__GI___pthread_mutex_lock (mutex=0x1e0) at pthread_mutex_lock.c:50
50	  unsigned int type = PTHREAD_MUTEX_TYPE (mutex);
(gdb) bt full
#0  __GI___pthread_mutex_lock (mutex=0x1e0) at pthread_mutex_lock.c:50
        type = <optimized out>
        id = <optimized out>
#1  0x00007ffff07bed38 in lock (this=<optimized out>) at /usr/include/boost/thread/pthread/mutex.hpp:67
        res = <optimized out>
#2  boost::unique_lock<boost::mutex>::lock (this=this@entry=0x7fffdab1c840) at /usr/include/boost/thread/lock_types.hpp:344
No locals.
#3  0x00007ffff06f8fd1 in unique_lock (m_=..., this=0x7fffdab1c840) at /usr/include/boost/thread/lock_types.hpp:124
No locals.
#4  icinga::Checkable::RegisterDowntime (this=0x0, downtime=...) at ../icinga/checkable-downtime.cpp:74
        lock = {m = 0x1e0, is_locked = false}
#5  0x00007ffff07995f8 in icinga::Downtime::Start (this=0x7fffb039c010, runtimeCreated=<optimized out>) at ../icinga/downtime.cpp:121
        checkable = {px = 0x0}
#6  0x00007ffff717504e in icinga::ConfigObject::Activate (this=0x7fffb039c010, runtimeCreated=<optimized out>) at ../base/configobject.cpp:390
        currentContextFrame = {<No data fields>}
#7  0x00007ffff717976a in operator() (this=0x7fffdab1cbc0) at /usr/include/boost/function/function_template.hpp:767
No locals.
#8  icinga::WorkQueue::WorkerThreadProc (this=0x7ffff7f10d30) at ../base/workqueue.cpp:211
        task = {<boost::function0<void>> = {<boost::function_base> = {
              vtable = 0x7ffff7083c00 <void boost::function0<void>::assign_to<boost::_bi::bind_t<void, boost::_mfi::mf1<void, icinga::ConfigObject, bool>, boost::_bi::list2<boost::_bi::value<boost::intrusive_ptr<icinga::ConfigObject> >, boost::_bi::value<bool> > > >(boost::_bi::bind_t<void, boost::_mfi::mf1<void, icinga::ConfigObject, bool>, boost::_bi::list2<boost::_bi::value<boost::intrusive_ptr<icinga::ConfigObject> >, boost::_bi::value<bool> > >)::stored_vtable>, functor = {obj_ptr = 0x7fffc030c020, type = {type = 0x7fffc030c020, const_qualified = 136, 
                  volatile_qualified = 184}, func_ptr = 0x7fffc030c020, bound_memfunc_ptr = {memfunc_ptr = (void (boost::detail::function::X::*)(boost::detail::function::X * const, 
    int)) 0x7fffc030c020, this adjustment 10401928, obj_ptr = 0x7fff00000004}, obj_ref = {obj_ptr = 0x7fffc030c020, is_const_qualified = 136, is_volatile_qualified = 184}, data = 32 ' '}}, 
            static args = <optimized out>, static arity = <optimized out>}, <No data fields>}
        idbuf = {<std::basic_ostream<char, std::char_traits<char> >> = {<std::basic_ios<char, std::char_traits<char> >> = {<std::ios_base> = {
                _vptr.ios_base = 0x6216c0 <vtable for std::basic_ostringstream<char, std::char_traits<char>, std::allocator<char> >+64>, static boolalpha = std::_S_boolalpha, 
                static dec = std::_S_dec, static fixed = std::_S_fixed, static hex = std::_S_hex, static internal = std::_S_internal, static left = std::_S_left, static oct = std::_S_oct, 
                static right = std::_S_right, static scientific = std::_S_scientific, static showbase = std::_S_showbase, static showpoint = std::_S_showpoint, 
                static showpos = std::_S_showpos, static skipws = std::_S_skipws, static unitbuf = std::_S_unitbuf, static uppercase = std::_S_uppercase, 
                static adjustfield = std::_S_adjustfield, static basefield = std::_S_basefield, static floatfield = std::_S_floatfield, static badbit = std::_S_badbit, 
                static eofbit = std::_S_eofbit, static failbit = std::_S_failbit, static goodbit = std::_S_goodbit, static app = std::_S_app, static ate = std::_S_ate, 
                static binary = std::_S_bin, static in = std::_S_in, static out = std::_S_out, static trunc = std::_S_trunc, static beg = std::_S_beg, static cur = std::_S_cur, 
                static end = std::_S_end, _M_precision = 6, _M_width = 0, _M_flags = 4098, _M_exception = std::_S_goodbit, _M_streambuf_state = std::_S_goodbit, _M_callbacks = 0x0, 
                _M_word_zero = {_M_pword = 0x0, _M_iword = 0}, _M_local_word = {{_M_pword = 0x0, _M_iword = 0}, {_M_pword = 0x0, _M_iword = 0}, {_M_pword = 0x0, _M_iword = 0}, {_M_pword = 0x0, 
                    _M_iword = 0}, {_M_pword = 0x0, _M_iword = 0}, {_M_pword = 0x0, _M_iword = 0}, {_M_pword = 0x0, _M_iword = 0}, {_M_pword = 0x0, _M_iword = 0}}, _M_word_size = 8, 
                _M_word = 0x7fffdab1ccd8, _M_ios_locale = {static none = 0, static ctype = 1, static numeric = 2, static collate = 4, static time = 8, static monetary = 16, 
                  static messages = 32, static all = 63, _M_impl = 0x7ffff5265e00 <(anonymous namespace)::c_locale_impl>, static _S_classic = 
    0x7ffff5265e00 <(anonymous namespace)::c_locale_impl>, static _S_global = 0x7ffff5265e00 <(anonymous namespace)::c_locale_impl>, static _S_categories = 
    0x7ffff5249900 <__gnu_cxx::category_names>, static _S_once = 2}}, _M_tie = 0x0, _M_fill = 32 ' ', _M_fill_init = true, _M_streambuf = 0x7fffdab1cc48, _M_ctype = 
    0x7ffff5265960 <(anonymous namespace)::ctype_c>, _M_num_put = 0x7ffff52658f0 <(anonymous namespace)::num_put_c>, _M_num_get = 0x7ffff5265900 <(anonymous namespace)::num_get_c>}, 
            _vptr.basic_ostream = 0x621698 <vtable for std::basic_ostringstream<char, std::char_traits<char>, std::allocator<char> >+24>}, 
          _M_stringbuf = {<std::basic_streambuf<char, std::char_traits<char> >> = {
              _vptr.basic_streambuf = 0x621550 <vtable for std::basic_stringbuf<char, std::char_traits<char>, std::allocator<char> >+16>, _M_in_beg = 0x7fffc00008f9 "Q #8", 
              _M_in_cur = 0x7fffc00008f9 "Q #8", _M_in_end = 0x7fffc00008f9 "Q #8", _M_out_beg = 0x7fffc00008f8 "WQ #8", _M_out_cur = 0x7fffc00008fd "", _M_out_end = 0x7fffc0000af8 "", 
              _M_buf_locale = {static none = 0, static ctype = 1, static numeric = 2, static collate = 4, static time = 8, static monetary = 16, static messages = 32, static all = 63, 
                _M_impl = 0x7ffff5265e00 <(anonymous namespace)::c_locale_impl>, static _S_classic = 0x7ffff5265e00 <(anonymous namespace)::c_locale_impl>, 
                static _S_global = 0x7ffff5265e00 <(anonymous namespace)::c_locale_impl>, static _S_categories = 0x7ffff5249900 <__gnu_cxx::category_names>, static _S_once = 2}}, 
            _M_mode = std::_S_out, _M_string = "W"}}
        lock = {m = 0x7ffff7f10d40, is_locked = false}
#9  0x00007ffff7bd124a in boost::(anonymous namespace)::thread_proxy (param=<optimized out>) at libs/thread/src/pthread/thread.cpp:165
        thread_info = {px = 0x7fffdc003370, pn = {pi_ = 0x7fffdc001080}}
        lock = <optimized out>
#10 0x00007ffff426adf5 in start_thread (arg=0x7fffdab1d700) at pthread_create.c:308
        __res = <optimized out>
        pd = 0x7fffdab1d700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140736862476032, -2191255536771507488, 1, 140736862476736, 140736862476032, 18, 2191192333668604640, 2191266199639841504}, 
              mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
#11 0x00007ffff477d1ad in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
No locals.