Some debugging in `econtext_invariance`
Some debugging in `econtext_invariance`

FStarLang/FStar,YaccConstructor/FStar,A-Manning/FStar,YaccConstructor/FStar,A-Manning/FStar,aa755/FStar,aa755/FStar,YaccConstructor/FStar,FStarLang/FStar,FStarLang/FStar,msprotz/FStar,MallabaevAzamat/FStar,aa755/FStar,A-Manning/FStar,MallabaevAzamat/FStar,aa755/FStar,MallabaevAzamat/FStar,msprotz/FStar,YaccConstructor/FStar,hoheinzollern/FStar,hoheinzollern/FStar,msprotz/FStar,hoheinzollern/FStar,msprotz/FStar,MallabaevAzamat/FStar,hoheinzollern/FStar