Comment 2 for bug 846001

StacktraceTop:
 unity::FilterBar::RemoveFilter (this=0x918fdd8, filter=...) at /build/buildd/unity-4.14.2/plugins/unityshell/src/FilterBar.cpp:74
 unity::dash::LensView::OnFilterRemoved (this=0x92723e8, filter=...) at /build/buildd/unity-4.14.2/plugins/unityshell/src/LensView.cpp:261
 operator() (_A_a1=..., this=0x9190834) at /usr/include/sigc++-2.0/sigc++/functors/mem_fun.h:1851
 operator()<const std::shared_ptr<unity::dash::Filter>&> (_A_arg1=..., this=0x9190830) at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:84
 sigc::internal::slot_call1<sigc::bound_mem_functor1<void, unity::dash::LensView, std::shared_ptr<unity::dash::Filter> >, void, std::shared_ptr<unity::dash::Filter> >::call_it (rep=0x9190818, a_1=...) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:137