4430. [bug] Lwresd died if a search list was not defined.

Found by 0x710DDDD At Alibaba Security. [RT #42895]

(cherry picked from commit 3146be6fd6)

bin/tests/system/lwresd/tests.sh

@@ -70,5 +70,24 @@ if [ $ret != 0 ]; then
 fi
 status=`expr $status + $ret`
 
+$PERL $SYSTEMTESTTOP/stop.pl . lwresd1
+
+mv lwresd1/lwresd.run lwresd1/lwresd.run.lwresd
+
+$PERL $SYSTEMTESTTOP/start.pl . lwresd1 -- "-m record,size,mctx -c nosearch.conf -d 99 -g"
+
+echo "I:using nosearch.conf"
+ret=0
+for i in 0 1 2 3 4 5 6 7 8 9 
+do
+	grep ' running$' lwresd1/lwresd.run > /dev/null && break
+	sleep 1
+done
+./lwtest -nosearch || ret=1
+if [ $ret != 0 ]; then
+	echo "I:failed"
+fi
+status=`expr $status + $ret`
+
 echo "I:exit status: $status"
 [ $status -eq 0 ] || exit 1