Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1238092096 (LWP 24085)]
0xb7e2b0db in ARDOUR::Session::get_silent_buffers (this=0x90b9800, howmany=3)
    at libs/ardour/session.cc:4010
4010                    memset (_silent_buffers[i], 0, sizeof (Sample) * current_block_size);
(gdb) bt
#0  0xb7e2b0db in ARDOUR::Session::get_silent_buffers (this=0x90b9800, 
    howmany=3) at libs/ardour/session.cc:4010
#1  0xb7d3026b in ARDOUR::AudioTrack::passthru_silence (this=0x90e4ff0, 
    start_frame=0, end_frame=1024, nframes=1024, offset=0, declick=0, 
    meter=false) at libs/ardour/audio_track.cc:444
#2  0xb7d2fbb8 in ARDOUR::AudioTrack::no_roll (this=0x90e4ff0, nframes=1024, 
    start_frame=0, end_frame=1024, offset=0, session_state_changing=false, 
    can_record=false, rec_monitors_input=false)
    at libs/ardour/audio_track.cc:513
#3  0xb7e8d033 in ARDOUR::Session::no_roll (this=0x90b9800, nframes=1024, 
    offset=0) at libs/ardour/session_process.cc:101
#4  0xb7e8de56 in ARDOUR::Session::process_without_events (this=0x90b9800, 
    nframes=1024) at libs/ardour/session_process.cc:741
#5  0xb7e8e251 in ARDOUR::Session::process_with_events (this=0x90b9800, 
    nframes=1024) at libs/ardour/session_process.cc:286
#6  0xb7e8e8d0 in ARDOUR::Session::process (this=0x90b9800, nframes=1024)
    at libs/ardour/session_process.cc:60
#7  0xb7d39033 in ARDOUR::AudioEngine::set_session (this=0x8cc1948, 
    s=0x90b9800) at libs/ardour/audioengine.cc:436
#8  0xb7e3b6fa in ARDOUR::Session::when_engine_running (this=0x90b9800)
    at libs/ardour/session.cc:875
#9  0xb7ea006b in ARDOUR::Session::second_stage_init (this=0x90b9800, 
    new_session=false) at libs/ardour/session_state.cc:320
---Type <return> to continue, or q <return> to quit---
#10 0xb7e4294e in Session (this=0x90b9800, eng=@0x8cc1948, 
    fullpath=@0xbfba1f74, snapshot_name=@0xbfba1f78, mix_template=0x0)
    at libs/ardour/session.cc:300
#11 0x083ab27d in ARDOUR_UI::load_session (this=0x88bdcd0, path=@0xbfba2038, 
    snap_name=@0xbfba203c, mix_template=0x0) at gtk2_ardour/ardour_ui.cc:2282
#12 0x083b9385 in ARDOUR_UI::get_session_parameters (this=0x88bdcd0, 
    predetermined_path=@0xbfba2110, have_engine=true, should_be_new=false)
    at gtk2_ardour/ardour_ui.cc:2065
#13 0x083ba4d1 in ARDOUR_UI::startup (this=0x88bdcd0)
    at gtk2_ardour/ardour_ui.cc:644
#14 0x083c31a4 in sigc::bound_mem_functor0<void, ARDOUR_UI>::operator() (
    this=0x8c8a23c) at libs/sigc++2/sigc++/functors/mem_fun.h:1781
#15 0x083c31ba in sigc::adaptor_functor<sigc::bound_mem_functor0<void, ARDOUR_UI> >::operator() (this=0x8c8a238)
    at libs/sigc++2/sigc++/adaptors/adaptor_trait.h:251
#16 0x083c31d6 in sigc::internal::slot_call0<sigc::bound_mem_functor0<void, ARDOUR_UI>, void>::call_it (rep=0x8c8a220)
    at libs/sigc++2/sigc++/functors/slot.h:103
#17 0x083c4de9 in sigc::internal::signal_emit0<void, sigc::nil_>::emit (
    impl=0x8c8a578) at libs/sigc++2/sigc++/signal.h:517
#18 0x083c4e84 in sigc::signal0<void, sigc::nil_>::emit (this=0x88bdd18)
    at libs/sigc++2/sigc++/signal.h:1584
#19 0x083c4e97 in sigc::signal0<void, sigc::nil_>::operator() (this=0x88bdd18)
---Type <return> to continue, or q <return> to quit---
    at libs/sigc++2/sigc++/signal.h:1588
#20 0xb7af9809 in Gtkmm2ext::UI::run (this=0x88bdcd0, old_receiver=@0x88998a8)
    at libs/gtkmm2ext/gtk_ui.cc:221
#21 0x0860c995 in main (argc=1, argv=0xbfba2314) at gtk2_ardour/main.cc:266
(gdb) p i
$1 = 2
(gdb) p _silent_buffers
$2 = {<std::_Vector_base<ARDOUR::Sample*,std::allocator<ARDOUR::Sample*> >> = {
    _M_impl = {<std::allocator<ARDOUR::Sample*>> = {<__gnu_cxx::new_allocator<ARDOUR::Sample*>> = {<No data fields>}, <No data fields>}, _M_start = 0x91f88e8, 
      _M_finish = 0x91f88f0, _M_end_of_storage = 0x91f88f0}}, <No data fields>}
(gdb) p _silent_buffers[2]
$3 = (Sample *&) @0x91f88f0: 0x10
(gdb) p current_block_size
$4 = 1024