additional diagnostic info

org.aspectj.matcher/src/org/aspectj/weaver/AbstractReferenceTypeDelegate.java

@@ -112,7 +112,7 @@ public abstract class AbstractReferenceTypeDelegate implements ReferenceTypeDele
 			} else {
 				throw new BCException("Whilst processing type '" + this.resolvedTypeX.getSignature()
 						+ "' - cannot cast the outer type to a reference type.  Signature=" + outerClassType.getSignature()
-						+ " toString()=" + outerClassType.toString());
+						+ " toString()=" + outerClassType.toString()+" class=" + outerClassType.getClassName());
 			}
 		}
 		ReferenceType outer = (ReferenceType) outerClassType;