#0  0x00000000067edbc0 in ?? ()
#1  0x000000000113f236 in Drag::end_grab (this=0x6d98860, event=0x7fffffffc6a0)
    at ../gtk2_ardour/editor_drag.cc:318
#2  0x000000000113ea2f in DragManager::end_grab (this=0x2c745f0, e=0x7fffffffc6a0)
    at ../gtk2_ardour/editor_drag.cc:155
#3  0x0000000001191e56 in Editor::button_release_handler (this=0x2b51770, item=0x80d86e0, 
    event=0x7fffffffc6a0, item_type=TempoMarkerItem) at ../gtk2_ardour/editor_mouse.cc:1198
#4  0x0000000001138f79 in Editor::typed_event (this=0x2b51770, item=0x80d86e0, event=0x7fffffffc6a0, 
    type=TempoMarkerItem) at ../gtk2_ardour/editor_canvas_events.cc:222
#5  0x000000000113a9a7 in Editor::canvas_tempo_marker_event (this=0x2b51770, event=0x7fffffffc6a0, 
    item=0x80d86e0) at ../gtk2_ardour/editor_canvas_events.cc:1015
#6  0x0000000001367e5c in sigc::bound_mem_functor3<bool, PublicEditor, _GdkEvent*, ArdourCanvas::Item*, TempoMarker*>::operator() (this=0x71416f0, _A_a1=@0x7fffffffc580: 0x7fffffffc6a0, 
    _A_a2=@0x7fffffffc318: 0x80d86e0, _A_a3=@0x7141718: 0x6ef2c30)
    at /usr/include/sigc++-2.0/sigc++/functors/mem_fun.h:1985
#7  0x0000000001367995 in sigc::adaptor_functor<sigc::bound_mem_functor3<bool, PublicEditor, _GdkEvent*, ArdourCanvas::Item*, TempoMarker*> >::operator()<_GdkEvent* const&, ArdourCanvas::Container*&, TempoMarker*&> (this=0x71416e8, _A_arg1=@0x7fffffffc580: 0x7fffffffc6a0, _A_arg2=@0x7141710: 0x80d86e0, 
    _A_arg3=@0x7141718: 0x6ef2c30) at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:123
#8  0x0000000001367424 in sigc::bind_functor<-1, sigc::bound_mem_functor3<bool, PublicEditor, _GdkEvent*, ArdourCanvas::Item*, TempoMarker*>, ArdourCanvas::Container*, TempoMarker*, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil>::operator()<_GdkEvent* const&> (this=0x71416e0, 
    _A_arg1=@0x7fffffffc580: 0x7fffffffc6a0) at /usr/include/sigc++-2.0/sigc++/adaptors/bind.h:1336
#9  0x0000000001366cca in sigc::internal::slot_call1<sigc::bind_functor<-1, sigc::bound_mem_functor3<bool, PublicEditor, _GdkEvent*, ArdourCanvas::Item*, TempoMarker*>, ArdourCanvas::Container*, TempoMarker*, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil>, bool, _GdkEvent*>::call_it (rep=0x71416b0, 
    a_1=@0x7fffffffc580: 0x7fffffffc6a0) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:137
#10 0x00007ffff79119c7 in sigc::internal::signal_emit1<bool, _GdkEvent*, ArdourCanvas::Item::EventAccumulator<bool> >::operator() (this=0x7fffffffc430, _A_slot=...) at /usr/include/sigc++-2.0/sigc++/signal.h:830
#11 0x00007ffff79115dd in sigc::internal::slot_iterator_buf<sigc::internal::signal_emit1<bool, _GdkEvent*, ArdourCanvas::Item::EventAccumulator<bool> >, bool>::operator* (this=0x7fffffffc3f0)
    at /usr/include/sigc++-2.0/sigc++/signal.h:302
#12 0x00007ffff7910fdb in ArdourCanvas::Item::EventAccumulator<bool>::operator()<sigc::internal::slot_iterator_buf<sigc::internal::signal_emit1<bool, _GdkEvent*, ArdourCanvas::Item::EventAccumulator<bool> >, bool> > (this=0x7fffffffc45f, first=..., last=...) at /mnt/part/src/ardour/libs/canvas/canvas/item.h:214
#13 0x00007ffff79106d0 in sigc::internal::signal_emit1<bool, _GdkEvent*, ArdourCanvas::Item::EventAccumulator<bool> >::emit (impl=0x6c8ec00, _A_a1=@0x7fffffffc580: 0x7fffffffc6a0)
    at /usr/include/sigc++-2.0/sigc++/signal.h:850
#14 0x00007ffff790f3b7 in sigc::signal1<bool, _GdkEvent*, ArdourCanvas::Item::EventAccumulator<bool> >::emit (this=0x80d8750, _A_a1=@0x7fffffffc580: 0x7fffffffc6a0)
    at /usr/include/sigc++-2.0/sigc++/signal.h:2777
#15 0x00007ffff790d8ad in sigc::signal1<bool, _GdkEvent*, ArdourCanvas::Item::EventAccumulator<bool> >::operator() (this=0x80d8750, _A_a1=@0x7fffffffc580: 0x7fffffffc6a0)
    at /usr/include/sigc++-2.0/sigc++/signal.h:2785
#16 0x00007ffff79094e7 in ArdourCanvas::GtkCanvas::deliver_event (this=0x2d38768, event=0x7fffffffc6a0)
    at ../libs/canvas/canvas.cc:690
#17 0x00007ffff790a721 in ArdourCanvas::GtkCanvas::on_button_release_event (this=0x2d38768, ev=0x813e8a0)
    at ../libs/canvas/canvas.cc:916
#18 0x00007ffff1e140b4 in Gtk::Widget_Class::button_release_event_callback(_GtkWidget*, _GdkEventButton*)