#0  0x00007f863004e31c in __dynamic_cast () from /tmp/apport_sandbox_hUU_ec/usr/lib/x86_64-linux-gnu/libstdc++.so.6
#1  0x00007f86109b9069 in nux_base_window_accessible_check_active () from /tmp/apport_sandbox_hUU_ec/usr/lib/compiz/libunityshell.so
#2  0x00007f8610a145bf in ?? () from /tmp/apport_sandbox_hUU_ec/usr/lib/compiz/libunityshell.so
#3  0x00007f8610a14922 in ?? () from /tmp/apport_sandbox_hUU_ec/usr/lib/compiz/libunityshell.so
#4  0x00007f8610a14b3a in ?? () from /tmp/apport_sandbox_hUU_ec/usr/lib/compiz/libunityshell.so
#5  0x00007f8610a15d2a in sigc::pointer_functor3<nux::BaseWindow*, _UnityRootAccessible*, int, void>::operator()(nux::BaseWindow* const&, _UnityRootAccessible* const&, int const&) const () from /tmp/apport_sandbox_hUU_ec/usr/lib/compiz/libunityshell.so
#6  0x00007f8610a15c3e in sigc::adaptor_functor<sigc::pointer_functor3<nux::BaseWindow*, _UnityRootAccessible*, int, void> >::deduce_result_type<nux::BaseWindow* const&, _UnityRootAccessible*&, int&, void, void, void, void>::type sigc::adaptor_functor<sigc::pointer_functor3<nux::BaseWindow*, _UnityRootAccessible*, int, void> >::operator()<nux::BaseWindow* const&, _UnityRootAccessible*&, int&>(nux::BaseWindow* const&, _UnityRootAccessible*&, int&) const () from /tmp/apport_sandbox_hUU_ec/usr/lib/compiz/libunityshell.so
#7  0x00007f8610a15b52 in sigc::bind_functor<-1, sigc::pointer_functor3<nux::BaseWindow*, _UnityRootAccessible*, int, void>, _UnityRootAccessible*, int, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil>::deduce_result_type<nux::BaseWindow* const&, void, void, void, void, void, void>::type sigc::bind_functor<-1, sigc::pointer_functor3<nux::BaseWindow*, _UnityRootAccessible*, int, void>, _UnityRootAccessible*, int, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil>::operator()<nux::BaseWindow* const&>(nux::BaseWindow* const&) () from /tmp/apport_sandbox_hUU_ec/usr/lib/compiz/libunityshell.so
#8  0x00007f8610a15986 in sigc::internal::slot_call1<sigc::bind_functor<-1, sigc::pointer_functor3<nux::BaseWindow*, _UnityRootAccessible*, int, void>, _UnityRootAccessible*, int, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil>, void, nux::BaseWindow*>::call_it(sigc::internal::slot_rep*, nux::BaseWindow* const&) () from /tmp/apport_sandbox_hUU_ec/usr/lib/compiz/libunityshell.so
#9  0x00007f860ec4997d in emit (_A_a1=@0x7fff23299af0: 0x23755b0, impl=0x1f53880) at /usr/include/sigc++-2.0/sigc++/signal.h:1010
  [Error: /usr/include/sigc++-2.0/sigc++/signal.h was not found in source tree]
#10 emit (this=<optimized out>, _A_a1=@0x7fff23299af0: 0x23755b0) at /usr/include/sigc++-2.0/sigc++/signal.h:2781
  [Error: /usr/include/sigc++-2.0/sigc++/signal.h was not found in source tree]
#11 nux::BaseWindow::ShowWindow (this=0x23755b0, visible=<optimized out>, StartModal=<optimized out>) at ./BaseWindow.cpp:396
  [Error: ./BaseWindow.cpp was not found in source tree]
#12 0x00007f8610b29668 in unity::CairoBaseWindow::Show() () from /tmp/apport_sandbox_hUU_ec/usr/lib/compiz/libunityshell.so
#13 0x00007f8610bb1f37 in unity::Tooltip::ShowTooltipWithTipAt(int, int) () from /tmp/apport_sandbox_hUU_ec/usr/lib/compiz/libunityshell.so
#14 0x00007f8610b7b814 in unity::launcher::LauncherIcon::ShowTooltip() () from /tmp/apport_sandbox_hUU_ec/usr/lib/compiz/libunityshell.so
#15 0x00007f8610bb4bbf in ?? () from /tmp/apport_sandbox_hUU_ec/usr/lib/compiz/libunityshell.so
#16 0x00007f8610bb4e7a in ?? () from /tmp/apport_sandbox_hUU_ec/usr/lib/compiz/libunityshell.so
#17 0x00007f860e818866 in std::function<bool ()>::operator()() const () from /tmp/apport_sandbox_hUU_ec/usr/lib/libunity-core-6.0.so.9
#18 0x00007f860e85986b in unity::glib::Source::SourceCallback(void*) () from /tmp/apport_sandbox_hUU_ec/usr/lib/libunity-core-6.0.so.9
#19 0x00007f862e35f723 in ?? ()
#20 0x000000000154b160 in ?? ()
#21 0x0000000000000000 in ?? ()