3710. [bug] Address double dns_zone_detach when switching to

using automatic empty zones from regular zones.
                        [RT #35177]

bin/tests/system/emptyzones/tests.sh

@@ -0,0 +1,35 @@
+#!/bin/sh
+#
+# Copyright (C) 2014  Internet Systems Consortium, Inc. ("ISC")
+#
+# Permission to use, copy, modify, and/or distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+# REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+# AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+# LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+# OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+# PERFORMANCE OF THIS SOFTWARE.
+
+SYSTEMTESTTOP=..
+. $SYSTEMTESTTOP/conf.sh
+
+status=0
+n=0
+
+n=`expr $n + 1`
+echo "I:check that switching to automatic empty zones works ($n)"
+ret=0
+$RNDC -c ../common/rndc.conf -s 10.53.0.1 -p 9953 reload > /dev/null || ret=1
+sleep 5
+cp ns1/named2.conf ns1/named.conf
+$RNDC -c ../common/rndc.conf -s 10.53.0.1 -p 9953 reload > /dev/null || ret=1
+sleep 5
+$DIG +vc version.bind txt ch @10.53.0.1 -p 5300 > /dev/null || ret=1
+if [ $ret != 0 ]; then echo "I:failed"; fi
+status=`expr $status + $ret`
+
+exit $status