.
Thread 2 (Thread 0x7f57cae52700 (LWP 2704)):
#0  __lll_unlock_wake () at ../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:371
No locals.
#1  0x00007f57cfc1e9af in __pthread_mutex_unlock_usercnt (decr=1, mutex=mutex@entry=0x5575e3793720) at pthread_mutex_unlock.c:55
        type = <optimized out>
#2  __GI___pthread_mutex_unlock (mutex=mutex@entry=0x5575e3793720) at pthread_mutex_unlock.c:347
No locals.
#3  0x00007f57d053293d in poll_func (ufds=0x7f57c4000b10, nfds=2, timeout=0, userdata=0x5575e3793720) at thread-watch.c:55
        mutex = 0x5575e3793720
#4  0x00007f57d05324d3 in avahi_simple_poll_run (s=0x5575e38ec210) at simple-watch.c:527
        s = 0x5575e38ec210
#5  0x00007f57d05326a8 in avahi_simple_poll_iterate (s=0x5575e38ec210, timeout=<optimized out>) at simple-watch.c:602
        r = <optimized out>
#6  0x00007f57d05328dd in avahi_simple_poll_loop (s=0x5575e38ec210) at simple-watch.c:646
        r = <optimized out>
        __PRETTY_FUNCTION__ = "avahi_simple_poll_loop"
#7  0x00007f57d05329a4 in thread (userdata=0x5575e3793710) at thread-watch.c:71
        p = 0x5575e3793710
        mask = {__val = {18446744067267100671, 18446744073709551615 <repeats 15 times>}}
#8  0x00007f57cfc1a7fc in start_thread (arg=0x7f57cae52700) at pthread_create.c:465
        pd = 0x7f57cae52700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140015042897664, 671502843684696473, 140736136161774, 140736136161775, 140015042897664, 140015042898368, -576956024479698535, -576962387287101031}, 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>
        __PRETTY_FUNCTION__ = "start_thread"
#9  0x00007f57cf947b0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
No locals.
.
Thread 1 (Thread 0x7f57d1406040 (LWP 1457)):
#0  avahi_entry_group_free (group=0x0) at entrygroup.c:242
        client = <optimized out>
        r = <optimized out>
        __PRETTY_FUNCTION__ = "avahi_entry_group_free"
#1  0x00005575e1ba3b10 in dnssdDeregisterInstance (srv=srv@entry=0x5575e37a8420, from_callback=from_callback@entry=0) at dirsvc.c:684
No locals.
#2  0x00005575e1ba3b72 in dnssdDeregisterInstance (from_callback=0, srv=0x5575e37a8420) at dirsvc.c:712
No locals.
#3  dnssdDeregisterPrinter (p=0x5575e37a7c40, clear_name=clear_name@entry=1, from_callback=from_callback@entry=0) at dirsvc.c:712
No locals.
#4  0x00005575e1ba3be8 in dnssdDeregisterAllPrinters (from_callback=from_callback@entry=0) at dirsvc.c:657
        p = <optimized out>
#5  0x00005575e1ba4e7f in dnssdDeregisterAllPrinters (from_callback=0) at dirsvc.c:650
No locals.
#6  cupsdStopBrowsing () at dirsvc.c:263
No locals.
#7  0x00005575e1bc0f45 in cupsdStopServer () at server.c:107
No locals.
#8  0x00005575e1b903c6 in main (argc=<optimized out>, argv=<optimized out>) at main.c:1158
        i = 2
        opt = <optimized out>
        close_all = <optimized out>
        disconnect = <optimized out>
        fg = <optimized out>
        run_as_child = <optimized out>
        print_profile = <optimized out>
        fds = -1
        con = <optimized out>
        job = <optimized out>
        lis = <optimized out>
        current_time = <optimized out>
        activity = <optimized out>
        senddoc_time = 1508443000
        expire_time = 1508443000
        report_time = 1508443000
        event_time = 1508440111
        timeout = <optimized out>
        limit = {rlim_cur = 4096, rlim_max = 4096}
        action = {__sigaction_handler = {sa_handler = 0x5575e1ba5f60 <sigterm_handler>, sa_sigaction = 0x5575e1ba5f60 <sigterm_handler>}, sa_mask = {__val = {81920, 0 <repeats 15 times>}}, sa_flags = 0, sa_restorer = 0x0}
        netif_time = 1508443000
        service_idle_exit = <optimized out>