--- old/src/jdk.jlink/share/classes/jdk/tools/jmod/JmodTask.java	2016-12-21 17:34:54.000000000 +0530
+++ new/src/jdk.jlink/share/classes/jdk/tools/jmod/JmodTask.java	2016-12-21 17:34:53.000000000 +0530
@@ -74,6 +74,7 @@
 import java.util.Optional;
 import java.util.ResourceBundle;
 import java.util.Set;
+import java.util.TreeSet;
 import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.function.Predicate;
@@ -497,6 +498,7 @@
 
                 // Add (or replace) the Packages attribute
                 if (packages != null) {
+                    validatePackages(descriptor, packages);
                     extender.packages(packages);
                 }
 
@@ -530,6 +532,24 @@
             }
         }
 
+        private void validatePackages(ModuleDescriptor descriptor, Set<String> packages) {
+            Set<String> nonExistPackages = new TreeSet<>();
+            descriptor.exports().stream()
+                .map(Exports::source)
+                .filter(pn -> !packages.contains(pn))
+                .forEach(nonExistPackages::add);
+
+            descriptor.opens().stream()
+                .map(Opens::source)
+                .filter(pn -> !packages.contains(pn))
+                .forEach(nonExistPackages::add);
+
+            if (!nonExistPackages.isEmpty()) {
+                throw new CommandException("err.missing.export.or.open.packages",
+                    descriptor.name(), nonExistPackages);
+            }
+        }
+
         /*
          * Hasher resolves a module graph using the --hash-modules PATTERN
          * as the roots.