(issue is reproducible with JDK8b87)

Consider the following code sample:

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Spliterator;

public class SplittingLinkedList {

    public static void main(String[] args) {

        final Spliterator spliterator = new ArrayList<>(Arrays.asList(1, 2, 3, 4, 5)).spliterator();
        System.out.println("initial spliterator size = " + spliterator.estimateSize());
        final Spliterator nextSpliterator = spliterator.trySplit();
        System.out.println("next splitertor size = " + nextSpliterator.estimateSize());
        System.out.println("initial spliterator size = " + spliterator.estimateSize());

    }
}

From the output it could be seen that the first attempt to split consumes all the initial spliterator:


initial spliterator size = 5
next splitertor size = 5
initial spliterator size = 0


This behavior contradicts the spec for Spliterator.trySplit():
http://download.java.net/jdk8/docs/api/java/util/Spliterator.html#trySplit()

"... the value reported for estimateSize() before splitting, if not already zero or Long.MAX_VALUE, must, after splitting, be greater than estimateSize() for this and the returned Spliterator ... "

Either the specification or behavior of the implementation should be corrected.

The following JCK (not yet integrated) tests fail due to this issue:

api/java_util/concurrent/ArrayBlockingQueue/SpliteratorGeneral.html#SpliteratorGeneral[estimateSize_decreasingWithTrySplitCalls] 
api/java_util/LinkedHashSet/SpliteratorGeneral.html#SpliteratorGeneral[estimateSize_decreasingWithTrySplitCalls]                 
api/java_util/LinkedList/SpliteratorGeneral.html#SpliteratorGeneral[estimateSize_decreasingWithTrySplitCalls]                    
api/java_util/Spliterators/SpliteratorFromCollection.html#SpliteratorFromCollection[estimateSize_decreasingWithTrySplitCalls]