--gdb output on program crash:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1251452000 (LWP 7061)]
0xb6c8e823 in sigc::internal::trackable_callback_list::remove_callback (
    this=0x9381458, data=0xb1701270) at libs/sigc++2/sigc++/trackable.cc:114
114         if ((*i).data_ == data)

--- Here starts gdb output from thread apply all bt

Thread 12 (Thread -1321026368 (LWP 7069)):
#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb6966803 in poll () from /lib/tls/i686/cmov/libc.so.6
#2  0xb7e4e53e in ARDOUR::Session::midi_thread_work (this=0x8ed3310)
    at libs/ardour/session_midi.cc:1208
#3  0xb7e4eacb in ARDOUR::Session::_midi_thread_work (arg=0x8ed3310)
    at libs/ardour/session_midi.cc:1129
#4  0xb69dc504 in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#5  0xb697051e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 11 (Thread -1320522560 (LWP 7068)):
#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb6966803 in poll () from /lib/tls/i686/cmov/libc.so.6
#2  0xb7e30410 in ARDOUR::Session::butler_thread_work (this=0x8ed3310)
    at libs/ardour/session_butler.cc:175
#3  0xb7e311d3 in ARDOUR::Session::_butler_thread_work (arg=0x8ed3310)
    at libs/ardour/session_butler.cc:156
#4  0xb69dc504 in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#5  0xb697051e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 7 (Thread -1251452000 (LWP 7061)):
#0  0xb6c8e823 in sigc::internal::trackable_callback_list::remove_callback (

    this=0x9381458, data=0xb1701270) at libs/sigc++2/sigc++/trackable.cc:114
#1  0xb6c8e9fe in sigc::trackable::remove_destroy_notify_callback (
    this=0x938dbd8, data=0xb1701270) at libs/sigc++2/sigc++/trackable.cc:58
#2  0x0835a3b0 in sigc::internal::slot_do_unbind::operator() (this=0xb5683c74, 
    t=0x938dbd8) at libs/sigc++2/sigc++/functors/slot_base.h:166
#3  0x08587441 in sigc::internal::limit_derived_target<sigc::trackable*, sigc::internal::slot_do_unbind>::with_type<true, LadspaPluginUI>::execute_ (
    _A_type=@0x938da00, _A_action=@0xb5683c74)
    at libs/sigc++2/sigc++/visit_each.h:67
#4  0x0858745c in sigc::internal::limit_derived_target<sigc::trackable*, sigc::internal::slot_do_unbind>::operator()<LadspaPluginUI> (this=0xb5683c74, 
    _A_type=@0x938da00) at libs/sigc++2/sigc++/visit_each.h:72
#5  0x08587476 in sigc::visit_each<sigc::internal::limit_derived_target<sigc::trackable*, sigc::internal::slot_do_unbind>, LadspaPluginUI> (
    _A_action=@0xb5683c74, _A_functor=@0x938da00)
    at libs/sigc++2/sigc++/visit_each.h:113
#6  0x085876fd in sigc::visit_each<sigc::internal::limit_derived_target<sigc::trackable*, sigc::internal::slot_do_unbind>, void, LadspaPluginUI, LadspaPluginUI::ControlUI*> (_A_action=@0xb5683c74, _A_target=@0xb1701290)
    at libs/sigc++2/sigc++/functors/mem_fun.h:1855
#7  0x0858771b in sigc::visit_each<sigc::internal::limit_derived_target<sigc::trackable*, sigc::internal::slot_do_unbind>, sigc::bound_mem_functor1<void, LadspaPluginUI, LadspaPluginUI::ControlUI*> > (_A_action=@0xb5683c74, 

    _A_target=@0xb170128c) at libs/sigc++2/sigc++/adaptors/adaptor_trait.h:264
#8  0x08587739 in sigc::visit_each<sigc::internal::limit_derived_target<sigc::trackable*, sigc::internal::slot_do_unbind>, sigc::bound_mem_functor1<void, LadspaPluginUI, LadspaPluginUI::ControlUI*>, LadspaPluginUI::ControlUI*> (
    _A_action=@0xb5683c74, _A_target=@0xb1701288)
    at libs/sigc++2/sigc++/adaptors/bind.h:1281
#9  0x0858777a in sigc::visit_each_type<sigc::trackable*, sigc::internal::slot_do_unbind, sigc::bind_functor<-1, sigc::bound_mem_functor1<void, LadspaPluginUI, LadspaPluginUI::ControlUI*>, LadspaPluginUI::ControlUI*, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil> > (_A_action=@0xb5683c9c, 
    _A_functor=@0xb1701288) at libs/sigc++2/sigc++/visit_each.h:124
#10 0x085877c4 in sigc::internal::typed_slot_rep<sigc::bind_functor<-1, sigc::bound_mem_functor1<void, LadspaPluginUI, LadspaPluginUI::ControlUI*>, LadspaPluginUI::ControlUI*, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil> >::destroy (data=0xb1701270) at libs/sigc++2/sigc++/functors/slot.h:60
#11 0x08358cba in sigc::internal::slot_rep::destroy (this=0xb1701270)
    at libs/sigc++2/sigc++/functors/slot_base.h:98
#12 0xb6c8f8ea in ~slot_rep (this=0xb1701270)
    at libs/sigc++2/sigc++/functors/slot_base.h:87
#13 0xb6c8f866 in ~slot_base (this=0xb5683d78)
    at libs/sigc++2/sigc++/functors/slot_base.cc:87
#14 0x0835a541 in ~slot0 (this=0xb5683d78)
    at libs/sigc++2/sigc++/functors/slot.h:422

#15 0x0835a555 in ~slot (this=0xb5683d78)
    at libs/sigc++2/sigc++/functors/slot.h:1067
#16 0x0857cd54 in LadspaPluginUI::parameter_changed (this=0x938da00, 
    abs_port_id=1, val=-8.34600258, cui=0x9390390)
    at gtk2_ardour/ladspa_pluginui.cc:613
#17 0x0858490d in sigc::bound_mem_functor3<void, LadspaPluginUI, unsigned int, float, LadspaPluginUI::ControlUI*>::operator() (this=0x9391530, 
    _A_a1=@0xb5683f04, _A_a2=@0xb5683f08, _A_a3=@0x939153c)
    at libs/sigc++2/sigc++/functors/mem_fun.h:1958
#18 0x0858493d in sigc::adaptor_functor<sigc::bound_mem_functor3<void, LadspaPluginUI, unsigned int, float, LadspaPluginUI::ControlUI*> >::operator()<unsigned int const&, float const&, LadspaPluginUI::ControlUI*&> (this=0x939152c, 
    _A_arg1=@0xb5683f04, _A_arg2=@0xb5683f08, _A_arg3=@0x939153c)
    at libs/sigc++2/sigc++/adaptors/adaptor_trait.h:123
#19 0x0858496c in sigc::bind_functor<-1, sigc::bound_mem_functor3<void, LadspaPluginUI, unsigned int, float, LadspaPluginUI::ControlUI*>, LadspaPluginUI::ControlUI*, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil>::operator()<unsigned int const&, float const&> (this=0x9391528, _A_arg1=@0xb5683f04, 
    _A_arg2=@0xb5683f08) at libs/sigc++2/sigc++/adaptors/bind.h:1144
#20 0x08584996 in sigc::internal::slot_call2<sigc::bind_functor<-1, sigc::bound_mem_functor3<void, LadspaPluginUI, unsigned int, float, LadspaPluginUI::ControlUI*>, LadspaPluginUI::ControlUI*, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil>, void, unsigned int, float>::call_it (rep=0x9391510, 

    a_1=@0xb5683f04, a_2=@0xb5683f08)
    at libs/sigc++2/sigc++/functors/slot.h:173
#21 0xb7da2275 in sigc::internal::signal_emit2<void, unsigned int, float, sigc::nil>::emit (impl=0x8f69e28, _A_a1=@0xb5683f04, _A_a2=@0xb5683f08)
    at libs/sigc++2/sigc++/signal.h:779
#22 0xb7da232c in sigc::signal2<void, unsigned int, float, sigc::nil>::emit (
    this=0x8f68fec, _A_a1=@0xb5683f04, _A_a2=@0xb5683f08)
    at libs/sigc++2/sigc++/signal.h:1806
#23 0xb7da235d in sigc::signal2<void, unsigned int, float, sigc::nil>::operator() (this=0x8f68fec, _A_a1=@0xb5683f04, _A_a2=@0xb5683f08)
    at libs/sigc++2/sigc++/signal.h:1810
#24 0xb7d9fdb4 in ARDOUR::LadspaPlugin::set_parameter (this=0x8f68fc8, 
    which=1, val=-8.34600258) at libs/ardour/ladspa_plugin.cc:281
#25 0xb7d81f89 in ARDOUR::PluginInsert::connect_and_run (this=0x8f66a38, 
    bufs=@0x8ed34c0, nbufs=1, nframes=1024, offset=0, with_auto=true, 
    now=1030144) at libs/ardour/insert.cc:294
#26 0xb7d821a5 in ARDOUR::PluginInsert::automation_run (this=0x8f66a38, 
    bufs=@0x8ed34c0, nbufs=1, nframes=1024, offset=0)
    at libs/ardour/insert.cc:413
#27 0xb7d82372 in ARDOUR::PluginInsert::run (this=0x8f66a38, bufs=@0x8ed34c0, 
    nbufs=1, nframes=1024, offset=0) at libs/ardour/insert.cc:362
#28 0xb7de3d56 in ARDOUR::Route::process_output_buffers (this=0x8f13bd8, 
    bufs=@0x8ed34c0, nbufs=1, start_frame=1030144, end_frame=1031168, 

    nframes=1024, offset=0, with_redirects=true, declick=0, meter=true)
    at libs/ardour/route.cc:360
#29 0xb7d058f7 in ARDOUR::AudioTrack::roll (this=0x8f13bd8, nframes=1024, 
    start_frame=1030144, end_frame=1031168, offset=0, declick=0, 
    can_record=false, rec_monitors_input=false)
    at libs/ardour/audio_track.cc:634
#30 0xb7e567ce in ARDOUR::Session::process_routes (this=0x8ed3310, 
    nframes=1024, offset=0) at libs/ardour/session_process.cc:138
#31 0xb7e57e3a in ARDOUR::Session::process_without_events (this=0x8ed3310, 
    nframes=1024) at libs/ardour/session_process.cc:775
#32 0xb7e580e2 in ARDOUR::Session::process_with_events (this=0x8ed3310, 
    nframes=1024) at libs/ardour/session_process.cc:284
#33 0xb7e5864a in ARDOUR::Session::process (this=0x8ed3310, nframes=1024)
    at libs/ardour/session_process.cc:61
#34 0xb7d0f443 in ARDOUR::AudioEngine::process_callback (this=0x8bd56a0, 
    nframes=1024) at libs/ardour/audioengine.cc:303
#35 0xb7d0f600 in ARDOUR::AudioEngine::_process_callback (nframes=1024, 
    arg=0x8bd56a0) at libs/ardour/audioengine.cc:257
#36 0xb6ada961 in jack_client_thread (arg=0x8bd5bd0) at client.c:1469
#37 0xb69dc504 in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#38 0xb697051e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 6 (Thread -1298547520 (LWP 7060)):

#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb6966803 in poll () from /lib/tls/i686/cmov/libc.so.6
#2  0xb7d2a26c in ARDOUR::AudioSource::peak_thread_work (arg=0x0)
    at libs/ardour/audiosource.cc:140
#3  0xb69dc504 in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#4  0xb697051e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 3 (Thread -1246110528 (LWP 7056)):
#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb69e2bf6 in __nanosleep_nocancel ()
   from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb768e2f2 in g_usleep () from /usr/lib/libglib-2.0.so.0
#3  0xb6d965e5 in Glib::usleep (microseconds=10000)
    at libs/glibmm2/glibmm/timer.cc:68
#4  0xb7d0eef6 in ARDOUR::AudioEngine::meter_thread (this=0x8bd56a0)
    at libs/ardour/audioengine.cc:413
#5  0xb7d11c56 in sigc::bound_mem_functor0<void, ARDOUR::AudioEngine>::operator() (this=0x8bd562c) at libs/sigc++2/sigc++/functors/mem_fun.h:1781
#6  0xb7d11c78 in sigc::adaptor_functor<sigc::bound_mem_functor0<void, ARDOUR::AudioEngine> >::operator() (this=0x8bd5628)
    at libs/sigc++2/sigc++/adaptors/adaptor_trait.h:251
#7  0xb7d11ca4 in sigc::internal::slot_call0<sigc::bound_mem_functor0<void, ARDOUR::AudioEngine>, void>::call_it (rep=0x8bd5610)

    at libs/sigc++2/sigc++/functors/slot.h:103
#8  0x0835393e in sigc::slot0<void>::operator() (this=0x8a9a500)
    at libs/sigc++2/sigc++/functors/slot.h:440
#9  0xb6db0693 in call_thread_entry_slot (data=0x8a9a500)
    at libs/glibmm2/glibmm/thread.cc:43
#10 0xb768c38f in g_thread_create_full () from /usr/lib/libglib-2.0.so.0
#11 0xb69dc504 in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#12 0xb697051e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 2 (Thread -1239384896 (LWP 7052)):
#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb6966803 in poll () from /lib/tls/i686/cmov/libc.so.6
#2  0xb7e927f5 in ARDOUR::OSC::osc_receiver (this=0x8a1f428)
    at libs/ardour/osc.cc:314
#3  0xb7e929bd in ARDOUR::OSC::_osc_receiver (arg=0x8a1f428)
    at libs/ardour/osc.cc:274
#4  0xb69dc504 in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#5  0xb697051e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread -1236493584 (LWP 7044)):
#0  0xb6c8e823 in sigc::internal::trackable_callback_list::remove_callback (
    this=0x9381458, data=0x92c6c00) at libs/sigc++2/sigc++/trackable.cc:114
#1  0xb6c8e9fe in sigc::trackable::remove_destroy_notify_callback (

    this=0x938dbd8, data=0x92c6c00) at libs/sigc++2/sigc++/trackable.cc:58
#2  0x0835a3b0 in sigc::internal::slot_do_unbind::operator() (this=0xbfbba3d4, 
    t=0x938dbd8) at libs/sigc++2/sigc++/functors/slot_base.h:166
#3  0x08587441 in sigc::internal::limit_derived_target<sigc::trackable*, sigc::internal::slot_do_unbind>::with_type<true, LadspaPluginUI>::execute_ (
    _A_type=@0x938da00, _A_action=@0xbfbba3d4)
    at libs/sigc++2/sigc++/visit_each.h:67
#4  0x0858745c in sigc::internal::limit_derived_target<sigc::trackable*, sigc::internal::slot_do_unbind>::operator()<LadspaPluginUI> (this=0xbfbba3d4, 
    _A_type=@0x938da00) at libs/sigc++2/sigc++/visit_each.h:72
#5  0x08587476 in sigc::visit_each<sigc::internal::limit_derived_target<sigc::trackable*, sigc::internal::slot_do_unbind>, LadspaPluginUI> (
    _A_action=@0xbfbba3d4, _A_functor=@0x938da00)
    at libs/sigc++2/sigc++/visit_each.h:113
#6  0x085876fd in sigc::visit_each<sigc::internal::limit_derived_target<sigc::trackable*, sigc::internal::slot_do_unbind>, void, LadspaPluginUI, LadspaPluginUI::ControlUI*> (_A_action=@0xbfbba3d4, _A_target=@0x92c6c20)
    at libs/sigc++2/sigc++/functors/mem_fun.h:1855
#7  0x0858771b in sigc::visit_each<sigc::internal::limit_derived_target<sigc::trackable*, sigc::internal::slot_do_unbind>, sigc::bound_mem_functor1<void, LadspaPluginUI, LadspaPluginUI::ControlUI*> > (_A_action=@0xbfbba3d4, 
    _A_target=@0x92c6c1c) at libs/sigc++2/sigc++/adaptors/adaptor_trait.h:264
#8  0x08587739 in sigc::visit_each<sigc::internal::limit_derived_target<sigc::tr
ackable*, sigc::internal::slot_do_unbind>, sigc::bound_mem_functor1<void, LadspaPluginUI, LadspaPluginUI::ControlUI*>, LadspaPluginUI::ControlUI*> (
    _A_action=@0xbfbba3d4, _A_target=@0x92c6c18)
    at libs/sigc++2/sigc++/adaptors/bind.h:1281
#9  0x0858777a in sigc::visit_each_type<sigc::trackable*, sigc::internal::slot_do_unbind, sigc::bind_functor<-1, sigc::bound_mem_functor1<void, LadspaPluginUI, LadspaPluginUI::ControlUI*>, LadspaPluginUI::ControlUI*, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil> > (_A_action=@0xbfbba3fc, 
    _A_functor=@0x92c6c18) at libs/sigc++2/sigc++/visit_each.h:124
#10 0x085877c4 in sigc::internal::typed_slot_rep<sigc::bind_functor<-1, sigc::bound_mem_functor1<void, LadspaPluginUI, LadspaPluginUI::ControlUI*>, LadspaPluginUI::ControlUI*, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil> >::destroy (data=0x92c6c00) at libs/sigc++2/sigc++/functors/slot.h:60
#11 0x08358cba in sigc::internal::slot_rep::destroy (this=0x92c6c00)
    at libs/sigc++2/sigc++/functors/slot_base.h:98
#12 0xb6c8f8ea in ~slot_rep (this=0x92c6c00)
    at libs/sigc++2/sigc++/functors/slot_base.h:87
#13 0xb6c8f866 in ~slot_base (this=0xbfbba4f0)
    at libs/sigc++2/sigc++/functors/slot_base.cc:87
#14 0x0835a541 in ~slot0 (this=0xbfbba4f0)
    at libs/sigc++2/sigc++/functors/slot.h:422
#15 0x0835a555 in ~slot (this=0xbfbba4f0)
    at libs/sigc++2/sigc++/functors/slot.h:1067

#16 0xb7b0de37 in ~UIRequest (this=0xbfbba4c4)
    at libs/gtkmm2ext/gtkmm2ext/gtk_ui.h:85
#17 0xb7b0e117 in AbstractUI<Gtkmm2ext::UIRequest>::handle_ui_requests (
    this=0x87f0d78) at libs/pbd/pbd/abstract_ui.cc:112
#18 0xb7b04536 in Gtkmm2ext::UI::signal_pipe_callback (arg=0x87f0d68, fd=6, 
    cond=GDK_INPUT_READ) at libs/gtkmm2ext/gtk_ui.cc:334
#19 0xb71d85ae in gdk_input_add () from /usr/lib/libgdk-x11-2.0.so.0
#20 0xb7697c8d in g_io_channel_unix_get_fd () from /usr/lib/libglib-2.0.so.0
#21 0xb766e802 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#22 0xb76717df in g_main_context_check () from /usr/lib/libglib-2.0.so.0
#23 0xb7671b89 in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#24 0xb7379574 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#25 0xb78a0801 in Gtk::Main::run_impl (this=0x87f0d28)
    at libs/gtkmm2/gtk/gtkmm/main.cc:503
#26 0xb78a060e in Gtk::Main::run () at libs/gtkmm2/gtk/gtkmm/main.cc:450
#27 0xb7b04891 in Gtkmm2ext::UI::run (this=0x87f0d68, old_receiver=@0x87cbbe4)
    at libs/gtkmm2ext/gtk_ui.cc:214
#28 0x0859d00b in main (argc=1, argv=0xbfbba954) at gtk2_ardour/main.cc:464
0xb6c8e823      114         if ((*i).data_ == data)