Make chainconfig wrapper more robust against differences between types

plugins/wrappers/wrappers.go

@@ -606,11 +606,15 @@ func (b *Backend) ChainConfig() *params.ChainConfig {
 		field := ntype.Field(i)
 		v := nval.Elem().FieldByName(field.Name)
 		lv := lval.Elem().FieldByName(field.Name)
+		log.Info("Checking value for", "field", field.Name)
+		if lv.Kind() != reflect.Invalid {
+			// If core.ChainConfig doesn't have this field, skip it.
 			if v.Type() == lv.Type() && lv.CanSet() {
 				lv.Set(v)
 			} else {
 				convertAndSet(lv, v)
 			}
 		}
+	}
 	return b.chainConfig
 }