throw new DataflowAnalysisException("Repository lookup failure: " + e.toString(), e);
throw new MissingClassException(e);
	protected Type mergeReferenceTypes(ReferenceType aRef, ReferenceType bRef) throws DataflowAnalysisException {		// Two concrete object types.		// According to the JVM spec, 2nd edition, 4.9.2,		// the result of merging types is the "first common superclass".		// Interfaces are NOT considered!		// This will use the Repository to look up classes.		try {			// Special case: ExceptionObjectTypes.			// We want to preserve the ExceptionSets associated,			// in order to track the exact set of exceptions			if (isObjectType(aRef.getType()) && isObjectType(bRef.getType()) &&			        (aRef.getType() == T_EXCEPTION || bRef.getType() == T_EXCEPTION)) {				ExceptionSet union = exceptionSetFactory.createExceptionSet();				updateExceptionSet(union, (ObjectType) aRef);				updateExceptionSet(union, (ObjectType) bRef);				return ExceptionObjectType.fromExceptionSet(union);			}			return aRef.getFirstCommonSuperclass(bRef);		} catch (ClassNotFoundException e) {			lookupFailureCallback.reportMissingClass(e);			throw new DataflowAnalysisException("Repository lookup failure: " + e.toString(), e);		}	}