ardour-3.0: ../gtk2_ardour/midi_region_view.cc:803: void MidiRegionView::create_note_at(ARDOUR::framepos_t, double, double, bool, bool): Assertion `length != 0' failed.

Program received signal SIGABRT, Aborted.
0x00007fffebebda75 in raise () from /lib/libc.so.6
(gdb) thread apply all bt

Thread 23 (Thread 0x7fffc6f93700 (LWP 2572)):
#0  0x00007fffec218bc9 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007ffff2ef2532 in g_cond_timed_wait_posix_impl (cond=0x2bb5414, entered_mutex=0x189, abs_time=<value optimized out>) at gthread-posix.c:242
#2  0x00007ffff2a23851 in ?? () from /lib/libglib-2.0.so.0
#3  0x00007ffff2a23997 in g_async_queue_timed_pop () from /lib/libglib-2.0.so.0
#4  0x00007ffff2a739c8 in ?? () from /lib/libglib-2.0.so.0
#5  0x00007ffff2a71b84 in ?? () from /lib/libglib-2.0.so.0
#6  0x00007fffec2139ca in start_thread () from /lib/libpthread.so.0
#7  0x00007fffebf7070d in clone () from /lib/libc.so.6
#8  0x0000000000000000 in ?? ()

Thread 22 (Thread 0x7fffa0acd820 (LWP 2571)):
#0  0x00007fffec21c11d in nanosleep () from /lib/libpthread.so.0
#1  0x00007ffff2a747d8 in g_usleep () from /lib/libglib-2.0.so.0
#2  0x00007ffff6977a5a in ARDOUR::AudioEngine::meter_thread (this=0x2f2de10) at ../libs/ardour/audioengine.cc:691
#3  0x00007ffff69990d9 in boost::_mfi::mf0<void, ARDOUR::AudioEngine>::operator() (this=0x7fffdec36670, p=0x2f2de10) at /usr/local/include/boost/bind/mem_fn_template.hpp:49
#4  0x00007ffff69944d8 in boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> >::operator()<boost::_mfi::mf0<void, ARDOUR::AudioEngine>, boost::_bi::list0> (
    this=0x7fffdec36680, f=..., a=...) at /usr/local/include/boost/bind/bind.hpp:253
#5  0x00007ffff698ff1b in boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AudioEngine>, boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> > >::operator() (
    this=0x7fffdec36670) at /usr/local/include/boost/bind/bind_template.hpp:20
#6  0x00007ffff698afde in sigc::adaptor_functor<boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AudioEngine>, boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> > > >::operator() (this=0x7fffdec36670) at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#7  0x00007ffff69865e4 in sigc::internal::slot_call0<boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AudioEngine>, boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> > >, void>::call_it (rep=0x7fffdec36640) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:103
#8  0x00007ffff3577862 in ?? () from /usr/lib/libglibmm-2.4.so.1
#9  0x00007ffff2a71b84 in ?? () from /lib/libglib-2.0.so.0
#10 0x00007fffec2139ca in start_thread () from /lib/libpthread.so.0
#11 0x00007fffebf7070d in clone () from /lib/libc.so.6
#12 0x0000000000000000 in ?? ()

Thread 21 (Thread 0x7fffc80ae700 (LWP 2570)):
#0  0x00007fffebf63f93 in poll () from /lib/libc.so.6
#1  0x00007ffff2a4c4a9 in ?? () from /lib/libglib-2.0.so.0
#2  0x00007ffff2a4cc55 in g_main_loop_run () from /lib/libglib-2.0.so.0
#3  0x00007ffff4acf205 in BaseUI::main_thread (this=0x4fd89f0) at ../libs/pbd/base_ui.cc:77
#4  0x00007ffff4ad06b1 in sigc::bound_mem_functor0<void, BaseUI>::operator() (this=0x4fe2f38) at /usr/include/sigc++-2.0/sigc++/functors/mem_fun.h:1787
#5  0x00007ffff4ad050c in sigc::adaptor_functor<sigc::bound_mem_functor0<void, BaseUI> >::operator() (this=0x4fe2f30) at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#6  0x00007ffff4ad0265 in sigc::internal::slot_call0<sigc::bound_mem_functor0<void, BaseUI>, void>::call_it (rep=0x4fe2f00) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:103
#7  0x00007ffff3577862 in ?? () from /usr/lib/libglibmm-2.4.so.1
#8  0x00007ffff2a71b84 in ?? () from /lib/libglib-2.0.so.0
#9  0x00007fffec2139ca in start_thread () from /lib/libpthread.so.0
#10 0x00007fffebf7070d in clone () from /lib/libc.so.6
#11 0x0000000000000000 in ?? ()

Thread 20 (Thread 0x7fffa0b48820 (LWP 2569)):
#0  0x00007fffebf63f93 in poll () from /lib/libc.so.6
#1  0x00007ffff69ff6aa in ARDOUR::Butler::thread_work (this=0x4a40f50) at ../libs/ardour/butler.cc:153
#2  0x00007ffff69ff61e in ARDOUR::Butler::_thread_work (arg=0x4a40f50) at ../libs/ardour/butler.cc:137
#3  0x00007ffff4b0a128 in fake_thread_start (arg=0x2efc300) at ../libs/pbd/pthread_utils.cc:81
#4  0x00007fffec2139ca in start_thread () from /lib/libpthread.so.0
#5  0x00007fffebf7070d in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 19 (Thread 0x7fffa0bca700 (LWP 2568)):
#0  0x00007fffec21ab50 in sem_wait () from /lib/libpthread.so.0
#1  0x00007ffff6af90c6 in PBD::ProcessSemaphore::wait (this=0x4f3b008) at /home/dave/Downloads/ardour_subversion/3.0/libs/pbd/pbd/semutils.h:41
#2  0x00007ffff6af6955 in ARDOUR::Graph::restart_cycle (this=0x4f3af20) at ../libs/ardour/graph.cc:263
#3  0x00007ffff6af691f in ARDOUR::Graph::dec_ref (this=0x4f3af20) at ../libs/ardour/graph.cc:250
#4  0x00007ffff6afdfca in ARDOUR::GraphNode::finish (this=0x7fffdebdf390, chain=1) at ../libs/ardour/graphnode.cc:71
---Type <return> to continue, or q <return> to quit--- 
#5  0x00007ffff6af763e in ARDOUR::Graph::run_one (this=0x4f3af20) at ../libs/ardour/graph.cc:403
#6  0x00007ffff6af77c2 in ARDOUR::Graph::helper_thread (this=0x4f3af20) at ../libs/ardour/graph.cc:420
#7  0x00007ffff6afd383 in boost::_mfi::mf0<void, ARDOUR::Graph>::operator() (this=0x7fffa0bc9c78, p=0x4f3af20) at /usr/local/include/boost/bind/mem_fn_template.hpp:49
#8  0x00007ffff6afcd6e in boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> >::operator()<boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list0> (this=0x7fffa0bc9c88, f=..., 
    a=...) at /usr/local/include/boost/bind/bind.hpp:253
#9  0x00007ffff6afc90b in boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> > >::operator() (this=0x7fffa0bc9c78)
    at /usr/local/include/boost/bind/bind_template.hpp:20
#10 0x00007ffff6afc3ca in boost::detail::function::void_function_obj_invoker0<boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> > >, void>::invoke (function_obj_ptr=...) at /usr/local/include/boost/function/function_template.hpp:153
#11 0x00000000010aa721 in boost::function0<void>::operator() (this=0x7fffa0bc9c70) at /usr/local/include/boost/function/function_template.hpp:1013
#12 0x00007ffff697aca1 in ARDOUR::AudioEngine::_start_process_thread (arg=0x4f4b850) at ../libs/ardour/audioengine.cc:1475
#13 0x00007fffec2139ca in start_thread () from /lib/libpthread.so.0
#14 0x00007fffebf7070d in clone () from /lib/libc.so.6
#15 0x0000000000000000 in ?? ()

Thread 18 (Thread 0x7fffa0c4b700 (LWP 2567)):
#0  0x00007fffec21ab50 in sem_wait () from /lib/libpthread.so.0
#1  0x00007ffff6af90c6 in PBD::ProcessSemaphore::wait (this=0x4f3afe8) at /home/dave/Downloads/ardour_subversion/3.0/libs/pbd/pbd/semutils.h:41
#2  0x00007ffff6af7466 in ARDOUR::Graph::run_one (this=0x4f3af20) at ../libs/ardour/graph.cc:389
#3  0x00007ffff6af77c2 in ARDOUR::Graph::helper_thread (this=0x4f3af20) at ../libs/ardour/graph.cc:420
#4  0x00007ffff6afd383 in boost::_mfi::mf0<void, ARDOUR::Graph>::operator() (this=0x7fffa0c4ac78, p=0x4f3af20) at /usr/local/include/boost/bind/mem_fn_template.hpp:49
#5  0x00007ffff6afcd6e in boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> >::operator()<boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list0> (this=0x7fffa0c4ac88, f=..., 
    a=...) at /usr/local/include/boost/bind/bind.hpp:253
#6  0x00007ffff6afc90b in boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> > >::operator() (this=0x7fffa0c4ac78)
    at /usr/local/include/boost/bind/bind_template.hpp:20
#7  0x00007ffff6afc3ca in boost::detail::function::void_function_obj_invoker0<boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> > >, void>::invoke (function_obj_ptr=...) at /usr/local/include/boost/function/function_template.hpp:153
#8  0x00000000010aa721 in boost::function0<void>::operator() (this=0x7fffa0c4ac70) at /usr/local/include/boost/function/function_template.hpp:1013
#9  0x00007ffff697aca1 in ARDOUR::AudioEngine::_start_process_thread (arg=0x4f4b3b0) at ../libs/ardour/audioengine.cc:1475
#10 0x00007fffec2139ca in start_thread () from /lib/libpthread.so.0
#11 0x00007fffebf7070d in clone () from /lib/libc.so.6
#12 0x0000000000000000 in ?? ()

Thread 17 (Thread 0x7fffa0ccc700 (LWP 2566)):
#0  0x00007fffec21ab50 in sem_wait () from /lib/libpthread.so.0
#1  0x00007ffff6af90c6 in PBD::ProcessSemaphore::wait (this=0x4f3afe8) at /home/dave/Downloads/ardour_subversion/3.0/libs/pbd/pbd/semutils.h:41
#2  0x00007ffff6af7466 in ARDOUR::Graph::run_one (this=0x4f3af20) at ../libs/ardour/graph.cc:389
#3  0x00007ffff6af7ab6 in ARDOUR::Graph::main_thread (this=0x4f3af20) at ../libs/ardour/graph.cc:458
#4  0x00007ffff6afd383 in boost::_mfi::mf0<void, ARDOUR::Graph>::operator() (this=0x7fffa0ccbc78, p=0x4f3af20) at /usr/local/include/boost/bind/mem_fn_template.hpp:49
#5  0x00007ffff6afcd6e in boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> >::operator()<boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list0> (this=0x7fffa0ccbc88, f=..., 
    a=...) at /usr/local/include/boost/bind/bind.hpp:253
#6  0x00007ffff6afc90b in boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> > >::operator() (this=0x7fffa0ccbc78)
    at /usr/local/include/boost/bind/bind_template.hpp:20
#7  0x00007ffff6afc3ca in boost::detail::function::void_function_obj_invoker0<boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> > >, void>::invoke (function_obj_ptr=...) at /usr/local/include/boost/function/function_template.hpp:153
#8  0x00000000010aa721 in boost::function0<void>::operator() (this=0x7fffa0ccbc70) at /usr/local/include/boost/function/function_template.hpp:1013
#9  0x00007ffff697aca1 in ARDOUR::AudioEngine::_start_process_thread (arg=0x4f4b3b0) at ../libs/ardour/audioengine.cc:1475
#10 0x00007fffec2139ca in start_thread () from /lib/libpthread.so.0
#11 0x00007fffebf7070d in clone () from /lib/libc.so.6
#12 0x0000000000000000 in ?? ()

Thread 16 (Thread 0x7fffa0d4d700 (LWP 2565)):
#0  0x00007fffec21ac37 in sem_timedwait () from /lib/libpthread.so.0
#1  0x00007fffedb0f7b0 in ?? () from /usr/lib/libjack.so.0
#2  0x00007fffedafb36a in ?? () from /usr/lib/libjack.so.0
#3  0x00007fffedaf7b77 in ?? () from /usr/lib/libjack.so.0
#4  0x00007ffff6976c62 in ARDOUR::AudioEngine::process_thread (this=0x2f2de10) at ../libs/ardour/audioengine.cc:441
#5  0x00007ffff697661a in ARDOUR::AudioEngine::_process_thread (arg=0x2f2de10) at ../libs/ardour/audioengine.cc:352
#6  0x00007fffedaf9578 in ?? () from /usr/lib/libjack.so.0
#7  0x00007fffedb0f180 in ?? () from /usr/lib/libjack.so.0
---Type <return> to continue, or q <return> to quit---
#8  0x00007fffec2139ca in start_thread () from /lib/libpthread.so.0
#9  0x00007fffebf7070d in clone () from /lib/libc.so.6
#10 0x0000000000000000 in ?? ()

Thread 15 (Thread 0x7fffc782c700 (LWP 2564)):
#0  0x00007fffec21b93d in read () from /lib/libpthread.so.0
#1  0x00007fffedb10a92 in ?? () from /usr/lib/libjack.so.0
#2  0x00007fffedb14a94 in ?? () from /usr/lib/libjack.so.0
#3  0x00007fffedb0f180 in ?? () from /usr/lib/libjack.so.0
#4  0x00007fffec2139ca in start_thread () from /lib/libpthread.so.0
#5  0x00007fffebf7070d in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 14 (Thread 0x7fffc78ad700 (LWP 2563)):
#0  0x00007fffec21885c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007fffedb10641 in ?? () from /usr/lib/libjack.so.0
#2  0x00007fffedb09aa5 in ?? () from /usr/lib/libjack.so.0
#3  0x00007fffedb0f180 in ?? () from /usr/lib/libjack.so.0
#4  0x00007fffec2139ca in start_thread () from /lib/libpthread.so.0
#5  0x00007fffebf7070d in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 10 (Thread 0x7fffc7794700 (LWP 2559)):
#0  0x00007fffec21885c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007ffff2ef254b in g_cond_timed_wait_posix_impl (cond=0x2c86cf4, entered_mutex=0x80, abs_time=0x1) at gthread-posix.c:231
#2  0x00007fffe5608805 in gst_bus_timed_pop_filtered () from /usr/lib/libgstreamer-0.10.so.0
#3  0x00007fffe5cd047b in ?? () from /usr/lib/libcanberra.so.0
#4  0x00007fffec2139ca in start_thread () from /lib/libpthread.so.0
#5  0x00007fffebf7070d in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7fffe3404700 (LWP 2554)):
#0  0x00007fffec21885c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007ffff68fe95f in ARDOUR::Analyser::work () at ../libs/ardour/analyser.cc:85
#2  0x00007ffff68fe691 in analyser_work () at ../libs/ardour/analyser.cc:49
#3  0x00000000016cfa1f in sigc::pointer_functor0<void>::operator() (this=0x7fffdc000b18) at /usr/include/sigc++-2.0/sigc++/functors/ptr_fun.h:77
#4  0x00000000016cd2a8 in sigc::adaptor_functor<sigc::pointer_functor0<void> >::operator() (this=0x7fffdc000b10) at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#5  0x00000000016ca2cf in sigc::internal::slot_call0<sigc::pointer_functor0<void>, void>::call_it (rep=0x7fffdc000ae0) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:103
#6  0x00007ffff3577862 in ?? () from /usr/lib/libglibmm-2.4.so.1
#7  0x00007ffff2a71b84 in ?? () from /lib/libglib-2.0.so.0
#8  0x00007fffec2139ca in start_thread () from /lib/libpthread.so.0
#9  0x00007fffebf7070d in clone () from /lib/libc.so.6
#10 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7fffe3c05700 (LWP 2553)):
#0  0x00007fffec21885c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007ffff6e2ccab in peak_thread_work () at ../libs/ardour/source_factory.cc:68
#2  0x00000000016cfa1f in sigc::pointer_functor0<void>::operator() (this=0x2a91428) at /usr/include/sigc++-2.0/sigc++/functors/ptr_fun.h:77
#3  0x00000000016cd2a8 in sigc::adaptor_functor<sigc::pointer_functor0<void> >::operator() (this=0x2a91420) at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#4  0x00000000016ca2cf in sigc::internal::slot_call0<sigc::pointer_functor0<void>, void>::call_it (rep=0x2a913f0) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:103
#5  0x00007ffff3577862 in ?? () from /usr/lib/libglibmm-2.4.so.1
#6  0x00007ffff2a71b84 in ?? () from /lib/libglib-2.0.so.0
#7  0x00007fffec2139ca in start_thread () from /lib/libpthread.so.0
#8  0x00007fffebf7070d in clone () from /lib/libc.so.6
#9  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fffe4406700 (LWP 2552)):
#0  0x00007fffec21885c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007ffff6e2ccab in peak_thread_work () at ../libs/ardour/source_factory.cc:68
#2  0x00000000016cfa1f in sigc::pointer_functor0<void>::operator() (this=0x2a8ecd8) at /usr/include/sigc++-2.0/sigc++/functors/ptr_fun.h:77
---Type <return> to continue, or q <return> to quit---
#3  0x00000000016cd2a8 in sigc::adaptor_functor<sigc::pointer_functor0<void> >::operator() (this=0x2a8ecd0) at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#4  0x00000000016ca2cf in sigc::internal::slot_call0<sigc::pointer_functor0<void>, void>::call_it (rep=0x2a8eca0) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:103
#5  0x00007ffff3577862 in ?? () from /usr/lib/libglibmm-2.4.so.1
#6  0x00007ffff2a71b84 in ?? () from /lib/libglib-2.0.so.0
#7  0x00007fffec2139ca in start_thread () from /lib/libpthread.so.0
#8  0x00007fffebf7070d in clone () from /lib/libc.so.6
#9  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fffe4c07700 (LWP 2551)):
#0  0x00007fffebf3439d in nanosleep () from /lib/libc.so.6
#1  0x00007fffebf69844 in usleep () from /lib/libc.so.6
#2  0x0000000001997ce0 in gui_event_loop (ptr=0x0) at ../gtk2_ardour/linux_vst_gui_support.cc:363
#3  0x00007fffec2139ca in start_thread () from /lib/libpthread.so.0
#4  0x00007fffebf7070d in clone () from /lib/libc.so.6
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7ffff7fa0900 (LWP 2544)):
#0  0x00007fffebebda75 in raise () from /lib/libc.so.6
#1  0x00007fffebec15c0 in abort () from /lib/libc.so.6
#2  0x00007fffebeb6941 in __assert_fail () from /lib/libc.so.6
#3  0x0000000001527501 in MidiRegionView::create_note_at (this=0x5687a10, t=25323, y=132.16923076923078, length=0, sh=true, snap_x=false) at ../gtk2_ardour/midi_region_view.cc:803
#4  0x00000000012e8316 in NoteCreateDrag::finished (this=0x56f8c90, event=0x55e5e70, had_movement=true) at ../gtk2_ardour/editor_drag.cc:4453
#5  0x00000000012d01a6 in Drag::end_grab (this=0x56f8c90, event=0x55e5e70) at ../gtk2_ardour/editor_drag.cc:278
#6  0x00000000012cfb4c in DragManager::end_grab (this=0x457ea40, e=0x55e5e70) at ../gtk2_ardour/editor_drag.cc:144
#7  0x00000000015264f8 in MidiRegionView::button_release (this=0x5687a10, ev=0x55e5e70) at ../gtk2_ardour/midi_region_view.cc:512
#8  0x0000000001525d56 in MidiRegionView::canvas_event (this=0x5687a10, ev=0x55e5e70) at ../gtk2_ardour/midi_region_view.cc:349
#9  0x000000000154cae6 in sigc::bound_mem_functor1<bool, MidiRegionView, _GdkEvent*>::operator()(_GdkEvent* const&) const ()
#10 0x000000000154969d in sigc::adaptor_functor<sigc::bound_mem_functor1<bool, MidiRegionView, _GdkEvent*> >::deduce_result_type<_GdkEvent* const&, void, void, void, void, void, void>::type sigc::adaptor_functor<sigc::bound_mem_functor1<bool, MidiRegionView, _GdkEvent*> >::operator()<_GdkEvent* const&>(_GdkEvent* const&) const ()
#11 0x00000000015464c0 in sigc::internal::slot_call1<sigc::bound_mem_functor1<bool, MidiRegionView, _GdkEvent*>, bool, _GdkEvent*>::call_it (rep=0x560fcb0, a_1=@0x7fffffffd248)
    at /usr/include/sigc++-2.0/sigc++/functors/slot.h:137
#12 0x00007fffeec9bf22 in ?? () from /usr/lib/libgnomecanvasmm-2.6.so.1
#13 0x00007fffeea3f67d in gnome_canvas_marshal_BOOLEAN__BOXED (closure=0x567ee00, return_value=0x7fffffffd440, n_param_values=2, param_values=0x56fd390, 
    invocation_hint=0x7fffffffd400, marshal_data=0x0) at ../libs/gnomecanvas/libgnomecanvas/gnome-canvas-marshal.c:125
#14 0x00007ffff330755e in IA__g_closure_invoke (closure=0x567ee00, return_value=0x7fffffffd440, n_param_values=2, param_values=0x56fd390, invocation_hint=0x7fffffffd400)
    at gclosure.c:767
#15 0x00007ffff331b518 in signal_emit_unlocked_R (node=0x45717d0, detail=<value optimized out>, instance=<value optimized out>, emission_return=<value optimized out>, 
    instance_and_params=<value optimized out>) at gsignal.c:3248
#16 0x00007ffff331c839 in IA__g_signal_emit_valist (instance=0x55e6b10, signal_id=<value optimized out>, detail=0, var_args=0x7fffffffd5f0) at gsignal.c:2991
#17 0x00007ffff331cfb3 in IA__g_signal_emit (instance=0x9f0, signal_id=2544, detail=6) at gsignal.c:3038
#18 0x00007fffeea4598d in emit_event (canvas=0x2a83230, event=0x55e5ad0) at ../libs/gnomecanvas/libgnomecanvas/gnome-canvas.c:2583
#19 0x00007fffeea463bd in gnome_canvas_button (widget=0x2a83230, event=0x55e5ad0) at ../libs/gnomecanvas/libgnomecanvas/gnome-canvas.c:2798
#20 0x00007ffff252a188 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#21 0x00007ffff330755e in IA__g_closure_invoke (closure=0x28f8c70, return_value=0x7fffffffd910, n_param_values=2, param_values=0x56fd460, invocation_hint=0x7fffffffd8d0)
    at gclosure.c:767
#22 0x00007ffff331b15d in signal_emit_unlocked_R (node=0x28f8ef0, detail=<value optimized out>, instance=<value optimized out>, emission_return=<value optimized out>, 
    instance_and_params=<value optimized out>) at gsignal.c:3286
#23 0x00007ffff331c839 in IA__g_signal_emit_valist (instance=0x2a83230, signal_id=<value optimized out>, detail=0, var_args=0x7fffffffdac0) at gsignal.c:2991
#24 0x00007ffff331cfb3 in IA__g_signal_emit (instance=0x9f0, signal_id=2544, detail=6) at gsignal.c:3038
#25 0x00007ffff26410cf in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#26 0x00007ffff2522653 in gtk_propagate_event () from /usr/lib/libgtk-x11-2.0.so.0
#27 0x00007ffff252372b in gtk_main_do_event () from /usr/lib/libgtk-x11-2.0.so.0
#28 0x00007ffff219786c in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#29 0x00007ffff2a488c2 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#30 0x00007ffff2a4c748 in ?? () from /lib/libglib-2.0.so.0
#31 0x00007ffff2a4cc55 in g_main_loop_run () from /lib/libglib-2.0.so.0
#32 0x00007ffff2523bc7 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#33 0x00007ffff4fa08d5 in Gtkmm2ext::UI::run (this=0x2873910, old_receiver=...) at ../libs/gtkmm2ext/gtk_ui.cc:266
#34 0x00000000015019be in main (argc=1, argv=0x7fffffffe068) at ../gtk2_ardour/main.cc:555