--- old/langtools/make/tools/crules/MutableFieldsAnalyzer.java	2016-08-08 16:37:05.000000000 -0700
+++ new/langtools/make/tools/crules/MutableFieldsAnalyzer.java	2016-08-08 16:37:04.000000000 -0700
@@ -107,6 +107,8 @@
                 "layerClass", "bootMethod", "defineModulesWithOneLoaderMethod", "configurationMethod");
         ignoreFields("com.sun.tools.javac.util.JDK9Wrappers$ServiceLoaderHelper",
                 "loadMethod");
+        ignoreFields("com.sun.tools.javac.util.JDK9Wrappers$VMHelper",
+                "vmClass", "getRuntimeArgumentsMethod");
         ignoreFields("com.sun.tools.javac.util.ModuleHelper",
                 "addExportsMethod", "getUnnamedModuleMethod", "getModuleMethod");
     }