--- old/src/java.base/share/classes/java/util/stream/StreamSpliterators.java	2016-02-06 18:57:05.821478700 +0600
+++ new/src/java.base/share/classes/java/util/stream/StreamSpliterators.java	2016-02-06 18:57:05.647456600 +0600
@@ -189,6 +189,8 @@
             if (isParallel && !finished) {
                 init();
 
+                if (buffer != null && buffer.count() > 0) // partial traversal started
+                    return null;
                 Spliterator<P_IN> split = spliterator.trySplit();
                 return (split == null) ? null : wrap(split);
             }