Index: src/wal.c
==================================================================
--- src/wal.c
+++ src/wal.c
@@ -1907,12 +1907,11 @@
   /* EVIDENCE-OF: R-62920-47450 The busy-handler callback is never invoked
   ** in the SQLITE_CHECKPOINT_PASSIVE mode. */
   assert( eMode!=SQLITE_CHECKPOINT_PASSIVE || xBusy==0 );
 
   rc = walCheckpointStart(pWal, zBuf, nBuf, xBusy, pBusyArg, sync_flags, &sC);
-  if( sC.pIter==0 ) goto walcheckpoint_out;
-  assert( rc==SQLITE_OK );
+  if( sC.pIter==0 || rc!=SQLITE_OK ) goto walcheckpoint_out;
 
   /* Step the checkpoint object until it reports something other than 
   ** SQLITE_OK.  */
   while( SQLITE_OK==(rc = walCheckpointStep(&sC)) );
   rc = walCheckpointFinalize(&sC);