1 files changed, 1 insertions, 0 deletions
diff --git a/src/resolve.c b/src/resolve.c
index 68a1d94a2..81f3d9947 100644
--- a/src/resolve.c
+++ b/src/resolve.c
@@ -1889,6 +1889,7 @@ static int resolveSelectStep(Walker *pWalker, Select *p){
     if( pOuterNC ) pOuterNC->nNestedSelect++;
     for(i=0; i<p->pSrc->nSrc; i++){
       SrcItem *pItem = &p->pSrc->a[i];
+      assert( pItem->zName!=0 || pItem->pSelect!=0 );
       if( pItem->pSelect && (pItem->pSelect->selFlags & SF_Resolved)==0 ){
         int nRef = pOuterNC ? pOuterNC->nRef : 0;
         const char *zSavedContext = pParse->zAuthContext;