
Thread 1 "ardour-6.0.pre0" received signal SIGSEGV, Segmentation fault.
g_type_check_instance_is_fundamentally_a (type_instance=type_instance@entry=0x5555572e5b20, fundamental_type=fundamental_type@entry=80) at gtype.c:4025
4025	  node = lookup_type_node_I (type_instance->g_class->g_type);
(gdb) thread apply all bt

Thread 40 (Thread 0x7fffc6dbe700 (LWP 25913)):
#0  0x00007ffff05cc260 in nanosleep () at /usr/lib/libpthread.so.0
#1  0x00007ffff36a5471 in g_usleep (microseconds=<optimized out>) at gtimer.c:259
#2  0x00007ffff67ed3ed in ARDOUR::AutomationWatch::thread() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff67f32af in boost::_mfi::mf0<void, ARDOUR::AutomationWatch>::operator()(ARDOUR::AutomationWatch*) const () at /usr/lib/ardour6/libardour.so.3
#4  0x00007ffff67f2e6f in void boost::_bi::list1<boost::_bi::value<ARDOUR::AutomationWatch*> >::operator()<boost::_mfi::mf0<void, ARDOUR::AutomationWatch>, boost::_bi::list0>(boost::_bi::type<void>, boost::_mfi::mf0<void, ARDOUR::AutomationWatch>&, boost::_bi::list0&, int) ()
    at /usr/lib/ardour6/libardour.so.3
#5  0x00007ffff67f25a2 in boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AutomationWatch>, boost::_bi::list1<boost::_bi::value<ARDOUR::AutomationWatch*> > >::operator()() () at /usr/lib/ardour6/libardour.so.3
#6  0x00007ffff67f24f2 in sigc::adaptor_functor<boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AutomationWatch>, boost::_bi::list1<boost::_bi::value<ARDOUR::AutomationWatch*> > > >::operator()() const () at /usr/lib/ardour6/libardour.so.3
#7  0x00007ffff67f1e27 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(sigc::internal::slot_rep*) () at /usr/lib/ardour6/libardour.so.3
#8  0x00007ffff3be8cbd in  () at /usr/lib/libglibmm-2.4.so.1
#9  0x00007ffff36a3cea in g_thread_proxy (data=0x55555a614590) at gthread.c:784
#10 0x00007ffff05c208c in start_thread () at /usr/lib/libpthread.so.0
#11 0x00007fffeef4ee7f in clone () at /usr/lib/libc.so.6

Thread 39 (Thread 0x7fffaaffd700 (LWP 25912)):
#0  0x00007ffff05c83bd in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007ffff6dbac5f in ARDOUR::Session::auto_connect_thread_run() () at /usr/lib/ardour6/libardour.so.3
#2  0x00007ffff6dba9a2 in ARDOUR::Session::auto_connect_thread(void*) () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff05c208c in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fffeef4ee7f in clone () at /usr/lib/libc.so.6

Thread 38 (Thread 0x7fffc65bd700 (LWP 25911)):
#0  0x00007ffff05c83bd in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007ffff6e366fb in ARDOUR::Session::emit_thread_run() () at /usr/lib/ardour6/libardour.so.3
#2  0x00007ffff6e36698 in ARDOUR::Session::emit_thread(void*) () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff05c208c in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fffeef4ee7f in clone () at /usr/lib/libc.so.6

Thread 37 (Thread 0x7fffa9ffb700 (LWP 25910)):
#0  0x00007fffeef4497b in poll () at /usr/lib/libc.so.6
#1  0x00007ffff367b613 in g_main_context_poll (priority=<optimized out>, n_fds=5, fds=0x7fff880e2920, timeout=<optimized out>, context=0x5555595a40a0) at gmain.c:4204
#2  0x00007ffff367b613 in g_main_context_iterate (context=0x5555595a40a0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3898
#3  0x00007ffff367b9d2 in g_main_loop_run (loop=0x5555595a41e0) at gmain.c:4099
#4  0x00007ffff4352643 in BaseUI::main_thread() () at /usr/lib/ardour6/libpbd.so.4
#5  0x00007ffff4356cb8 in sigc::bound_mem_functor0<void, BaseUI>::operator()() const () at /usr/lib/ardour6/libpbd.so.4
#6  0x00007ffff4356940 in sigc::adaptor_functor<sigc::bound_mem_functor0<void, BaseUI> >::operator()() const () at /usr/lib/ardour6/libpbd.so.4
#7  0x00007ffff43562c0 in sigc::internal::slot_call0<sigc::bound_mem_functor0<void, BaseUI>, void>::call_it(sigc::internal::slot_rep*) () at /usr/lib/ardour6/libpbd.so.4
#8  0x00007ffff3be8cbd in  () at /usr/lib/libglibmm-2.4.so.1
#9  0x00007ffff36a3cea in g_thread_proxy (data=0x555558b4d540) at gthread.c:784
#10 0x00007ffff05c208c in start_thread () at /usr/lib/libpthread.so.0
#11 0x00007fffeef4ee7f in clone () at /usr/lib/libc.so.6

Thread 36 (Thread 0x7fffd00a7700 (LWP 25909)):
#0  0x00007fffeef4497b in poll () at /usr/lib/libc.so.6
#1  0x00007ffff436a973 in CrossThreadChannel::poll_for_request() () at /usr/lib/ardour6/libpbd.so.4
#2  0x00007ffff436a9ef in CrossThreadChannel::receive(char&, bool) () at /usr/lib/ardour6/libpbd.so.4
#3  0x00007ffff6804a87 in ARDOUR::Butler::thread_work() () at /usr/lib/ardour6/libardour.so.3
#4  0x00007ffff680481c in ARDOUR::Butler::_thread_work(void*) () at /usr/lib/ardour6/libardour.so.3
#5  0x00007ffff438fa2b in  () at /usr/lib/ardour6/libpbd.so.4
#6  0x00007ffff05c208c in start_thread () at /usr/lib/libpthread.so.0
#7  0x00007fffeef4ee7f in clone () at /usr/lib/libc.so.6

Thread 35 (Thread 0x7fffc4cbcd80 (LWP 25908)):
#0  0x00007ffff05cacf6 in do_futex_wait.constprop () at /usr/lib/libpthread.so.0
#1  0x00007ffff05cade8 in __new_sem_wait_slow.constprop.0 () at /usr/lib/libpthread.so.0
#2  0x00007ffff691cc78 in PBD::Semaphore::wait() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff691afdd in ARDOUR::Graph::run_one() () at /usr/lib/ardour6/libardour.so.3
#4  0x00007ffff691b390 in ARDOUR::Graph::helper_thread() () at /usr/lib/ardour6/libardour.so.3
#5  0x00007ffff6921edf in boost::_mfi::mf0<void, ARDOUR::Graph>::operator()(ARDOUR::Graph*) const () at /usr/lib/ardour6/libardour.so.3
#6  0x00007ffff69215bb in void boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> >::operator()<boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list0>(boost::_bi::type<void>, boost::_mfi::mf0<void, ARDOUR::Graph>&, boost::_bi::list0&, int) () at /usr/lib/ardour6/libardour.so.3
#7  0x00007ffff6920a24 in boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> > >::operator()() () at /usr/lib/ardour6/libardour.so.3
#8  0x00007ffff6920193 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(boost::detail::function::function_buffer&) ()
    at /usr/lib/ardour6/libardour.so.3
#9  0x0000555555b2197b in  ()
#10 0x00007fffffffabef in  ()
#11 0x00007fffc4cbc330 in  ()
#12 0x0000000000000000 in  ()
---Type <return> to continue, or q <return> to quit---

Thread 34 (Thread 0x7fffc4cd6d80 (LWP 25907)):
#0  0x00007ffff05cacf6 in do_futex_wait.constprop () at /usr/lib/libpthread.so.0
#1  0x00007ffff05cade8 in __new_sem_wait_slow.constprop.0 () at /usr/lib/libpthread.so.0
#2  0x00007ffff691cc78 in PBD::Semaphore::wait() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff691afdd in ARDOUR::Graph::run_one() () at /usr/lib/ardour6/libardour.so.3
#4  0x00007ffff691b390 in ARDOUR::Graph::helper_thread() () at /usr/lib/ardour6/libardour.so.3
#5  0x00007ffff6921edf in boost::_mfi::mf0<void, ARDOUR::Graph>::operator()(ARDOUR::Graph*) const () at /usr/lib/ardour6/libardour.so.3
#6  0x00007ffff69215bb in void boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> >::operator()<boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list0>(boost::_bi::type<void>, boost::_mfi::mf0<void, ARDOUR::Graph>&, boost::_bi::list0&, int) () at /usr/lib/ardour6/libardour.so.3
#7  0x00007ffff6920a24 in boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> > >::operator()() () at /usr/lib/ardour6/libardour.so.3
#8  0x00007ffff6920193 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(boost::detail::function::function_buffer&) ()
    at /usr/lib/ardour6/libardour.so.3
#9  0x0000555555b2197b in  ()
#10 0x00007fffffffabef in  ()
#11 0x00007fffc4cd6330 in  ()
#12 0x0000000000000000 in  ()

Thread 33 (Thread 0x7fffc4cf0d80 (LWP 25906)):
#0  0x00007ffff05cacf6 in do_futex_wait.constprop () at /usr/lib/libpthread.so.0
#1  0x00007ffff05cade8 in __new_sem_wait_slow.constprop.0 () at /usr/lib/libpthread.so.0
#2  0x00007ffff691cc78 in PBD::Semaphore::wait() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff691a356 in ARDOUR::Graph::restart_cycle() () at /usr/lib/ardour6/libardour.so.3
#4  0x00007ffff691a265 in ARDOUR::Graph::dec_ref() () at /usr/lib/ardour6/libardour.so.3
#5  0x00007ffff69226e5 in ARDOUR::GraphNode::finish(int) () at /usr/lib/ardour6/libardour.so.3
#6  0x00007ffff691b166 in ARDOUR::Graph::run_one() () at /usr/lib/ardour6/libardour.so.3
#7  0x00007ffff691b693 in ARDOUR::Graph::main_thread() () at /usr/lib/ardour6/libardour.so.3
#8  0x00007ffff6921edf in boost::_mfi::mf0<void, ARDOUR::Graph>::operator()(ARDOUR::Graph*) const () at /usr/lib/ardour6/libardour.so.3
#9  0x00007ffff69215bb in void boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> >::operator()<boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list0>(boost::_bi::type<void>, boost::_mfi::mf0<void, ARDOUR::Graph>&, boost::_bi::list0&, int) () at /usr/lib/ardour6/libardour.so.3
#10 0x00007ffff6920a24 in boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> > >::operator()() () at /usr/lib/ardour6/libardour.so.3
#11 0x00007ffff6920193 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(boost::detail::function::function_buffer&) ()
    at /usr/lib/ardour6/libardour.so.3
#12 0x0000555555b2197b in  ()
#13 0x00007fffffffabef in  ()
#14 0x00007fffc4cf0330 in  ()
#15 0x0000000000000000 in  ()

Thread 32 (Thread 0x7fffc4d0ad80 (LWP 25905)):
#0  0x00007ffff05cacf6 in do_futex_wait.constprop () at /usr/lib/libpthread.so.0
#1  0x00007ffff05cade8 in __new_sem_wait_slow.constprop.0 () at /usr/lib/libpthread.so.0
#2  0x00007ffff691cc78 in PBD::Semaphore::wait() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff6d7e624 in ARDOUR::RTTaskList::run() () at /usr/lib/ardour6/libardour.so.3
#4  0x00007ffff6d7e3c6 in ARDOUR::RTTaskList::_thread_run(void*) () at /usr/lib/ardour6/libardour.so.3
#5  0x00007ffff05c208c in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fffeef4ee7f in clone () at /usr/lib/libc.so.6

Thread 31 (Thread 0x7fffc4d24d80 (LWP 25904)):
#0  0x00007ffff05cacf6 in do_futex_wait.constprop () at /usr/lib/libpthread.so.0
#1  0x00007ffff05cade8 in __new_sem_wait_slow.constprop.0 () at /usr/lib/libpthread.so.0
#2  0x00007ffff691cc78 in PBD::Semaphore::wait() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff6d7e624 in ARDOUR::RTTaskList::run() () at /usr/lib/ardour6/libardour.so.3
#4  0x00007ffff6d7e3c6 in ARDOUR::RTTaskList::_thread_run(void*) () at /usr/lib/ardour6/libardour.so.3
#5  0x00007ffff05c208c in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fffeef4ee7f in clone () at /usr/lib/libc.so.6

Thread 30 (Thread 0x7fffc4d3ed80 (LWP 25903)):
#0  0x00007ffff05cacf6 in do_futex_wait.constprop () at /usr/lib/libpthread.so.0
#1  0x00007ffff05cade8 in __new_sem_wait_slow.constprop.0 () at /usr/lib/libpthread.so.0
#2  0x00007ffff691cc78 in PBD::Semaphore::wait() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff6d7e624 in ARDOUR::RTTaskList::run() () at /usr/lib/ardour6/libardour.so.3
#4  0x00007ffff6d7e3c6 in ARDOUR::RTTaskList::_thread_run(void*) () at /usr/lib/ardour6/libardour.so.3
#5  0x00007ffff05c208c in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fffeef4ee7f in clone () at /usr/lib/libc.so.6

Thread 29 (Thread 0x7fffaa7fc700 (LWP 25902)):
#0  0x00007fffeef49879 in syscall () at /usr/lib/libc.so.6
#1  0x00007ffff36c27ed in g_cond_wait_until (cond=cond@entry=0x5555571b8fe8, mutex=mutex@entry=0x5555571b8fe0, end_time=end_time@entry=9708728108) at gthread-posix.c:1449
#2  0x00007ffff364d953 in g_async_queue_pop_intern_unlocked (queue=queue@entry=0x5555571b8fe0, wait=wait@entry=1, end_time=end_time@entry=9708728108) at gasyncqueue.c:422
#3  0x00007ffff364df3e in g_async_queue_timeout_pop (queue=0x5555571b8fe0, timeout=timeout@entry=15000000) at gasyncqueue.c:543
#4  0x00007ffff36a4801 in g_thread_pool_wait_for_new_pool () at gthreadpool.c:167
---Type <return> to continue, or q <return> to quit---
#5  0x00007ffff36a4801 in g_thread_pool_thread_proxy (data=<optimized out>) at gthreadpool.c:364
#6  0x00007ffff36a3cea in g_thread_proxy (data=0x555558191450) at gthread.c:784
#7  0x00007ffff05c208c in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007fffeef4ee7f in clone () at /usr/lib/libc.so.6

Thread 23 (Thread 0x7fffabfff700 (LWP 25896)):
#0  0x00007ffff05cc260 in nanosleep () at /usr/lib/libpthread.so.0
#1  0x00007ffff36a5471 in g_usleep (microseconds=<optimized out>) at gtimer.c:259
#2  0x00007fffd8436ba7 in ARDOUR::DummyAudioBackend::main_process_thread() () at /usr/lib/ardour6/backends/libdummy_audiobackend.so
#3  0x00007fffd843254c in  () at /usr/lib/ardour6/backends/libdummy_audiobackend.so
#4  0x00007ffff05c208c in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007fffeef4ee7f in clone () at /usr/lib/libc.so.6

Thread 9 (Thread 0x7fffc75bf700 (LWP 25878)):
#0  0x00007fffeef4497b in poll () at /usr/lib/libc.so.6
#1  0x00007ffff367b613 in g_main_context_poll (priority=<optimized out>, n_fds=3, fds=0x5555571ca6a0, timeout=<optimized out>, context=0x5555571c9020) at gmain.c:4204
#2  0x00007ffff367b613 in g_main_context_iterate (context=0x5555571c9020, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3898
#3  0x00007ffff367b9d2 in g_main_loop_run (loop=0x5555571c9160) at gmain.c:4099
#4  0x00007fffebfdab78 in gdbus_shared_thread_func (user_data=0x5555571c8ff0) at gdbusprivate.c:275
#5  0x00007ffff36a3cea in g_thread_proxy (data=0x55555718c990) at gthread.c:784
#6  0x00007ffff05c208c in start_thread () at /usr/lib/libpthread.so.0
#7  0x00007fffeef4ee7f in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7fffc7dc0700 (LWP 25877)):
#0  0x00007fffeef4497b in poll () at /usr/lib/libc.so.6
#1  0x00007ffff367b613 in g_main_context_poll (priority=<optimized out>, n_fds=2, fds=0x5555571bfa70, timeout=<optimized out>, context=0x5555571bac90) at gmain.c:4204
#2  0x00007ffff367b613 in g_main_context_iterate (context=context@entry=0x5555571bac90, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3898
#3  0x00007ffff367b72e in g_main_context_iteration (context=0x5555571bac90, may_block=may_block@entry=1) at gmain.c:3964
#4  0x00007ffff367b782 in glib_worker_main (data=<optimized out>) at gmain.c:5773
#5  0x00007ffff36a3cea in g_thread_proxy (data=0x55555718c770) at gthread.c:784
#6  0x00007ffff05c208c in start_thread () at /usr/lib/libpthread.so.0
#7  0x00007fffeef4ee7f in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7fffd37fe700 (LWP 25876)):
#0  0x00007fffeef49879 in syscall () at /usr/lib/libc.so.6
#1  0x00007ffff36c26d1 in g_cond_wait (cond=0x555557078a38, mutex=0x555557078a48) at gthread-posix.c:1402
#2  0x00007ffff6791ad1 in ARDOUR::AudioEngine::do_devicelist_update() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff679e1ef in boost::_mfi::mf0<void, ARDOUR::AudioEngine>::operator()(ARDOUR::AudioEngine*) const () at /usr/lib/ardour6/libardour.so.3
#4  0x00007ffff679dc69 in void boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> >::operator()<boost::_mfi::mf0<void, ARDOUR::AudioEngine>, boost::_bi::list0>(boost::_bi::type<void>, boost::_mfi::mf0<void, ARDOUR::AudioEngine>&, boost::_bi::list0&, int) ()
    at /usr/lib/ardour6/libardour.so.3
#5  0x00007ffff679d452 in boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AudioEngine>, boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> > >::operator()() () at /usr/lib/ardour6/libardour.so.3
#6  0x00007ffff679cc40 in sigc::adaptor_functor<boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AudioEngine>, boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> > > >::operator()() const () at /usr/lib/ardour6/libardour.so.3
#7  0x00007ffff679beef 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(sigc::internal::slot_rep*) () at /usr/lib/ardour6/libardour.so.3
#8  0x00007ffff3be8cbd in  () at /usr/lib/libglibmm-2.4.so.1
#9  0x00007ffff36a3cea in g_thread_proxy (data=0x555557094940) at gthread.c:784
#10 0x00007ffff05c208c in start_thread () at /usr/lib/libpthread.so.0
#11 0x00007fffeef4ee7f in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7fffd3fff700 (LWP 25875)):
#0  0x00007fffeef49879 in syscall () at /usr/lib/libc.so.6
#1  0x00007ffff36c26d1 in g_cond_wait (cond=0x555557078a08, mutex=0x555557078a18) at gthread-posix.c:1402
#2  0x00007ffff6791866 in ARDOUR::AudioEngine::do_reset_backend() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff679e1ef in boost::_mfi::mf0<void, ARDOUR::AudioEngine>::operator()(ARDOUR::AudioEngine*) const () at /usr/lib/ardour6/libardour.so.3
#4  0x00007ffff679dc69 in void boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> >::operator()<boost::_mfi::mf0<void, ARDOUR::AudioEngine>, boost::_bi::list0>(boost::_bi::type<void>, boost::_mfi::mf0<void, ARDOUR::AudioEngine>&, boost::_bi::list0&, int) ()
    at /usr/lib/ardour6/libardour.so.3
#5  0x00007ffff679d452 in boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AudioEngine>, boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> > >::operator()() () at /usr/lib/ardour6/libardour.so.3
#6  0x00007ffff679cc40 in sigc::adaptor_functor<boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AudioEngine>, boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> > > >::operator()() const () at /usr/lib/ardour6/libardour.so.3
#7  0x00007ffff679beef 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(sigc::internal::slot_rep*) () at /usr/lib/ardour6/libardour.so.3
#8  0x00007ffff3be8cbd in  () at /usr/lib/libglibmm-2.4.so.1
#9  0x00007ffff36a3cea in g_thread_proxy (data=0x5555570948f0) at gthread.c:784
#10 0x00007ffff05c208c in start_thread () at /usr/lib/libpthread.so.0
#11 0x00007fffeef4ee7f in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7fffdbfff700 (LWP 25874)):
#0  0x00007fffeef49879 in syscall () at /usr/lib/libc.so.6
#1  0x00007ffff36c26d1 in g_cond_wait (cond=0x7ffff7663990 <ARDOUR::Analyser::SourcesToAnalyse>, mutex=0x7ffff7663980 <ARDOUR::Analyser::analysis_queue_lock>) at gthread-posix.c:1402
#2  0x00007ffff6741875 in ARDOUR::Analyser::work() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff674160c in  () at /usr/lib/ardour6/libardour.so.3
#4  0x0000555556371a89 in  ()
---Type <return> to continue, or q <return> to quit---
#5  0x0000000000000000 in  ()

Thread 4 (Thread 0x7fffe0b0c700 (LWP 25873)):
#0  0x00007fffeef49879 in syscall () at /usr/lib/libc.so.6
#1  0x00007ffff36c26d1 in g_cond_wait (cond=0x7ffff76665b0 <ARDOUR::SourceFactory::PeaksToBuild>, mutex=0x7ffff76665c0 <ARDOUR::SourceFactory::peak_building_lock>) at gthread-posix.c:1402
#2  0x00007ffff6eced9d in  () at /usr/lib/ardour6/libardour.so.3
#3  0x0000555556371a89 in  ()
#4  0x0000000000000000 in  ()

Thread 3 (Thread 0x7fffe130d700 (LWP 25872)):
#0  0x00007fffeef49879 in syscall () at /usr/lib/libc.so.6
#1  0x00007ffff36c26d1 in g_cond_wait (cond=0x7ffff76665b0 <ARDOUR::SourceFactory::PeaksToBuild>, mutex=0x7ffff76665c0 <ARDOUR::SourceFactory::peak_building_lock>) at gthread-posix.c:1402
#2  0x00007ffff6eced9d in  () at /usr/lib/ardour6/libardour.so.3
#3  0x0000555556371a89 in  ()
#4  0x0000000000000000 in  ()

Thread 2 (Thread 0x7fffe1b0e700 (LWP 25871)):
#0  0x00007ffff05cc260 in nanosleep () at /usr/lib/libpthread.so.0
#1  0x00007ffff36a5471 in g_usleep (microseconds=<optimized out>) at gtimer.c:259
#2  0x00005555566ce5a7 in  ()
#3  0x0000000000000000 in  ()

Thread 1 (Thread 0x7ffff7f95940 (LWP 25867)):
#0  0x00007ffff397e27f in g_type_check_instance_is_fundamentally_a (type_instance=type_instance@entry=0x5555572e5b20, fundamental_type=fundamental_type@entry=80) at gtype.c:4025
#1  0x00007ffff395bb1f in g_object_ref (_object=0x5555572e5b20) at gobject.c:3206
#2  0x00007ffff2f1d125 in  () at /usr/lib/libgtk-x11-2.0.so.0
#3  0x00007ffff2f197cc in  () at /usr/lib/libgtk-x11-2.0.so.0
#7  0x00007ffff3974180 in <emit signal ??? on instance 0x555558445c90 [GtkWindow]> (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at gsignal.c:3447
    #4  0x00007ffff3956c2d in g_closure_invoke (closure=0x55555bc8f550, return_value=0x7fffffffdf00, n_param_values=2, param_values=0x7fffffffdf60, invocation_hint=0x7fffffffdee0) at gclosure.c:804
    #5  0x00007ffff396abb0 in signal_emit_unlocked_R (node=node@entry=0x55555710f8a0, detail=detail@entry=0, instance=instance@entry=0x555558445c90, emission_return=emission_return@entry=0x7fffffffe080, instance_and_params=instance_and_params@entry=0x7fffffffdf60)
    at gsignal.c:3635
    #6  0x00007ffff39730d1 in g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, var_args=var_args@entry=0x7fffffffe130) at gsignal.c:3401
#8  0x00007ffff3034153 in  () at /usr/lib/libgtk-x11-2.0.so.0
#9  0x00007ffff2f17f1b in gtk_main_do_event () at /usr/lib/libgtk-x11-2.0.so.0
#10 0x00007ffff2b90d5e in  () at /usr/lib/libgdk-x11-2.0.so.0
#11 0x00007ffff367b458 in g_main_dispatch (context=0x5555570b6220) at gmain.c:3177
#12 0x00007ffff367b458 in g_main_context_dispatch (context=context@entry=0x5555570b6220) at gmain.c:3830
#13 0x00007ffff367b6a1 in g_main_context_iterate (context=0x5555570b6220, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3903
#14 0x00007ffff367b9d2 in g_main_loop_run (loop=0x5555572f04e0) at gmain.c:4099
#15 0x00007ffff2f16df3 in gtk_main () at /usr/lib/libgtk-x11-2.0.so.0
#16 0x00007ffff4729777 in Gtkmm2ext::UI::run(Receiver&) () at /usr/lib/ardour6/libgtkmm2ext.so.0
#17 0x00005555560c5e69 in  ()
#18 0x00007fffffffe708 in  ()
#19 0x0000000156f11188 in  ()
#20 0x00007fffffffe540 in  ()
#21 0x0000555555afb006 in  ()
#22 0x00007fffffffe560 in  ()
#23 0x0000555556f11180 in  ()
#24 0x00007fffffffe560 in  ()
#25 0x0000555555afb03e in  ()
#26 0x00000000000000fa in  ()
#27 0x00007fffef810cc0 in std::basic_ios<wchar_t, std::char_traits<wchar_t> >::~basic_ios() (this=<optimized out>, __in_chrg=<optimized out>) at /build/gcc/src/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/basic_ios.h:282
#28 0x00007fffef810cc0 in std::basic_ostream<wchar_t, std::char_traits<wchar_t> >::basic_ostream(std::basic_streambuf<wchar_t, std::char_traits<wchar_t> >*) (__sb=<optimized out>, this=<optimized out>, __in_chrg=<optimized out>, __vtt_parm=<optimized out>)
    at /build/gcc/src/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/ostream:85
#29 0x00007fffef810cc0 in std::ios_base::Init::Init() (this=<optimized out>) at /build/gcc/src/gcc/libstdc++-v3/src/c++98/ios_init.cc:108
#30 0x000000010000ffff in  ()
#31 0x0000000000000063 in  ()
#32 0xb8277add21398f00 in  ()
#33 0x0000555556dbb9c8 in  ()
#34 0x0000000000000101 in  ()
#35 0x0000555556dbb9c8 in  ()
#36 0x0000000000000001 in  ()
#37 0x0000000000000000 in  ()
(gdb)
