Merge changes I627681be,I334034a2

* changes:
  TreeWalk: Do not close reader passed explicitly to constructor
  TreeWalk: Stop using deprecated ObjectReader#release()

org.eclipse.jgit/src/org/eclipse/jgit/treewalk/TreeWalk.java

@@ -157,11 +157,8 @@ public class TreeWalk implements AutoCloseable {
 	public static TreeWalk forPath(final Repository db, final String path,
 			final AnyObjectId... trees) throws MissingObjectException,
 			IncorrectObjectTypeException, CorruptObjectException, IOException {
-		ObjectReader reader = db.newObjectReader();
-		try {
+		try (ObjectReader reader = db.newObjectReader()) {
 			return forPath(reader, path, trees);
-		} finally {
-			reader.release();
 		}
 	}
 
@@ -198,6 +195,8 @@ public class TreeWalk implements AutoCloseable {
 
 	private final ObjectReader reader;
 
+	private final boolean closeReader;
+
 	private final MutableObjectId idBuffer = new MutableObjectId();
 
 	private TreeFilter filter;
@@ -220,22 +219,30 @@ public class TreeWalk implements AutoCloseable {
 	 * Create a new tree walker for a given repository.
 	 *
 	 * @param repo
-	 *            the repository the walker will obtain data from.
+	 *            the repository the walker will obtain data from. An
+	 *            ObjectReader will be created by the walker, and will be closed
+	 *            when the walker is closed.
 	 */
 	public TreeWalk(final Repository repo) {
-		this(repo.newObjectReader());
+		this(repo.newObjectReader(), true);
 	}
 
 	/**
 	 * Create a new tree walker for a given repository.
 	 *
 	 * @param or
-	 *            the reader the walker will obtain tree data from.
+	 *            the reader the walker will obtain tree data from. The reader
+	 *            is not closed when the walker is closed.
 	 */
 	public TreeWalk(final ObjectReader or) {
+		this(or, false);
+	}
+
+	private TreeWalk(final ObjectReader or, final boolean closeReader) {
 		reader = or;
 		filter = TreeFilter.ALL;
 		trees = NO_TREES;
+		this.closeReader = closeReader;
 	}
 
 	/** @return the reader this walker is using to load objects. */
@@ -264,7 +271,9 @@ public class TreeWalk implements AutoCloseable {
 	 */
 	@Override
 	public void close() {
-		reader.close();
+		if (closeReader) {
+			reader.close();
+		}
 	}
 
 	/**