src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/Context.java

@@ -58,10 +58,11 @@
 import java.security.ProtectionDomain;
 import java.util.Collection;
 import java.util.HashMap;
 import java.util.LinkedHashMap;
 import java.util.Map;
+import java.util.Objects;
 import java.util.concurrent.atomic.AtomicLong;
 import java.util.concurrent.atomic.AtomicReference;
 import java.util.function.Consumer;
 import java.util.function.Supplier;
 import java.util.logging.Level;

@@ -902,11 +903,11 @@
      * @param sm current security manager instance
      * @param fullName fully qualified package name
      * @throw SecurityException if not accessible
      */
     private static void checkPackageAccess(final SecurityManager sm, final String fullName) {
-        sm.getClass(); // null check
+        Objects.requireNonNull(sm);
         final int index = fullName.lastIndexOf('.');
         if (index != -1) {
             final String pkgName = fullName.substring(0, index);
             AccessController.doPrivileged(new PrivilegedAction<Void>() {
                 @Override