Outer join and two like constrain results NPE

SELECT 
FROM [test:Parent] as p 
LEFT OUTER JOIN [test:Child] as c ON ISCHILDNODE(c, p) 
WHERE 
 p.[test:parentName] like 'name2%' or c.[test:childName] like 'name2%'

java.lang.NullPointerException
	at org.modeshape.jcr.query.process.SelectComponent$17.satisfiesConstraints(SelectComponent.java:361)
	at org.modeshape.jcr.query.process.SelectComponent$1.satisfiesConstraints(SelectComponent.java:159)
	at org.modeshape.jcr.query.process.SelectComponent.execute(SelectComponent.java:99)
	at org.modeshape.jcr.query.process.ProjectComponent.execute(ProjectComponent.java:43)
	at org.modeshape.jcr.query.process.QueryProcessor.execute(QueryProcessor.java:100)
	at org.modeshape.jcr.query.process.QueryEngine.execute(QueryEngine.java:140)
	at org.modeshape.jcr.query.lucene.LuceneQueryEngine$1.getResults(LuceneQueryEngine.java:163)
	at org.modeshape.jcr.query.JcrQuery.execute(JcrQuery.java:123)
	at org.modeshape.jcr.query.JcrQuery.execute(JcrQuery.java:52)

protected static Pattern createRegexFromLikeExpression( String likeExpression ) {
   return null;
}

protected static Pattern createRegexFromLikeExpression( String likeExpression ) {
  return Pattern.compile(CompareStringQuery.toRegularExpression(likeExpression));
}