JDK-8004727 added a new method to Attribute.Visitor and it looks like this test was missed. Here's a sample failure.

/Users/aurora/sandbox/testbase/test/tools/pack200/pack200-verifier/src/xmlkit/ClassReader.java:851: error: AttributeVisitor is not abstract and does not override abstract method visitMethodParameters(MethodParameters_attribute,Element) in Visitor
class AttributeVisitor implements Attribute.Visitor<Element, Element> {
^
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
1 error
java.lang.RuntimeException: compilation failed
at Utils.compiler(Utils.java:306)
at Utils.init(Utils.java:106)
at Utils.doCompareBitWise(Utils.java:144)
at AttributeTests.test6746111(AttributeTests.java:61)
at AttributeTests.main(AttributeTests.java:39)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:477)
at com.sun.javatest.regtest.MainAction$SameVMRunnable.run(MainAction.java:706)
at java.lang.Thread.run(Thread.java:722)