Index: lucene/src/test/org/apache/lucene/index/TestIndexWriter.java
===================================================================
--- lucene/src/test/org/apache/lucene/index/TestIndexWriter.java	(revision 1174709)
+++ lucene/src/test/org/apache/lucene/index/TestIndexWriter.java	(working copy)
@@ -38,6 +38,7 @@
 import org.apache.lucene.document.Document;
 import org.apache.lucene.document.Field;
 import org.apache.lucene.document.FieldType;
+import org.apache.lucene.document.IndexDocValuesField;
 import org.apache.lucene.document.TextField;
 import org.apache.lucene.index.IndexWriterConfig.OpenMode;
 import org.apache.lucene.search.DocIdSetIterator;
@@ -1870,4 +1871,19 @@
     w.close();
     d.close();
   }
+
+  public void testMultiValuedIndexDocValuesField() throws Exception {
+    Directory d = newDirectory();
+    RandomIndexWriter w = new RandomIndexWriter(random, d);
+    Document doc = new Document();
+    IndexDocValuesField f = new IndexDocValuesField("field");
+    f.setInt(17);
+    // Index doc values are single-valued so we should not
+    // be able to add same field more than once:
+    doc.add(f);
+    doc.add(f);
+    w.addDocument(doc);
+    w.close();
+    d.close();
+  }
 }