0x9a, display=0x165a000) at /build/buildd/gtk+3.0-3.3.14/./gdk/x11/gdkproperty-x11.c:246