Index: src/btree.c
==================================================================
--- src/btree.c
+++ src/btree.c
@@ -938,11 +938,12 @@
   assert( pPage->leaf==0 || pPage->leaf==1 );
   n = pPage->childPtrSize;
   assert( n==4-4*pPage->leaf );
   if( pPage->intKey ){
     if( pPage->hasData ){
-      n += getVarint32(&pCell[n], nPayload);
+      assert( n==0 );
+      n = getVarint32(pCell, nPayload);
     }else{
       nPayload = 0;
     }
     n += getVarint(&pCell[n], (u64*)&pInfo->nKey);
     pInfo->nData = nPayload;