1 files changed, 1 insertions, 0 deletions
diff --git a/src/select.c b/src/select.c
index 397037b17..6e0eeb2f4 100644
--- a/src/select.c
+++ b/src/select.c
@@ -102,6 +102,7 @@ static void clearSelect(sqlite3 *db, Select *p, int bFree){
     }
 #endif
     if( OK_IF_ALWAYS_TRUE(p->pWith) ) sqlite3WithDelete(db, p->pWith);
+    assert( p->pWin==0 );
     if( bFree ) sqlite3DbFreeNN(db, p);
     p = pPrior;
     bFree = 1;