--- old/src/java.base/share/classes/java/lang/reflect/Constructor.java	2018-03-06 15:23:27.000000000 -0800
+++ new/src/java.base/share/classes/java/lang/reflect/Constructor.java	2018-03-06 15:23:26.000000000 -0800
@@ -181,6 +181,12 @@
     @CallerSensitive
     public void setAccessible(boolean flag) {
         AccessibleObject.checkPermission();
+
+        if (clazz.isValue()) {
+            throw new InaccessibleObjectException(
+                "Unable to make a value class constructor \"" + this + "\" accessible");
+        }
+
         if (flag) {
             checkCanSetAccessible(Reflection.getCallerClass());
         }
@@ -474,6 +480,11 @@
         throws InstantiationException, IllegalAccessException,
                IllegalArgumentException, InvocationTargetException
     {
+        if (clazz.isValue()) {
+            throw new IllegalAccessException(
+                "cannot create new instance of value class " + clazz.getName());
+        }
+
         if (!override) {
             Class<?> caller = Reflection.getCallerClass();
             checkAccess(caller, clazz, clazz, modifiers);