Possible race in configure_catz_zone
Appeared once, when running system tests with libfaketime:
#0 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#1 0x00007f3401379535 in __GI_abort () at abort.c:79
#2 0x000055f98610e292 in library_fatal_error (file=0x55f986446038 "./server.c", line=2959, format=0x55f9864bcd8f "RUNTIME_CHECK(%s) failed", args=0x7f33fe634820) at ./main.c:293
#3 0x000055f9863fe605 in isc_error_fatal (file=0x55f986446038 "./server.c", line=2959, format=0x55f9864bcd8f "RUNTIME_CHECK(%s) failed") at error.c:65
#4 0x000055f9863fe645 in isc_error_runtimecheck (file=0x55f986446038 "./server.c", line=2959, expression=0x55f986446d90 "tresult == 0") at error.c:72
#5 0x000055f9861178e5 in configure_catz_zone (view=0x7f33b40900d0, config=0x7f33ebd7f890, element=0x7f33f25e4318) at ./server.c:2959
#6 0x000055f986117cfd in configure_catz (view=0x7f33b40900d0, config=0x7f33ebd7f890, catz_obj=0x7f33b4035cb8) at ./server.c:3056
#7 0x000055f98611a179 in configure_view (view=0x7f33b40900d0, viewlist=0x7f33fe635ab0, config=0x7f33ebd7f890, vconfig=0x0, cachelist=0x7f33fe635ad0, bindkeys=0x0, mctx=0x55f98780d160, actx=0x7f33f25ebff0, need_hints=true) at ./server.c:3888
#8 0x000055f986129c4e in load_configuration (filename=0x55f986534d00 <absolute_conffile> "/home/wpk/dev/isc/bind9/master/bin/tests/system/catz/ns2/named.conf", server=0x7f33fee46020, first_time=false) at ./server.c:8810
#9 0x000055f98612e586 in loadconfig (server=0x7f33fee46020) at ./server.c:10029
#10 0x000055f98612f3fa in named_server_reconfigcommand (server=0x7f33fee46020) at ./server.c:10397
#11 0x000055f986106d5c in named_control_docommand (message=0x7f33b4025150, readonly=false, text=0x7f33fe635ce8) at control.c:241
--Type <RET> for more, q to quit, c to continue without paging--
#12 0x000055f98610878c in control_recvmessage (task=0x7f33fee53020, event=0x7f33f25ef610) at controlconf.c:462
#13 0x000055f986424805 in dispatch (manager=0x7f33fee3d020, threadid=1) at task.c:1128
#14 0x000055f986424e70 in run (queuep=0x55f98781a6b0) at task.c:1295
#15 0x00007f3401548182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#16 0x00007f3401471b1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
tresult is ISC_R_NOTFOUND