[news.eclipse.tools.jdt] NullPointerException in search

[chris.senior@xxxxxxxxxxxx (Chris Senior)]

I am running a search in a workspace containing 1 java project. And I get 
the an NPE (see trace at foot of post) when I run the following search for 
all classes declared in a project:

SearchPattern pattern = SearchPattern.createPattern(
               "*", IJavaSearchConstants.CLASS,
               IJavaSearchConstants.DECLARATIONS,
               SearchPattern.R_PATTERN_MATCH | 
SearchPattern.R_CASE_SENSITIVE | SearchPattern.R_ERASURE_MATCH);
SearchParticipant[] participants = new SearchParticipant[] { SearchEngine
                   .getDefaultSearchParticipant() };
IJavaSearchScope scope = SearchEngine
       .createJavaSearchScope(new IJavaElement[] { selectedProject });
searchEngine.search(pattern, participants,
                   scope, requestor, monitor);

Any ideas what is wrong? Interestingly, I can get jdt.ui Java search page 
to do the same search with no problems and I can't work out what it does 
differently?

- Chris

---------- STACK TRACE ----------

java.lang.NullPointerException
	at 
org.eclipse.jdt.internal.core.util.Util.indexOfJavaLikeExtension(Util.java:1166)
	at 
org.eclipse.jdt.internal.core.search.matching.PossibleMatch.getQualifiedName(PossibleMatch.java:110)
	at 
org.eclipse.jdt.internal.core.search.matching.PossibleMatch.<init>(PossibleMatch.java:41)
	at 
org.eclipse.jdt.internal.core.search.matching.MatchLocator.locateMatches(MatchLocator.java:1176)
	at 
org.eclipse.jdt.internal.core.search.JavaSearchParticipant.locateMatches(JavaSearchParticipant.java:94)
	at 
org.eclipse.jdt.internal.core.search.BasicSearchEngine.findMatches(BasicSearchEngine.java:212)
	at 
org.eclipse.jdt.internal.core.search.BasicSearchEngine.search(BasicSearchEngine.java:498)
	at org.eclipse.jdt.core.search.SearchEngine.search(SearchEngine.java:538)