Starting program: /usr/local/src/ardour3/build/gtk2_ardour/ardour-3.0 
[Thread debugging using libthread_db enabled]
Ardour3.0alpha10 (built using ['10469'] and GCC version 4.6.1)
Copyright (C) 1999-2011 Paul Davis
Some portions Copyright (C) Steve Harris, Ari Johnson, Brett Viren, Joel Baker

Ardour comes with ABSOLUTELY NO WARRANTY
not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
This is free software, and you are welcome to redistribute it 
under certain conditions; see the source for copying conditions.
Cannot xinstall SIGPIPE error handler
ardour: [INFO]: Loading default ui configuration file gtk2_ardour/../gtk2_ardour/ardour3_ui_default.conf
Loading ui configuration file gtk2_ardour/../build/gtk2_ardour/ardour3_ui_dark.rc
ardour: [INFO]: Ardour will be limited to 4096 open files
[New Thread 0x7fffe4f0d700 (LWP 23164)]
ardour: [INFO]: Loading system configuration file /usr/local/etc/ardour3/ardour_system.rc
Loading user configuration file /home/acolomb/.config/ardour3/ardour.rc
Using SSE optimized routines
[New Thread 0x7fffe470c700 (LWP 23165)]
[New Thread 0x7fffe3f0b700 (LWP 23166)]
[New Thread 0x7fffe370a700 (LWP 23167)]
ardour: [INFO]: looking for panners in gtk2_ardour/../build/libs/panners/2in2out:gtk2_ardour/../build/libs/panners/1in2out:gtk2_ardour/../build/libs/panners/vbap
ardour: [INFO]: Panner discovered: "Equal Power Stereo"
ardour: [INFO]: Panner discovered: "Mono to Stereo Panner"
ardour: [INFO]: Panner discovered: "VBAP 2D panner"
[New Thread 0x7fffe16c4700 (LWP 23168)]
[New Thread 0x7fffe0ec3700 (LWP 23169)]
[New Thread 0x7fffd65c8700 (LWP 23170)]
[New Thread 0x7fffd5dc7700 (LWP 23171)]
[New Thread 0x7fffd55c6700 (LWP 23172)]
[New Thread 0x7fffd4dc5700 (LWP 23173)]
[New Thread 0x7fffe06c2700 (LWP 23174)]
[New Thread 0x7fffe0641700 (LWP 23175)]
[Thread 0x7fffe0641700 (LWP 23175) exited]
[Thread 0x7fffe06c2700 (LWP 23174) exited]
[Thread 0x7fffd4dc5700 (LWP 23173) exited]
[Thread 0x7fffe16c4700 (LWP 23168) exited]
[Thread 0x7fffe0ec3700 (LWP 23169) exited]
[Thread 0x7fffd5dc7700 (LWP 23171) exited]
[Thread 0x7fffd65c8700 (LWP 23170) exited]
[Thread 0x7fffd55c6700 (LWP 23172) exited]
[New Thread 0x7fffd55c6700 (LWP 23214)]
[New Thread 0x7fffd65c8700 (LWP 23215)]
[New Thread 0x7fffd5dc7700 (LWP 23216)]
[Thread 0x7fffd5dc7700 (LWP 23216) exited]
[Thread 0x7fffd65c8700 (LWP 23215) exited]
[New Thread 0x7fffe16c4700 (LWP 23218)]
[New Thread 0x7fffe1643700 (LWP 23219)]
[Thread 0x7fffd55c6700 (LWP 23214) exited]
LV2: Discovering 186 plugins
Done LV2 discovery
[New Thread 0x7fffe0f5e700 (LWP 23227)]
[New Thread 0x7fffe00fb700 (LWP 23228)]
[New Thread 0x7fffb5a7f700 (LWP 23229)]
[New Thread 0x7fffb59fe700 (LWP 23230)]
[New Thread 0x7fffd407d820 (LWP 23231)]
[New Thread 0x7fffd55c6700 (LWP 23232)]
[New Thread 0x7fffb597c820 (LWP 23234)]
[New Thread 0x7fffd65c8700 (LWP 23235)]
[New Thread 0x7fffd5dc7700 (LWP 23236)]
[Thread 0x7fffd5dc7700 (LWP 23236) exited]
[Thread 0x7fffd65c8700 (LWP 23235) exited]
ardour-3.0: /usr/include/boost/smart_ptr/shared_ptr.hpp:418: T* boost::shared_ptr<T>::operator->() const [with T = ARDOUR::Speakers]: Assertion `px != 0' failed.

Program received signal SIGABRT, Aborted.
0x00007fffec526405 in *__GI_raise (sig=<optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
64	../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
	in ../nptl/sysdeps/unix/sysv/linux/raise.c
(gdb) thread apply all bt

Thread 25 (Thread 0x7fffb597c820 (LWP 23234)):
#0  0x00007fffec88689d in nanosleep () at ../sysdeps/unix/syscall-template.S:82
#1  0x00007ffff2c02da2 in g_usleep () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffff6de3666 in ARDOUR::AudioEngine::meter_thread (this=0x2a15a40) at ../libs/ardour/audioengine.cc:692
#3  0x00007ffff6e02d00 in boost::_mfi::mf0<void, ARDOUR::AudioEngine>::operator() (this=0x6d2a8b0, p=0x2a15a40) at /usr/include/boost/bind/mem_fn_template.hpp:49
#4  0x00007ffff6dfe350 in boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> >::operator()<boost::_mfi::mf0<void, ARDOUR::AudioEngine>, boost::_bi::list0> (this=0x6d2a8c0, f=..., a=...) at /usr/include/boost/bind/bind.hpp:253
#5  0x00007ffff6df9edf in boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AudioEngine>, boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> > >::operator() (this=0x6d2a8b0) at /usr/include/boost/bind/bind_template.hpp:20
#6  0x00007ffff6df52bc in sigc::adaptor_functor<boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AudioEngine>, boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> > > >::operator() (this=0x6d2a8b0)
    at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#7  0x00007ffff6df0c16 in sigc::internal::slot_call0<boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AudioEngine>, boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> > >, void>::call_it (rep=0x6d2a880)
    at /usr/include/sigc++-2.0/sigc++/functors/slot.h:103
#8  0x00007ffff372e94d in operator() (this=0x3f5ac50) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:440
#9  (anonymous namespace)::call_thread_entry_slot (data=0x3f5ac50) at thread.cc:44
#10 0x00007ffff2bff986 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007fffec87eb40 in start_thread (arg=<optimized out>) at pthread_create.c:304
#12 0x00007fffec5c936d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 24 (Thread 0x7fffd55c6700 (LWP 23232)):
#0  0x00007fffec5be723 in *__GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007ffff2bda6b8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffff2bdaee2 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffff4cd613f in BaseUI::main_thread (this=0x3f33000) at ../libs/pbd/base_ui.cc:77
#4  0x00007ffff4cd74e9 in sigc::bound_mem_functor0<void, BaseUI>::operator() (this=0x28a8298) at /usr/include/sigc++-2.0/sigc++/functors/mem_fun.h:1787
#5  0x00007ffff4cd734e in sigc::adaptor_functor<sigc::bound_mem_functor0<void, BaseUI> >::operator() (this=0x28a8290) at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#6  0x00007ffff4cd70bf in sigc::internal::slot_call0<sigc::bound_mem_functor0<void, BaseUI>, void>::call_it (rep=0x28a8260) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:103
#7  0x00007ffff372e94d in operator() (this=0x2884f80) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:440
#8  (anonymous namespace)::call_thread_entry_slot (data=0x2884f80) at thread.cc:44
#9  0x00007ffff2bff986 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007fffec87eb40 in start_thread (arg=<optimized out>) at pthread_create.c:304
#11 0x00007fffec5c936d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 23 (Thread 0x7fffd407d820 (LWP 23231)):
#0  0x00007fffec5be723 in *__GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007ffff6e607ff in ARDOUR::Butler::thread_work (this=0x3e9a270) at ../libs/ardour/butler.cc:153
#2  0x00007ffff6e60759 in ARDOUR::Butler::_thread_work (arg=0x3e9a270) at ../libs/ardour/butler.cc:137
#3  0x00007ffff4d0bf0c in fake_thread_start (arg=0x2896b70) at ../libs/pbd/pthread_utils.cc:81
#4  0x00007fffec87eb40 in start_thread (arg=<optimized out>) at pthread_create.c:304
#5  0x00007fffec5c936d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 22 (Thread 0x7fffb59fe700 (LWP 23230)):
#0  sem_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/sem_wait.S:86
#1  0x00007ffff6f406cc in PBD::ProcessSemaphore::wait (this=0x3e9b8e8) at /usr/local/src/ardour3/libs/pbd/pbd/semutils.h:41
#2  0x00007ffff6f3ebaa in ARDOUR::Graph::run_one (this=0x3e9b820) at ../libs/ardour/graph.cc:433
#3  0x00007ffff6f3ef76 in ARDOUR::Graph::helper_thread (this=0x3e9b820) at ../libs/ardour/graph.cc:483
#4  0x00007ffff6f44776 in boost::_mfi::mf0<void, ARDOUR::Graph>::operator() (this=0x7fffb59fdc08, p=0x3e9b820) at /usr/include/boost/bind/mem_fn_template.hpp:49
#5  0x00007ffff6f44182 in boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> >::operator()<boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list0> (this=0x7fffb59fdc18, f=..., a=...) at /usr/include/boost/bind/bind.hpp:253
#6  0x00007ffff6f43d6d in boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> > >::operator() (this=0x7fffb59fdc08) at /usr/include/boost/bind/bind_template.hpp:20
#7  0x00007ffff6f438dd in boost::detail::function::void_function_obj_invoker0<boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> > >, void>::invoke (function_obj_ptr=...)
    at /usr/include/boost/function/function_template.hpp:153
#8  0x00000000013a6c92 in boost::function0<void>::operator() (this=0x7fffb59fdc00) at /usr/include/boost/function/function_template.hpp:1013
#9  0x00007ffff6de63f1 in ARDOUR::AudioEngine::_start_process_thread (arg=0x3eabcb0) at ../libs/ardour/audioengine.cc:1476
#10 0x00007fffec87eb40 in start_thread (arg=<optimized out>) at pthread_create.c:304
#11 0x00007fffec5c936d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 21 (Thread 0x7fffb5a7f700 (LWP 23229)):
#0  sem_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/sem_wait.S:86
#1  0x00007ffff6f406cc in PBD::ProcessSemaphore::wait (this=0x3e9b908) at /usr/local/src/ardour3/libs/pbd/pbd/semutils.h:41
#2  0x00007ffff6f3ddbf in ARDOUR::Graph::restart_cycle (this=0x3e9b820) at ../libs/ardour/graph.cc:263
---Type <return> to continue, or q <return> to quit---
#3  0x00007ffff6f3dd89 in ARDOUR::Graph::dec_ref (this=0x3e9b820) at ../libs/ardour/graph.cc:250
#4  0x00007ffff6f44e16 in ARDOUR::GraphNode::finish (this=0x3f6d5f0, chain=1) at ../libs/ardour/graphnode.cc:71
#5  0x00007ffff6f3ed15 in ARDOUR::Graph::run_one (this=0x3e9b820) at ../libs/ardour/graph.cc:447
#6  0x00007ffff6f3ef76 in ARDOUR::Graph::helper_thread (this=0x3e9b820) at ../libs/ardour/graph.cc:483
#7  0x00007ffff6f44776 in boost::_mfi::mf0<void, ARDOUR::Graph>::operator() (this=0x7fffb5a7ec08, p=0x3e9b820) at /usr/include/boost/bind/mem_fn_template.hpp:49
#8  0x00007ffff6f44182 in boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> >::operator()<boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list0> (this=0x7fffb5a7ec18, f=..., a=...) at /usr/include/boost/bind/bind.hpp:253
#9  0x00007ffff6f43d6d in boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> > >::operator() (this=0x7fffb5a7ec08) at /usr/include/boost/bind/bind_template.hpp:20
#10 0x00007ffff6f438dd in boost::detail::function::void_function_obj_invoker0<boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> > >, void>::invoke (function_obj_ptr=...)
    at /usr/include/boost/function/function_template.hpp:153
#11 0x00000000013a6c92 in boost::function0<void>::operator() (this=0x7fffb5a7ec00) at /usr/include/boost/function/function_template.hpp:1013
#12 0x00007ffff6de63f1 in ARDOUR::AudioEngine::_start_process_thread (arg=0x3eabcb0) at ../libs/ardour/audioengine.cc:1476
#13 0x00007fffec87eb40 in start_thread (arg=<optimized out>) at pthread_create.c:304
#14 0x00007fffec5c936d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#15 0x0000000000000000 in ?? ()

Thread 20 (Thread 0x7fffe00fb700 (LWP 23228)):
#0  sem_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/sem_wait.S:86
#1  0x00007ffff6f406cc in PBD::ProcessSemaphore::wait (this=0x3e9b8e8) at /usr/local/src/ardour3/libs/pbd/pbd/semutils.h:41
#2  0x00007ffff6f3ebaa in ARDOUR::Graph::run_one (this=0x3e9b820) at ../libs/ardour/graph.cc:433
#3  0x00007ffff6f3f1a8 in ARDOUR::Graph::main_thread (this=0x3e9b820) at ../libs/ardour/graph.cc:522
#4  0x00007ffff6f44776 in boost::_mfi::mf0<void, ARDOUR::Graph>::operator() (this=0x7fffe00fac08, p=0x3e9b820) at /usr/include/boost/bind/mem_fn_template.hpp:49
#5  0x00007ffff6f44182 in boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> >::operator()<boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list0> (this=0x7fffe00fac18, f=..., a=...) at /usr/include/boost/bind/bind.hpp:253
#6  0x00007ffff6f43d6d in boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> > >::operator() (this=0x7fffe00fac08) at /usr/include/boost/bind/bind_template.hpp:20
#7  0x00007ffff6f438dd in boost::detail::function::void_function_obj_invoker0<boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::Graph>, boost::_bi::list1<boost::_bi::value<ARDOUR::Graph*> > >, void>::invoke (function_obj_ptr=...)
    at /usr/include/boost/function/function_template.hpp:153
#8  0x00000000013a6c92 in boost::function0<void>::operator() (this=0x7fffe00fac00) at /usr/include/boost/function/function_template.hpp:1013
#9  0x00007ffff6de63f1 in ARDOUR::AudioEngine::_start_process_thread (arg=0x3eabcb0) at ../libs/ardour/audioengine.cc:1476
#10 0x00007fffec87eb40 in start_thread (arg=<optimized out>) at pthread_create.c:304
#11 0x00007fffec5c936d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 19 (Thread 0x7fffe0f5e700 (LWP 23227)):
#0  sem_timedwait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S:106
#1  0x00007fffee72f180 in ?? () from /usr/lib/libjack.so.0
#2  0x00007fffee71e14a in ?? () from /usr/lib/libjack.so.0
#3  0x00007fffee71c9d7 in ?? () from /usr/lib/libjack.so.0
#4  0x00007ffff6de2880 in ARDOUR::AudioEngine::process_thread (this=0x2a15a40) at ../libs/ardour/audioengine.cc:441
#5  0x00007ffff6de2294 in ARDOUR::AudioEngine::_process_thread (arg=0x2a15a40) at ../libs/ardour/audioengine.cc:352
#6  0x00007fffee71ab88 in ?? () from /usr/lib/libjack.so.0
#7  0x00007fffee72e7a0 in ?? () from /usr/lib/libjack.so.0
#8  0x00007fffec87eb40 in start_thread (arg=<optimized out>) at pthread_create.c:304
#9  0x00007fffec5c936d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 18 (Thread 0x7fffe1643700 (LWP 23219)):
#0  0x00007fffec88617d in read () at ../sysdeps/unix/syscall-template.S:82
#1  0x00007fffee73042a in ?? () from /usr/lib/libjack.so.0
#2  0x00007fffee732cf7 in ?? () from /usr/lib/libjack.so.0
#3  0x00007fffee72e7a0 in ?? () from /usr/lib/libjack.so.0
#4  0x00007fffec87eb40 in start_thread (arg=<optimized out>) at pthread_create.c:304
#5  0x00007fffec5c936d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 17 (Thread 0x7fffe16c4700 (LWP 23218)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fffee72ff21 in ?? () from /usr/lib/libjack.so.0
#2  0x00007fffee72b5f5 in ?? () from /usr/lib/libjack.so.0
#3  0x00007fffee72e7a0 in ?? () from /usr/lib/libjack.so.0
#4  0x00007fffec87eb40 in start_thread (arg=<optimized out>) at pthread_create.c:304
#5  0x00007fffec5c936d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7fffe370a700 (LWP 23167)):
---Type <return> to continue, or q <return> to quit---
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007ffff6d74681 in ARDOUR::Analyser::work () at ../libs/ardour/analyser.cc:85
#2  0x00007ffff6d74419 in analyser_work () at ../libs/ardour/analyser.cc:49
#3  0x0000000001949a4d in sigc::pointer_functor0<void>::operator() (this=0x7fffdc000998) at /usr/include/sigc++-2.0/sigc++/functors/ptr_fun.h:77
#4  0x000000000194740e in sigc::adaptor_functor<sigc::pointer_functor0<void> >::operator() (this=0x7fffdc000990) at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#5  0x00000000019445d5 in sigc::internal::slot_call0<sigc::pointer_functor0<void>, void>::call_it (rep=0x7fffdc000960) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:103
#6  0x00007ffff372e94d in operator() (this=0x7fffdc000940) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:440
#7  (anonymous namespace)::call_thread_entry_slot (data=0x7fffdc000940) at thread.cc:44
#8  0x00007ffff2bff986 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007fffec87eb40 in start_thread (arg=<optimized out>) at pthread_create.c:304
#10 0x00007fffec5c936d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7fffe3f0b700 (LWP 23166)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007ffff721965d in peak_thread_work () at ../libs/ardour/source_factory.cc:68
#2  0x0000000001949a4d in sigc::pointer_functor0<void>::operator() (this=0x2839968) at /usr/include/sigc++-2.0/sigc++/functors/ptr_fun.h:77
#3  0x000000000194740e in sigc::adaptor_functor<sigc::pointer_functor0<void> >::operator() (this=0x2839960) at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#4  0x00000000019445d5 in sigc::internal::slot_call0<sigc::pointer_functor0<void>, void>::call_it (rep=0x2839930) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:103
#5  0x00007ffff372e94d in operator() (this=0x27feec0) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:440
#6  (anonymous namespace)::call_thread_entry_slot (data=0x27feec0) at thread.cc:44
#7  0x00007ffff2bff986 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007fffec87eb40 in start_thread (arg=<optimized out>) at pthread_create.c:304
#9  0x00007fffec5c936d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fffe470c700 (LWP 23165)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007ffff721965d in peak_thread_work () at ../libs/ardour/source_factory.cc:68
#2  0x0000000001949a4d in sigc::pointer_functor0<void>::operator() (this=0x2839c68) at /usr/include/sigc++-2.0/sigc++/functors/ptr_fun.h:77
#3  0x000000000194740e in sigc::adaptor_functor<sigc::pointer_functor0<void> >::operator() (this=0x2839c60) at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#4  0x00000000019445d5 in sigc::internal::slot_call0<sigc::pointer_functor0<void>, void>::call_it (rep=0x2839c30) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:103
#5  0x00007ffff372e94d in operator() (this=0x280cb40) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:440
#6  (anonymous namespace)::call_thread_entry_slot (data=0x280cb40) at thread.cc:44
#7  0x00007ffff2bff986 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007fffec87eb40 in start_thread (arg=<optimized out>) at pthread_create.c:304
#9  0x00007fffec5c936d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fffe4f0d700 (LWP 23164)):
#0  0x00007fffec59a1cd in nanosleep () at ../sysdeps/unix/syscall-template.S:82
#1  0x00007fffec5c3584 in usleep (useconds=<optimized out>) at ../sysdeps/unix/sysv/linux/usleep.c:33
#2  0x00007ffff72539c7 in gui_event_loop (ptr=0x0) at ../libs/ardour/vstfxwin.cc:382
#3  0x00007fffec87eb40 in start_thread (arg=<optimized out>) at pthread_create.c:304
#4  0x00007fffec5c936d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7ffff7f169a0 (LWP 23155)):
#0  0x00007fffec526405 in *__GI_raise (sig=<optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#1  0x00007fffec529680 in *__GI_abort () at abort.c:92
#2  0x00007fffec51f5b1 in *__GI___assert_fail (assertion=0x1e0abcc "px != 0", file=<optimized out>, line=418, function=0x1e0dc60 "T* boost::shared_ptr<T>::operator->() const [with T = ARDOUR::Speakers]") at assert.c:81
#3  0x00000000018a68f7 in boost::shared_ptr<ARDOUR::Speakers>::operator-> (this=0x7fffffffc2c0) at /usr/include/boost/smart_ptr/shared_ptr.hpp:418
#4  0x00000000018a3222 in Panner2d::handle_position_change (this=0x6fe5170) at ../gtk2_ardour/panner2d.cc:262
#5  0x00000000018a8770 in boost::_mfi::mf0<void, Panner2d>::operator() (this=0x6e35d28, p=0x6fe5170) at /usr/include/boost/bind/mem_fn_template.hpp:49
#6  0x00000000018a83d6 in boost::_bi::list1<boost::_bi::value<Panner2d*> >::operator()<boost::_mfi::mf0<void, Panner2d>, boost::_bi::list0> (this=0x6e35d38, f=..., a=...) at /usr/include/boost/bind/bind.hpp:253
#7  0x00000000018a809d in boost::_bi::bind_t<void, boost::_mfi::mf0<void, Panner2d>, boost::_bi::list1<boost::_bi::value<Panner2d*> > >::operator() (this=0x6e35d28) at /usr/include/boost/bind/bind_template.hpp:20
#8  0x00000000018a7c9b in boost::detail::function::void_function_obj_invoker0<boost::_bi::bind_t<void, boost::_mfi::mf0<void, Panner2d>, boost::_bi::list1<boost::_bi::value<Panner2d*> > >, void>::invoke (function_obj_ptr=...)
    at /usr/include/boost/function/function_template.hpp:153
#9  0x00000000013a6c92 in boost::function0<void>::operator() (this=0x6e35d20) at /usr/include/boost/function/function_template.hpp:1013
#10 0x00007ffff517b1c6 in AbstractUI<Gtkmm2ext::UIRequest>::call_slot(PBD::EventLoop::InvalidationRecord*, boost::function<void ()> const&) (this=0x2600c40, invalidation=0x6db95c0, f=...)
    at /usr/local/src/ardour3/libs/pbd/pbd/abstract_ui.cc:220
#11 0x0000000001352351 in boost::_mfi::mf2<void, PBD::EventLoop, PBD::EventLoop::InvalidationRecord*, boost::function<void ()> const&>::operator()(PBD::EventLoop*, PBD::EventLoop::InvalidationRecord*, boost::function<void ()> const&) const (this=0x6e35d00, p=0x2600c40, a1=0x6db95c0, a2=...) at /usr/include/boost/bind/mem_fn_template.hpp:280
---Type <return> to continue, or q <return> to quit---
#12 0x0000000001351e12 in boost::_bi::list3<boost::_bi::value<PBD::EventLoop*>, boost::_bi::value<PBD::EventLoop::InvalidationRecord*>, boost::_bi::value<boost::function<void ()> > >::operator()<boost::_mfi::mf2<void, PBD::EventLoop, PBD::EventLoop::InvalidationRecord*, boost::function<void ()> const&>, boost::_bi::list0>(boost::_bi::type<void>, boost::_mfi::mf2<void, PBD::EventLoop, PBD::EventLoop::InvalidationRecord*, boost::function<void ()> const&>&, boost::_bi::list0&, int) (this=0x6e35d10, f=..., a=...) at /usr/include/boost/bind/bind.hpp:392
#13 0x000000000135144b in boost::_bi::bind_t<void, boost::_mfi::mf2<void, PBD::EventLoop, PBD::EventLoop::InvalidationRecord*, boost::function<void ()> const&>, boost::_bi::list3<boost::_bi::value<PBD::EventLoop*>, boost::_bi::value<PBD::EventLoop::InvalidationRecord*>, boost::_bi::value<boost::function<void ()> > > >::operator()() (this=0x6e35d00) at /usr/include/boost/bind/bind_template.hpp:20
#14 0x000000000134ffe0 in boost::detail::function::void_function_obj_invoker0<boost::_bi::bind_t<void, boost::_mfi::mf2<void, PBD::EventLoop, PBD::EventLoop::InvalidationRecord*, boost::function<void ()> const&>, boost::_bi::list3<boost::_bi::value<PBD::EventLoop*>, boost::_bi::value<PBD::EventLoop::InvalidationRecord*>, boost::_bi::value<boost::function<void ()> > > >, void>::invoke(boost::detail::function::function_buffer&) (function_obj_ptr=...)
    at /usr/include/boost/function/function_template.hpp:153
#15 0x00000000013a6c92 in boost::function0<void>::operator() (this=0x6ddf2d8) at /usr/include/boost/function/function_template.hpp:1013
#16 0x00000000013a1fe1 in boost::signals2::detail::signal0_impl<void, boost::signals2::optional_last_value<void>, int, std::less<int>, boost::function<void ()>, boost::function<void (boost::signals2::connection const&)>, boost::signals2::mutex>::slot_invoker::m_invoke(boost::shared_ptr<boost::signals2::detail::connection_body<std::pair<boost::signals2::detail::slot_meta_group, boost::optional<int> >, boost::signals2::slot0<void, boost::function<void ()> >, boost::signals2::mutex> > const&, boost::signals2::detail::void_type const*) const (this=0x7fffffffc8b0, connectionBody=...) at /usr/include/boost/signals2/detail/signal_template.hpp:360
#17 0x000000000139bed2 in boost::signals2::detail::signal0_impl<void, boost::signals2::optional_last_value<void>, int, std::less<int>, boost::function<void ()>, boost::function<void (boost::signals2::connection const&)>, boost::signals2::mutex>::slot_invoker::operator()(boost::shared_ptr<boost::signals2::detail::connection_body<std::pair<boost::signals2::detail::slot_meta_group, boost::optional<int> >, boost::signals2::slot0<void, boost::function<void ()> >, boost::signals2::mutex> > const&) const (this=0x7fffffffc8b0, connectionBody=...) at /usr/include/boost/signals2/detail/signal_template.hpp:345
#18 0x00000000013954d7 in boost::signals2::detail::slot_call_iterator_t<boost::signals2::detail::signal0_impl<void, boost::signals2::optional_last_value<void>, int, std::less<int>, boost::function<void ()>, boost::function<void (boost::signals2::connection const&)>, boost::signals2::mutex>::slot_invoker, std::_List_iterator<boost::shared_ptr<boost::signals2::detail::connection_body<std::pair<boost::signals2::detail::slot_meta_group, boost::optional<int> >, boost::signals2::slot0<void, boost::function<void ()> >, boost::signals2::mutex> > >, boost::signals2::detail::connection_body<std::pair<boost::signals2::detail::slot_meta_group, boost::optional<int> >, boost::signals2::slot0<void, boost::function<void ()> >, boost::signals2::mutex> >::dereference() const (this=0x7fffffffc6f0) at /usr/include/boost/signals2/detail/slot_call_iterator.hpp:82
#19 0x000000000138ec3a in boost::iterator_core_access::dereference<boost::signals2::detail::slot_call_iterator_t<boost::signals2::detail::signal0_impl<void, boost::signals2::optional_last_value<void>, int, std::less<int>, boost::function<void ()>, boost::function<void (boost::signals2::connection const&)>, boost::signals2::mutex>::slot_invoker, std::_List_iterator<boost::shared_ptr<boost::signals2::detail::connection_body<std::pair<boost::signals2::detail::slot_meta_group, boost::optional<int> >, boost::signals2::slot0<void, boost::function<void ()> >, boost::signals2::mutex> > >, boost::signals2::detail::connection_body<std::pair<boost::signals2::detail::slot_meta_group, boost::optional<int> >, boost::signals2::slot0<void, boost::function<void ()> >, boost::signals2::mutex> > >(boost::signals2::detail::slot_call_iterator_t<boost::signals2::detail::signal0_impl<void, boost::signals2::optional_last_value<void>, int, std::less<int>, boost::function<void ()>, boost::function<void (boost::signals2::connection const&)>, boost::signals2::mutex>::slot_invoker, std::_List_iterator<boost::shared_ptr<boost::signals2::detail::connection_body<std::pair<boost::signals2::detail::slot_meta_group, boost::optional<int> >, boost::signals2::slot0<void, boost::function<void ()> >, boost::signals2::mutex> > >, boost::signals2::detail::connection_body<std::pair<boost::signals2::detail::slot_meta_group, boost::optional<int> >, boost::signals2::slot0<void, boost::function<void ()> >, boost::signals2::mutex> > const&) (f=...) at /usr/include/boost/iterator/iterator_facade.hpp:517
#20 0x0000000001388dca in boost::iterator_facade<boost::signals2::detail::slot_call_iterator_t<boost::signals2::detail::signal0_impl<void, boost::signals2::optional_last_value<void>, int, std::less<int>, boost::function<void ()>, boost::function<void (boost::signals2::connection const&)>, boost::signals2::mutex>::slot_invoker, std::_List_iterator<boost::shared_ptr<boost::signals2::detail::connection_body<std::pair<boost::signals2::detail::slot_meta_group, boost::optional<int> >, boost::signals2::slot0<void, boost::function<void ()> >, boost::signals2::mutex> > >, boost::signals2::detail::connection_body<std::pair<boost::signals2::detail::slot_meta_group, boost::optional<int> >, boost::signals2::slot0<void, boost::function<void ()> >, boost::signals2::mutex> >, boost::signals2::detail::void_type, boost::single_pass_traversal_tag, boost::signals2::detail::void_type const&, long>::operator*() const (this=0x7fffffffc6f0)
    at /usr/include/boost/iterator/iterator_facade.hpp:643
#21 0x000000000138463b in boost::signals2::optional_last_value<void>::operator()<boost::signals2::detail::slot_call_iterator_t<boost::signals2::detail::signal0_impl<void, boost::signals2::optional_last_value<void>, int, std::less<int>, boost::function<void ()>, boost::function<void (boost::signals2::connection const&)>, boost::signals2::mutex>::slot_invoker, std::_List_iterator<boost::shared_ptr<boost::signals2::detail::connection_body<std::pair<boost::signals2::detail::slot_meta_group, boost::optional<int> >, boost::signals2::slot0<void, boost::function<void ()> >, boost::signals2::mutex> > >, boost::signals2::detail::connection_body<std::pair<boost::signals2::detail::slot_meta_group, boost::optional<int> >, boost::signals2::slot0<void, boost::function<void ()> >, boost::signals2::mutex> > >(boost::signals2::detail::slot_call_iterator_t<boost::signals2::detail::signal0_impl<void, boost::signals2::optional_last_value<void>, int, std::less<int>, boost::function<void ()>, boost::function<void (boost::signals2::connection const&)>, boost::signals2::mutex>::slot_invoker, std::_List_iterator<boost::shared_ptr<boost::signals2::detail::connection_body<std::pair<boost::signals2::detail::slot_meta_group, boost::optional<int> >, boost::signals2::slot0<void, boost::function<void ()> >, boost::signals2::mutex> > >, boost::signals2::detail::connection_body<std::pair<boost::signals2::detail::slot_meta_group, boost::optional<int> >, boost::signals2::slot0<void, boost::function<void ()> >, boost::signals2::mutex> >, boost::signals2::detail::slot_call_iterator_t<boost::signals2::detail::signal0_impl<void, boost::signals2::optional_last_value<void>, int, std::less<int>, boost::function<void ()>, boost::function<void (boost::signals2::connection const&)>, boost::signals2::mutex>::slot_invoker, std::_List_iterator<boost::shared_ptr<boost::signals2::detail::connection_body<std::pair<boost::signals2::detail::slot_meta_group, boost::optional<int> >, boost::signals2::slot0<void, boost::function<void ()> >, boost::signals2::mutex> > >, boost::signals2::detail::connection_body<std::pair<boost::signals2::detail::slot_meta_group, boost::optional<int> >, boost::signals2::slot0<void, boost::function<void ()> >, boost::signals2::mutex> >) const (this=0x6ab8e70, first=..., last=...) at /usr/include/boost/signals2/optional_last_value.hpp:55
#22 0x000000000137ef6f in boost::signals2::detail::combiner_invoker<void>::operator()<boost::signals2::optional_last_value<void>, boost::signals2::detail::slot_call_iterator_t<boost::signals2::detail::signal0_impl<void, boost::signals2::optional_last_value<void>, int, std::less<int>, boost::function<void ()>, boost::function<void (boost::signals2::connection const&)>, boost::signals2::mutex>::slot_invoker, std::_List_iterator<boost::shared_ptr<boost::signals2::detail::connection_body<std::pair<boost::signals2::detail::slot_meta_group, boost::optional<int> >, boost::signals2::slot0<void, boost::function<void ()> >, boost::signals2::mutex> > >, boost::signals2::detail::connection_body<std::pair<boost::signals2::detail::slot_meta_group, boost::optional<int> >, boost::signals2::slot0<void, boost::function<void ()> >, boost::signals2::mutex> > >(boost::signals2::optional_last_value<void>&, boost::signals2::detail::slot_call_iterator_t<boost::signals2::detail::signal0_impl<void, boost::signals2::optional_last_value<void>, int, std::less<int>, boost::function<void ()>, boost::function<void (boost::signals2::connection const&)>, boost::signals2::mutex>::slot_invoker, std::_List_iterator<boost::shared_ptr<boost::signals2::detail::connection_body<std::pair<boost::signals2::detail::slot_meta_group, boost::optional<int> >, boost::signals2::slot0<void, boost::function<void ()> >, boost::signals2::mutex> > >, boost::signals2::detail::connection_body<std::pair<boost::signals2::detail::slot_meta_group, boost::optional<int> >, boost::signals2::slot0<void, boost::function<void ()> >, boost::signals2::mutex> >, boost::signals2::detail::slot_call_iterator_t<boost::signals2::detail::signal0_impl<void, boost::signals2::optional_last_value<void>, int, std::less<int>, boost::function<void ()>, boost::function<void (boost::signals2::connection const&)>, boost::signals2::mutex>::slot_invoker, std::_List_iterator<boost::shared_ptr<boost::signals2::detail::connection_body<std::pair<boost::signals2::detail::slot_meta_group, boost::optional<int> >, boost::signals2::slot0<void, boost::function<void ()> >, boost::signals2::mutex> > >, boost::signals2::detail::connection_body<std::pair<boost::signals2::detail::slot_meta_group, boost::optional<int> >, boost::signals2::slot0<void, boost::function<void ()> >, boost::signals2::mutex> >) const (
    this=0x7fffffffc95f, combiner=..., first=..., last=...) at /usr/include/boost/signals2/detail/result_type_wrapper.hpp:64
#23 0x000000000137a4ae in boost::signals2::detail::signal0_impl<void, boost::signals2::optional_last_value<void>, int, std::less<int>, boost::function<void ()>, boost::function<void (boost::signals2::connection const&)>, boost::signals2::mutex>::operator()() (this=0x6ab8d80) at /usr/include/boost/signals2/detail/signal_template.hpp:246
#24 0x0000000001375126 in boost::signals2::signal0<void, boost::signals2::optional_last_value<void>, int, std::less<int>, boost::function<void ()>, boost::function<void (boost::signals2::connection const&)>, boost::signals2::mutex>::operator()() (this=0x6ab7798) at /usr/include/boost/signals2/detail/signal_template.hpp:692
#25 0x000000000137135e in PBD::Signal0<void>::operator() (this=0x6ab7798) at /usr/local/src/ardour3/libs/pbd/pbd/signals.h:110
#26 0x00007ffff6e4287e in ARDOUR::AutomationControl::set_value (this=0x6ab76c0, value=0.5) at ../libs/ardour/automation_control.cc:71
#27 0x00007ffff70264d5 in ARDOUR::PanControllable::set_value (this=0x6ab76c0, v=0.5) at ../libs/ardour/pan_controllable.cc:65
#28 0x00007fffe2cec07f in ARDOUR::Panner2in2out::set_position (this=0x7fffd00be9c0, p=0.5) at ../libs/panners/2in2out/panner_2in2out.cc:114
#29 0x00007fffe2ced725 in ARDOUR::Panner2in2out::reset (this=0x7fffd00be9c0) at ../libs/panners/2in2out/panner_2in2out.cc:497
#30 0x0000000001acf78c in StereoPanner::on_button_release_event (this=0x6fe5cf0, ev=0x6f59970) at ../gtk2_ardour/stereo_panner.cc:435
#31 0x00007ffff06f6ef3 in Gtk::Widget_Class::button_release_event_callback (self=0x6f58710, p0=0x6f59970) at widget.cc:4673
---Type <return> to continue, or q <return> to quit---
#32 0x00007ffff268f1a8 in _gtk_marshal_BOOLEAN__BOXED (closure=0x266f350, return_value=0x7fffffffcc80, n_param_values=<optimized out>, param_values=0x7fffd0089f90, invocation_hint=<optimized out>, marshal_data=<optimized out>)
    at /build/buildd-gtk+2.0_2.24.7-1-amd64-huURlY/gtk+2.0-2.24.7/gtk/gtkmarshalers.c:86
#33 0x00007ffff34ac804 in g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#34 0x00007ffff34be5bf in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#35 0x00007ffff34c7be3 in g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#36 0x00007ffff34c7fb2 in g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#37 0x00007ffff27a8051 in gtk_widget_event_internal (widget=0x6f58710, event=0x6f59970) at /build/buildd-gtk+2.0_2.24.7-1-amd64-huURlY/gtk+2.0-2.24.7/gtk/gtkwidget.c:4984
#38 0x00007ffff268d363 in IA__gtk_propagate_event (widget=0x6f58710, event=0x6f59970) at /build/buildd-gtk+2.0_2.24.7-1-amd64-huURlY/gtk+2.0-2.24.7/gtk/gtkmain.c:2489
#39 0x00007ffff268d6c3 in IA__gtk_main_do_event (event=0x6f59970) at /build/buildd-gtk+2.0_2.24.7-1-amd64-huURlY/gtk+2.0-2.24.7/gtk/gtkmain.c:1684
#40 0x00007ffff22f91dc in gdk_event_dispatch (source=<optimized out>, callback=<optimized out>, user_data=<optimized out>) at /build/buildd-gtk+2.0_2.24.7-1-amd64-huURlY/gtk+2.0-2.24.7/gdk/x11/gdkevents-x11.c:2377
#41 0x00007ffff2bda1ad in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#42 0x00007ffff2bda9a8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#43 0x00007ffff2bdaee2 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#44 0x00007ffff268c717 in IA__gtk_main () at /build/buildd-gtk+2.0_2.24.7-1-amd64-huURlY/gtk+2.0-2.24.7/gtk/gtkmain.c:1256
#45 0x00007ffff516d978 in Gtkmm2ext::UI::run (this=0x2600c20, old_receiver=...) at ../libs/gtkmm2ext/gtk_ui.cc:268
#46 0x00000000017a5b9f in main (argc=1, argv=0x7fffffffd398) at ../gtk2_ardour/main.cc:557
(gdb) 
(gdb)