Fix object subscript test to save buffer.
Fix object subscript test to save buffer.

kishikawakatsumi/UICKeyChainStore,imjerrybao/UICKeyChainStore,v2dev/UICKeyChainStore,hanhailong/UICKeyChainStore,kishikawakatsumi/UICKeyChainStore,TomoakiNagahara/UICKeyChainStore,gauravds/UICKeyChainStore,hulu001/UICKeyChainStore,Ninikitos/UICKeyChainStore,bigrpg/UICKeyChainStore,HSFGitHub/UICKeyChainStore,dezinezync/UICKeyChainStore,dleehr/UICKeyChainStore,royalwang/UICKeyChainStore,Kingside/UICKeyChainStore