[Thread 0x7fff87fff700 (LWP 23607) exited]
[Thread 0x7fff9c9a0700 (LWP 23606) exited]
[Thread 0x7fffd8870700 (LWP 23604) exited]
------------------ summary move drag starts.

[Thread 0x7fff9d1a1700 (LWP 23605) exited]
ardour-4.2.634: ../libs/canvas/wave_view.cc:1540: static void ArdourCanvas::WaveView::drawing_thread(): Assertion `(__extension__ ({ typedef char _GStaticAssertCompileTimeAssertion_67[(sizeof *(&drawing_thread_should_quit) == sizeof (gint)) ? 1 : -1] __attribute__((__unused__)); (void) (0 ? *(&drawing_thread_should_quit) ^ *(&drawing_thread_should_quit) : 0); __sync_synchronize (); (gint) *(&drawing_thread_should_quit); }))' failed.

Program received signal SIGABRT, Aborted.
[Switching to Thread 0x7fff877fe700 (LWP 23609)]
0x00007fffed236cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
56	../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) thread apply all bt

Thread 34 (Thread 0x7fff877fe700 (LWP 23609)):
#0  0x00007fffed236cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1  0x00007fffed23a0d8 in __GI_abort () at abort.c:89
#2  0x00007fffed22fb86 in __assert_fail_base (fmt=0x7fffed380830 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", 
    assertion=assertion@entry=0x7ffff79597d0 "(__extension__ ({ typedef char _GStaticAssertCompileTimeAssertion_67[(sizeof *(&drawing_thread_should_quit) == sizeof (gint)) ? 1 : -1] __attribute__((__unused__)); (void) (0 ? *(&drawing_thread_shoul"..., file=file@entry=0x7ffff7959475 "../libs/canvas/wave_view.cc", line=line@entry=1540, 
    function=function@entry=0x7ffff7959dc0 <ArdourCanvas::WaveView::drawing_thread()::__PRETTY_FUNCTION__> "static void ArdourCanvas::WaveView::drawing_thread()") at assert.c:92
#3  0x00007fffed22fc32 in __GI___assert_fail (
    assertion=0x7ffff79597d0 "(__extension__ ({ typedef char _GStaticAssertCompileTimeAssertion_67[(sizeof *(&drawing_thread_should_quit) == sizeof (gint)) ? 1 : -1] __attribute__((__unused__)); (void) (0 ? *(&drawing_thread_shoul"..., file=0x7ffff7959475 "../libs/canvas/wave_view.cc", line=1540, 
    function=0x7ffff7959dc0 <ArdourCanvas::WaveView::drawing_thread()::__PRETTY_FUNCTION__> "static void ArdourCanvas::WaveView::drawing_thread()") at assert.c:101
#4  0x00007ffff794504f in ArdourCanvas::WaveView::drawing_thread () at ../libs/canvas/wave_view.cc:1540
#5  0x0000000000cb0f77 in sigc::pointer_functor0<void>::operator() (this=0x7dcc7a8)
    at /home/ardour/linux-x86_64/gtk/inst/include/sigc++-2.0/sigc++/functors/ptr_fun.h:77
#6  0x0000000000cae5c0 in sigc::adaptor_functor<sigc::pointer_functor0<void> >::operator() (this=0x7dcc7a0)
---Type <return> to continue, or q <return> to quit---
    at /home/ardour/linux-x86_64/gtk/inst/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#7  0x0000000000caadd5 in sigc::internal::slot_call0<sigc::pointer_functor0<void>, void>::call_it (rep=0x7dcc770)
    at /home/ardour/linux-x86_64/gtk/inst/include/sigc++-2.0/sigc++/functors/slot.h:103
#8  0x00007ffff49e5b72 in ?? () from /opt/Ardour-4.2.634-dbg/lib/libglibmm-2.4.so.1
#9  0x00007ffff44867f5 in ?? () from /opt/Ardour-4.2.634-dbg/lib/libglib-2.0.so.0
#10 0x00007ffff026d182 in start_thread (arg=0x7fff877fe700) at pthread_create.c:312
#11 0x00007fffed2fa47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 29 (Thread 0x7fffb9bf1700 (LWP 23603)):
#0  0x00007ffff0274b9d in nanosleep () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ffff4488298 in g_usleep () from /opt/Ardour-4.2.634-dbg/lib/libglib-2.0.so.0
#2  0x00007ffff688774e in ARDOUR::AutomationWatch::thread (this=0x8280150)
    at ../libs/ardour/automation_watch.cc:153
#3  0x00007ffff688abc9 in boost::_mfi::mf0<void, ARDOUR::AutomationWatch>::operator() (this=0x40c49f0, 
    p=0x8280150) at /home/ardour/linux-x86_64/gtk/inst/include/boost/bind/mem_fn_template.hpp:49
#4  0x00007ffff688a80c in boost::_bi::list1<boost::_bi::value<ARDOUR::AutomationWatch*> >::operator()<boost::_mfi::mf0<void, ARDOUR::AutomationWatch>, boost::_bi::list0> (this=0x40c4a00, f=..., a=...)
    at /home/ardour/linux-x86_64/gtk/inst/include/boost/bind/bind.hpp:253
#5  0x00007ffff688a407 in boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AutomationWatch>, boost::_bi::list1<boost::_bi::value<ARDOUR::AutomationWatch*> > >::operator() (this=0x40c49f0)
---Type <return> to continue, or q <return> to quit---
    at /home/ardour/linux-x86_64/gtk/inst/include/boost/bind/bind_template.hpp:20
#6  0x00007ffff688a392 in sigc::adaptor_functor<boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AutomationWatch>, boost::_bi::list1<boost::_bi::value<ARDOUR::AutomationWatch*> > > >::operator() (this=0x40c49f0)
    at /home/ardour/linux-x86_64/gtk/inst/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#7  0x00007ffff6889f92 in sigc::internal::slot_call0<boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AutomationWatch>, boost::_bi::list1<boost::_bi::value<ARDOUR::AutomationWatch*> > >, void>::call_it (rep=0x40c49c0)
    at /home/ardour/linux-x86_64/gtk/inst/include/sigc++-2.0/sigc++/functors/slot.h:103
#8  0x00007ffff49e5b72 in ?? () from /opt/Ardour-4.2.634-dbg/lib/libglibmm-2.4.so.1
#9  0x00007ffff44867f5 in ?? () from /opt/Ardour-4.2.634-dbg/lib/libglib-2.0.so.0
#10 0x00007ffff026d182 in start_thread (arg=0x7fffb9bf1700) at pthread_create.c:312
#11 0x00007fffed2fa47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 28 (Thread 0x7fffd9872700 (LWP 23602)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffff6c5fb0c in ARDOUR::Session::emit_thread_run (this=0x2668710)
    at ../libs/ardour/session_process.cc:1313
#2  0x00007ffff6c5fab6 in ARDOUR::Session::emit_thread (arg=0x2668710) at ../libs/ardour/session_process.cc:1302
#3  0x00007ffff026d182 in start_thread (arg=0x7fffd9872700) at pthread_create.c:312
#4  0x00007fffed2fa47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

---Type <return> to continue, or q <return> to quit---
Thread 27 (Thread 0x7fffd9071700 (LWP 23597)):
#0  0x00007fffed2ed12d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ffff445baa5 in ?? () from /opt/Ardour-4.2.634-dbg/lib/libglib-2.0.so.0
#2  0x00007ffff445bbb5 in g_main_loop_run () from /opt/Ardour-4.2.634-dbg/lib/libglib-2.0.so.0
#3  0x00007ffff55d0979 in BaseUI::main_thread (this=0x3cccdf0) at ../libs/pbd/base_ui.cc:86
#4  0x00007ffff55d459b in sigc::bound_mem_functor0<void, BaseUI>::operator() (this=0x3ccd5e8)
    at /home/ardour/linux-x86_64/gtk/inst/include/sigc++-2.0/sigc++/functors/mem_fun.h:1787
#5  0x00007ffff55d42dc in sigc::adaptor_functor<sigc::bound_mem_functor0<void, BaseUI> >::operator() (
    this=0x3ccd5e0) at /home/ardour/linux-x86_64/gtk/inst/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#6  0x00007ffff55d3df5 in sigc::internal::slot_call0<sigc::bound_mem_functor0<void, BaseUI>, void>::call_it (
    rep=0x3ccd5b0) at /home/ardour/linux-x86_64/gtk/inst/include/sigc++-2.0/sigc++/functors/slot.h:103
#7  0x00007ffff49e5b72 in ?? () from /opt/Ardour-4.2.634-dbg/lib/libglibmm-2.4.so.1
#8  0x00007ffff44867f5 in ?? () from /opt/Ardour-4.2.634-dbg/lib/libglib-2.0.so.0
#9  0x00007ffff026d182 in start_thread (arg=0x7fffd9071700) at pthread_create.c:312
#10 0x00007fffed2fa47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 26 (Thread 0x7fffd9f70800 (LWP 23596)):
#0  0x00007fffed2ed12d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ffff55e73c1 in CrossThreadChannel::poll_for_request (this=0x266e6d0)
    at ../libs/pbd/crossthread.posix.cc:80
---Type <return> to continue, or q <return> to quit---
#2  0x00007ffff55e7429 in CrossThreadChannel::receive (this=0x266e6d0, msg=@0x7fffd9f6f87f: 0 '\000', wait=true)
    at ../libs/pbd/crossthread.posix.cc:101
#3  0x00007ffff689c1f6 in ARDOUR::Butler::thread_work (this=0x266e640) at ../libs/ardour/butler.cc:175
#4  0x00007ffff689be99 in ARDOUR::Butler::_thread_work (arg=0x266e640) at ../libs/ardour/butler.cc:156
#5  0x00007ffff55fff7a in fake_thread_start (arg=0x3cccc20) at ../libs/pbd/pthread_utils.cc:93
#6  0x00007ffff026d182 in start_thread (arg=0x7fffd9f70800) at pthread_create.c:312
#7  0x00007fffed2fa47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 25 (Thread 0x7fffd9ff2700 (LWP 23594)):
#0  sem_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/sem_wait.S:85
#1  0x00007ffff699266a in PBD::ProcessSemaphore::wait (this=0x39311c0)
    at /home/ardour/linux-x86_64/ardour/libs/pbd/pbd/semutils.h:56
#2  0x00007ffff69905e0 in ARDOUR::Graph::run_one (this=0x3931110) at ../libs/ardour/graph.cc:387
#3  0x00007ffff6990982 in ARDOUR::Graph::helper_thread (this=0x3931110) at ../libs/ardour/graph.cc:418
#4  0x00007ffff6996b4d in boost::_mfi::mf0<void, ARDOUR::Graph>::operator() (this=0x7fffd9ff1d18, p=0x3931110)
    at /home/ardour/linux-x86_64/gtk/inst/include/boost/bind/mem_fn_template.hpp:49
#5  0x00007ffff6996362 in boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> >::operator()<boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list0> (this=0x7fffd9ff1d28, f=..., a=...)
    at /home/ardour/linux-x86_64/gtk/inst/include/boost/bind/bind.hpp:253
#6  0x00007ffff6995981 in boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list1<boost::---Type <return> to continue, or q <return> to quit---
_bi::value<ARDOUR::Graph*> > >::operator() (this=0x7fffd9ff1d18)
    at /home/ardour/linux-x86_64/gtk/inst/include/boost/bind/bind_template.hpp:20
#7  0x00007ffff6995377 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 /home/ardour/linux-x86_64/gtk/inst/include/boost/function/function_template.hpp:153
#8  0x00000000005e6151 in boost::function0<void>::operator() (this=0x7fffd9ff1d10)
    at /home/ardour/linux-x86_64/gtk/inst/include/boost/function/function_template.hpp:760
#9  0x00007fffe173a94b in ARDOUR::JACKAudioBackend::_start_process_thread (arg=0x3930ee0)
    at ../libs/backends/jack/jack_audiobackend.cc:908
#10 0x00007ffff026d182 in start_thread (arg=0x7fffd9ff2700) at pthread_create.c:312
#11 0x00007fffed2fa47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 24 (Thread 0x7fffda073700 (LWP 23593)):
#0  sem_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/sem_wait.S:85
#1  0x00007ffff699266a in PBD::ProcessSemaphore::wait (this=0x39311e0)
    at /home/ardour/linux-x86_64/ardour/libs/pbd/pbd/semutils.h:56
#2  0x00007ffff698f93d in ARDOUR::Graph::restart_cycle (this=0x3931110) at ../libs/ardour/graph.cc:261
#3  0x00007ffff698f907 in ARDOUR::Graph::dec_ref (this=0x3931110) at ../libs/ardour/graph.cc:248
#4  0x00007ffff69977c0 in ARDOUR::GraphNode::finish (this=0x3a9b4c0, chain=1) at ../libs/ardour/graphnode.cc:71
#5  0x00007ffff69907da in ARDOUR::Graph::run_one (this=0x3931110) at ../libs/ardour/graph.cc:401
---Type <return> to continue, or q <return> to quit---
#6  0x00007ffff6990982 in ARDOUR::Graph::helper_thread (this=0x3931110) at ../libs/ardour/graph.cc:418
#7  0x00007ffff6996b4d in boost::_mfi::mf0<void, ARDOUR::Graph>::operator() (this=0x7fffda072d18, p=0x3931110)
    at /home/ardour/linux-x86_64/gtk/inst/include/boost/bind/mem_fn_template.hpp:49
#8  0x00007ffff6996362 in boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> >::operator()<boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list0> (this=0x7fffda072d28, f=..., a=...)
    at /home/ardour/linux-x86_64/gtk/inst/include/boost/bind/bind.hpp:253
#9  0x00007ffff6995981 in boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> > >::operator() (this=0x7fffda072d18)
    at /home/ardour/linux-x86_64/gtk/inst/include/boost/bind/bind_template.hpp:20
#10 0x00007ffff6995377 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 /home/ardour/linux-x86_64/gtk/inst/include/boost/function/function_template.hpp:153
#11 0x00000000005e6151 in boost::function0<void>::operator() (this=0x7fffda072d10)
    at /home/ardour/linux-x86_64/gtk/inst/include/boost/function/function_template.hpp:760
#12 0x00007fffe173a94b in ARDOUR::JACKAudioBackend::_start_process_thread (arg=0x3930ee0)
    at ../libs/backends/jack/jack_audiobackend.cc:908
#13 0x00007ffff026d182 in start_thread (arg=0x7fffda073700) at pthread_create.c:312
#14 0x00007fffed2fa47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 23 (Thread 0x7fffdbc07700 (LWP 23592)):
---Type <return> to continue, or q <return> to quit---
#0  sem_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/sem_wait.S:85
#1  0x00007ffff699266a in PBD::ProcessSemaphore::wait (this=0x39311c0)
    at /home/ardour/linux-x86_64/ardour/libs/pbd/pbd/semutils.h:56
#2  0x00007ffff69905e0 in ARDOUR::Graph::run_one (this=0x3931110) at ../libs/ardour/graph.cc:387
#3  0x00007ffff6990d43 in ARDOUR::Graph::main_thread (this=0x3931110) at ../libs/ardour/graph.cc:456
#4  0x00007ffff6996b4d in boost::_mfi::mf0<void, ARDOUR::Graph>::operator() (this=0x7fffdbc06d18, p=0x3931110)
    at /home/ardour/linux-x86_64/gtk/inst/include/boost/bind/mem_fn_template.hpp:49
#5  0x00007ffff6996362 in boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> >::operator()<boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list0> (this=0x7fffdbc06d28, f=..., a=...)
    at /home/ardour/linux-x86_64/gtk/inst/include/boost/bind/bind.hpp:253
#6  0x00007ffff6995981 in boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> > >::operator() (this=0x7fffdbc06d18)
    at /home/ardour/linux-x86_64/gtk/inst/include/boost/bind/bind_template.hpp:20
#7  0x00007ffff6995377 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 /home/ardour/linux-x86_64/gtk/inst/include/boost/function/function_template.hpp:153
#8  0x00000000005e6151 in boost::function0<void>::operator() (this=0x7fffdbc06d10)
    at /home/ardour/linux-x86_64/gtk/inst/include/boost/function/function_template.hpp:760
#9  0x00007fffe173a94b in ARDOUR::JACKAudioBackend::_start_process_thread (arg=0x3930ee0)
    at ../libs/backends/jack/jack_audiobackend.cc:908
---Type <return> to continue, or q <return> to quit---
#10 0x00007ffff026d182 in start_thread (arg=0x7fffdbc07700) at pthread_create.c:312
#11 0x00007fffed2fa47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 21 (Thread 0x7fffdbc88700 (LWP 23587)):
#0  sem_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S:101
#1  0x00007fffe0fd7a1c in ?? () from /usr/lib/x86_64-linux-gnu/libjack.so.0
#2  0x00007fffe0fbc0cc in ?? () from /usr/lib/x86_64-linux-gnu/libjack.so.0
#3  0x00007fffe0fbaa17 in ?? () from /usr/lib/x86_64-linux-gnu/libjack.so.0
#4  0x00007fffe1757764 in WJACK_cycle_wait (client=0x1a83270) at ../libs/backends/jack/weak_libjack.def:78
#5  0x00007fffe173aa00 in ARDOUR::JACKAudioBackend::process_thread (this=0x1b1d1d0)
    at ../libs/backends/jack/jack_audiobackend.cc:937
#6  0x00007fffe173a9a0 in ARDOUR::JACKAudioBackend::_process_thread (arg=0x1b1d1d0)
    at ../libs/backends/jack/jack_audiobackend.cc:916
#7  0x00007fffe0fba98a in ?? () from /usr/lib/x86_64-linux-gnu/libjack.so.0
#8  0x00007fffe0fd6c40 in ?? () from /usr/lib/x86_64-linux-gnu/libjack.so.0
#9  0x00007ffff026d182 in start_thread (arg=0x7fffdbc88700) at pthread_create.c:312
#10 0x00007fffed2fa47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 20 (Thread 0x7fffdbdf9700 (LWP 23586)):
#0  0x00007ffff02743bd in read () at ../sysdeps/unix/syscall-template.S:81
---Type <return> to continue, or q <return> to quit---
#1  0x00007fffe0fd8854 in ?? () from /usr/lib/x86_64-linux-gnu/libjack.so.0
#2  0x00007fffe0fdb4ac in ?? () from /usr/lib/x86_64-linux-gnu/libjack.so.0
#3  0x00007fffe0fd6c40 in ?? () from /usr/lib/x86_64-linux-gnu/libjack.so.0
#4  0x00007ffff026d182 in start_thread (arg=0x7fffdbdf9700) at pthread_create.c:312
#5  0x00007fffed2fa47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 19 (Thread 0x7fffe00c5700 (LWP 23585)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fffe0fd804c in ?? () from /usr/lib/x86_64-linux-gnu/libjack.so.0
#2  0x00007fffe0fced88 in ?? () from /usr/lib/x86_64-linux-gnu/libjack.so.0
#3  0x00007fffe0fd6c40 in ?? () from /usr/lib/x86_64-linux-gnu/libjack.so.0
#4  0x00007ffff026d182 in start_thread (arg=0x7fffe00c5700) at pthread_create.c:312
#5  0x00007fffed2fa47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 13 (Thread 0x7fffdae91700 (LWP 23576)):
#0  0x00007fffed2ed12d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ffff445baa5 in ?? () from /opt/Ardour-4.2.634-dbg/lib/libglib-2.0.so.0
#2  0x00007ffff445bcc7 in g_main_context_iteration () from /opt/Ardour-4.2.634-dbg/lib/libglib-2.0.so.0
#3  0x00007ffff445bd19 in ?? () from /opt/Ardour-4.2.634-dbg/lib/libglib-2.0.so.0
#4  0x00007ffff44867f5 in ?? () from /opt/Ardour-4.2.634-dbg/lib/libglib-2.0.so.0
---Type <return> to continue, or q <return> to quit---
#5  0x00007ffff026d182 in start_thread (arg=0x7fffdae91700) at pthread_create.c:312
#6  0x00007fffed2fa47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 7 (Thread 0x7fffe2173700 (LWP 23570)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffff44a7524 in g_cond_wait () from /opt/Ardour-4.2.634-dbg/lib/libglib-2.0.so.0
#2  0x00007ffff682bcbd in ARDOUR::AudioEngine::do_devicelist_update (this=0x19b0300)
    at ../libs/ardour/audioengine.cc:537
#3  0x00007ffff68390ad in boost::_mfi::mf0<void, ARDOUR::AudioEngine>::operator() (this=0x1844e10, p=0x19b0300)
    at /home/ardour/linux-x86_64/gtk/inst/include/boost/bind/mem_fn_template.hpp:49
#4  0x00007ffff6838cbc in boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> >::operator()<boost::_mfi::mf0<void, ARDOUR::AudioEngine>, boost::_bi::list0> (this=0x1844e20, f=..., a=...)
    at /home/ardour/linux-x86_64/gtk/inst/include/boost/bind/bind.hpp:253
#5  0x00007ffff68385bd in boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AudioEngine>, boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> > >::operator() (this=0x1844e10)
    at /home/ardour/linux-x86_64/gtk/inst/include/boost/bind/bind_template.hpp:20
#6  0x00007ffff6837daa 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=0x1844e10)
    at /home/ardour/linux-x86_64/gtk/inst/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#7  0x00007ffff6836fd2 in sigc::internal::slot_call0<boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AudioE---Type <return> to continue, or q <return> to quit---
ngine>, boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> > >, void>::call_it (rep=0x1844de0)
    at /home/ardour/linux-x86_64/gtk/inst/include/sigc++-2.0/sigc++/functors/slot.h:103
#8  0x00007ffff49e5b72 in ?? () from /opt/Ardour-4.2.634-dbg/lib/libglibmm-2.4.so.1
#9  0x00007ffff44867f5 in ?? () from /opt/Ardour-4.2.634-dbg/lib/libglib-2.0.so.0
#10 0x00007ffff026d182 in start_thread (arg=0x7fffe2173700) at pthread_create.c:312
#11 0x00007fffed2fa47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 6 (Thread 0x7fffe2974700 (LWP 23569)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffff44a7524 in g_cond_wait () from /opt/Ardour-4.2.634-dbg/lib/libglib-2.0.so.0
#2  0x00007ffff682ba77 in ARDOUR::AudioEngine::do_reset_backend (this=0x19b0300)
    at ../libs/ardour/audioengine.cc:502
#3  0x00007ffff68390ad in boost::_mfi::mf0<void, ARDOUR::AudioEngine>::operator() (this=0x17e76e0, p=0x19b0300)
    at /home/ardour/linux-x86_64/gtk/inst/include/boost/bind/mem_fn_template.hpp:49
#4  0x00007ffff6838cbc in boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> >::operator()<boost::_mfi::mf0<void, ARDOUR::AudioEngine>, boost::_bi::list0> (this=0x17e76f0, f=..., a=...)
    at /home/ardour/linux-x86_64/gtk/inst/include/boost/bind/bind.hpp:253
#5  0x00007ffff68385bd in boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AudioEngine>, boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> > >::operator() (this=0x17e76e0)
    at /home/ardour/linux-x86_64/gtk/inst/include/boost/bind/bind_template.hpp:20
---Type <return> to continue, or q <return> to quit---
#6  0x00007ffff6837daa 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=0x17e76e0)
    at /home/ardour/linux-x86_64/gtk/inst/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#7  0x00007ffff6836fd2 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=0x17e76b0)
    at /home/ardour/linux-x86_64/gtk/inst/include/sigc++-2.0/sigc++/functors/slot.h:103
#8  0x00007ffff49e5b72 in ?? () from /opt/Ardour-4.2.634-dbg/lib/libglibmm-2.4.so.1
#9  0x00007ffff44867f5 in ?? () from /opt/Ardour-4.2.634-dbg/lib/libglib-2.0.so.0
#10 0x00007ffff026d182 in start_thread (arg=0x7fffe2974700) at pthread_create.c:312
#11 0x00007fffed2fa47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 5 (Thread 0x7fffe37fe700 (LWP 23568)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffff44a7524 in g_cond_wait () from /opt/Ardour-4.2.634-dbg/lib/libglib-2.0.so.0
#2  0x00007ffff67d3853 in ARDOUR::Analyser::work () at ../libs/ardour/analyser.cc:85
#3  0x00007ffff67d35e9 in analyser_work () at ../libs/ardour/analyser.cc:50
#4  0x0000000000cb0f77 in sigc::pointer_functor0<void>::operator() (this=0x17ba988)
    at /home/ardour/linux-x86_64/gtk/inst/include/sigc++-2.0/sigc++/functors/ptr_fun.h:77
#5  0x0000000000cae5c0 in sigc::adaptor_functor<sigc::pointer_functor0<void> >::operator() (this=0x17ba980)
    at /home/ardour/linux-x86_64/gtk/inst/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
---Type <return> to continue, or q <return> to quit---
#6  0x0000000000caadd5 in sigc::internal::slot_call0<sigc::pointer_functor0<void>, void>::call_it (rep=0x17ba950)
    at /home/ardour/linux-x86_64/gtk/inst/include/sigc++-2.0/sigc++/functors/slot.h:103
#7  0x00007ffff49e5b72 in ?? () from /opt/Ardour-4.2.634-dbg/lib/libglibmm-2.4.so.1
#8  0x00007ffff44867f5 in ?? () from /opt/Ardour-4.2.634-dbg/lib/libglib-2.0.so.0
#9  0x00007ffff026d182 in start_thread (arg=0x7fffe37fe700) at pthread_create.c:312
#10 0x00007fffed2fa47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7fffe3fff700 (LWP 23567)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffff44a7524 in g_cond_wait () from /opt/Ardour-4.2.634-dbg/lib/libglib-2.0.so.0
#2  0x00007ffff6ccf059 in peak_thread_work () at ../libs/ardour/source_factory.cc:71
#3  0x0000000000cb0f77 in sigc::pointer_functor0<void>::operator() (this=0x17b9b08)
    at /home/ardour/linux-x86_64/gtk/inst/include/sigc++-2.0/sigc++/functors/ptr_fun.h:77
#4  0x0000000000cae5c0 in sigc::adaptor_functor<sigc::pointer_functor0<void> >::operator() (this=0x17b9b00)
    at /home/ardour/linux-x86_64/gtk/inst/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#5  0x0000000000caadd5 in sigc::internal::slot_call0<sigc::pointer_functor0<void>, void>::call_it (rep=0x17b9ad0)
    at /home/ardour/linux-x86_64/gtk/inst/include/sigc++-2.0/sigc++/functors/slot.h:103
#6  0x00007ffff49e5b72 in ?? () from /opt/Ardour-4.2.634-dbg/lib/libglibmm-2.4.so.1
#7  0x00007ffff44867f5 in ?? () from /opt/Ardour-4.2.634-dbg/lib/libglib-2.0.so.0
#8  0x00007ffff026d182 in start_thread (arg=0x7fffe3fff700) at pthread_create.c:312
---Type <return> to continue, or q <return> to quit---
#9  0x00007fffed2fa47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7fffe8aac700 (LWP 23566)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007ffff44a7524 in g_cond_wait () from /opt/Ardour-4.2.634-dbg/lib/libglib-2.0.so.0
#2  0x00007ffff6ccf059 in peak_thread_work () at ../libs/ardour/source_factory.cc:71
#3  0x0000000000cb0f77 in sigc::pointer_functor0<void>::operator() (this=0x181f878)
    at /home/ardour/linux-x86_64/gtk/inst/include/sigc++-2.0/sigc++/functors/ptr_fun.h:77
#4  0x0000000000cae5c0 in sigc::adaptor_functor<sigc::pointer_functor0<void> >::operator() (this=0x181f870)
    at /home/ardour/linux-x86_64/gtk/inst/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#5  0x0000000000caadd5 in sigc::internal::slot_call0<sigc::pointer_functor0<void>, void>::call_it (rep=0x181f840)
    at /home/ardour/linux-x86_64/gtk/inst/include/sigc++-2.0/sigc++/functors/slot.h:103
#6  0x00007ffff49e5b72 in ?? () from /opt/Ardour-4.2.634-dbg/lib/libglibmm-2.4.so.1
#7  0x00007ffff44867f5 in ?? () from /opt/Ardour-4.2.634-dbg/lib/libglib-2.0.so.0
#8  0x00007ffff026d182 in start_thread (arg=0x7fffe8aac700) at pthread_create.c:312
#9  0x00007fffed2fa47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7fffe92ad700 (LWP 23565)):
#0  0x00007ffff0274b9d in nanosleep () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007ffff4488298 in g_usleep () from /opt/Ardour-4.2.634-dbg/lib/libglib-2.0.so.0
---Type <return> to continue, or q <return> to quit---
#2  0x0000000000fd50e1 in gui_event_loop (ptr=0x0) at ../gtk2_ardour/linux_vst_gui_support.cc:387
#3  0x00007ffff026d182 in start_thread (arg=0x7fffe92ad700) at pthread_create.c:312
#4  0x00007fffed2fa47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7ffff7fa5900 (LWP 23561)):
#0  0x00007ffff0bdbc20 in Pango::Layout::set_font_description(Pango::FontDescription const&) ()
   from /opt/Ardour-4.2.634-dbg/lib/libpangomm-1.4.so.1
#1  0x00007ffff75f2d42 in Gtkmm2ext::pixel_width (str=..., font=...) at ../libs/gtkmm2ext/utils.cc:710
#2  0x0000000000a78a3a in ArdourMarker::setup_name_display (this=0x72785a0) at ../gtk2_ardour/marker.cc:413
#3  0x0000000000a78f90 in ArdourMarker::set_right_label_limit (this=0x72785a0, p=771)
    at ../gtk2_ardour/marker.cc:519
#4  0x000000000085661b in Editor::update_marker_labels (this=0x3f244d0, group=0x347a910)
    at ../gtk2_ardour/editor_markers.cc:356
#5  0x0000000000856326 in Editor::update_marker_labels (this=0x3f244d0) at ../gtk2_ardour/editor_markers.cc:312
#6  0x000000000085704c in Editor::refresh_location_display (this=0x3f244d0)
    at ../gtk2_ardour/editor_markers.cc:548
#7  0x0000000000776723 in Editor::set_samples_per_pixel (this=0x3f244d0, spp=4211)
    at ../gtk2_ardour/editor.cc:4563
#8  0x00000000007768c4 in Editor::visual_changer (this=0x3f244d0, vc=...) at ../gtk2_ardour/editor.cc:4633
#9  0x0000000000776867 in Editor::idle_visual_changer (this=0x3f244d0) at ../gtk2_ardour/editor.cc:4620
---Type <return> to continue, or q <return> to quit---
#10 0x00000000007767dc in Editor::_idle_visual_changer (arg=0x3f244d0) at ../gtk2_ardour/editor.cc:4597
#11 0x00007ffff4459c95 in g_main_context_dispatch () from /opt/Ardour-4.2.634-dbg/lib/libglib-2.0.so.0
#12 0x00007ffff445bb08 in ?? () from /opt/Ardour-4.2.634-dbg/lib/libglib-2.0.so.0
#13 0x00007ffff445bbb5 in g_main_loop_run () from /opt/Ardour-4.2.634-dbg/lib/libglib-2.0.so.0
#14 0x00007ffff38c2657 in gtk_main () from /opt/Ardour-4.2.634-dbg/lib/libgtk-x11-2.0.so.0
#15 0x00007ffff75a4ffd in Gtkmm2ext::UI::run (this=0x19d5140, old_receiver=...) at ../libs/gtkmm2ext/gtk_ui.cc:280
#16 0x0000000000a72a8a in main (argc=1, argv=0x7fffffffd0a8) at ../gtk2_ardour/main.cc:388
(gdb)