Ensure that variables are not used in the WINDOW clause of a query inside

of a trigger.  dbsqlfuzz d9cf66100064952b66951845dfab41de1c124611

FossilOrigin-Name: 1a341378ab24a5091e6cf03b9e957d11b2bfe5c711835e8c583785f8fa0125d3

src/attach.c

@@ -514,6 +514,7 @@ void sqlite3FixInit(
   pFix->w.xSelectCallback2 = 0;
   pFix->w.walkerDepth = 0;
   pFix->w.eCode = 0;
+  pFix->w.bWalkWinDefn = 1;
   pFix->w.u.pFix = pFix;
 }
 

src/sqliteInt.h

@@ -3833,6 +3833,7 @@ struct Walker {
   void (*xSelectCallback2)(Walker*,Select*);/* Second callback for SELECTs */
   int walkerDepth;                          /* Number of subqueries */
   u16 eCode;                                /* A small processing code */
+  unsigned bWalkWinDefn : 1;                /* True to walk pWinDefn */
   union {                                   /* Extra data for callback */
     NameContext *pNC;                         /* Naming context */
     int n;                                    /* A counter */

src/walker.c

@@ -130,10 +130,12 @@ int sqlite3WalkSelectExpr(Walker *pWalker, Select *p){
   if( sqlite3WalkExpr(pWalker, p->pHaving) ) return WRC_Abort;
   if( sqlite3WalkExprList(pWalker, p->pOrderBy) ) return WRC_Abort;
   if( sqlite3WalkExpr(pWalker, p->pLimit) ) return WRC_Abort;
-#if !defined(SQLITE_OMIT_WINDOWFUNC) && !defined(SQLITE_OMIT_ALTERTABLE)
-  {
-    Parse *pParse = pWalker->pParse;
-    if( pParse && IN_RENAME_OBJECT ){
+#if !defined(SQLITE_OMIT_WINDOWFUNC)
+  if( p->pWinDefn ){
+    Parse *pParse;
+    if( pWalker->bWalkWinDefn
+     || ((pParse = pWalker->pParse)!=0 && IN_RENAME_OBJECT)
+    ){
       /* The following may return WRC_Abort if there are unresolvable
       ** symbols (e.g. a table that does not exist) in a window definition. */
       int rc = walkWindowList(pWalker, p->pWinDefn, 0);