Use ShallowNext instead of manually doing key = append(key, 0)
Use ShallowNext instead of manually doing key = append(key, 0)

Fixes #4424

maxlang/cockroach,bg451/cockroach,arjun4084346/cockroach,vaibhavarora/cockroach,petermattis/cockroach,glycerine/cockroach,maxlang/cockroach,cockroachdb/cockroach,sunya123/cockroach,paperstreet/cockroach,paperstreet/cockroach,petermattis/cockroach,vaibhavarora/cockroach,glycerine/cockroach,vivekmenezes/cockroach,veteranlu/cockroach,cockroachdb/cockroach,vivekmenezes/cockroach,cockroachdb/cockroach,vaibhavarora/cockroach,arjun4084346/cockroach,cockroachdb/cockroach,paperstreet/cockroach,arjun4084346/cockroach,vaibhavarora/cockroach,vivekmenezes/cockroach,paperstreet/cockroach,veteranlu/cockroach,arjun4084346/cockroach,glycerine/cockroach,sunya123/cockroach,vivekmenezes/cockroach,maxlang/cockroach,petermattis/cockroach,bg451/cockroach,bg451/cockroach,bg451/cockroach,maxlang/cockroach,petermattis/cockroach,vivekmenezes/cockroach,cockroachdb/cockroach,veteranlu/cockroach,sunya123/cockroach,arjun4084346/cockroach,glycerine/cockroach,paperstreet/cockroach,veteranlu/cockroach,vaibhavarora/cockroach,arjun4084346/cockroach,maxlang/cockroach,cockroachdb/cockroach,paperstreet/cockroach,vivekmenezes/cockroach,petermattis/cockroach,veteranlu/cockroach,glycerine/cockroach,sunya123/cockroach,veteranlu/cockroach,glycerine/cockroach,arjun4084346/cockroach,maxlang/cockroach,sunya123/cockroach,vaibhavarora/cockroach,bg451/cockroach,cockroachdb/cockroach,bg451/cockroach,vaibhavarora/cockroach,paperstreet/cockroach,veteranlu/cockroach,glycerine/cockroach,cockroachdb/cockroach,bg451/cockroach,maxlang/cockroach,petermattis/cockroach,vivekmenezes/cockroach,veteranlu/cockroach,vaibhavarora/cockroach,glycerine/cockroach,sunya123/cockroach,sunya123/cockroach,vivekmenezes/cockroach,petermattis/cockroach,petermattis/cockroach,paperstreet/cockroach,arjun4084346/cockroach,maxlang/cockroach,sunya123/cockroach