make/src/classes/build/tools/tzdb/ZoneRules.java

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this

@@ -230,11 +230,11 @@
      * @throws IOException if an error occurs
      */
     static void writeRule(ZoneOffsetTransitionRule rule, DataOutput out) throws IOException {
         int month = rule.getMonth().getValue();
         byte dom = (byte)rule.getDayOfMonthIndicator();
-        int dow = rule.getDayOfWeek().getValue();
+        int dow = (rule.getDayOfWeek() == null ? -1 : rule.getDayOfWeek().getValue());
         LocalTime time = rule.getLocalTime();
         boolean timeEndOfDay = rule.isMidnightEndOfDay();
         TimeDefinition timeDefinition = rule.getTimeDefinition();
         ZoneOffset standardOffset = rule.getStandardOffset();
         ZoneOffset offsetBefore = rule.getOffsetBefore();