compiz crashed with SIGSEGV in main_arena()

[aberner]

In display-settings I switched off second display on HDMI Port which produced this crash

ProblemType: Crash
DistroRelease: Ubuntu 13.10
Package: unity 7.1.0+13.10.20130920-0ubuntu1
ProcVersionSignature: Ubuntu 3.11.0-8.15-generic 3.11.1
Uname: Linux 3.11.0-8-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.12.4-0ubuntu1
Architecture: amd64
Date: Tue Sep 24 14:56:51 2013
ExecutablePath: /usr/bin/compiz
MarkForUpload: True
ProcCmdline: compiz
ProcEnviron:
 LANGUAGE=de_AT:de
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_AT.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7faaedcc4bb8 <main_arena+1144>: add %ah,(%rdi)
 PC (0x7faaedcc4bb8) in non-executable VMA region: 0x7faaedcc4000-0x7faaedcc6000 rw-p /lib/x86_64-linux-gnu/libc-2.17.so
 source "%ah" ok
 destination "(%rdi)" (0x0275c078) ok
SegvReason: executing writable VMA /lib/x86_64-linux-gnu/libc-2.17.so
Signal: 11
SourcePackage: unity
StacktraceTop:
 main_arena () from /lib/x86_64-linux-gnu/libc.so.6
 unity::ui::EdgeBarrierController::Impl::SetupBarriers(std::vector<nux::Rect, std::allocator<nux::Rect> > const&) () from /usr/lib/compiz/libunityshell.so
 ?? () from /usr/lib/compiz/libunityshell.so
 unity::glib::Source::SourceCallback(void*) () from /usr/lib/libunity-core-6.0.so.7
 g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
Title: compiz crashed with SIGSEGV in main_arena()
UpgradeStatus: Upgraded to saucy on 2013-09-24 (0 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 main_arena () from /tmp/apport_sandbox_xu6LvH/lib/x86_64-linux-gnu/libc.so.6
 unity::ui::EdgeBarrierController::Impl::SetupBarriers(std::vector<nux::Rect, std::allocator<nux::Rect> > const&) () from /tmp/apport_sandbox_xu6LvH/usr/lib/compiz/libunityshell.so
 ?? () from /tmp/apport_sandbox_xu6LvH/usr/lib/compiz/libunityshell.so
 unity::glib::Source::SourceCallback(void*) () from /tmp/apport_sandbox_xu6LvH/usr/lib/libunity-core-6.0.so.7
 g_main_dispatch (context=0x1b41110) at /build/buildd/glib2.0-2.37.93/./glib/gmain.c:3065