Chrash log :

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1238222624 (LWP 31766)]
0x08701cc0 in Gnome::Canvas::Item::gobj (this=0xb1b8c398)
    at libs/libgnomecanvasmm/libgnomecanvasmm/item.h:100
100       GnomeCanvasItem*       gobj()       { return reinterpret_cast<GnomeCanvasItem*>(gobject_); }

Backtrace :

Thread 8 (Thread -1314382672 (LWP 31787)):
#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb67d0893 in poll () from /lib/tls/i686/cmov/libc.so.6
#2  0xb7ed6555 in ARDOUR::OSC::osc_receiver (this=0x8a78030)
    at libs/ardour/osc.cc:324
#3  0xb7ed671d in ARDOUR::OSC::_osc_receiver (arg=0x8a78030)
    at libs/ardour/osc.cc:284
#4  0xb685131b in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#5  0xb67da57e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 7 (Thread -1299354448 (LWP 31783)):
#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb67d0893 in poll () from /lib/tls/i686/cmov/libc.so.6
#2  0xb7e8f886 in ARDOUR::Session::midi_thread_work (this=0x8ee6cf0)
    at libs/ardour/session_midi.cc:1207
#3  0xb7e8fe13 in ARDOUR::Session::_midi_thread_work (arg=0x8ee6cf0)
    at libs/ardour/session_midi.cc:1128
#4  0xb685131b in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#5  0xb67da57e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 6 (Thread -1298850640 (LWP 31782)):
#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb67d0893 in poll () from /lib/tls/i686/cmov/libc.so.6
#2  0xb7e714a4 in ARDOUR::Session::butler_thread_work (this=0x8ee6cf0)
    at libs/ardour/session_butler.cc:176
#3  0xb7e72267 in ARDOUR::Session::_butler_thread_work (arg=0x8ee6cf0)
    at libs/ardour/session_butler.cc:157
#4  0xb685131b in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#5  0xb67da57e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 5 (Thread -1287652464 (LWP 31777)):
#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb67d0893 in poll () from /lib/tls/i686/cmov/libc.so.6
#2  0xb6a3ee0a in ?? () from /usr/lib/libjack-0.100.0.so.0
#3  0x08bb03f0 in ?? ()
#4  0x00000002 in ?? ()
#5  0x00000002 in ?? ()
#6  0x00000000 in ?? ()

Thread 2 (Thread -1245676368 (LWP 31774)):
#0  0xffffe410 in __kernel_vsyscall ()
#1  0xb6858986 in ?? () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb7629d72 in g_usleep () from /usr/lib/libglib-2.0.so.0
#3  0xb6d28f09 in Glib::usleep (microseconds=10000)
    at libs/glibmm2/glibmm/timer.cc:68
#4  0xb7d4b6aa in ARDOUR::AudioEngine::meter_thread (this=0x8bb05d8)
    at libs/ardour/audioengine.cc:412
#5  0xb7d4e2c0 in sigc::bound_mem_functor0<void, ARDOUR::AudioEngine>::operator() (this=0x8bb0524) at libs/sigc++2/sigc++/functors/mem_fun.h:1781
#6  0xb7d4e2e2 in sigc::adaptor_functor<sigc::bound_mem_functor0<void, ARDOUR::AudioEngine> >::operator() (this=0x8bb0520)
    at libs/sigc++2/sigc++/adaptors/adaptor_trait.h:251
#7  0xb7d4e30e in sigc::internal::slot_call0<sigc::bound_mem_functor0<void, ARDOUR::AudioEngine>, void>::call_it (rep=0x8bb0508)
    at libs/sigc++2/sigc++/functors/slot.h:103
#8  0x08397bde in sigc::slot0<void>::operator() (this=0x8b10d18)
    at libs/sigc++2/sigc++/functors/slot.h:440
#9  0xb6d16b7f in call_thread_entry_slot (data=0x8b10d18)
    at libs/glibmm2/glibmm/thread.cc:43
#10 0xb7627b7f in ?? () from /usr/lib/libglib-2.0.so.0
#11 0x08b10d18 in ?? ()
#12 0x08bafd88 in ?? ()
#13 0xb684c000 in ?? ()
#14 0x00014084 in ?? ()
#15 0xb6712a18 in ?? () from /lib/tls/i686/cmov/libc.so.6
#16 0xb685fff4 in ?? () from /lib/tls/i686/cmov/libpthread.so.0
#17 0xb6853440 in ?? () from /lib/tls/i686/cmov/libpthread.so.0
#18 0xb685fff4 in ?? () from /lib/tls/i686/cmov/libpthread.so.0
#19 0x00000000 in ?? ()

Thread 1 (Thread -1238222624 (LWP 31766)):
#0  0x08701cc0 in Gnome::Canvas::Item::gobj (this=0xb1b8c398)
    at libs/libgnomecanvasmm/libgnomecanvasmm/item.h:100
#1  0xb6f43bb5 in Gnome::Canvas::Item::ungrab (this=0xb1b8c398, 
    etime=162942865) at libs/libgnomecanvasmm/libgnomecanvasmm/item.cc:692
#2  0x0851ac79 in Editor::end_grab (this=0x8cf6900, item=0xb1b8c398, 
    event=0x90e2ed0) at gtk2_ardour/editor_mouse.cc:1626
#3  0x084f5ee4 in Editor::track_canvas_button_release_event (this=0x8cf6900, 
    event=0x90e2ed0) at gtk2_ardour/editor_canvas_events.cc:152
#4  0x084b0ed5 in sigc::bound_mem_functor1<bool, Editor, _GdkEventButton*>::operator() (this=0x8c47e0c, _A_a1=@0xbfa91834)
    at libs/sigc++2/sigc++/functors/mem_fun.h:1838
#5  0x084b0ef5 in sigc::adaptor_functor<sigc::bound_mem_functor1<bool, Editor, _GdkEventButton*> >::operator()<_GdkEventButton* const&> (this=0x8c47e08, 
    _A_arg1=@0xbfa91834) at libs/sigc++2/sigc++/adaptors/adaptor_trait.h:84
#6  0x084b0f1b in sigc::internal::slot_call1<sigc::bound_mem_functor1<bool, Editor, _GdkEventButton*>, bool, _GdkEventButton*>::call_it (rep=0x8c47df0, 
    a_1=@0xbfa91834) at libs/sigc++2/sigc++/functors/slot.h:137
#7  0xb79155e1 in sigc::slot1<bool, _GdkEventButton*>::operator() (
    this=0x8c47f0c, _A_a1=@0xbfa91834)
    at libs/sigc++2/sigc++/functors/slot.h:512
#8  0xb7911c78 in (anonymous namespace)::Widget_signal_button_release_event_callback (self=0x8d38070, p0=0x90e2ed0, data=0x8c47f08)
    at libs/gtkmm2/gtk/gtkmm/widget.cc:1125
#9  0xb735e6b0 in _gtk_marshal_BOOLEAN__BOXED ()
   from /usr/lib/libgtk-x11-2.0.so.0
#10 0xb769162b in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
#11 0xb76a23f1 in ?? () from /usr/lib/libgobject-2.0.so.0
#12 0x08c47f38 in ?? ()
#13 0xbfa91980 in ?? ()
#14 0x00000002 in ?? ()
#15 0xbfa9196c in ?? ()
#16 0x00000004 in ?? ()
#17 0x08d38070 in ?? ()
#18 0x00000000 in ?? ()