SDIFF iterator misuse bug regression test added.
SDIFF iterator misuse bug regression test added.

See commit c00453d for more info about the bug.

nandhanurrevanth/redis,janeasystems/redis,Cybermaxs/redis,powerumc/MyRedis,Jonavin/redis,enginekit/redis,jqk6/redis,quangnguyen90/redis,crask/redis-cutter,hanmichael/redis,miminus/redis,jaambee/redis,adamweixuan/redis,miminus/redis,liqiang199105/redis,enginekit/redis,jaambee/redis,damy/redis,laurencee/redis,ScottKaiGu/redis,erwin00776/redis-2.8-optimize,kts12345/redis,janeasystems/redis,upsoft/redis,oaastest/redis,kolonse/redis,powerumc/MyRedis,enginekit/redis,ScottKaiGu/redis,jaambee/redis,damy/redis,ideaar/redis,oaastest/redis,jqk6/redis,nandhanurrevanth/redis,LittlePeng/redis,sidsen/redis,upsoft/redis,fanxu/redis,quangnguyen90/redis,jacklee0810/redis,alpha8/redis,kolonse/redis,hanmichael/redis,jacklee0810/redis,janeasystems/redis,kolonse/redis,kts12345/redis,jqk6/redis,adamweixuan/redis,ScottKaiGu/redis,erwin00776/redis-2.8-optimize,StartTheShift/redis-shift,fanxu/redis,ideaar/redis,Cybermaxs/redis,janeasystems/redis,miminus/redis,shanegxxiao/redis,kolonse/redis,LittlePeng/redis,jqk6/redis,Cybermaxs/redis,jqk6/redis,enginekit/redis,shanegxxiao/redis,alpha8/redis,quangnguyen90/redis,liqiang199105/redis,LittlePeng/redis,powerumc/MyRedis_old,oaastest/redis,nandhanurrevanth/redis,alpha8/redis,ScottKaiGu/redis,laurencee/redis,crask/redis-cutter,jaambee/redis,quangnguyen90/redis,Cybermaxs/redis,hanmichael/redis,shanegxxiao/redis,upsoft/redis,Cybermaxs/redis,sidsen/redis,erwin00776/redis-2.8-optimize,jaambee/redis,Jonavin/redis,damy/redis,Jonavin/redis,upsoft/redis,kts12345/redis,sidsen/redis,sidsen/redis,ideaar/redis,miminus/redis,laurencee/redis,oaastest/redis,shanegxxiao/redis,liqiang199105/redis,fanxu/redis,ScottKaiGu/redis,shanegxxiao/redis,kts12345/redis,StartTheShift/redis-shift,quangnguyen90/redis,adamweixuan/redis,upsoft/redis,powerumc/MyRedis_old,StartTheShift/redis-shift,ideaar/redis,oaastest/redis,ideaar/redis,janeasystems/redis,erwin00776/redis-2.8-optimize,adamweixuan/redis,sidsen/redis,powerumc/MyRedis_old,hanmichael/redis,kts12345/redis,jacklee0810/redis,fanxu/redis,alpha8/redis,nandhanurrevanth/redis,enginekit/redis,crask/redis-cutter,jacklee0810/redis,sidsen/redis,Jonavin/redis,liqiang199105/redis,powerumc/MyRedis,powerumc/MyRedis_old,alpha8/redis,kolonse/redis,damy/redis,damy/redis,jacklee0810/redis,liqiang199105/redis,laurencee/redis,nandhanurrevanth/redis,Jonavin/redis,hanmichael/redis,adamweixuan/redis,miminus/redis,laurencee/redis