From 0565536b7f606762f92fc113389e49e45de14d6f Mon Sep 17 00:00:00 2001
From: Robert Muir <rmuir@apache.org>
Date: Tue, 31 Mar 2015 21:15:27 +0000
Subject: [PATCH] LUCENE-6271: fix bug in SortingDocsEnum

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene6271@1670483 13f79535-47bb-0310-9956-ffa450edef68
---
 .../lucene/index/SortingLeafReader.java       | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/lucene/misc/src/java/org/apache/lucene/index/SortingLeafReader.java b/lucene/misc/src/java/org/apache/lucene/index/SortingLeafReader.java
index a87dea6955a..99b3d79ed58 100644
--- a/lucene/misc/src/java/org/apache/lucene/index/SortingLeafReader.java
+++ b/lucene/misc/src/java/org/apache/lucene/index/SortingLeafReader.java
@@ -487,6 +487,28 @@ public class SortingLeafReader extends FilterLeafReader {
     PostingsEnum getWrapped() {
       return in;
     }
+    
+    // we buffer up docs/freqs only, don't forward any positions requests to underlying enum
+
+    @Override
+    public int nextPosition() throws IOException {
+      return -1;
+    }
+
+    @Override
+    public int startOffset() throws IOException {
+      return -1;
+    }
+
+    @Override
+    public int endOffset() throws IOException {
+      return -1;
+    }
+
+    @Override
+    public BytesRef getPayload() throws IOException {
+      return null;
+    }
   }
 
   static class SortingPostingsEnum extends FilterPostingsEnum {