WAS NOT ... BY currentUser() causes NullPointerException

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System Error

A system error has occurred.

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   2. cut & paste the error and system information found below
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Cause:
java.lang.NullPointerException

Stack Trace: [hide]

java.lang.NullPointerException
	at org.apache.lucene.search.BooleanQuery.rewrite(BooleanQuery.java:438)
	at org.apache.lucene.search.IndexSearcher.rewrite(IndexSearcher.java:311)
	at org.apache.lucene.search.Query.weight(Query.java:98)
	at org.apache.lucene.search.Searcher.createWeight(Searcher.java:230)
	at org.apache.lucene.search.Searcher.search(Searcher.java:110)
	at com.atlassian.jira.index.DelegateSearcher.search(DelegateSearcher.java:166)
	at com.atlassian.jira.jql.query.WasClauseQueryFactory.create(WasClauseQueryFactory.java:93)
	at com.atlassian.jira.jql.query.QueryVisitor.visit(QueryVisitor.java:178)
	at com.atlassian.jira.jql.query.QueryVisitor.visit(QueryVisitor.java:26)
	at com.atlassian.query.clause.WasClauseImpl.accept(WasClauseImpl.java:48)
	at com.atlassian.jira.jql.query.QueryVisitor.createQuery(QueryVisitor.java:67)
	at com.atlassian.jira.jql.query.DefaultLuceneQueryBuilder.createLuceneQuery(DefaultLuceneQueryBuilder.java:34)
	at com.atlassian.jira.issue.search.providers.LuceneSearchProvider.getHits(LuceneSearchProvider.java:218)
	at com.atlassian.jira.issue.search.providers.LuceneSearchProvider.search(LuceneSearchProvider.java:316)
	at com.atlassian.jira.issue.search.providers.LuceneSearchProvider.search(LuceneSearchProvider.java:87)
	at com.atlassian.jira.issue.search.providers.LuceneSearchProvider.search(LuceneSearchProvider.java:76)
	at com.atlassian.jira.issue.search.providers.LuceneSearchProvider.search(LuceneSearchProvider.java:82)
	at com.atlassian.jira.web.action.issue.IssueNavigator.getSearchResults(IssueNavigator.java:1122)
	at com.atlassian.jira.web.action.issue.IssueNavigator.executeSearch(IssueNavigator.java:924)
	at com.atlassian.jira.web.action.issue.IssueNavigator._doExecuteAdvanced(IssueNavigator.java:604)
	at com.atlassian.jira.web.action.issue.IssueNavigator.doExecuteAdvanced(IssueNavigator.java:538)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)