--- a/src/hotspot/share/classfile/classFileParser.cpp	Fri Aug 03 14:14:59 2018 +0100
+++ b/src/hotspot/share/classfile/classFileParser.cpp	Fri Aug 03 09:42:57 2018 -0700
@@ -3572,6 +3572,9 @@
                          "Nest-host class_info_index %u has bad constant type in class file %s",
                          class_info_index, CHECK);
           _nest_host = class_info_index;
+        } else {
+          // Unknown attribute
+          cfs->skip_u1(attribute_length, CHECK);
         }
       } else {
         // Unknown attribute