Index: src/expr.c
==================================================================
--- src/expr.c
+++ src/expr.c
@@ -10,11 +10,11 @@
 **
 *************************************************************************
 ** This file contains routines used for analyzing expressions and
 ** for generating VDBE code that evaluates expressions in SQLite.
 **
-** $Id: expr.c,v 1.100 2003/09/06 22:18:08 drh Exp $
+** $Id: expr.c,v 1.101 2003/09/23 10:25:33 drh Exp $
 */
 #include "sqliteInt.h"
 #include <ctype.h>
 
 /*
@@ -263,11 +263,11 @@
       sqliteExprDelete(pExpr);
       return pList;
     }
     pList->a = a;
   }
-  if( pExpr || pName ){
+  if( pList->a && (pExpr || pName) ){
     i = pList->nExpr++;
     pList->a[i].pExpr = pExpr;
     pList->a[i].zName = 0;
     if( pName ){
       sqliteSetNString(&pList->a[i].zName, pName->z, pName->n, 0);