BUG: Lucene.Net.Codecs.Lucene42.Lucene42DocValuesProducer::LoadNumeri…

…c(): Throw AssertionError rather than InvalidOperationException (see #446).

src/Lucene.Net/Codecs/Lucene42/Lucene42DocValuesProducer.cs

@@ -288,7 +288,7 @@ private NumericDocValues LoadNumeric(FieldInfo field)
                     return new NumericDocValuesAnonymousClass3(min, mult, quotientReader);
 
                 default:
-                    throw new InvalidOperationException();
+                    throw AssertionError.Create();
             }
         }