diff -r 5aa85bc92303 -r bbf287c5cd92 jdk/src/share/classes/java/util/stream/SpinedBuffer.java
--- a/jdk/src/share/classes/java/util/stream/SpinedBuffer.java	Thu Aug 01 16:53:40 2013 +0100
+++ b/jdk/src/share/classes/java/util/stream/SpinedBuffer.java	Thu Aug 01 15:28:57 2013 +0100
@@ -28,6 +28,7 @@
 import java.util.Arrays;
 import java.util.Iterator;
 import java.util.List;
+import java.util.Objects;
 import java.util.PrimitiveIterator;
 import java.util.Spliterator;
 import java.util.Spliterators;
@@ -317,6 +318,8 @@
 
             @Override
             public boolean tryAdvance(Consumer<? super E> consumer) {
+                Objects.requireNonNull(consumer);
+
                 if (splSpineIndex < lastSpineIndex
                     || (splSpineIndex == lastSpineIndex && splElementIndex < lastSpineElementFence)) {
                     consumer.accept(splChunk[splElementIndex++]);
@@ -334,6 +337,8 @@
 
             @Override
             public void forEachRemaining(Consumer<? super E> consumer) {
+                Objects.requireNonNull(consumer);
+
                 if (splSpineIndex < lastSpineIndex
                     || (splSpineIndex == lastSpineIndex && splElementIndex < lastSpineElementFence)) {
                     int i = splElementIndex;
@@ -634,6 +639,8 @@
 
             @Override
             public boolean tryAdvance(T_CONS consumer) {
+                Objects.requireNonNull(consumer);
+
                 if (splSpineIndex < lastSpineIndex
                     || (splSpineIndex == lastSpineIndex && splElementIndex < lastSpineElementFence)) {
                     arrayForOne(splChunk, splElementIndex++, consumer);
@@ -651,6 +658,8 @@
 
             @Override
             public void forEachRemaining(T_CONS consumer) {
+                Objects.requireNonNull(consumer);
+
                 if (splSpineIndex < lastSpineIndex
                     || (splSpineIndex == lastSpineIndex && splElementIndex < lastSpineElementFence)) {
                     int i = splElementIndex;