--- a/langtools/make/tools/crules/MutableFieldsAnalyzer.java	Wed Aug 10 13:52:02 2016 -0700
+++ b/langtools/make/tools/crules/MutableFieldsAnalyzer.java	Wed Aug 10 15:47:46 2016 -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");
     }