From: Mattias Jonsson
Date: April 11 2011 4:16pm
Subject: bzr commit into mysql-5.1 branch (mattias.jonsson:3654)
List-Archive: http://lists.mysql.com/commits/135217
Message-Id: <201104111617.p3BGH52O026030@acsmt356.oracle.com>
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#At file:///C:/ade/mysql-bzr/topush-5.1/ based on revid:sven.sandberg@stripped

 3654 Mattias Jonsson	2011-04-11 [merge]
      merge

    modified:
      sql/ha_partition.cc
=== modified file 'sql/ha_partition.cc'
--- a/sql/ha_partition.cc	2011-01-24 12:41:44 +0000
+++ b/sql/ha_partition.cc	2011-04-11 16:09:23 +0000
@@ -4317,7 +4317,8 @@ int ha_partition::index_read_idx_map(uch
           break;
       }
     }
-    m_last_part= part;
+    if (part <= m_part_spec.end_part)
+      m_last_part= part;
   }
   else
   {
@@ -6237,7 +6238,14 @@ void ha_partition::print_error(int error
   {
     /* In case m_file has not been initialized, like in bug#42438 */
     if (m_file)
+    {
+      if (m_last_part >= m_tot_parts)
+      {
+        DBUG_ASSERT(0);
+        m_last_part= 0;
+      }
       m_file[m_last_part]->print_error(error, errflag);
+    }
     else
       handler::print_error(error, errflag);
   }

No bundle (reason: revision is a merge (you can force generation of a bundle with env var BZR_FORCE_BUNDLE=1)).