*** old/src/java.base/share/classes/java/lang/invoke/MethodHandle.java	Tue Oct 14 22:50:05 2014
--- new/src/java.base/share/classes/java/lang/invoke/MethodHandle.java	Tue Oct 14 22:50:05 2014

*** 1436,1449 ****
--- 1436,1448 ----
       * Use with discretion.
       */
      /*non-public*/
      void updateForm(LambdaForm newForm) {
          if (form == newForm)  return;
          assert(this instanceof DirectMethodHandle && this.internalMemberName().isStatic());
          // ISSUE: Should we have a memory fence here?
+         newForm.prepare();  // as in MethodHandle.<init>
          UNSAFE.putObject(this, FORM_OFFSET, newForm);
          this.form.prepare();  // as in MethodHandle.<init>
+         UNSAFE.fullFence();
      }
  
      private static final long FORM_OFFSET;
      static {
          try {