Index: lucene/facet/src/java/org/apache/lucene/util/encoding/VInt8IntDecoder.java
===================================================================
--- lucene/facet/src/java/org/apache/lucene/util/encoding/VInt8IntDecoder.java	(revision 1432028)
+++ lucene/facet/src/java/org/apache/lucene/util/encoding/VInt8IntDecoder.java	(working copy)
@@ -29,12 +29,30 @@
 
   @Override
   protected void doDecode(BytesRef buf, IntsRef values, int upto) {
+    int needed = upto - buf.offset;
+    if (values.length < needed) {
+      values.grow(needed);
+    }
+    int value = 0;
+    int offset = buf.offset;
+    while (offset < upto) {
+      byte b = buf.bytes[offset++];
+      if (b >= 0) {
+        values.ints[values.length++] = (value << 7) | b;
+        value = 0;
+      } else {
+        value = (value << 7) | (b & 0x7F);
+      }
+    }
+
+    /*
     while (buf.offset < upto) {
       if (values.length == values.ints.length) {
         values.grow(values.length + 10); // grow by few items, however not too many
       }
       values.ints[values.length++] = VInt8.decode(buf);
     }
+    */
   }
 
   @Override