Thread 1 "ardour-5.1.252" received signal SIGSEGV, Segmentation fault.
0x0000555555ba3aa6 in RCUManager<std::__cxx11::list<boost::shared_ptr<ARDOUR::Route>, std::allocator<boost::shared_ptr<ARDOUR::Route> > > >::reader (this=0x21a0)
    at /home/lentferj/git-repos/mixbus32C/libs/pbd/pbd/rcu.h:58
58		boost::shared_ptr<T> reader () const { return *((boost::shared_ptr<T> *) g_atomic_pointer_get (&x.gptr)); }
(gdb) bt
#0  0x0000555555ba3aa6 in RCUManager<std::__cxx11::list<boost::shared_ptr<ARDOUR::Route>, std::allocator<boost::shared_ptr<ARDOUR::Route> > > >::reader (this=0x21a0)
    at /home/lentferj/git-repos/mixbus32C/libs/pbd/pbd/rcu.h:58
#1  0x00007ffff6dafc77 in ARDOUR::Session::get_routes_with_internal_returns[abi:cxx11]() const (this=0x0) at ../libs/ardour/session.cc:4531
#2  0x000055555637c4f8 in ProcessorBox::build_possible_aux_menu (this=0x55555888dcb0) at ../gtk2_ardour/processor_box.cc:2124
#3  0x000055555637caea in ProcessorBox::show_processor_menu (this=0x55555888dcb0, arg=868063746) at ../gtk2_ardour/processor_box.cc:2175
#4  0x000055555637ddf2 in ProcessorBox::processor_button_press_event (this=0x55555888dcb0, ev=0x555564f4c350, child=0x0) at ../gtk2_ardour/processor_box.cc:2431
#5  0x000055555639f44a in sigc::bound_mem_functor2<bool, ProcessorBox, _GdkEventButton*, ProcessorEntry*>::operator() (this=0x55555913c568, _A_a1=@0x7fffffffc4f0: 0x555564f4c350, _A_a2=@0x7fffffffc4e8: 0x0)
    at /usr/include/sigc++-2.0/sigc++/functors/mem_fun.h:2143
#6  0x000055555639b8fd in sigc::adaptor_functor<sigc::bound_mem_functor2<bool, ProcessorBox, _GdkEventButton*, ProcessorEntry*> >::operator()<_GdkEventButton* const&, ProcessorEntry* const&> (this=0x55555913c560,
    _A_arg1=@0x7fffffffc4f0: 0x555564f4c350, _A_arg2=@0x7fffffffc4e8: 0x0) at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:108
#7  0x0000555556397894 in sigc::internal::slot_call<sigc::bound_mem_functor2<bool, ProcessorBox, _GdkEventButton*, ProcessorEntry*>, bool, _GdkEventButton*, ProcessorEntry*>::call_it (rep=0x55555913c530,
    a_#0=@0x7fffffffc4f0: 0x555564f4c350, a_#1=@0x7fffffffc4e8: 0x0) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:429
#8  0x000055555639e826 in sigc::internal::signal_emit2<bool, _GdkEventButton*, ProcessorEntry*, sigc::nil>::emit (impl=0x55555913c590, _A_a1=@0x7fffffffc4f0: 0x555564f4c350, _A_a2=@0x7fffffffc4e8: 0x0)
    at /usr/include/sigc++-2.0/sigc++/signal.h:1205
#9  0x000055555639afc9 in sigc::signal2<bool, _GdkEventButton*, ProcessorEntry*, sigc::nil>::emit (this=0x55555888de10, _A_a1=@0x7fffffffc4f0: 0x555564f4c350, _A_a2=@0x7fffffffc4e8: 0x0)
    at /usr/include/sigc++-2.0/sigc++/signal.h:3108
#10 0x0000555556396f21 in sigc::signal2<bool, _GdkEventButton*, ProcessorEntry*, sigc::nil>::operator() (this=0x55555888de10, _A_a1=@0x7fffffffc4f0: 0x555564f4c350, _A_a2=@0x7fffffffc4e8: 0x0)
    at /usr/include/sigc++-2.0/sigc++/signal.h:3124
#11 0x0000555556392417 in Gtkmm2ext::DnDVBox<ProcessorEntry>::button_press (this=0x55555888dde8, ev=0x555564f4c350, child=0x0) at /home/lentferj/git-repos/mixbus32C/libs/gtkmm2ext/gtkmm2ext/dndvbox.h:600
#12 0x00005555563a708e in sigc::bound_mem_functor2<bool, Gtkmm2ext::DnDVBox<ProcessorEntry>, _GdkEventButton*, ProcessorEntry*>::operator() (this=0x55555888e0c0, _A_a1=@0x7fffffffc5f8: 0x555564f4c350,
    _A_a2=@0x55555888e0e0: 0x0) at /usr/include/sigc++-2.0/sigc++/functors/mem_fun.h:2143
#13 0x00005555563a4e85 in sigc::adaptor_functor<sigc::bound_mem_functor2<bool, Gtkmm2ext::DnDVBox<ProcessorEntry>, _GdkEventButton*, ProcessorEntry*> >::operator()<_GdkEventButton* const&, ProcessorEntry*&> (
    this=0x55555888e0b8, _A_arg1=@0x7fffffffc5f8: 0x555564f4c350, _A_arg2=@0x55555888e0e0: 0x0) at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:108
#14 0x00005555563a1ffc in sigc::bind_functor<-1, sigc::bound_mem_functor2<bool, Gtkmm2ext::DnDVBox<ProcessorEntry>, _GdkEventButton*, ProcessorEntry*>, ProcessorEntry*, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil>::operator()<_GdkEventButton* const&> (this=0x55555888e0b0, _A_arg1=@0x7fffffffc5f8: 0x555564f4c350) at /usr/include/sigc++-2.0/sigc++/adaptors/bind.h:1136
#15 0x000055555639eab4 in sigc::internal::slot_call1<sigc::bind_functor<-1, sigc::bound_mem_functor2<bool, Gtkmm2ext::DnDVBox<ProcessorEntry>, _GdkEventButton*, ProcessorEntry*>, ProcessorEntry*, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil>, bool, _GdkEventButton*>::call_it (rep=0x55555888e080, a_1=@0x7fffffffc5f8: 0x555564f4c350) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:148
#16 0x00007ffff08c0acd in ?? () from /usr/lib/x86_64-linux-gnu/libgtkmm-2.4.so.1
#17 0x00007ffff27cc7bc in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#18 0x00007ffff3410f75 in g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#19 0x00007ffff3423053 in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#20 0x00007ffff342b67f in g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#21 0x00007ffff342bfbf in g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#22 0x00007ffff28e48ac in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#23 0x00007ffff27caf84 in gtk_propagate_event () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#24 0x00007ffff27cb33b in gtk_main_do_event () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#25 0x00007ffff2440cbc in ?? () from /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
#26 0x00007ffff31377f7 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007ffff3137a60 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007ffff3137d82 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007ffff27ca3b7 in gtk_main () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#30 0x00007ffff470bb64 in Gtkmm2ext::UI::run (this=0x555557292d40, old_receiver=...) at ../libs/gtkmm2ext/gtk_ui.cc:284
#31 0x00005555560ea5b1 in main (argc=1, argv=0x7fffffffd148) at ../gtk2_ardour/main.cc:426
(gdb)