LUCENE-5207: try a hack around antlr hashmap bugs

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene5207@1523057 13f79535-47bb-0310-9956-ffa450edef68

lucene/expressions/build.xml

@@ -98,6 +98,8 @@
       <property name="-grammar.relative.path" location="${grammar.path}" relative="true"/>
       <replace-value property="grammar.relative.path" value="${-grammar.relative.path}${file.separator}" from="${file.separator}" to="/"/>
       <java classname="org.antlr.Tool" fork="true" failonerror="true" classpathref="antlr.classpath" taskname="antlr">
+        <!-- this is a hack because antlr generates code comments in nondeterministic order (using hashmap somewhere it should use linkedhashmap) -->
+        <sysproperty key="jdk.map.althashing.threshold" value="-1"/>
         <arg value="-verbose"/>
         <arg value="-make"/>
         <arg value="-o"/>

lucene/expressions/src/java/org/apache/lucene/expressions/js/JavascriptParser.java

@@ -1569,7 +1569,7 @@ class JavascriptParser extends Parser {
 
           stream_arguments.add(arguments48.getTree());
           // AST REWRITE
-          // elements: ID, arguments
+          // elements: arguments, ID
           // token labels: 
           // rule labels: retval
           // token list labels: