(gdb) bt full
#0  __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44
        tid = <optimized out>
        ret = 0
        pd = <optimized out>
        old_mask = {__val = {11}}
        ret = <optimized out>
#1  0x00007ff96159a8a3 in __pthread_kill_internal (signo=6, threadid=<optimized out>) at pthread_kill.c:78
#2  0x00007ff96154a668 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
        ret = <optimized out>
#3  0x00007ff9615324b8 in __GI_abort () at abort.c:79
        save_stage = 1
        act = {__sigaction_handler = {sa_handler = 0x20, sa_sigaction = 0x20}, sa_mask = {__val = {140709020100472, 258, 140709020100216, 140707415166688, 140707415166656, 140707415166671, 140707415166698, 93845568533152, 140709060221611, 140707415166640, 140709060441496, 140707415166688, 140707415166656, 140707415166656, 15, 2334386758209003846}}, sa_flags = 1755628358, sa_restorer = 0x7ff8ff7f8ee0}
#4  0x00007ff9618dd3b2 in std::__glibcxx_assert_fail(char const*, int, char const*, char const*)
    (file=<optimized out>, line=<optimized out>, function=<optimized out>, condition=<optimized out>) at /usr/src/debug/gcc/gcc/libstdc++-v3/src/c++11/debug.cc:61
#5  0x00007ff95f0aaad0 in vdrlive::RecordingsItemPtrCompare::ByAscendingNameSort(std::shared_ptr<vdrlive::RecordingsItemDir> const&, std::shared_ptr<vdrlive::RecordingsItemDir> const&) () at /usr/lib/vdr/plugins/libvdr-live.so.2.6.5
#6  0x00007ff95f0abfac in vdrlive::RecordingsItemPtrCompare::ByAscendingNameDescSort(std::shared_ptr<vdrlive::RecordingsItemRec> const&, std::shared_ptr<vdrlive::RecordingsItemRec> const&) () at /usr/lib/vdr/plugins/libvdr-live.so.2.6.5
#7  0x00007ff95f0bc12c in void std::__introsort_loop<__gnu_cxx::__normal_iterator<std::shared_ptr<vdrlive::RecordingsItemRec>*, std::vector<std::shared_ptr<vdrlive::RecordingsItemRec>, std::allocator<std::shared_ptr<vdrlive::RecordingsItemRec> > > >, long, __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(std::shared_ptr<vdrlive::RecordingsItemRec> const&, std::shared_ptr<vdrlive::RecordingsItemRec> const&)> >(__gnu_cxx::__normal_iterator<std::shared_ptr<vdrlive::RecordingsItemRec>*, std::vector<std::shared_ptr<vdrlive::RecordingsItemRec>, std::allocator<std::shared_ptr<vdrlive::RecordingsItemRec> > > >, __gnu_cxx::__normal_iterator<std::shared_ptr<vdrlive::RecordingsItemRec>*, std::vector<std::shared_ptr<vdrlive::RecordingsItemRec>, std::allocator<std::shared_ptr<vdrlive::RecordingsItemRec> > > >, long, __gnu_cxx::__ops::_Iter_comp_iter<bool (*)(std::shared_ptr<vdrlive::RecordingsItemRec> const&, std::shared_ptr<vdrlive::RecordingsItemRec> const&)>) () at /usr/lib/vdr/plugins/libvdr-live.so.2.6.5
#8  0x00007ff95f0b1459 in vdrlive::RecordingsItemDir::getRecordings(vdrlive::eSortOrder) () at /usr/lib/vdr/plugins/libvdr-live.so.2.6.5
#9  0x00007ff95f125b74 in  () at /usr/lib/vdr/plugins/libvdr-live.so.2.6.5
#10 0x00007ff95f125a4e in  () at /usr/lib/vdr/plugins/libvdr-live.so.2.6.5
#11 0x00007ff95f125a4e in  () at /usr/lib/vdr/plugins/libvdr-live.so.2.6.5
#12 0x00007ff95f125a4e in  () at /usr/lib/vdr/plugins/libvdr-live.so.2.6.5
#13 0x00007ff95f12669d in  () at /usr/lib/vdr/plugins/libvdr-live.so.2.6.5
#14 0x00007ff95f12ff42 in  () at /usr/lib/vdr/plugins/libvdr-live.so.2.6.5
#15 0x00007ff95efccad8 in tnt::Worker::dispatch(tnt::HttpRequest&, tnt::HttpReply&) () at /usr/lib/libtntnet.so.13
#16 0x00007ff95efd24e1 in tnt::Worker::processRequest(tnt::HttpRequest&, std::basic_iostream<char, std::char_traits<char> >&, unsigned int) () at /usr/lib/libtntnet.so.13
#17 0x00007ff95efd2f37 in tnt::Worker::run() () at /usr/lib/libtntnet.so.13
#18 0x00007ff95efd370a in cxxtools::DetachedThread::exec() () at /usr/lib/libtntnet.so.13
#19 0x00007ff95eda3774 in  () at /usr/lib/libcxxtools.so.10
#20 0x00007ff9615989eb in start_thread (arg=<optimized out>) at pthread_create.c:444
--Type <RET> for more, q to quit, c to continue without paging--c
        ret = <optimized out>
        pd = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140709056841488, 8742076772369214454, -368, 2, 140707675228720, 140707406798848, -8744892620636771338, -8745750564716499978}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
#21 0x00007ff96161c7cc in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78
(gdb)