[Thread 0x9d340b40 (LWP 16802) exited]
^C
Program received signal SIGINT, Interrupt.
0xb7fdd424 in __kernel_vsyscall ()
(gdb) thread apply all backtrace

Thread 19 (Thread 0x9db5eb40 (LWP 16801)):
#0  0xb7fdd424 in __kernel_vsyscall ()
#1  0xb5a87e86 in nanosleep () from /lib/i386-linux-gnu/libc.so.6
#2  0xb5ab87ed in usleep () from /lib/i386-linux-gnu/libc.so.6
#3  0xb799d7e1 in ARDOUR::AutomationWatch::thread (this=0x10128428)
    at ../libs/ardour/automation_watch.cc:135
#4  0xb79a0a40 in boost::_mfi::mf0<void, ARDOUR::AutomationWatch>::operator() (
    this=0x1023acf8, p=0x10128428)
    at /usr/include/boost/bind/mem_fn_template.hpp:49
#5  0xb79a0718 in boost::_bi::list1<boost::_bi::value<ARDOUR::AutomationWatch*> >::operator()<boost::_mfi::mf0<void, ARDOUR::AutomationWatch>, boost::_bi::list0> (this=0x1023ad00, f=..., a=...) at /usr/include/boost/bind/bind.hpp:253
#6  0xb79a030c in boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AutomationWatch>, boost::_bi::list1<boost::_bi::value<ARDOUR::AutomationWatch*> > >::operator() (this=0x1023acf8) at /usr/include/boost/bind/bind_template.hpp:20
#7  0xb79a0289 in sigc::adaptor_functor<boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AutomationWatch>, boost::_bi::list1<boost::_bi::value<ARDOUR::AutomationWatch*> > > >::operator() (this=0x1023acf8)
    at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#8  0xb799fddb in sigc::internal::slot_call0<boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AutomationWatch>, boost::_bi::list1<boost::_bi::value<ARDOUR::AutomationWatch*> > >, void>::call_it (rep=0x1023ace0)
---Type <return> to continue, or q <return> to quit---