/usr/include/c++/12.2.1/bits/stl_vector.h:1206: std::vector<_Tp, _Alloc>::reference std::vector<_Tp, _Alloc>::front() [with _Tp = std::__cxx11::basic_string<char>; _Alloc = std::allocator<std::__cxx11::basic_string<char> >; reference = std::__cxx11::basic_string<char>&]: Assertion '!this->empty()' failed.

Thread 1 "ArdourGUI" received signal SIGABRT, Aborted.
__pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44
Downloading source file /usr/src/debug/glibc/glibc/nptl/pthread_kill.c
[###                                                                                                                                                                                                                                                                                                                                                                 44	     return INTERNAL_SYSCALL_ERROR_P (ret) ? INTERNAL_SYSCALL_ERRNO (ret) : 0;
(gdb) thread apply all bt

Thread 314 (Thread 0x7fff1ffff6c0 (LWP 205988) "JUCE Timer"):
#0  0x00007ffff53a0f0e in __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x7fff1fffeb00, op=137, expected=0, futex_word=0x55562c6a4bbc) at futex-internal.c:57
#1  __futex_abstimed_wait_common (futex_word=futex_word@entry=0x55562c6a4bbc, expected=expected@entry=0, clockid=clockid@entry=1, abstime=abstime@entry=0x7fff1fffeb00, private=private@entry=0, cancel=cancel@entry=true) at futex-internal.c:87
#2  0x00007ffff53a0f8f in __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x55562c6a4bbc, expected=expected@entry=0, clockid=clockid@entry=1, abstime=abstime@entry=0x7fff1fffeb00, private=private@entry=0) at futex-internal.c:139
#3  0x00007ffff53a3d85 in __pthread_cond_wait_common (abstime=<optimized out>, clockid=<optimized out>, mutex=0x55562c6a4b68, cond=0x55562c6a4b90) at pthread_cond_wait.c:503
#4  ___pthread_cond_clockwait64 (abstime=<optimized out>, clockid=<optimized out>, mutex=0x55562c6a4b68, cond=0x55562c6a4b90) at pthread_cond_wait.c:682
#5  ___pthread_cond_clockwait64 (cond=0x55562c6a4b90, mutex=0x55562c6a4b68, clockid=<optimized out>, abstime=<optimized out>) at pthread_cond_wait.c:670
#6  0x00007fff49943d89 in  () at /usr/lib/vst3/LibreArp.vst3/Contents/x86_64-linux/LibreArp.so
#7  0x00007fff498f4a14 in  () at /usr/lib/vst3/LibreArp.vst3/Contents/x86_64-linux/LibreArp.so
#8  0x00007fff49943fef in  () at /usr/lib/vst3/LibreArp.vst3/Contents/x86_64-linux/LibreArp.so
#9  0x00007fff499440fd in  () at /usr/lib/vst3/LibreArp.vst3/Contents/x86_64-linux/LibreArp.so
#10 0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#11 0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 307 (Thread 0x7fff2d7fa6c0 (LWP 205977) "AutomationWatch"):
#0  0x00007ffff53ec9e5 in __GI___clock_nanosleep (clock_id=clock_id@entry=0, flags=flags@entry=0, req=req@entry=0x7fff2d7f9b40, rem=rem@entry=0x7fff2d7f9b30) at ../sysdeps/unix/sysv/linux/clock_nanosleep.c:48
#1  0x00007ffff53f15e7 in __GI___nanosleep (req=req@entry=0x7fff2d7f9b40, rem=rem@entry=0x7fff2d7f9b30) at ../sysdeps/unix/sysv/linux/nanosleep.c:25
#2  0x00007ffff6cf9111 in g_usleep (microseconds=<optimized out>) at ../glib/glib/gtimer.c:279
#3  0x00007ffff75e9dc6 in ARDOUR::AutomationWatch::thread() (this=0x55555c65b1d0) at ../libs/ardour/automation_watch.cc:207
#4  0x00007ffff6f8090a in boost::function0<void>::operator()() const (this=0x555618a9ebf8) at /usr/include/boost/function/function_template.hpp:763
#5  PBD::Thread::_run(void*) (arg=0x555618a9ebd0) at ../libs/pbd/pthread_utils.cc:488
#6  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#7  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 306 (Thread 0x7fff2dffb6c0 (LWP 205976) "autoconnect"):
#0  0x00007ffff53a0f0e in __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x555558bfd080) at futex-internal.c:57
#1  __futex_abstimed_wait_common (futex_word=futex_word@entry=0x555558bfd080, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0, cancel=cancel@entry=true) at futex-internal.c:87
#2  0x00007ffff53a0f8f in __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x555558bfd080, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at futex-internal.c:139
#3  0x00007ffff53a37a0 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x555558bfd030, cond=0x555558bfd058) at pthread_cond_wait.c:503
#4  ___pthread_cond_wait (cond=0x555558bfd058, mutex=0x555558bfd030) at pthread_cond_wait.c:618
#5  0x00007ffff789c5df in ARDOUR::Session::auto_connect_thread_run() (this=0x555558bfaf70) at ../libs/ardour/session.cc:7494
#6  0x00007ffff789ca3e in ARDOUR::Session::auto_connect_thread(void*) (arg=0x555558bfaf70) at ../libs/ardour/session.cc:7425
#7  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#8  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 305 (Thread 0x7fff2e7fc6c0 (LWP 205975) "SessionSignals"):
#0  0x00007ffff53a0f0e in __futex_abstimed_wait_common64 (private=0, cancel=true, abstime=0x0, op=393, expected=0, futex_word=0x555558bfd014) at futex-internal.c:57
#1  __futex_abstimed_wait_common (futex_word=futex_word@entry=0x555558bfd014, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0, cancel=cancel@entry=true) at futex-internal.c:87
#2  0x00007ffff53a0f8f in __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x555558bfd014, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at futex-internal.c:139
#3  0x00007ffff53a37a0 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x555558bfcfc0, cond=0x555558bfcfe8) at pthread_cond_wait.c:503
#4  ___pthread_cond_wait (cond=0x555558bfcfe8, mutex=0x555558bfcfc0) at pthread_cond_wait.c:618
#5  0x00007ffff78cfb15 in ARDOUR::Session::emit_thread_run() (this=0x555558bfaf70) at ../libs/ardour/session_process.cc:1232
#6  0x00007ffff78cfb4e in ARDOUR::Session::emit_thread(void*) (arg=0x555558bfaf70) at ../libs/ardour/session_process.cc:1221
#7  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#8  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 304 (Thread 0x7fff2effd6c0 (LWP 205974) "Generic MIDI"):
#0  0x00007ffff541ac0f in __GI___poll (fds=0x7ffee0059d00, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007ffff6d28a9f in g_main_context_poll (priority=<optimized out>, n_fds=2, fds=0x7ffee0059d00, timeout=<optimized out>, context=0x555617f7be30) at ../glib/glib/gmain.c:4584
#2  g_main_context_iterate.isra.0 (context=0x555617f7be30, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/glib/gmain.c:4271
#3  0x00007ffff6ccaf3f in g_main_loop_run (loop=0x555617f8d520) at ../glib/glib/gmain.c:4479
#4  0x00007ffff6f8090a in boost::function0<void>::operator()() const (this=0x555617f856d8) at /usr/include/boost/function/function_template.hpp:763
#5  PBD::Thread::_run(void*) (arg=0x555617f856b0) at ../libs/pbd/pthread_utils.cc:488
#6  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#7  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 303 (Thread 0x7fff2f7fe6c0 (LWP 205973) "LV2Worker"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
--Type <RET> for more, q to quit, c to continue without paging--c
#1  0x00007ffff6f8263b in PBD::Semaphore::wait() (this=0x55561041e7a0) at ../libs/pbd/semutils.cc:120
#2  PBD::Semaphore::wait() (this=this@entry=0x55561041e7a0) at ../libs/pbd/semutils.cc:117
#3  0x00007ffff796b1ae in ARDOUR::Worker::run() (this=0x55561041e780) at ../libs/ardour/worker.cc:145
#4  0x00007ffff6f8090a in boost::function0<void>::operator()() const (this=0x5556106df588) at /usr/include/boost/function/function_template.hpp:763
#5  PBD::Thread::_run(void*) (arg=0x5556106df560) at ../libs/pbd/pthread_utils.cc:488
#6  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#7  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 302 (Thread 0x7fff2ffff6c0 (LWP 205972) "LV2Worker"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6f8263b in PBD::Semaphore::wait() (this=0x5556103be360) at ../libs/pbd/semutils.cc:120
#2  PBD::Semaphore::wait() (this=this@entry=0x5556103be360) at ../libs/pbd/semutils.cc:117
#3  0x00007ffff796b1ae in ARDOUR::Worker::run() (this=0x5556103be340) at ../libs/ardour/worker.cc:145
#4  0x00007ffff6f8090a in boost::function0<void>::operator()() const (this=0x55561041e7e8) at /usr/include/boost/function/function_template.hpp:763
#5  PBD::Thread::_run(void*) (arg=0x55561041e7c0) at ../libs/pbd/pthread_utils.cc:488
#6  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#7  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 301 (Thread 0x7fff34bfb6c0 (LWP 205971) "LV2Worker"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6f8263b in PBD::Semaphore::wait() (this=0x55560fb20530) at ../libs/pbd/semutils.cc:120
#2  PBD::Semaphore::wait() (this=this@entry=0x55560fb20530) at ../libs/pbd/semutils.cc:117
#3  0x00007ffff796b08b in ARDOUR::Worker::run() (this=0x55560fb20510) at ../libs/ardour/worker.cc:145
#4  0x00007ffff6f8090a in boost::function0<void>::operator()() const (this=0x55560fb807a8) at /usr/include/boost/function/function_template.hpp:763
#5  PBD::Thread::_run(void*) (arg=0x55560fb80780) at ../libs/pbd/pthread_utils.cc:488
#6  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#7  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 300 (Thread 0x7fff353fc6c0 (LWP 205970) "LV2Worker"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6f8263b in PBD::Semaphore::wait() (this=0x55560d5bab70) at ../libs/pbd/semutils.cc:120
#2  PBD::Semaphore::wait() (this=this@entry=0x55560d5bab70) at ../libs/pbd/semutils.cc:117
#3  0x00007ffff796b08b in ARDOUR::Worker::run() (this=0x55560d5bab50) at ../libs/ardour/worker.cc:145
#4  0x00007ffff6f8090a in boost::function0<void>::operator()() const (this=0x55560d645238) at /usr/include/boost/function/function_template.hpp:763
#5  PBD::Thread::_run(void*) (arg=0x55560d645210) at ../libs/pbd/pthread_utils.cc:488
#6  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#7  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 299 (Thread 0x7fff35bfd6c0 (LWP 205969) "LV2Worker"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6f8263b in PBD::Semaphore::wait() (this=0x5555f8dd6830) at ../libs/pbd/semutils.cc:120
#2  PBD::Semaphore::wait() (this=this@entry=0x5555f8dd6830) at ../libs/pbd/semutils.cc:117
#3  0x00007ffff796b08b in ARDOUR::Worker::run() (this=0x5555f8dd6810) at ../libs/ardour/worker.cc:145
#4  0x00007ffff6f8090a in boost::function0<void>::operator()() const (this=0x5555f8e36aa8) at /usr/include/boost/function/function_template.hpp:763
#5  PBD::Thread::_run(void*) (arg=0x5555f8e36a80) at ../libs/pbd/pthread_utils.cc:488
#6  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#7  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 298 (Thread 0x7fff363fe6c0 (LWP 205968) "LV2Worker"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6f8263b in PBD::Semaphore::wait() (this=0x5555f7565270) at ../libs/pbd/semutils.cc:120
#2  PBD::Semaphore::wait() (this=this@entry=0x5555f7565270) at ../libs/pbd/semutils.cc:117
#3  0x00007ffff796b08b in ARDOUR::Worker::run() (this=0x5555f7565250) at ../libs/ardour/worker.cc:145
#4  0x00007ffff6f8090a in boost::function0<void>::operator()() const (this=0x5555f75c54e8) at /usr/include/boost/function/function_template.hpp:763
#5  PBD::Thread::_run(void*) (arg=0x5555f75c54c0) at ../libs/pbd/pthread_utils.cc:488
#6  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#7  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 297 (Thread 0x7fff36bff6c0 (LWP 205967) "LV2Worker"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6f8263b in PBD::Semaphore::wait() (this=0x5555f6e10230) at ../libs/pbd/semutils.cc:120
#2  PBD::Semaphore::wait() (this=this@entry=0x5555f6e10230) at ../libs/pbd/semutils.cc:117
#3  0x00007ffff796b08b in ARDOUR::Worker::run() (this=0x5555f6e10210) at ../libs/ardour/worker.cc:145
#4  0x00007ffff6f8090a in boost::function0<void>::operator()() const (this=0x5555f6e11998) at /usr/include/boost/function/function_template.hpp:763
#5  PBD::Thread::_run(void*) (arg=0x5555f6e11970) at ../libs/pbd/pthread_utils.cc:488
#6  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#7  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 177 (Thread 0x7fff377fe6c0 (LWP 205843) "LV2Worker"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6f8263b in PBD::Semaphore::wait() (this=0x5555d9a4e2f0) at ../libs/pbd/semutils.cc:120
#2  PBD::Semaphore::wait() (this=this@entry=0x5555d9a4e2f0) at ../libs/pbd/semutils.cc:117
#3  0x00007ffff796b08b in ARDOUR::Worker::run() (this=0x5555d9a4e2d0) at ../libs/ardour/worker.cc:145
#4  0x00007ffff6f8090a in boost::function0<void>::operator()() const (this=0x5555d9a4e298) at /usr/include/boost/function/function_template.hpp:763
#5  PBD::Thread::_run(void*) (arg=0x5555d9a4e270) at ../libs/pbd/pthread_utils.cc:488
#6  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#7  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 176 (Thread 0x7fff37fff6c0 (LWP 205842) "LV2Worker"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6f8263b in PBD::Semaphore::wait() (this=0x5555ce67df80) at ../libs/pbd/semutils.cc:120
#2  PBD::Semaphore::wait() (this=this@entry=0x5555ce67df80) at ../libs/pbd/semutils.cc:117
#3  0x00007ffff796b1ae in ARDOUR::Worker::run() (this=0x5555ce67df60) at ../libs/ardour/worker.cc:145
#4  0x00007ffff6f8090a in boost::function0<void>::operator()() const (this=0x5555ce732238) at /usr/include/boost/function/function_template.hpp:763
#5  PBD::Thread::_run(void*) (arg=0x5555ce732210) at ../libs/pbd/pthread_utils.cc:488
#6  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#7  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 175 (Thread 0x7fff48dfe6c0 (LWP 205841) "LV2Worker"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6f8263b in PBD::Semaphore::wait() (this=0x5555ce411450) at ../libs/pbd/semutils.cc:120
#2  PBD::Semaphore::wait() (this=this@entry=0x5555ce411450) at ../libs/pbd/semutils.cc:117
#3  0x00007ffff796b1ae in ARDOUR::Worker::run() (this=0x5555ce411430) at ../libs/ardour/worker.cc:145
#4  0x00007ffff6f8090a in boost::function0<void>::operator()() const (this=0x5555ce471888) at /usr/include/boost/function/function_template.hpp:763
#5  PBD::Thread::_run(void*) (arg=0x5555ce471860) at ../libs/pbd/pthread_utils.cc:488
#6  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#7  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 174 (Thread 0x7fff495ff6c0 (LWP 205840) "LV2Worker"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6f8263b in PBD::Semaphore::wait() (this=0x5555cd7133a0) at ../libs/pbd/semutils.cc:120
#2  PBD::Semaphore::wait() (this=this@entry=0x5555cd7133a0) at ../libs/pbd/semutils.cc:117
#3  0x00007ffff796b1ae in ARDOUR::Worker::run() (this=0x5555cd713380) at ../libs/ardour/worker.cc:145
#4  0x00007ffff6f8090a in boost::function0<void>::operator()() const (this=0x5555cd7cf558) at /usr/include/boost/function/function_template.hpp:763
#5  PBD::Thread::_run(void*) (arg=0x5555cd7cf530) at ../libs/pbd/pthread_utils.cc:488
#6  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#7  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 173 (Thread 0x7fff4a3fe6c0 (LWP 205839) "LV2Worker"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6f8263b in PBD::Semaphore::wait() (this=0x5555cd4a8ec0) at ../libs/pbd/semutils.cc:120
#2  PBD::Semaphore::wait() (this=this@entry=0x5555cd4a8ec0) at ../libs/pbd/semutils.cc:117
#3  0x00007ffff796b1ae in ARDOUR::Worker::run() (this=0x5555cd4a8ea0) at ../libs/ardour/worker.cc:145
#4  0x00007ffff6f8090a in boost::function0<void>::operator()() const (this=0x5555cd496ae8) at /usr/include/boost/function/function_template.hpp:763
#5  PBD::Thread::_run(void*) (arg=0x5555cd496ac0) at ../libs/pbd/pthread_utils.cc:488
#6  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#7  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 172 (Thread 0x7fff4abff6c0 (LWP 205838) "ArdourGUI"):
#0  0x00007ffff53ec9e5 in __GI___clock_nanosleep (clock_id=clock_id@entry=0, flags=flags@entry=0, req=0x7fff4abfeb60, rem=0x0) at ../sysdeps/unix/sysv/linux/clock_nanosleep.c:48
#1  0x00007ffff53f15e7 in __GI___nanosleep (req=<optimized out>, rem=<optimized out>) at ../sysdeps/unix/sysv/linux/nanosleep.c:25
#2  0x00007fff49924cb5 in  () at /usr/lib/vst3/LibreArp.vst3/Contents/x86_64-linux/LibreArp.so
#3  0x00007fff496c0276 in  () at /usr/lib/vst3/LibreArp.vst3/Contents/x86_64-linux/LibreArp.so
#4  0x00007ffff56e1943 in std::execute_native_thread_routine(void*) (__p=0x5555ccca7090) at /usr/src/debug/gcc/gcc/libstdc++-v3/src/c++11/thread.cc:104
#5  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#6  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 154 (Thread 0x7fff4b7fe6c0 (LWP 205820) "LV2Worker"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6f8263b in PBD::Semaphore::wait() (this=0x5555c02a66c0) at ../libs/pbd/semutils.cc:120
#2  PBD::Semaphore::wait() (this=this@entry=0x5555c02a66c0) at ../libs/pbd/semutils.cc:117
#3  0x00007ffff796b08b in ARDOUR::Worker::run() (this=0x5555c02a66a0) at ../libs/ardour/worker.cc:145
#4  0x00007ffff6f8090a in boost::function0<void>::operator()() const (this=0x5555c0269768) at /usr/include/boost/function/function_template.hpp:763
#5  PBD::Thread::_run(void*) (arg=0x5555c0269740) at ../libs/pbd/pthread_utils.cc:488
#6  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#7  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 153 (Thread 0x7fff4bfff6c0 (LWP 205819) "ArdourGUI"):
#0  futex_wait (val=72, addr=0x5555bff11964) at /usr/src/debug/gcc/gcc/libgomp/config/linux/x86/futex.h:97
#1  do_wait (val=72, addr=<optimized out>) at /usr/src/debug/gcc/gcc/libgomp/config/linux/wait.h:67
#2  gomp_barrier_wait_end (bar=0x5555bff11960, state=72) at /usr/src/debug/gcc/gcc/libgomp/config/linux/bar.c:48
#3  0x00007ffff39c6c70 in gomp_simple_barrier_wait (bar=0x5555bff11960) at /usr/src/debug/gcc/gcc/libgomp/config/posix/simple-bar.h:60
#4  gomp_thread_start (xdata=<optimized out>) at /usr/src/debug/gcc/gcc/libgomp/team.c:133
#5  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#6  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 152 (Thread 0x7fff50a2d6c0 (LWP 205818) "ArdourGUI"):
#0  futex_wait (val=72, addr=0x5555bff11964) at /usr/src/debug/gcc/gcc/libgomp/config/linux/x86/futex.h:97
#1  do_wait (val=72, addr=<optimized out>) at /usr/src/debug/gcc/gcc/libgomp/config/linux/wait.h:67
#2  gomp_barrier_wait_end (bar=0x5555bff11960, state=72) at /usr/src/debug/gcc/gcc/libgomp/config/linux/bar.c:48
#3  0x00007ffff39c6c70 in gomp_simple_barrier_wait (bar=0x5555bff11960) at /usr/src/debug/gcc/gcc/libgomp/config/posix/simple-bar.h:60
#4  gomp_thread_start (xdata=<optimized out>) at /usr/src/debug/gcc/gcc/libgomp/team.c:133
#5  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#6  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 151 (Thread 0x7fff5122e6c0 (LWP 205817) "ArdourGUI"):
#0  futex_wait (val=72, addr=0x5555bff11964) at /usr/src/debug/gcc/gcc/libgomp/config/linux/x86/futex.h:97
#1  do_wait (val=72, addr=<optimized out>) at /usr/src/debug/gcc/gcc/libgomp/config/linux/wait.h:67
#2  gomp_barrier_wait_end (bar=0x5555bff11960, state=72) at /usr/src/debug/gcc/gcc/libgomp/config/linux/bar.c:48
#3  0x00007ffff39c6c70 in gomp_simple_barrier_wait (bar=0x5555bff11960) at /usr/src/debug/gcc/gcc/libgomp/config/posix/simple-bar.h:60
#4  gomp_thread_start (xdata=<optimized out>) at /usr/src/debug/gcc/gcc/libgomp/team.c:133
#5  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#6  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 150 (Thread 0x7fff51a2f6c0 (LWP 205816) "ArdourGUI"):
#0  futex_wait (val=72, addr=0x5555bff11964) at /usr/src/debug/gcc/gcc/libgomp/config/linux/x86/futex.h:97
#1  do_wait (val=72, addr=<optimized out>) at /usr/src/debug/gcc/gcc/libgomp/config/linux/wait.h:67
#2  gomp_barrier_wait_end (bar=0x5555bff11960, state=72) at /usr/src/debug/gcc/gcc/libgomp/config/linux/bar.c:48
#3  0x00007ffff39c6c70 in gomp_simple_barrier_wait (bar=0x5555bff11960) at /usr/src/debug/gcc/gcc/libgomp/config/posix/simple-bar.h:60
#4  gomp_thread_start (xdata=<optimized out>) at /usr/src/debug/gcc/gcc/libgomp/team.c:133
#5  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#6  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 149 (Thread 0x7fff522306c0 (LWP 205815) "ArdourGUI"):
#0  futex_wait (val=72, addr=0x5555bff11964) at /usr/src/debug/gcc/gcc/libgomp/config/linux/x86/futex.h:97
#1  do_wait (val=72, addr=<optimized out>) at /usr/src/debug/gcc/gcc/libgomp/config/linux/wait.h:67
#2  gomp_barrier_wait_end (bar=0x5555bff11960, state=72) at /usr/src/debug/gcc/gcc/libgomp/config/linux/bar.c:48
#3  0x00007ffff39c6c70 in gomp_simple_barrier_wait (bar=0x5555bff11960) at /usr/src/debug/gcc/gcc/libgomp/config/posix/simple-bar.h:60
#4  gomp_thread_start (xdata=<optimized out>) at /usr/src/debug/gcc/gcc/libgomp/team.c:133
#5  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#6  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 148 (Thread 0x7fff58bff6c0 (LWP 205814) "ArdourGUI"):
#0  futex_wait (val=72, addr=0x5555bff11964) at /usr/src/debug/gcc/gcc/libgomp/config/linux/x86/futex.h:97
#1  do_wait (val=72, addr=<optimized out>) at /usr/src/debug/gcc/gcc/libgomp/config/linux/wait.h:67
#2  gomp_barrier_wait_end (bar=0x5555bff11960, state=72) at /usr/src/debug/gcc/gcc/libgomp/config/linux/bar.c:48
#3  0x00007ffff39c6c70 in gomp_simple_barrier_wait (bar=0x5555bff11960) at /usr/src/debug/gcc/gcc/libgomp/config/posix/simple-bar.h:60
#4  gomp_thread_start (xdata=<optimized out>) at /usr/src/debug/gcc/gcc/libgomp/team.c:133
#5  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#6  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 147 (Thread 0x7fff5bfff6c0 (LWP 205813) "ArdourGUI"):
#0  futex_wait (val=72, addr=0x5555bff11964) at /usr/src/debug/gcc/gcc/libgomp/config/linux/x86/futex.h:97
#1  do_wait (val=72, addr=<optimized out>) at /usr/src/debug/gcc/gcc/libgomp/config/linux/wait.h:67
#2  gomp_barrier_wait_end (bar=0x5555bff11960, state=72) at /usr/src/debug/gcc/gcc/libgomp/config/linux/bar.c:48
#3  0x00007ffff39c6c70 in gomp_simple_barrier_wait (bar=0x5555bff11960) at /usr/src/debug/gcc/gcc/libgomp/config/posix/simple-bar.h:60
#4  gomp_thread_start (xdata=<optimized out>) at /usr/src/debug/gcc/gcc/libgomp/team.c:133
#5  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#6  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 146 (Thread 0x7fff5affd6c0 (LWP 205812) "ArdourGUI"):
#0  futex_wait (val=72, addr=0x5555bff11964) at /usr/src/debug/gcc/gcc/libgomp/config/linux/x86/futex.h:97
#1  do_wait (val=72, addr=<optimized out>) at /usr/src/debug/gcc/gcc/libgomp/config/linux/wait.h:67
#2  gomp_barrier_wait_end (bar=0x5555bff11960, state=72) at /usr/src/debug/gcc/gcc/libgomp/config/linux/bar.c:48
#3  0x00007ffff39c6c70 in gomp_simple_barrier_wait (bar=0x5555bff11960) at /usr/src/debug/gcc/gcc/libgomp/config/posix/simple-bar.h:60
#4  gomp_thread_start (xdata=<optimized out>) at /usr/src/debug/gcc/gcc/libgomp/team.c:133
#5  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#6  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 145 (Thread 0x7fff5b7fe6c0 (LWP 205811) "ArdourGUI"):
#0  futex_wait (val=72, addr=0x5555bff11964) at /usr/src/debug/gcc/gcc/libgomp/config/linux/x86/futex.h:97
#1  do_wait (val=72, addr=<optimized out>) at /usr/src/debug/gcc/gcc/libgomp/config/linux/wait.h:67
#2  gomp_barrier_wait_end (bar=0x5555bff11960, state=72) at /usr/src/debug/gcc/gcc/libgomp/config/linux/bar.c:48
#3  0x00007ffff39c6c70 in gomp_simple_barrier_wait (bar=0x5555bff11960) at /usr/src/debug/gcc/gcc/libgomp/config/posix/simple-bar.h:60
#4  gomp_thread_start (xdata=<optimized out>) at /usr/src/debug/gcc/gcc/libgomp/team.c:133
#5  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#6  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 144 (Thread 0x7fffb27fc6c0 (LWP 205810) "ArdourGUI"):
#0  futex_wait (val=72, addr=0x5555bff11964) at /usr/src/debug/gcc/gcc/libgomp/config/linux/x86/futex.h:97
#1  do_wait (val=72, addr=<optimized out>) at /usr/src/debug/gcc/gcc/libgomp/config/linux/wait.h:67
#2  gomp_barrier_wait_end (bar=0x5555bff11960, state=72) at /usr/src/debug/gcc/gcc/libgomp/config/linux/bar.c:48
#3  0x00007ffff39c6c70 in gomp_simple_barrier_wait (bar=0x5555bff11960) at /usr/src/debug/gcc/gcc/libgomp/config/posix/simple-bar.h:60
#4  gomp_thread_start (xdata=<optimized out>) at /usr/src/debug/gcc/gcc/libgomp/team.c:133
#5  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#6  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 143 (Thread 0x7fffb37fe6c0 (LWP 205809) "ArdourGUI"):
#0  futex_wait (val=72, addr=0x5555bff11964) at /usr/src/debug/gcc/gcc/libgomp/config/linux/x86/futex.h:97
#1  do_wait (val=72, addr=<optimized out>) at /usr/src/debug/gcc/gcc/libgomp/config/linux/wait.h:67
#2  gomp_barrier_wait_end (bar=0x5555bff11960, state=72) at /usr/src/debug/gcc/gcc/libgomp/config/linux/bar.c:48
#3  0x00007ffff39c6c70 in gomp_simple_barrier_wait (bar=0x5555bff11960) at /usr/src/debug/gcc/gcc/libgomp/config/posix/simple-bar.h:60
#4  gomp_thread_start (xdata=<optimized out>) at /usr/src/debug/gcc/gcc/libgomp/team.c:133
#5  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#6  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 117 (Thread 0x7fff758ec6c0 (LWP 205446) "LV2Worker"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6f8263b in PBD::Semaphore::wait() (this=0x5555695a6fd0) at ../libs/pbd/semutils.cc:120
#2  PBD::Semaphore::wait() (this=this@entry=0x5555695a6fd0) at ../libs/pbd/semutils.cc:117
#3  0x00007ffff796b08b in ARDOUR::Worker::run() (this=0x5555695a6fb0) at ../libs/ardour/worker.cc:145
#4  0x00007ffff6f8090a in boost::function0<void>::operator()() const (this=0x5555695a6e88) at /usr/include/boost/function/function_template.hpp:763
#5  PBD::Thread::_run(void*) (arg=0x5555695a6e60) at ../libs/pbd/pthread_utils.cc:488
#6  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#7  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 116 (Thread 0x7fff778f06c0 (LWP 205445) "midiUI"):
#0  0x00007ffff541ac0f in __GI___poll (fds=0x7fff64041a60, nfds=4, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007ffff6d28a9f in g_main_context_poll (priority=<optimized out>, n_fds=4, fds=0x7fff64041a60, timeout=<optimized out>, context=0x555566565940) at ../glib/glib/gmain.c:4584
#2  g_main_context_iterate.isra.0 (context=0x555566565940, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/glib/gmain.c:4271
#3  0x00007ffff6ccaf3f in g_main_loop_run (loop=0x555566565ae0) at ../glib/glib/gmain.c:4479
#4  0x00007ffff6f8090a in boost::function0<void>::operator()() const (this=0x555566565ca8) at /usr/include/boost/function/function_template.hpp:763
#5  PBD::Thread::_run(void*) (arg=0x555566565c80) at ../libs/pbd/pthread_utils.cc:488
#6  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#7  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 115 (Thread 0x7fffb00f16c0 (LWP 205444) "butler"):
#0  0x00007ffff541ac0f in __GI___poll (fds=fds@entry=0x7fffb00f0a10, nfds=nfds@entry=1, timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007ffff6f6dbdd in poll (__timeout=-1, __nfds=1, __fds=0x7fffb00f0a10) at /usr/include/bits/poll2.h:39
#2  CrossThreadChannel::poll_for_request() (this=<optimized out>) at ../libs/pbd/crossthread.posix.cc:108
#3  0x00007ffff6f6dc63 in CrossThreadChannel::receive(char&, bool) (this=this@entry=0x5555573e2728, msg=@0x7fffb00f0ad0: 96 '`', wait=wait@entry=true) at ../libs/pbd/crossthread.posix.cc:133
#4  0x00007ffff75f866b in ARDOUR::Butler::thread_work() (this=0x5555573e2680) at ../libs/ardour/butler.cc:188
#5  0x00007ffff6f8085a in fake_thread_start(void*) (arg=0x5555664b3870) at ../libs/pbd/pthread_utils.cc:101
#6  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#7  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 114 (Thread 0x7fff917fa6c0 (LWP 205443) "RT-10-(nil)"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6f8263b in PBD::Semaphore::wait() (this=0x5555573c4294) at ../libs/pbd/semutils.cc:120
#2  PBD::Semaphore::wait() (this=this@entry=0x5555573c4294) at ../libs/pbd/semutils.cc:117
#3  0x00007ffff768d02e in ARDOUR::Graph::run_one() (this=this@entry=0x5555573c4160) at ../libs/ardour/graph.cc:320
#4  0x00007ffff7695431 in ARDOUR::Graph::helper_thread() (this=0x5555573c4160) at ../libs/ardour/graph.cc:372
#5  0x00007fffe8a55312 in boost::function0<void>::operator()() const (this=0x7fff917f9b90) at /usr/include/boost/function/function_template.hpp:763
#6  ARDOUR::JACKAudioBackend::_start_process_thread(void*) (arg=<optimized out>) at ../libs/backends/jack/jack_audiobackend.cc:957
#7  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#8  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 113 (Thread 0x7fff91ffb6c0 (LWP 205442) "RT-9-(nil)"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6f8263b in PBD::Semaphore::wait() (this=0x0) at ../libs/pbd/semutils.cc:120
#2  PBD::Semaphore::wait() (this=this@entry=0x5555573c42a0) at ../libs/pbd/semutils.cc:117
#3  0x00007ffff7691f68 in ARDOUR::Graph::reached_terminal_node() (this=<optimized out>) at ../libs/ardour/graph.cc:267
#4  ARDOUR::Graph::reached_terminal_node() (this=0x5555573c4160) at ../libs/ardour/graph.cc:241
#5  0x00007ffff7695431 in ARDOUR::Graph::helper_thread() (this=0x5555573c4160) at ../libs/ardour/graph.cc:372
#6  0x00007fffe8a55312 in boost::function0<void>::operator()() const (this=0x7fff91ffab90) at /usr/include/boost/function/function_template.hpp:763
#7  ARDOUR::JACKAudioBackend::_start_process_thread(void*) (arg=<optimized out>) at ../libs/backends/jack/jack_audiobackend.cc:957
#8  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#9  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 112 (Thread 0x7fff927fc6c0 (LWP 205441) "RT-8-(nil)"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6f8263b in PBD::Semaphore::wait() (this=0x5555573c4294) at ../libs/pbd/semutils.cc:120
#2  PBD::Semaphore::wait() (this=this@entry=0x5555573c4294) at ../libs/pbd/semutils.cc:117
#3  0x00007ffff768d02e in ARDOUR::Graph::run_one() (this=this@entry=0x5555573c4160) at ../libs/ardour/graph.cc:320
#4  0x00007ffff7695431 in ARDOUR::Graph::helper_thread() (this=0x5555573c4160) at ../libs/ardour/graph.cc:372
#5  0x00007fffe8a55312 in boost::function0<void>::operator()() const (this=0x7fff927fbb90) at /usr/include/boost/function/function_template.hpp:763
#6  ARDOUR::JACKAudioBackend::_start_process_thread(void*) (arg=<optimized out>) at ../libs/backends/jack/jack_audiobackend.cc:957
#7  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#8  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 111 (Thread 0x7fff92ffd6c0 (LWP 205440) "RT-7-(nil)"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6f8263b in PBD::Semaphore::wait() (this=0x5555573c4294) at ../libs/pbd/semutils.cc:120
#2  PBD::Semaphore::wait() (this=this@entry=0x5555573c4294) at ../libs/pbd/semutils.cc:117
#3  0x00007ffff768d02e in ARDOUR::Graph::run_one() (this=this@entry=0x5555573c4160) at ../libs/ardour/graph.cc:320
#4  0x00007ffff7695431 in ARDOUR::Graph::helper_thread() (this=0x5555573c4160) at ../libs/ardour/graph.cc:372
#5  0x00007fffe8a55312 in boost::function0<void>::operator()() const (this=0x7fff92ffcb90) at /usr/include/boost/function/function_template.hpp:763
#6  ARDOUR::JACKAudioBackend::_start_process_thread(void*) (arg=<optimized out>) at ../libs/backends/jack/jack_audiobackend.cc:957
#7  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#8  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 110 (Thread 0x7fff937fe6c0 (LWP 205439) "RT-6-(nil)"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6f8263b in PBD::Semaphore::wait() (this=0x5555573c4294) at ../libs/pbd/semutils.cc:120
#2  PBD::Semaphore::wait() (this=this@entry=0x5555573c4294) at ../libs/pbd/semutils.cc:117
#3  0x00007ffff768d02e in ARDOUR::Graph::run_one() (this=this@entry=0x5555573c4160) at ../libs/ardour/graph.cc:320
#4  0x00007ffff7695431 in ARDOUR::Graph::helper_thread() (this=0x5555573c4160) at ../libs/ardour/graph.cc:372
#5  0x00007fffe8a55312 in boost::function0<void>::operator()() const (this=0x7fff937fdb90) at /usr/include/boost/function/function_template.hpp:763
#6  ARDOUR::JACKAudioBackend::_start_process_thread(void*) (arg=<optimized out>) at ../libs/backends/jack/jack_audiobackend.cc:957
#7  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#8  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 109 (Thread 0x7fff93fff6c0 (LWP 205438) "RT-5-(nil)"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6f8263b in PBD::Semaphore::wait() (this=0x5555573c4294) at ../libs/pbd/semutils.cc:120
#2  PBD::Semaphore::wait() (this=this@entry=0x5555573c4294) at ../libs/pbd/semutils.cc:117
#3  0x00007ffff768d02e in ARDOUR::Graph::run_one() (this=this@entry=0x5555573c4160) at ../libs/ardour/graph.cc:320
#4  0x00007ffff7695431 in ARDOUR::Graph::helper_thread() (this=0x5555573c4160) at ../libs/ardour/graph.cc:372
#5  0x00007fffe8a55312 in boost::function0<void>::operator()() const (this=0x7fff93ffeb90) at /usr/include/boost/function/function_template.hpp:763
#6  ARDOUR::JACKAudioBackend::_start_process_thread(void*) (arg=<optimized out>) at ../libs/backends/jack/jack_audiobackend.cc:957
#7  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#8  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 108 (Thread 0x7fffb17fa6c0 (LWP 205437) "RT-4-(nil)"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6f8263b in PBD::Semaphore::wait() (this=0x5555573c4294) at ../libs/pbd/semutils.cc:120
#2  PBD::Semaphore::wait() (this=this@entry=0x5555573c4294) at ../libs/pbd/semutils.cc:117
#3  0x00007ffff768d02e in ARDOUR::Graph::run_one() (this=this@entry=0x5555573c4160) at ../libs/ardour/graph.cc:320
#4  0x00007ffff7695431 in ARDOUR::Graph::helper_thread() (this=0x5555573c4160) at ../libs/ardour/graph.cc:372
#5  0x00007fffe8a55312 in boost::function0<void>::operator()() const (this=0x7fffb17f9b90) at /usr/include/boost/function/function_template.hpp:763
#6  ARDOUR::JACKAudioBackend::_start_process_thread(void*) (arg=<optimized out>) at ../libs/backends/jack/jack_audiobackend.cc:957
#7  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#8  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 107 (Thread 0x7fffb1ffb6c0 (LWP 205436) "RT-3-(nil)"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6f8263b in PBD::Semaphore::wait() (this=0x5555573c4294) at ../libs/pbd/semutils.cc:120
#2  PBD::Semaphore::wait() (this=this@entry=0x5555573c4294) at ../libs/pbd/semutils.cc:117
#3  0x00007ffff768d02e in ARDOUR::Graph::run_one() (this=this@entry=0x5555573c4160) at ../libs/ardour/graph.cc:320
#4  0x00007ffff7695431 in ARDOUR::Graph::helper_thread() (this=0x5555573c4160) at ../libs/ardour/graph.cc:372
#5  0x00007fffe8a55312 in boost::function0<void>::operator()() const (this=0x7fffb1ffab90) at /usr/include/boost/function/function_template.hpp:763
#6  ARDOUR::JACKAudioBackend::_start_process_thread(void*) (arg=<optimized out>) at ../libs/backends/jack/jack_audiobackend.cc:957
#7  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#8  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 106 (Thread 0x7fffc8f686c0 (LWP 205435) "RT-2-(nil)"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6f8263b in PBD::Semaphore::wait() (this=0x5555573c4294) at ../libs/pbd/semutils.cc:120
#2  PBD::Semaphore::wait() (this=this@entry=0x5555573c4294) at ../libs/pbd/semutils.cc:117
#3  0x00007ffff768d02e in ARDOUR::Graph::run_one() (this=this@entry=0x5555573c4160) at ../libs/ardour/graph.cc:320
#4  0x00007ffff7695431 in ARDOUR::Graph::helper_thread() (this=0x5555573c4160) at ../libs/ardour/graph.cc:372
#5  0x00007fffe8a55312 in boost::function0<void>::operator()() const (this=0x7fffc8f67b90) at /usr/include/boost/function/function_template.hpp:763
#6  ARDOUR::JACKAudioBackend::_start_process_thread(void*) (arg=<optimized out>) at ../libs/backends/jack/jack_audiobackend.cc:957
#7  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#8  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 105 (Thread 0x7fffb3fff6c0 (LWP 205434) "RT-1-(nil)"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6f8263b in PBD::Semaphore::wait() (this=0x5555573c4294) at ../libs/pbd/semutils.cc:120
#2  PBD::Semaphore::wait() (this=this@entry=0x5555573c4294) at ../libs/pbd/semutils.cc:117
#3  0x00007ffff768d02e in ARDOUR::Graph::run_one() (this=this@entry=0x5555573c4160) at ../libs/ardour/graph.cc:320
#4  0x00007ffff7695431 in ARDOUR::Graph::helper_thread() (this=0x5555573c4160) at ../libs/ardour/graph.cc:372
#5  0x00007fffe8a55312 in boost::function0<void>::operator()() const (this=0x7fffb3ffeb90) at /usr/include/boost/function/function_template.hpp:763
#6  ARDOUR::JACKAudioBackend::_start_process_thread(void*) (arg=<optimized out>) at ../libs/backends/jack/jack_audiobackend.cc:957
#7  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#8  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 104 (Thread 0x7fffb0ff96c0 (LWP 205433) "RT-main-(nil)"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6f8263b in PBD::Semaphore::wait() (this=0x5555573c4294) at ../libs/pbd/semutils.cc:120
#2  PBD::Semaphore::wait() (this=this@entry=0x5555573c4294) at ../libs/pbd/semutils.cc:117
#3  0x00007ffff768d02e in ARDOUR::Graph::run_one() (this=this@entry=0x5555573c4160) at ../libs/ardour/graph.cc:320
#4  0x00007ffff76952c9 in ARDOUR::Graph::main_thread() (this=0x5555573c4160) at ../libs/ardour/graph.cc:425
#5  0x00007fffe8a55312 in boost::function0<void>::operator()() const (this=0x7fffb0ff8b90) at /usr/include/boost/function/function_template.hpp:763
#6  ARDOUR::JACKAudioBackend::_start_process_thread(void*) (arg=<optimized out>) at ../libs/backends/jack/jack_audiobackend.cc:957
#7  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#8  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 64 (Thread 0x7fffcbfff6c0 (LWP 205367) "AudioEngine 1"):
#0  0x00007ffff5428266 in epoll_wait (epfd=24, events=events@entry=0x7fffcbffe4c0, maxevents=32, timeout=-1) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#1  0x00007ffff6f34c39 in impl_pollfd_wait (object=<optimized out>, pfd=<optimized out>, ev=0x7fffcbffe690, n_ev=<optimized out>, timeout=<optimized out>) at ../pipewire/spa/plugins/support/system.c:137
#2  0x00007ffff6f2723b in loop_iterate_cancel (object=0x555557418828, timeout=-1) at ../pipewire/spa/plugins/support/loop.c:411
#3  0x00007ffff34f39d9 in pw_data_loop_wait (this=0x555557417e30, timeout=timeout@entry=-1) at ../pipewire/src/pipewire/data-loop.c:27
#4  0x00007ffff35ac080 in cycle_wait (c=<optimized out>) at ../pipewire/pipewire-jack/src/pipewire-jack.c:1682
#5  jack_cycle_wait (client=0x555556c92b50) at ../pipewire/pipewire-jack/src/pipewire-jack.c:4169
#6  0x00007fffe8a5c6c4 in ARDOUR::JACKAudioBackend::process_thread() (this=0x555556cdaeb0) at ../libs/backends/jack/jack_audiobackend.cc:986
#7  0x00007ffff6f27365 in loop_iterate_cancel (object=<optimized out>, timeout=<optimized out>) at ../pipewire/spa/plugins/support/loop.c:441
#8  0x00007ffff34f86b2 in do_loop (user_data=0x555557417e30) at ../pipewire/src/pipewire/data-loop.c:65
#9  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#10 0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 63 (Thread 0x7fffc97fa6c0 (LWP 205366) "pw-ardour"):
#0  0x00007ffff5428266 in epoll_wait (epfd=20, events=events@entry=0x7fffc97f97b0, maxevents=32, timeout=-1) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
#1  0x00007ffff6f34c39 in impl_pollfd_wait (object=<optimized out>, pfd=<optimized out>, ev=0x7fffc97f9980, n_ev=<optimized out>, timeout=<optimized out>) at ../pipewire/spa/plugins/support/system.c:137
#2  0x00007ffff6f274fd in loop_iterate (object=0x5555577fec08, timeout=-1) at ../pipewire/spa/plugins/support/loop.c:458
#3  0x00007ffff353be45 in do_loop (user_data=0x555557408820) at ../pipewire/src/pipewire/thread-loop.c:286
#4  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#5  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 61 (Thread 0x7fffb2ffd6c0 (LWP 205362) "threaded-ml"):
#0  0x00007ffff541ac0f in __GI___poll (fds=fds@entry=0x7fffa4001580, nfds=nfds@entry=2, timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007ffff39848c7 in poll (__timeout=-1, __nfds=2, __fds=0x7fffa4001580) at /usr/include/bits/poll2.h:39
#2  poll_func (ufds=0x7fffa4001580, nfds=2, timeout=-1, userdata=0x5555573f5060) at ../pulseaudio/src/pulse/thread-mainloop.c:70
#3  0x00007ffff396e46c in pa_mainloop_poll (m=m@entry=0x555557417440) at ../pulseaudio/src/pulse/mainloop.c:863
#4  0x00007ffff397842c in pa_mainloop_iterate (m=m@entry=0x555557417440, block=block@entry=1, retval=retval@entry=0x0) at ../pulseaudio/src/pulse/mainloop.c:945
#5  0x00007ffff39784e1 in pa_mainloop_run (m=0x555557417440, retval=0x0) at ../pulseaudio/src/pulse/mainloop.c:963
#6  0x00007ffff3988c02 in thread (userdata=0x555557415980) at ../pulseaudio/src/pulse/thread-mainloop.c:101
#7  0x00007ffff2c4bc67 in internal_thread_func (userdata=0x55555877ad60) at ../pulseaudio/src/pulsecore/thread-posix.c:81
#8  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#9  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 19 (Thread 0x7fffca7fc6c0 (LWP 205315) "gdbus"):
#0  0x00007ffff541ac0f in __GI___poll (fds=0x7fffc0000b90, nfds=3, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007ffff6d28a9f in g_main_context_poll (priority=<optimized out>, n_fds=3, fds=0x7fffc0000b90, timeout=<optimized out>, context=0x7fffd2317080) at ../glib/glib/gmain.c:4584
#2  g_main_context_iterate.isra.0 (context=0x7fffd2317080, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/glib/gmain.c:4271
#3  0x00007ffff6ccaf3f in g_main_loop_run (loop=0x7fffd22954d0) at ../glib/glib/gmain.c:4479
#4  0x00007ffff49d428c in gdbus_shared_thread_func (user_data=0x7fffd2e2a0c0) at ../glib/gio/gdbusprivate.c:284
#5  0x00007ffff6cfdcc5 in g_thread_proxy (data=0x7fffd00033b0) at ../glib/glib/gthread.c:831
#6  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#7  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 17 (Thread 0x7fffcb7fe6c0 (LWP 205313) "gmain"):
#0  0x00007ffff541ac0f in __GI___poll (fds=0x555556f44b30, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007ffff6d28a9f in g_main_context_poll (priority=<optimized out>, n_fds=2, fds=0x555556f44b30, timeout=<optimized out>, context=0x555556f40960) at ../glib/glib/gmain.c:4584
#2  g_main_context_iterate.isra.0 (context=context@entry=0x555556f40960, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/glib/gmain.c:4271
#3  0x00007ffff6cc9032 in g_main_context_iteration (context=0x555556f40960, may_block=may_block@entry=1) at ../glib/glib/gmain.c:4343
#4  0x00007ffff6cc9082 in glib_worker_main (data=<optimized out>) at ../glib/glib/gmain.c:6455
#5  0x00007ffff6cfdcc5 in g_thread_proxy (data=0x555556f440f0) at ../glib/glib/gthread.c:831
#6  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#7  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 16 (Thread 0x7fffcaffd6c0 (LWP 205312) "pool-spawner"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6d20b85 in g_cond_wait (cond=0x555556f33d98, mutex=0x555556f33d90) at ../glib/glib/gthread-posix.c:1475
#2  0x00007ffff6c96094 in g_async_queue_pop_intern_unlocked (queue=0x555556f33d90, wait=1, end_time=-1) at ../glib/glib/gasyncqueue.c:425
#3  0x00007ffff6d0024e in g_thread_pool_spawn_thread (data=<optimized out>) at ../glib/glib/gthreadpool.c:311
#4  0x00007ffff6cfdcc5 in g_thread_proxy (data=0x555556f42250) at ../glib/glib/gthread.c:831
#5  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#6  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 9 (Thread 0x7fffe930e6c0 (LWP 205298) "DeviceList"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6d20b85 in g_cond_wait (cond=0x555556e27fe0, mutex=0x555556e27ff0) at ../glib/glib/gthread-posix.c:1475
#2  0x00007ffff75a8a40 in ARDOUR::AudioEngine::do_devicelist_update() (this=0x555556e275a0) at ../libs/ardour/audioengine.cc:754
#3  0x00007ffff6f8090a in boost::function0<void>::operator()() const (this=0x555556e34308) at /usr/include/boost/function/function_template.hpp:763
#4  PBD::Thread::_run(void*) (arg=0x555556e342e0) at ../libs/pbd/pthread_utils.cc:488
#5  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#6  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 8 (Thread 0x7fffe9ffb6c0 (LWP 205297) "EngineWatchdog"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6d20b85 in g_cond_wait (cond=0x555556e27fb0, mutex=0x555556e27fc0) at ../glib/glib/gthread-posix.c:1475
#2  0x00007ffff75a9de9 in ARDOUR::AudioEngine::do_reset_backend() (this=0x555556e275a0) at ../libs/ardour/audioengine.cc:718
#3  0x00007ffff6f8090a in boost::function0<void>::operator()() const (this=0x555556e343c8) at /usr/include/boost/function/function_template.hpp:763
#4  PBD::Thread::_run(void*) (arg=0x555556e343a0) at ../libs/pbd/pthread_utils.cc:488
#5  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#6  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 6 (Thread 0x7fffea7fc6c0 (LWP 205224) "Analyzer"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6d20b85 in g_cond_wait (cond=0x7ffff7e953d0 <ARDOUR::Analyser::SourcesToAnalyse>, mutex=0x7ffff7e953c8 <ARDOUR::Analyser::analysis_queue_lock>) at ../glib/glib/gthread-posix.c:1475
#2  0x00007ffff75875b0 in ARDOUR::Analyser::work() () at ../libs/ardour/analyser.cc:95
#3  0x00007ffff6f8090a in boost::function0<void>::operator()() const (this=0x55555679feb8) at /usr/include/boost/function/function_template.hpp:763
#4  PBD::Thread::_run(void*) (arg=0x55555679fe90) at ../libs/pbd/pthread_utils.cc:488
#5  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#6  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 5 (Thread 0x7fffeaffd6c0 (LWP 205223) "PeakFileBuilder"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6d20b85 in g_cond_wait (cond=0x7ffff7e976e0 <ARDOUR::SourceFactory::PeaksToBuild>, mutex=0x7ffff7e976f8 <ARDOUR::SourceFactory::peak_building_lock>) at ../glib/glib/gthread-posix.c:1475
#2  0x00007ffff7925ca3 in peak_thread_work() () at ../libs/ardour/source_factory.cc:75
#3  0x00007ffff6f8090a in boost::function0<void>::operator()() const (this=0x555556799438) at /usr/include/boost/function/function_template.hpp:763
#4  PBD::Thread::_run(void*) (arg=0x555556799410) at ../libs/pbd/pthread_utils.cc:488
#5  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#6  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 4 (Thread 0x7fffeb7fe6c0 (LWP 205222) "PeakFileBuilder"):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007ffff6d20b85 in g_cond_wait (cond=0x7ffff7e976e0 <ARDOUR::SourceFactory::PeaksToBuild>, mutex=0x7ffff7e976f8 <ARDOUR::SourceFactory::peak_building_lock>) at ../glib/glib/gthread-posix.c:1475
#2  0x00007ffff7925ca3 in peak_thread_work() () at ../libs/ardour/source_factory.cc:75
#3  0x00007ffff6f8090a in boost::function0<void>::operator()() const (this=0x55555679f568) at /usr/include/boost/function/function_template.hpp:763
#4  PBD::Thread::_run(void*) (arg=0x55555679f540) at ../libs/pbd/pthread_utils.cc:488
#5  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#6  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 3 (Thread 0x7fffebfff6c0 (LWP 205221) "LXVSTEventLoop"):
#0  0x00007ffff53ec9e5 in __GI___clock_nanosleep (clock_id=clock_id@entry=0, flags=flags@entry=0, req=req@entry=0x7fffebffe9b0, rem=rem@entry=0x7fffebffe9a0) at ../sysdeps/unix/sysv/linux/clock_nanosleep.c:48
#1  0x00007ffff53f15e7 in __GI___nanosleep (req=req@entry=0x7fffebffe9b0, rem=rem@entry=0x7fffebffe9a0) at ../sysdeps/unix/sysv/linux/nanosleep.c:25
#2  0x00007ffff6cf9111 in g_usleep (microseconds=<optimized out>) at ../glib/glib/gtimer.c:279
#3  0x0000555556225397 in gui_event_loop(void*) (ptr=<optimized out>) at ../gtk2_ardour/linux_vst_gui_support.cc:468
#4  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#5  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 2 (Thread 0x7ffff08696c0 (LWP 205220) "Trigger Worker"):
#0  0x00007ffff541ac0f in __GI___poll (fds=fds@entry=0x7ffff0868ad0, nfds=nfds@entry=1, timeout=timeout@entry=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007ffff6f6dbdd in poll (__timeout=-1, __nfds=1, __fds=0x7ffff0868ad0) at /usr/include/bits/poll2.h:39
#2  CrossThreadChannel::poll_for_request() (this=<optimized out>) at ../libs/pbd/crossthread.posix.cc:108
#3  0x00007ffff6f6dc63 in CrossThreadChannel::receive(char&, bool) (this=this@entry=0x555556769c30, msg=@0x7ffff0868b47: 0 '\000', wait=wait@entry=true) at ../libs/pbd/crossthread.posix.cc:133
#4  0x00007ffff7963074 in ARDOUR::TriggerBoxThread::thread_work() (this=0x555556769c00) at ../libs/ardour/triggerbox.cc:4853
#5  0x00007ffff6f8085a in fake_thread_start(void*) (arg=0x55555674fcc0) at ../libs/pbd/pthread_utils.cc:101
#6  0x00007ffff53a444b in start_thread (arg=<optimized out>) at pthread_create.c:444
#7  0x00007ffff5427e40 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81

Thread 1 (Thread 0x7ffff0af8a40 (LWP 204669) "ArdourGUI"):
#0  __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44
#1  0x00007ffff53a62d3 in __pthread_kill_internal (signo=6, threadid=<optimized out>) at pthread_kill.c:78
#2  0x00007ffff5356a08 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#3  0x00007ffff533f538 in __GI_abort () at abort.c:79
#4  0x00007ffff56dd3b2 in std::__glibcxx_assert_fail(char const*, int, char const*, char const*) (file=file@entry=0x5555562ecba8 "/usr/include/c++/12.2.1/bits/stl_vector.h", line=line@entry=1206, function=function@entry=0x5555562ecac8 "std::vector<_Tp, _Alloc>::reference std::vector<_Tp, _Alloc>::front() [with _Tp = std::__cxx11::basic_string<char>; _Alloc = std::allocator<std::__cxx11::basic_string<char> >; reference = std::__cxx11"..., condition=condition@entry=0x5555562ec036 "!this->empty()") at /usr/src/debug/gcc/gcc/libstdc++-v3/src/c++11/debug.cc:61
#5  0x0000555555d902d8 in std::vector<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > >::front() (this=0x7fffffffbb20, this=<optimized out>) at /usr/include/c++/12.2.1/bits/stl_vector.h:1206
#6  IOButtonBase::set_label(IOButtonBase&, ARDOUR::Session&, std::shared_ptr<ARDOUR::Bundle>&, std::shared_ptr<ARDOUR::IO>) (self=..., session=..., bndl=std::shared_ptr<ARDOUR::Bundle> (empty) = {...}, io=std::shared_ptr<ARDOUR::IO> (use count 3, weak count 0) = {...}) at ../gtk2_ardour/io_button.cc:378
#7  0x0000555555d909ae in IOButton::update() (this=0x55562878ecf8) at ../libs/ardour/ardour/session_object.h:58
#8  0x0000555555d48aa3 in boost::function2<void, ARDOUR::IOChange, void*>::operator()(ARDOUR::IOChange, void*) const (a1=<optimized out>, a0=..., this=<optimized out>) at /usr/include/boost/function/function_template.hpp:763
#9  boost::_bi::list2<boost::_bi::value<ARDOUR::IOChange>, boost::_bi::value<void*> >::operator()<boost::function<void (ARDOUR::IOChange, void*)>, boost::_bi::list0>(boost::_bi::type<void>, boost::function<void (ARDOUR::IOChange, void*)>&
, boost::_bi::list0&, int) (a=<synthetic pointer>..., f=<optimized out>, this=<optimized out>) at /usr/include/boost/bind/bind.hpp:298
#10 boost::_bi::bind_t<boost::_bi::unspecified, boost::function<void (ARDOUR::IOChange, void*)>, boost::_bi::list2<boost::_bi::value<ARDOUR::IOChange>, boost::_bi::value<void*> > >::operator()() (this=<optimized out>) at /usr/include/boost/bind/bind.hpp:1273
#11 boost::detail::function::void_function_obj_invoker0<boost::_bi::bind_t<boost::_bi::unspecified, boost::function<void (ARDOUR::IOChange, void*)>, boost::_bi::list2<boost::_bi::value<ARDOUR::IOChange>, boost::_bi::value<void*> > >, void>::invoke(boost::detail::function::function_buffer&) (function_obj_ptr=<optimized out>) at /usr/include/boost/function/function_template.hpp:158
#12 0x00007ffff700f857 in boost::function0<void>::operator()() const (this=0x7fffffffc250) at /usr/include/boost/function/function_template.hpp:763
#13 AbstractUI<Gtkmm2ext::UIRequest>::call_slot(PBD::EventLoop::InvalidationRecord*, boost::function<void ()> const&) (this=0x555556e761d0, invalidation=<optimized out>, f=...) at ../libs/pbd/pbd/abstract_ui.cc:461
#14 0x0000555555d45c28 in PBD::Signal2<void, ARDOUR::IOChange, void*, PBD::OptionalLastValue<void> >::compositor(boost::function<void (ARDOUR::IOChange, void*)>, PBD::EventLoop*, PBD::EventLoop::InvalidationRecord*, ARDOUR::IOChange, void*) (f=..., event_loop=0x555556e761d0, ir=0x555628ac05c0, a1=..., a2=<optimized out>) at libs/pbd/pbd/signals_generated.h:1027
#15 0x0000555555d468f4 in boost::_bi::list5<boost::_bi::value<boost::function<void (ARDOUR::IOChange, void*)> >, boost::_bi::value<PBD::EventLoop*>, boost::_bi::value<PBD::EventLoop::InvalidationRecord*>, boost::arg<1>, boost::arg<2> >::operator()<void (*)(boost::function<void (ARDOUR::IOChange, void*)>, PBD::EventLoop*, PBD::EventLoop::InvalidationRecord*, ARDOUR::IOChange, void*), boost::_bi::rrlist2<ARDOUR::IOChange, void*> >(boost::_bi::type<void>, void (*&)(boost::function<void (ARDOUR::IOChange, void*)>, PBD::EventLoop*, PBD::EventLoop::InvalidationRecord*, ARDOUR::IOChange, void*), boost::_bi::rrlist2<ARDOUR::IOChange, void*>&, int) (f=<optimized out>, a=<synthetic pointer>..., this=<optimized out>) at /usr/include/boost/bind/bind.hpp:510
#16 boost::_bi::bind_t<void, void (*)(boost::function<void (ARDOUR::IOChange, void*)>, PBD::EventLoop*, PBD::EventLoop::InvalidationRecord*, ARDOUR::IOChange, void*), boost::_bi::list5<boost::_bi::value<boost::function<void (ARDOUR::IOChange, void*)> >, boost::_bi::value<PBD::EventLoop*>, boost::_bi::value<PBD::EventLoop::InvalidationRecord*>, boost::arg<1>, boost::arg<2> > >::operator()<ARDOUR::IOChange, void*>(ARDOUR::IOChange&&, void*&&) (a2=<synthetic pointer>, a1=..., this=<optimized out>) at /usr/include/boost/bind/bind.hpp:1297
#17 boost::detail::function::void_function_obj_invoker2<boost::_bi::bind_t<void, void (*)(boost::function<void (ARDOUR::IOChange, void*)>, PBD::EventLoop*, PBD::EventLoop::InvalidationRecord*, ARDOUR::IOChange, void*), boost::_bi::list5<boost::_bi::value<boost::function<void (ARDOUR::IOChange, void*)> >, boost::_bi::value<PBD::EventLoop*>, boost::_bi::value<PBD::EventLoop::InvalidationRecord*>, boost::arg<1>, boost::arg<2> > >, void, ARDOUR::IOChange, void*>::invoke(boost::detail::function::function_buffer&, ARDOUR::IOChange, void*) (function_obj_ptr=<optimized out>, a0=..., a1=0x0) at /usr/include/boost/function/function_template.hpp:158
#18 0x00007ffff76be677 in boost::function2<void, ARDOUR::IOChange, void*>::operator()(ARDOUR::IOChange, void*) const (a1=0x0, a0=..., this=0x55562017aed0) at /usr/include/boost/function/function_template.hpp:763
#19 PBD::Signal2<void, ARDOUR::IOChange, void*, PBD::OptionalLastValue<void> >::operator()(ARDOUR::IOChange, void*) (this=0x555603366bc0, a1=..., a2=0x0) at libs/pbd/pbd/signals_generated.h:1136
#20 0x00007ffff76aed3f in ARDOUR::IO::disconnect(void*) (this=0x555603366a70, src=0x0) at ../libs/ardour/ardour/data_type.h:101
#21 0x00007ffff7883f26 in ARDOUR::Session::remove_routes(std::shared_ptr<std::__cxx11::list<std::shared_ptr<ARDOUR::Route>, std::allocator<std::shared_ptr<ARDOUR::Route> > > >) (this=this@entry=0x555558bfaf70, routes_to_remove=std::shared_ptr<std::__cxx11::list<std::shared_ptr<ARDOUR::Route>, std::allocator<std::shared_ptr<ARDOUR::Route> > >> (use count 2, weak count 0) = {...}) at ../libs/ardour/session.cc:3525
#22 0x0000555555c76adb in Editor::_remove_tracks() (this=0x555558edcc80) at ../gtk2_ardour/editor_ops.cc:8362
#23 0x0000555555c77565 in Editor::idle_remove_tracks() (this=<optimized out>) at ../gtk2_ardour/editor_ops.cc:8200
#24 0x00007ffff6e73806 in sigc::slot0<bool>::operator()() const (this=<optimized out>) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:535
#25 (anonymous namespace)::glibmm_source_callback(void*) (data=<optimized out>) at ../glibmm/glib/glibmm/main.cc:243
#26 0x00007ffff6ccb981 in g_main_dispatch (context=0x555556e62930) at ../glib/glib/gmain.c:3460
#27 g_main_context_dispatch (context=0x555556e62930) at ../glib/glib/gmain.c:4200
#28 0x00007ffff6d28b39 in g_main_context_iterate.isra.0 (context=0x555556e62930, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/glib/gmain.c:4276
#29 0x00007ffff6ccaf3f in g_main_loop_run (loop=0x555557442f70) at ../glib/glib/gmain.c:4479
#30 0x00007ffff6738473 in IA__gtk_main () at /usr/src/debug/gtk2/gtk/gtk/gtkmain.c:1270
#31 0x00007ffff700ff09 in Gtkmm2ext::UI::run(Receiver&) (this=this@entry=0x555556e761d0, old_receiver=warning: RTTI symbol not found for class 'TextReceiver'
...) at ../libs/gtkmm2ext/gtk_ui.cc:305
#32 0x00005555559df067 in main(int, char**) (argc=<optimized out>, argv=<optimized out>) at ../gtk2_ardour/main.cc:471