Index: src/btree.c
==================================================================
--- src/btree.c
+++ src/btree.c
@@ -7,11 +7,11 @@
 **    May you do good and not evil.
 **    May you find forgiveness for yourself and forgive others.
 **    May you share freely, never taking more than you give.
 **
 *************************************************************************
-** $Id: btree.c,v 1.493 2008/08/01 20:10:08 drh Exp $
+** $Id: btree.c,v 1.494 2008/08/02 17:03:32 danielk1977 Exp $
 **
 ** This file implements a external (disk-based) database using BTrees.
 ** See the header comment on "btreeInt.h" for additional information.
 ** Including a description of file format and an overview of operation.
 */
@@ -4521,10 +4521,11 @@
     }
   }
   releasePage(pToRelease);
   return SQLITE_OK;
 }
+
 
 /*
 ** Change the MemPage.pParent pointer on the page whose number is
 ** given in the second argument so that MemPage.pParent holds the
 ** pointer in the third argument.
@@ -4568,15 +4569,16 @@
 
 #ifndef NDEBUG
   /* If the updatePtrmap flag was clear, assert that the entry in the
   ** pointer-map is already correct.
   */
-  if( ISAUTOVACUUM ){
+  if( ISAUTOVACUUM && sqlite3PagerLookup(pBt->pPager,PTRMAP_PAGENO(pBt,pgno)) ){
     u8 eType;
     Pgno ii;
-    ptrmapGet(pBt, pgno, &eType, &ii);
-    assert( ii==pNewParent->pgno && eType==PTRMAP_BTREE );
+    int rc;
+    rc = ptrmapGet(pBt, pgno, &eType, &ii);
+    assert( rc==SQLITE_OK && ii==pNewParent->pgno && eType==PTRMAP_BTREE );
   }
 #endif
 
   return SQLITE_OK;
 }