--- a/jdk/src/share/classes/com/sun/imageio/plugins/jpeg/JFIFMarkerSegment.java	Tue Aug 30 14:41:12 2011 +0100
+++ b/jdk/src/share/classes/com/sun/imageio/plugins/jpeg/JFIFMarkerSegment.java	Tue Aug 30 11:53:11 2011 -0700
@@ -763,7 +763,7 @@
                 }
             } catch (IllegalThumbException e) {
                 // Should never happen
-                throw new InternalError("Illegal thumb in setThumbnail!");
+                throw new InternalError("Illegal thumb in setThumbnail!", e);
             }
         }