src/share/classes/java/util/concurrent/CopyOnWriteArrayList.java

@@ -1398,11 +1398,11 @@
         public List<E> subList(int fromIndex, int toIndex) {
             final ReentrantLock lock = l.lock;
             lock.lock();
             try {
                 checkForComodification();
-                if (fromIndex < 0 || toIndex > size)
+                if (fromIndex < 0 || toIndex > size || fromIndex > toIndex)
                     throw new IndexOutOfBoundsException();
                 return new COWSubList<E>(l, fromIndex + offset,
                                          toIndex + offset);
             } finally {
                 lock.unlock();