address PR feedback

Author: mccanne

sio/csvio/reader.go

@@ -120,7 +120,7 @@ func convertString(s string) any {
 
 func validate(strings []string) bool {
 	for _, s := range strings {
-		if !utf8.Valid([]byte(s)) {
+		if !utf8.ValidString(s) {
 			return false
 		}
 	}

sup/marshal.go

@@ -732,16 +732,11 @@ func (u *UnmarshalBSUPContext) decodeAny(val super.Value, v reflect.Value) (x er
 		if !ok || fusionType.Type != super.TypeAll {
 			return errors.New("super value is not type fusion(all)")
 		}
-		it := val.Bytes().Iter()
-		bytes := it.Next()
 		//XXX
 		if u.sctx == nil {
 			u.sctx = super.NewContext()
 		}
-		typ, err := u.sctx.LookupByValue(it.Next())
-		if err != nil {
-			return err
-		}
+		bytes, typ := fusionType.Deref(u.sctx, val.Bytes())
 		val := super.NewValue(typ, bytes)
 		v.Set(reflect.ValueOf(val.Copy()))
 		return nil