Fixed misundertanding on HyperStack modifies
Fixed misundertanding on HyperStack modifies

YaccConstructor/FStar,A-Manning/FStar,hoheinzollern/FStar,hoheinzollern/FStar,hoheinzollern/FStar,FStarLang/FStar,A-Manning/FStar,FStarLang/FStar,FStarLang/FStar,hoheinzollern/FStar,A-Manning/FStar,YaccConstructor/FStar,YaccConstructor/FStar,YaccConstructor/FStar