Thread 411 (Thread 0x7fff2a7fc700 (LWP 31548)):
#0  0x00007ffff4c44355 in raise () at /usr/lib/libc.so.6
#1  0x00007ffff4c2d853 in abort () at /usr/lib/libc.so.6
#2  0x00007ffff4c87878 in __libc_message () at /usr/lib/libc.so.6
#3  0x00007ffff4d1788a in __fortify_fail () at /usr/lib/libc.so.6
#4  0x00007ffff4d16114 in  () at /usr/lib/libc.so.6
#5  0x00007ffff4d177cb in  () at /usr/lib/libc.so.6
#6  0x00007ffff6ec2bd6 in PBD::SystemExec::output_interposer() () at /usr/lib/ardour6/libpbd.so.4
#7  0x00007ffff6ec2d5a in  () at /usr/lib/ardour6/libpbd.so.4
#8  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 410 (Thread 0x7fff9cbf9700 (LWP 31544)):
#0  0x00007ffff4ccf571 in clock_nanosleep@GLIBC_2.2.5 () at /usr/lib/libc.so.6
#1  0x00007ffff4cd4e87 in nanosleep () at /usr/lib/libc.so.6
#2  0x00007ffff4cffd99 in usleep () at /usr/lib/libc.so.6
#3  0x00007fffc809ebd0 in DISTRHO::Thread::_entryPoint(void*) () at /usr/lib/lv2/ZynAddSubFX.lv2/ZynAddSubFX.so
#4  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 407 (Thread 0x7fff2affd700 (LWP 31331)):
#0  0x00007ffff4d0271d in syscall () at /usr/lib/libc.so.6
#1  0x00007ffff6b30101 in g_cond_wait () at /usr/lib/libglib-2.0.so.0
#2  0x00007ffff7f9005d in ArdourWaveView::WaveViewDrawRequestQueue::dequeue(bool) () at /usr/lib/ardour6/libwaveview.so.0
#3  0x00007ffff7f90510 in ArdourWaveView::WaveViewThreads::dequeue_draw_request() () at /usr/lib/ardour6/libwaveview.so.0
#4  0x00007ffff7f90573 in ArdourWaveView::WaveViewDrawingThread::run() () at /usr/lib/ardour6/libwaveview.so.0
#5  0x00007ffff6c63d7a in  () at /usr/lib/libglibmm-2.4.so.1
#6  0x00007ffff6b10511 in  () at /usr/lib/libglib-2.0.so.0
#7  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 406 (Thread 0x7fff2b7fe700 (LWP 31330)):
#0  0x00007ffff4d0271d in syscall () at /usr/lib/libc.so.6
#1  0x00007ffff6b30101 in g_cond_wait () at /usr/lib/libglib-2.0.so.0
#2  0x00007ffff7f9005d in ArdourWaveView::WaveViewDrawRequestQueue::dequeue(bool) () at /usr/lib/ardour6/libwaveview.so.0
#3  0x00007ffff7f90510 in ArdourWaveView::WaveViewThreads::dequeue_draw_request() () at /usr/lib/ardour6/libwaveview.so.0
#4  0x00007ffff7f90573 in ArdourWaveView::WaveViewDrawingThread::run() () at /usr/lib/ardour6/libwaveview.so.0
#5  0x00007ffff6c63d7a in  () at /usr/lib/libglibmm-2.4.so.1
#6  0x00007ffff6b10511 in  () at /usr/lib/libglib-2.0.so.0
#7  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 405 (Thread 0x7fff2bfff700 (LWP 31329)):
#0  0x00007ffff4d0271d in syscall () at /usr/lib/libc.so.6
#1  0x00007ffff6b30101 in g_cond_wait () at /usr/lib/libglib-2.0.so.0
#2  0x00007ffff7f9005d in ArdourWaveView::WaveViewDrawRequestQueue::dequeue(bool) () at /usr/lib/ardour6/libwaveview.so.0
#3  0x00007ffff7f90510 in ArdourWaveView::WaveViewThreads::dequeue_draw_request() () at /usr/lib/ardour6/libwaveview.so.0
#4  0x00007ffff7f90573 in ArdourWaveView::WaveViewDrawingThread::run() () at /usr/lib/ardour6/libwaveview.so.0
#5  0x00007ffff6c63d7a in  () at /usr/lib/libglibmm-2.4.so.1
#6  0x00007ffff6b10511 in  () at /usr/lib/libglib-2.0.so.0
#7  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 404 (Thread 0x7fff3881d700 (LWP 31328)):
#0  0x00007ffff4d0271d in syscall () at /usr/lib/libc.so.6
#1  0x00007ffff6b30101 in g_cond_wait () at /usr/lib/libglib-2.0.so.0
#2  0x00007ffff7f9005d in ArdourWaveView::WaveViewDrawRequestQueue::dequeue(bool) () at /usr/lib/ardour6/libwaveview.so.0
#3  0x00007ffff7f90510 in ArdourWaveView::WaveViewThreads::dequeue_draw_request() () at /usr/lib/ardour6/libwaveview.so.0
#4  0x00007ffff7f90573 in ArdourWaveView::WaveViewDrawingThread::run() () at /usr/lib/ardour6/libwaveview.so.0
#5  0x00007ffff6c63d7a in  () at /usr/lib/libglibmm-2.4.so.1
#6  0x00007ffff6b10511 in  () at /usr/lib/libglib-2.0.so.0
#7  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 403 (Thread 0x7fff3901e700 (LWP 31327)):
#0  0x00007ffff4d0271d in syscall () at /usr/lib/libc.so.6
#1  0x00007ffff6b30101 in g_cond_wait () at /usr/lib/libglib-2.0.so.0
#2  0x00007ffff7f9005d in ArdourWaveView::WaveViewDrawRequestQueue::dequeue(bool) () at /usr/lib/ardour6/libwaveview.so.0
#3  0x00007ffff7f90510 in ArdourWaveView::WaveViewThreads::dequeue_draw_request() () at /usr/lib/ardour6/libwaveview.so.0
#4  0x00007ffff7f90573 in ArdourWaveView::WaveViewDrawingThread::run() () at /usr/lib/ardour6/libwaveview.so.0
#5  0x00007ffff6c63d7a in  () at /usr/lib/libglibmm-2.4.so.1
#6  0x00007ffff6b10511 in  () at /usr/lib/libglib-2.0.so.0
#7  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 402 (Thread 0x7fff3981f700 (LWP 31326)):
#0  0x00007ffff4d0271d in syscall () at /usr/lib/libc.so.6
#1  0x00007ffff6b30101 in g_cond_wait () at /usr/lib/libglib-2.0.so.0
#2  0x00007ffff7f9005d in ArdourWaveView::WaveViewDrawRequestQueue::dequeue(bool) () at /usr/lib/ardour6/libwaveview.so.0
#3  0x00007ffff7f90510 in ArdourWaveView::WaveViewThreads::dequeue_draw_request() () at /usr/lib/ardour6/libwaveview.so.0
#4  0x00007ffff7f90573 in ArdourWaveView::WaveViewDrawingThread::run() () at /usr/lib/ardour6/libwaveview.so.0
#5  0x00007ffff6c63d7a in  () at /usr/lib/libglibmm-2.4.so.1
#6  0x00007ffff6b10511 in  () at /usr/lib/libglib-2.0.so.0
#7  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 401 (Thread 0x7fff3a020700 (LWP 31325)):
#0  0x00007ffff4d0271d in syscall () at /usr/lib/libc.so.6
#1  0x00007ffff6b30101 in g_cond_wait () at /usr/lib/libglib-2.0.so.0
#2  0x00007ffff7f9005d in ArdourWaveView::WaveViewDrawRequestQueue::dequeue(bool) () at /usr/lib/ardour6/libwaveview.so.0
#3  0x00007ffff7f90510 in ArdourWaveView::WaveViewThreads::dequeue_draw_request() () at /usr/lib/ardour6/libwaveview.so.0
#4  0x00007ffff7f90573 in ArdourWaveView::WaveViewDrawingThread::run() () at /usr/lib/ardour6/libwaveview.so.0
#5  0x00007ffff6c63d7a in  () at /usr/lib/libglibmm-2.4.so.1
#6  0x00007ffff6b10511 in  () at /usr/lib/libglib-2.0.so.0
#7  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 400 (Thread 0x7fff5cbdb700 (LWP 31286)):
#0  0x00007ffff4ccf571 in clock_nanosleep@GLIBC_2.2.5 () at /usr/lib/libc.so.6
#1  0x00007ffff4cd4e87 in nanosleep () at /usr/lib/libc.so.6
#2  0x00007ffff6b0df31 in g_usleep () at /usr/lib/libglib-2.0.so.0
#3  0x00007ffff766ab56 in ARDOUR::AutomationWatch::thread() () at /usr/lib/ardour6/libardour.so.3
#4  0x00007ffff6c63d7a in  () at /usr/lib/libglibmm-2.4.so.1
#5  0x00007ffff6b10511 in  () at /usr/lib/libglib-2.0.so.0
#6  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#7  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 399 (Thread 0x7fff5da67700 (LWP 31285)):
#0  0x00007ffff56e8e32 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007ffff7b08fb5 in ARDOUR::Session::auto_connect_thread_run() () at /usr/lib/ardour6/libardour.so.3
#2  0x00007ffff7b092aa in ARDOUR::Session::auto_connect_thread(void*) () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 398 (Thread 0x7fff5e268700 (LWP 31284)):
#0  0x00007ffff56e8e32 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007ffff7b711d5 in ARDOUR::Session::emit_thread_run() () at /usr/lib/ardour6/libardour.so.3
#2  0x00007ffff7b7120a in ARDOUR::Session::emit_thread(void*) () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 397 (Thread 0x7fffa77fe700 (LWP 31283)):
#0  0x00007ffff4cfd05f in poll () at /usr/lib/libc.so.6
#1  0x00007ffff6b35f38 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007ffff6ae6c03 in g_main_loop_run () at /usr/lib/libglib-2.0.so.0
#3  0x00007ffff6c63d7a in  () at /usr/lib/libglibmm-2.4.so.1
#4  0x00007ffff6b10511 in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 186 (Thread 0x7fffc9814700 (LWP 31032)):
#0  0x00007ffff56eb8f4 in do_futex_wait.constprop () at /usr/lib/libpthread.so.0
#1  0x00007ffff56eb9f8 in __new_sem_wait_slow.constprop.0 () at /usr/lib/libpthread.so.0
#2  0x00007ffff7c5686a in ARDOUR::Worker::run() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff6c63d7a in  () at /usr/lib/libglibmm-2.4.so.1
#4  0x00007ffff6b10511 in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 185 (Thread 0x7fffa7fff700 (LWP 31031)):
#0  0x00007ffff56eb8f4 in do_futex_wait.constprop () at /usr/lib/libpthread.so.0
#1  0x00007ffff56eb9f8 in __new_sem_wait_slow.constprop.0 () at /usr/lib/libpthread.so.0
#2  0x00007ffff7c5686a in ARDOUR::Worker::run() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff6c63d7a in  () at /usr/lib/libglibmm-2.4.so.1
#4  0x00007ffff6b10511 in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 184 (Thread 0x7fff9d3fa700 (LWP 31030)):
#0  0x00007ffff56eb8f4 in do_futex_wait.constprop () at /usr/lib/libpthread.so.0
#1  0x00007ffff56eb9f8 in __new_sem_wait_slow.constprop.0 () at /usr/lib/libpthread.so.0
#2  0x00007ffff7c5686a in ARDOUR::Worker::run() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff6c63d7a in  () at /usr/lib/libglibmm-2.4.so.1
#4  0x00007ffff6b10511 in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 45 (Thread 0x7fffa6ffd700 (LWP 30837)):
#0  0x00007ffff56eb8f4 in do_futex_wait.constprop () at /usr/lib/libpthread.so.0
#1  0x00007ffff56eb9f8 in __new_sem_wait_slow.constprop.0 () at /usr/lib/libpthread.so.0
#2  0x00007ffff7c56785 in ARDOUR::Worker::run() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff6c63d7a in  () at /usr/lib/libglibmm-2.4.so.1
#4  0x00007ffff6b10511 in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 44 (Thread 0x7fffa67fc700 (LWP 30809)):
#0  0x00007ffff4cfd05f in poll () at /usr/lib/libc.so.6
#1  0x00007ffff6b35f38 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007ffff6ae6c03 in g_main_loop_run () at /usr/lib/libglib-2.0.so.0
#3  0x00007ffff6c63d7a in  () at /usr/lib/libglibmm-2.4.so.1
#4  0x00007ffff6b10511 in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 43 (Thread 0x7fffca14f700 (LWP 30808)):
#0  0x00007ffff4cfd05f in poll () at /usr/lib/libc.so.6
#1  0x00007ffff6e8b209 in CrossThreadChannel::poll_for_request() () at /usr/lib/ardour6/libpbd.so.4
#2  0x00007ffff6e8b28b in CrossThreadChannel::receive(char&, bool) () at /usr/lib/ardour6/libpbd.so.4
#3  0x00007ffff7677777 in ARDOUR::Butler::thread_work() () at /usr/lib/ardour6/libardour.so.3
#4  0x00007ffff6eaed69 in  () at /usr/lib/ardour6/libpbd.so.4
#5  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 42 (Thread 0x7fffca292bc0 (LWP 30803)):
#0  0x00007ffff56eb8f4 in do_futex_wait.constprop () at /usr/lib/libpthread.so.0
#1  0x00007ffff56eb9f8 in __new_sem_wait_slow.constprop.0 () at /usr/lib/libpthread.so.0
#2  0x00007ffff774cbdc in ARDOUR::Graph::run_one() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff774ce09 in ARDOUR::Graph::helper_thread() () at /usr/lib/ardour6/libardour.so.3
#4  0x00007fffe533f796 in ARDOUR::AlsaAudioBackend::alsa_process_thread(void*) () at /usr/lib/ardour6/backends/libalsa_audiobackend.so
#5  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 41 (Thread 0x7fffcb041bc0 (LWP 30802)):
#0  0x00007ffff56eb8f4 in do_futex_wait.constprop () at /usr/lib/libpthread.so.0
#1  0x00007ffff56eb9f8 in __new_sem_wait_slow.constprop.0 () at /usr/lib/libpthread.so.0
#2  0x00007ffff774cbdc in ARDOUR::Graph::run_one() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff774ce09 in ARDOUR::Graph::helper_thread() () at /usr/lib/ardour6/libardour.so.3
#4  0x00007fffe533f796 in ARDOUR::AlsaAudioBackend::alsa_process_thread(void*) () at /usr/lib/ardour6/backends/libalsa_audiobackend.so
#5  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 40 (Thread 0x7fffcb065bc0 (LWP 30801)):
#0  0x00007ffff56eb8f4 in do_futex_wait.constprop () at /usr/lib/libpthread.so.0
#1  0x00007ffff56eb9f8 in __new_sem_wait_slow.constprop.0 () at /usr/lib/libpthread.so.0
#2  0x00007ffff774cbdc in ARDOUR::Graph::run_one() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff774ce09 in ARDOUR::Graph::helper_thread() () at /usr/lib/ardour6/libardour.so.3
#4  0x00007fffe533f796 in ARDOUR::AlsaAudioBackend::alsa_process_thread(void*) () at /usr/lib/ardour6/backends/libalsa_audiobackend.so
#5  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 39 (Thread 0x7fffcb089bc0 (LWP 30800)):
#0  0x00007ffff56eb8f4 in do_futex_wait.constprop () at /usr/lib/libpthread.so.0
#1  0x00007ffff56eb9f8 in __new_sem_wait_slow.constprop.0 () at /usr/lib/libpthread.so.0
#2  0x00007ffff774ca7e in ARDOUR::Graph::reached_terminal_node() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff774ce09 in ARDOUR::Graph::helper_thread() () at /usr/lib/ardour6/libardour.so.3
#4  0x00007fffe533f796 in ARDOUR::AlsaAudioBackend::alsa_process_thread(void*) () at /usr/lib/ardour6/backends/libalsa_audiobackend.so
#5  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 38 (Thread 0x7fffcb0adbc0 (LWP 30799)):
#0  0x00007ffff56eb8f4 in do_futex_wait.constprop () at /usr/lib/libpthread.so.0
#1  0x00007ffff56eb9f8 in __new_sem_wait_slow.constprop.0 () at /usr/lib/libpthread.so.0
#2  0x00007ffff774cbdc in ARDOUR::Graph::run_one() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff774ce09 in ARDOUR::Graph::helper_thread() () at /usr/lib/ardour6/libardour.so.3
#4  0x00007fffe533f796 in ARDOUR::AlsaAudioBackend::alsa_process_thread(void*) () at /usr/lib/ardour6/backends/libalsa_audiobackend.so
#5  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 37 (Thread 0x7fffcb0d1bc0 (LWP 30798)):
#0  0x00007ffff56eb8f4 in do_futex_wait.constprop () at /usr/lib/libpthread.so.0
#1  0x00007ffff56eb9f8 in __new_sem_wait_slow.constprop.0 () at /usr/lib/libpthread.so.0
#2  0x00007ffff774cbdc in ARDOUR::Graph::run_one() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff774ce09 in ARDOUR::Graph::helper_thread() () at /usr/lib/ardour6/libardour.so.3
#4  0x00007fffe533f796 in ARDOUR::AlsaAudioBackend::alsa_process_thread(void*) () at /usr/lib/ardour6/backends/libalsa_audiobackend.so
#5  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 36 (Thread 0x7fffcb0f5bc0 (LWP 30797)):
#0  0x00007ffff56eb8f4 in do_futex_wait.constprop () at /usr/lib/libpthread.so.0
#1  0x00007ffff56eb9f8 in __new_sem_wait_slow.constprop.0 () at /usr/lib/libpthread.so.0
#2  0x00007ffff774cbdc in ARDOUR::Graph::run_one() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff774d231 in ARDOUR::Graph::main_thread() () at /usr/lib/ardour6/libardour.so.3
#4  0x00007fffe533f796 in ARDOUR::AlsaAudioBackend::alsa_process_thread(void*) () at /usr/lib/ardour6/backends/libalsa_audiobackend.so
#5  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 35 (Thread 0x7fffcb101bc0 (LWP 30796)):
#0  0x00007ffff56eb8f4 in do_futex_wait.constprop () at /usr/lib/libpthread.so.0
#1  0x00007ffff56eb9f8 in __new_sem_wait_slow.constprop.0 () at /usr/lib/libpthread.so.0
#2  0x00007ffff7ae1a99 in ARDOUR::RTTaskList::run() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff7ae1dda in ARDOUR::RTTaskList::_thread_run(void*) () at /usr/lib/ardour6/libardour.so.3
#4  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 34 (Thread 0x7fffcb10dbc0 (LWP 30795)):
#0  0x00007ffff56eb8f4 in do_futex_wait.constprop () at /usr/lib/libpthread.so.0
#1  0x00007ffff56eb9f8 in __new_sem_wait_slow.constprop.0 () at /usr/lib/libpthread.so.0
#2  0x00007ffff7ae1a99 in ARDOUR::RTTaskList::run() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff7ae1dda in ARDOUR::RTTaskList::_thread_run(void*) () at /usr/lib/ardour6/libardour.so.3
#4  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 33 (Thread 0x7fffcb119bc0 (LWP 30794)):
#0  0x00007ffff56eb8f4 in do_futex_wait.constprop () at /usr/lib/libpthread.so.0
#1  0x00007ffff56eb9f8 in __new_sem_wait_slow.constprop.0 () at /usr/lib/libpthread.so.0
#2  0x00007ffff7ae1a99 in ARDOUR::RTTaskList::run() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff7ae1dda in ARDOUR::RTTaskList::_thread_run(void*) () at /usr/lib/ardour6/libardour.so.3
#4  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 32 (Thread 0x7fffcb125bc0 (LWP 30793)):
#0  0x00007ffff56eb8f4 in do_futex_wait.constprop () at /usr/lib/libpthread.so.0
#1  0x00007ffff56eb9f8 in __new_sem_wait_slow.constprop.0 () at /usr/lib/libpthread.so.0
#2  0x00007ffff7ae1a99 in ARDOUR::RTTaskList::run() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff7ae1dda in ARDOUR::RTTaskList::_thread_run(void*) () at /usr/lib/ardour6/libardour.so.3
#4  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 31 (Thread 0x7fffcb131bc0 (LWP 30792)):
#0  0x00007ffff56eb8f4 in do_futex_wait.constprop () at /usr/lib/libpthread.so.0
#1  0x00007ffff56eb9f8 in __new_sem_wait_slow.constprop.0 () at /usr/lib/libpthread.so.0
#2  0x00007ffff7ae1a99 in ARDOUR::RTTaskList::run() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff7ae1dda in ARDOUR::RTTaskList::_thread_run(void*) () at /usr/lib/ardour6/libardour.so.3
#4  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 30 (Thread 0x7fffcb13dbc0 (LWP 30791)):
#0  0x00007ffff56eb8f4 in do_futex_wait.constprop () at /usr/lib/libpthread.so.0
#1  0x00007ffff56eb9f8 in __new_sem_wait_slow.constprop.0 () at /usr/lib/libpthread.so.0
#2  0x00007ffff7ae1a99 in ARDOUR::RTTaskList::run() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff7ae1dda in ARDOUR::RTTaskList::_thread_run(void*) () at /usr/lib/ardour6/libardour.so.3
#4  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 29 (Thread 0x7fffcb45ebc0 (LWP 30790)):
#0  0x00007ffff56eb8f4 in do_futex_wait.constprop () at /usr/lib/libpthread.so.0
#1  0x00007ffff56eb9f8 in __new_sem_wait_slow.constprop.0 () at /usr/lib/libpthread.so.0
#2  0x00007ffff7ae1a99 in ARDOUR::RTTaskList::run() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff7ae1dda in ARDOUR::RTTaskList::_thread_run(void*) () at /usr/lib/ardour6/libardour.so.3
#4  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 22 (Thread 0x7fff9ffff700 (LWP 30745)):
#0  0x00007ffff4cfd05f in poll () at /usr/lib/libc.so.6
#1  0x00007fffe534215e in ARDOUR::AlsaAudioBackend::midi_device_thread() () at /usr/lib/ardour6/backends/libalsa_audiobackend.so
#2  0x00007fffe534222a in ARDOUR::AlsaAudioBackend::_midi_device_thread(void*) () at /usr/lib/ardour6/backends/libalsa_audiobackend.so
#3  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 21 (Thread 0x7fffcb7fdbc0 (LWP 30744)):
#0  0x00007ffff4cfd15e in ppoll () at /usr/lib/libc.so.6
#1  0x00007fffe535db56 in Alsa_pcmi::pcm_wait() () at /usr/lib/ardour6/backends/libalsa_audiobackend.so
#2  0x00007fffe5346327 in ARDOUR::AlsaAudioBackend::main_process_thread() () at /usr/lib/ardour6/backends/libalsa_audiobackend.so
#3  0x00007fffe534752a in  () at /usr/lib/ardour6/backends/libalsa_audiobackend.so
#4  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 20 (Thread 0x7fffcaffd700 (LWP 30743)):
#0  0x00007ffff4cff4fb in select () at /usr/lib/libc.so.6
#1  0x00007ffff6ec2c07 in PBD::SystemExec::output_interposer() () at /usr/lib/ardour6/libpbd.so.4
#2  0x00007ffff6ec2d5a in  () at /usr/lib/ardour6/libpbd.so.4
#3  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 11 (Thread 0x7fffcbfff700 (LWP 30733)):
#0  0x00007ffff4cfd05f in poll () at /usr/lib/libc.so.6
#1  0x00007ffff6b35f38 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007ffff6ae6c03 in g_main_loop_run () at /usr/lib/libglib-2.0.so.0
#3  0x00007ffff63441a8 in  () at /usr/lib/libgio-2.0.so.0
#4  0x00007ffff6b10511 in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 10 (Thread 0x7fffe490e700 (LWP 30732)):
#0  0x00007ffff4cfd05f in poll () at /usr/lib/libc.so.6
#1  0x00007ffff6b35f38 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007ffff6ae7221 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007ffff6ae7272 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007ffff6b10511 in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7fffe5fad700 (LWP 30730)):
#0  0x00007ffff4d0271d in syscall () at /usr/lib/libc.so.6
#1  0x00007ffff6b30101 in g_cond_wait () at /usr/lib/libglib-2.0.so.0
#2  0x00007ffff7619606 in ARDOUR::AudioEngine::do_devicelist_update() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff6c63d7a in  () at /usr/lib/libglibmm-2.4.so.1
#4  0x00007ffff6b10511 in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7fffe69cc700 (LWP 30729)):
#0  0x00007ffff4d0271d in syscall () at /usr/lib/libc.so.6
#1  0x00007ffff6b30101 in g_cond_wait () at /usr/lib/libglib-2.0.so.0
#2  0x00007ffff761a010 in ARDOUR::AudioEngine::do_reset_backend() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff6c63d7a in  () at /usr/lib/libglibmm-2.4.so.1
#4  0x00007ffff6b10511 in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7fffe77fe700 (LWP 30727)):
#0  0x00007ffff4d0271d in syscall () at /usr/lib/libc.so.6
#1  0x00007ffff6b30101 in g_cond_wait () at /usr/lib/libglib-2.0.so.0
#2  0x00007ffff75d5850 in ARDOUR::Analyser::work() () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff6c63d7a in  () at /usr/lib/libglibmm-2.4.so.1
#4  0x00007ffff6b10511 in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7fffe7fff700 (LWP 30726)):
#0  0x00007ffff4d0271d in syscall () at /usr/lib/libc.so.6
#1  0x00007ffff6b30101 in g_cond_wait () at /usr/lib/libglib-2.0.so.0
#2  0x00007ffff7bef9a0 in  () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff6c63d7a in  () at /usr/lib/libglibmm-2.4.so.1
#4  0x00007ffff6b10511 in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7fffec99d700 (LWP 30725)):
#0  0x00007ffff4d0271d in syscall () at /usr/lib/libc.so.6
#1  0x00007ffff6b30101 in g_cond_wait () at /usr/lib/libglib-2.0.so.0
#2  0x00007ffff7bef9a0 in  () at /usr/lib/ardour6/libardour.so.3
#3  0x00007ffff6c63d7a in  () at /usr/lib/libglibmm-2.4.so.1
#4  0x00007ffff6b10511 in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7fffed19e700 (LWP 30724)):
#0  0x00007ffff4ccf571 in clock_nanosleep@GLIBC_2.2.5 () at /usr/lib/libc.so.6
#1  0x00007ffff4cd4e87 in nanosleep () at /usr/lib/libc.so.6
#2  0x00007ffff6b0df31 in g_usleep () at /usr/lib/libglib-2.0.so.0
#3  0x000055555637ffcd in  ()
#4  0x00007ffff56e2422 in start_thread () at /usr/lib/libpthread.so.0
#5  0x00007ffff4d07bf3 in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7fffed54bbc0 (LWP 30720)):
#0  0x00007ffff4cd4c3f in wait4 () at /usr/lib/libc.so.6
#1  0x00007ffff6ec1409 in PBD::SystemExec::wait(int) () at /usr/lib/ardour6/libpbd.so.4
#2  0x00005555561b4b33 in  ()
#3  0x00005555561b4bb5 in  ()
#4  0x00007ffff6f5f1d3 in AbstractUI<Gtkmm2ext::UIRequest>::handle_ui_requests() () at /usr/lib/ardour6/libgtkmm2ext.so.0
#5  0x00007ffff6e7f7bf in BaseUI::request_handler(Glib::IOCondition) () at /usr/lib/ardour6/libpbd.so.4
#6  0x00007ffff6e8ab07 in cross_thread_channel_call_receive_slot(_GIOChannel*, GIOCondition, void*) () at /usr/lib/ardour6/libpbd.so.4
#7  0x00007ffff6ae8340 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#8  0x00007ffff6b35fa9 in  () at /usr/lib/libglib-2.0.so.0
#9  0x00007ffff6ae6c03 in g_main_loop_run () at /usr/lib/libglib-2.0.so.0
#10 0x00007ffff676db7e in gtk_main () at /usr/lib/libgtk-x11-2.0.so.0
#11 0x00007ffff6f56ff9 in Gtkmm2ext::UI::run(Receiver&) () at /usr/lib/ardour6/libgtkmm2ext.so.0
#12 0x00005555559f8076 in  ()
#13 0x00007ffff4c2f002 in __libc_start_main () at /usr/lib/libc.so.6
#14 0x00005555559fd0be in  ()
Currently logging to "ardour.log".
Logs will be appended to the log file.
Output will be logged and displayed.
Debug output will be logged and displayed.