compiz crashed with SIGSEGV in emit()

No idea what happened.

ProblemType: Crash
DistroRelease: Ubuntu 13.04
Package: unity 6.12.0daily13.03.29.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.8.0-15.25-generic 3.8.4
Uname: Linux 3.8.0-15-generic x86_64
ApportVersion: 2.9.2-0ubuntu5
Architecture: amd64
CheckboxSubmission: 2f383a1679e8525d7196eb2518a1921f
CheckboxSystem: bb422ca46d02494cdbc459927a98bc2f
CrashCounter: 1
Date: Sat Mar 30 18:20:34 2013
ExecutablePath: /usr/bin/compiz
InstallationDate: Installed on 2011-08-19 (589 days ago)
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110817)
MarkForUpload: True
ProcCmdline: compiz
SegvAnalysis:
 Segfault happened at: 0x7fecb559db83 <_ZN4sigc8internal10slot_call0IZN5unity8launcher9VolumeImp4ImplC1ERKNS2_4glib6ObjectI8_GVolumeEERKSt10shared_ptrINS2_11FileManagerEERKSC_INS3_25DeviceNotificationDisplayEEPS4_EUlvE1_vE7call_itEPNS0_8slot_repE+195>: cmp %r13,0x8(%r12)
 PC (0x7fecb559db83) ok
 source "%r13" ok
 destination "0x8(%r12)" (0x00000030) not located in a known VMA region (needed writable region)!
SegvReason: writing NULL VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 sigc::internal::slot_call0<unity::launcher::VolumeImp::Impl::Impl(unity::glib::Object<_GVolume> const&, std::shared_ptr<unity::FileManager> const&, std::shared_ptr<unity::launcher::DeviceNotificationDisplay> const&, unity::launcher::VolumeImp*)::{lambda()#3}, void>::call_it(sigc::internal::slot_rep*) () from /usr/lib/compiz/libunityshell.so
 unity::GnomeFileManager::Impl::OnOpenLocationsUpdated(_GVariant*) () from /usr/lib/compiz/libunityshell.so
 unity::glib::DBusProxy::Impl::OnPropertyChanged(_GDBusProxy*, _GVariant*, char***) () from /usr/lib/libunity-core-6.0.so.5
 ffi_call_unix64 () from /usr/lib/x86_64-linux-gnu/libffi.so.6
 ffi_call () from /usr/lib/x86_64-linux-gnu/libffi.so.6
Title: compiz crashed with SIGSEGV in sigc::internal::slot_call0<unity::launcher::VolumeImp::Impl::Impl()
UpgradeStatus: Upgraded to raring on 2013-01-17 (72 days ago)
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