#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
  [Error: raise.c was not found in source tree]
#1  0x00007fe590a44535 in __GI_abort () at abort.c:79
  [Error: abort.c was not found in source tree]
#2  0x00007fe590c645ef in isc_assertion_failed (file=file@entry=0x7fe590cb769c "../../../lib/isc/timer.c", line=line@entry=392, type=type@entry=isc_assertiontype_require, cond=cond@entry=0x7fe590cb0103 "task != ((void *)0)") at ../../../lib/isc/assertions.c:52
  47: void
  48: isc_assertion_failed(const char *file, int line, isc_assertiontype_t type,
  49: 		     const char *cond)
  50: {
  51: 	isc_assertion_failed_cb(file, line, type, cond);
  52: 	abort();
  53: 	/* NOTREACHED */
  54: }
  55: 
  56: /*% Set callback. */
  57: void
#3  0x00007fe590c9245a in isc__timer_create (manager0=0x7fe58d741010, type=<optimized out>, expires=<optimized out>, interval=<optimized out>, task=0x0, action=0x55bcf1af75c0 <connect_timeout>, arg=0x7fe58d74e018, timerp=0x7fe58d74e288) at ../../../lib/isc/timer.c:457
  452: 	timer->index = 0;
  453: 	result = isc_mutex_init(&timer->lock);
  454: 	if (result != ISC_R_SUCCESS) {
  455: 		isc_task_detach(&timer->task);
  456: 		isc_mem_put(manager->mctx, timer, sizeof(*timer));
  457: 		return (result);
  458: 	}
  459: 	ISC_LINK_INIT(timer, link);
  460: 	timer->common.impmagic = TIMER_MAGIC;
  461: 	timer->common.magic = ISCAPI_TIMER_MAGIC;
  462: 	timer->common.methods = (isc_timermethods_t *)&timermethods;
#4  0x000055bcf1aef75a in bringup_timer (query=0x7fe58d74e018, default_timeout=<optimized out>) at ../../../bin/dig/dighost.c:2949
  2944: 	}
  2945: 	debug("have local timeout of %d", local_timeout);
  2946: 	isc_interval_set(&l->interval, local_timeout, 0);
  2947: 	if (query->timer != NULL)
  2948: 		isc_timer_detach(&query->timer);
  2949: 	result = isc_timer_create(timermgr, isc_timertype_once, NULL,
  2950: 				  &l->interval, global_task, connect_timeout,
  2951: 				  query, &query->timer);
  2952: 	check_result(result, "isc_timer_create");
  2953: }
  2954: 
#5  0x000055bcf1af6e22 in send_udp (query=0x7fe58d74e018) at ../../../bin/dig/dighost.c:3135
  3130: 	dig_query_t *next;
  3131: 
  3132: 	debug("send_udp(%p)", query);
  3133: 
  3134: 	l = query->lookup;
  3135: 	bringup_timer(query, UDP_TIMEOUT);
  3136: 	l->current_query = query;
  3137: 	debug("working on lookup %p, query %p", query->lookup, query);
  3138: 	if (!query->recv_made) {
  3139: 		/* XXX Check the sense of this, need assertion? */
  3140: 		query->waiting_connect = ISC_FALSE;
#6  0x000055bcf1af76c5 in connect_timeout (task=<optimized out>, event=<optimized out>) at ../../../bin/dig/dighost.c:3265
  3260: 
  3261: 	if (l->retries > 1) {
  3262: 		if (!l->tcp_mode) {
  3263: 			l->retries--;
  3264: 			debug("resending UDP request to first server");
  3265: 			send_udp(ISC_LIST_HEAD(l->q));
  3266: 		} else {
  3267: 			debug("making new TCP request, %d tries left",
  3268: 			      l->retries);
  3269: 			l->retries--;
  3270: 			requeue_lookup(l, ISC_TRUE);
#7  0x00007fe590c8c439 in dispatch (manager=0x7fe58d73f010) at ../../../lib/isc/task.c:1141
  1136: 							    ISC_MSGSET_TASK,
  1137: 							    ISC_MSG_EXECUTE,
  1138: 							    "execute action"));
  1139: 					if (event->ev_action != NULL) {
  1140: 						UNLOCK(&task->lock);
  1141: 						(event->ev_action)(
  1142: 							(isc_task_t *)task,
  1143: 							event);
  1144: 						LOCK(&task->lock);
  1145: 					}
  1146: 					dispatch_count++;
#8  run (uap=0x7fe58d73f010) at ../../../lib/isc/task.c:1313
  1308: 	isc__taskmgr_t *manager = uap;
  1309: 
  1310: 	XTHREADTRACE(isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
  1311: 				    ISC_MSG_STARTING, "starting"));
  1312: 
  1313: 	dispatch(manager);
  1314: 
  1315: 	XTHREADTRACE(isc_msgcat_get(isc_msgcat, ISC_MSGSET_GENERAL,
  1316: 				    ISC_MSG_EXITING, "exiting"));
  1317: 
  1318: #ifdef OPENSSL_LEAKS
#9  0x00007fe590c14164 in start_thread (arg=<optimized out>) at pthread_create.c:486
  [Error: pthread_create.c was not found in source tree]
#10 0x00007fe590b3cdef in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
  [Error: clone.S was not found in source tree]