Assertion in OSDNSLookup

#0  0x00002aaaae80c625 in *__GI_raise (sig=<optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#1  0x00002aaaae80dd8d in *__GI_abort () at abort.c:121
#2  0x00002aaaab993db2 in ink_die_die_die () at ink_error.cc:43
#3  ink_fatal_va (fmt=0x2aaaab9a0cef "%s:%d: failed assert `%s`", ap=ap@entry=0x2aaaab0608d8) at ink_error.cc:65
#4  0x00002aaaab993e4b in ink_fatal (message_format=message_format@entry=0x2aaaab9a0cef "%s:%d: failed assert `%s`") at ink_error.cc:73
#5  0x00002aaaab992025 in _ink_assert (expression=<optimized out>, file=<optimized out>, line=<optimized out>) at ink_assert.cc:37
#6  0x00002aaaaacc2f70 in HttpTransact::OSDNSLookup (s=0x2ae8282bf470) at HttpTransact.cc:1701
#7  0x00002aaaaac89b8e in HttpSM::call_transact_and_set_next_state (this=0x2ae8282bf400, f=<optimized out>) at HttpSM.cc:7079
#8  0x00002aaaaac8dd50 in HttpSM::state_hostdb_lookup (this=0x2ae8282bf400, event=500, data=0x0) at HttpSM.cc:2219
#9  0x00002aaaaac9cc3d in HttpSM::main_handler (this=0x2ae8282bf400, event=500, data=0x0) at HttpSM.cc:2661
#10 0x00002aaaaad8b4d7 in HostDBContinuation::dnsEvent (this=0x2ae86a659390, event=2, e=0x2ae854fd2d60) at HostDB.cc:1428
#11 0x00002aaaaae8b4d0 in Continuation::handleEvent (data=0x2ae854fd2d60, event=2, this=<optimized out>) at I_Continuation.h:153
#12 EThread::process_event (this=0x2aaab1907000, e=0x2ae854fd2d60, calling_code=2) at UnixEThread.cc:148
#13 0x00002aaaaae8c3d1 in EThread::execute (this=0x2aaab1907000) at UnixEThread.cc:230
#14 0x00002aaaaae8aea6 in spawn_thread_internal (a=0x2aaab0b259a0) at Thread.cc:86
#15 0x00002aaaad6b9aa1 in start_thread (arg=0x2aaaab061700) at pthread_create.c:301
#16 0x00002aaaae8c293d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115