Description Karsten Thoms 2011-06-30 07:14:20 EDT

The set 'uris' in class ResourceLoadingSlotEntry is initialized with emptySet(). The instance bound here is Collections#EmptySet, which is unmodifiable. This leads to an UnsupportedOperationException when calling addUri().

The variable should be initialized with 
  private Set<Pattern> uris = new HashSet<Pattern>();