(gdb) thread apply all bt

Thread 7 (Thread 4057):
#0  0x00007f3e5d9afbc9 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f3e62b70602 in ?? () from /usr/lib/libgthread-2.0.so.0
#2  0x00007f3e63e38851 in ?? () from /lib/libglib-2.0.so.0
#3  0x00007f3e63e38997 in g_async_queue_timed_pop () from /lib/libglib-2.0.so.0
#4  0x00007f3e63e889c8 in ?? () from /lib/libglib-2.0.so.0
#5  0x00007f3e63e86b84 in ?? () from /lib/libglib-2.0.so.0
#6  0x00007f3e5d9aa9ca in start_thread () from /lib/libpthread.so.0
#7  0x00007f3e5d7076fd in clone () from /lib/libc.so.6
#8  0x0000000000000000 in ?? ()

Thread 6 (Thread 4062):
#0  0x00007f3e5d9af85c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f3e641271f1 in ?? () from /usr/lib/libjack.so.0
#2  0x00007f3e6411fe59 in ?? () from /usr/lib/libjack.so.0
#3  0x00007f3e641256e0 in ?? () from /usr/lib/libjack.so.0
#4  0x00007f3e5d9aa9ca in start_thread () from /lib/libpthread.so.0
#5  0x00007f3e5d7076fd in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 5 (Thread 4063):
#0  0x00007f3e5d9b293d in read () from /lib/libpthread.so.0
#1  0x00007f3e64127592 in ?? () from /usr/lib/libjack.so.0
#2  0x00007f3e64129d34 in ?? () from /usr/lib/libjack.so.0
#3  0x00007f3e641256e0 in ?? () from /usr/lib/libjack.so.0
#4  0x00007f3e5d9aa9ca in start_thread () from /lib/libpthread.so.0
#5  0x00007f3e5d7076fd in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 4 (Thread 4042):
#0  0x00007f3e5d9af85c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f3e6702d87d in ARDOUR::Analyser::work () at ../libs/ardour/analyser.cc:85
#2  0x00007f3e6702d5ad in analyser_work () at ../libs/ardour/analyser.cc:49
#3  0x0000000001542077 in sigc::pointer_functor0<void>::operator()() const ()
#4  0x00000000015405ae in sigc::adaptor_functor<sigc::pointer_functor0<void> >::operator()() const ()
#5  0x000000000153de31 in sigc::internal::slot_call0<sigc::pointer_functor0<void>, void>::call_it(sigc::internal::slot_rep*) ()
#6  0x00007f3e62ff1862 in ?? () from /usr/lib/libglibmm-2.4.so.1
#7  0x00007f3e63e86b84 in ?? () from /lib/libglib-2.0.so.0
#8  0x00007f3e5d9aa9ca in start_thread () from /lib/libpthread.so.0
#9  0x00007f3e5d7076fd in clone () from /lib/libc.so.6
#10 0x0000000000000000 in ?? ()

Thread 3 (Thread 4041):
#0  0x00007f3e5d9af85c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f3e674d136f in peak_thread_work () at ../libs/ardour/source_factory.cc:69
#2  0x0000000001542077 in sigc::pointer_functor0<void>::operator()() const ()
#3  0x00000000015405ae in sigc::adaptor_functor<sigc::pointer_functor0<void> >::operator()() const ()
#4  0x000000000153de31 in sigc::internal::slot_call0<sigc::pointer_functor0<void>, void>::call_it(sigc::internal::slot_rep*) ()
#5  0x00007f3e62ff1862 in ?? () from /usr/lib/libglibmm-2.4.so.1
#6  0x00007f3e63e86b84 in ?? () from /lib/libglib-2.0.so.0
#7  0x00007f3e5d9aa9ca in start_thread () from /lib/libpthread.so.0
#8  0x00007f3e5d7076fd in clone () from /lib/libc.so.6
#9  0x0000000000000000 in ?? ()

Thread 2 (Thread 4040):
#0  0x00007f3e5d9af85c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f3e674d136f in peak_thread_work () at ../libs/ardour/source_factory.cc:69
#2  0x0000000001542077 in sigc::pointer_functor0<void>::operator()() const ()
#3  0x00000000015405ae in sigc::adaptor_functor<sigc::pointer_functor0<void> >::operator()() const ()
#4  0x000000000153de31 in sigc::internal::slot_call0<sigc::pointer_functor0<void>, void>::call_it(sigc::internal::slot_rep*) ()
#5  0x00007f3e62ff1862 in ?? () from /usr/lib/libglibmm-2.4.so.1
#6  0x00007f3e63e86b84 in ?? () from /lib/libglib-2.0.so.0
#7  0x00007f3e5d9aa9ca in start_thread () from /lib/libpthread.so.0
---Type <return> to continue, or q <return> to quit---
#8  0x00007f3e5d7076fd in clone () from /lib/libc.so.6
#9  0x0000000000000000 in ?? ()

Thread 1 (Thread 4022):
#0  0x00007f3e5fd8f5ae in Gtk::Widget::get_allocation() const () from /usr/lib/libgtkmm-2.4.so.1
#1  0x000000000118905b in Editor::toggle_meter_updating (this=0x41a3850) at ../gtk2_ardour/editor_audiotrack.cc:78
#2  0x0000000000fc0a09 in ARDOUR_UI::parameter_changed (this=0x36cad60, p=...) at ../gtk2_ardour/ardour_ui_options.cc:425
#3  0x0000000000f61f19 in boost::_mfi::mf1<void, ARDOUR_UI, std::string>::operator() (this=0x7fffad1bd9a8, p=0x36cad60, a1=...)
    at /usr/include/boost/bind/mem_fn_template.hpp:162
#4  0x0000000000f5ad06 in boost::_bi::list2<boost::_bi::value<ARDOUR_UI*>, boost::arg<1> >::operator()<boost::_mfi::mf1<void, ARDOUR_UI, std::string>, boost::_bi::list1<std::string&> > (this=0x7fffad1bd9b8, f=..., a=...) at /usr/include/boost/bind/bind.hpp:306
#5  0x0000000000f540e2 in boost::_bi::bind_t<void, boost::_mfi::mf1<void, ARDOUR_UI, std::string>, boost::_bi::list2<boost::_bi::value<ARDOUR_UI*>, boost::arg<1> > >::operator()<std::string> (this=0x7fffad1bd9a8, a1=...) at /usr/include/boost/bind/bind_template.hpp:32
#6  0x0000000000f4e8c0 in boost::detail::function::void_function_obj_invoker1<boost::_bi::bind_t<void, boost::_mfi::mf1<void, ARDOUR_UI, std::string>, boost::_bi::list2<boost::_bi::value<ARDOUR_UI*>, boost::arg<1> > >, void, std::string>::invoke (function_obj_ptr=..., a0=...)
    at /usr/include/boost/function/function_template.hpp:153
#7  0x0000000000f6beff in boost::function1<void, std::string>::operator() (this=0x7fffad1bd9a0, a0=...)
    at /usr/include/boost/function/function_template.hpp:1013
#8  0x00007f3e6735a700 in ARDOUR::RCConfiguration::map_parameters(boost::function<void ()(std::string)>&) (this=0x395db40, functor=...)
    at ../libs/ardour/ardour/rc_configuration_vars.h:114
#9  0x0000000000f22af0 in ARDOUR_UI::post_engine (this=0x36cad60) at ../gtk2_ardour/ardour_ui.cc:462
#10 0x0000000000f224c5 in ARDOUR_UI::create_engine (this=0x36cad60) at ../gtk2_ardour/ardour_ui.cc:390
#11 0x0000000000f30b7a in ARDOUR_UI::get_session_parameters (this=0x36cad60, quit_on_cancel=true, should_be_new=false, load_template=...)
    at ../gtk2_ardour/ardour_ui.cc:2573
#12 0x0000000000f276e0 in ARDOUR_UI::startup (this=0x36cad60) at ../gtk2_ardour/ardour_ui.cc:694
#13 0x0000000000f59823 in sigc::bound_mem_functor0<void, ARDOUR_UI>::operator() (this=0x380d698) at /usr/include/sigc++-2.0/sigc++/functors/mem_fun.h:1787
#14 0x0000000000f534a8 in sigc::adaptor_functor<sigc::bound_mem_functor0<void, ARDOUR_UI> >::operator() (this=0x380d690)
    at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#15 0x0000000000f4dce7 in sigc::internal::slot_call0<sigc::bound_mem_functor0<void, ARDOUR_UI>, void>::call_it (rep=0x380d660)
    at /usr/include/sigc++-2.0/sigc++/functors/slot.h:103
#16 0x0000000000f37b89 in sigc::internal::signal_emit0<void, sigc::nil>::emit (impl=0x3818170) at /usr/include/sigc++-2.0/sigc++/signal.h:776
#17 0x0000000000f40b56 in sigc::signal0<void, sigc::nil>::emit (this=0x36cae20) at /usr/include/sigc++-2.0/sigc++/signal.h:2671
#18 0x0000000000f3c8ce in sigc::signal0<void, sigc::nil>::operator() (this=0x36cae20) at /usr/include/sigc++-2.0/sigc++/signal.h:2679
#19 0x00007f3e6608a4c4 in Gtkmm2ext::UI::run (this=0x36cad60, old_receiver=...) at ../libs/gtkmm2ext/gtk_ui.cc:263
#20 0x00000000013a8f5a in main (argc=1, argv=0x7fffad1be408) at ../gtk2_ardour/main.cc:604