--- a/jaxp/src/java.xml/share/classes/com/sun/org/apache/xerces/internal/impl/XMLDocumentFragmentScannerImpl.java	Wed Jul 05 22:07:34 2017 +0200
+++ b/jaxp/src/java.xml/share/classes/com/sun/org/apache/xerces/internal/impl/XMLDocumentFragmentScannerImpl.java	Tue Aug 23 13:33:03 2016 -0700
@@ -511,7 +511,8 @@
                     //fDocumentHandler.endElement(getElementQName(),null);
                     break;
                 default :
-                    throw new InternalError("processing event: " + event);
+                    // Errors should have already been handled by the Scanner
+                    return false;
 
             }
             //System.out.println("here in before calling next");