Do not use indexed expressions to replace the expression being indexed on a

RIGHT JOIN as that leads to problems, as shown by
dbsqlfuzz a644e70d7683a7ca59c71861a153c1dccf8850b9.

FossilOrigin-Name: f113eebdbe68246fd38d640b0cdf0fd73ab5d2abad9226274dfa2e41fe286bf0

src/sqliteInt.h

@@ -2795,6 +2795,9 @@ struct AggInfo {
   } *aFunc;
   int nFunc;              /* Number of entries in aFunc[] */
   u32 selId;              /* Select to which this AggInfo belongs */
+#ifdef SQLITE_DEBUG
+  Select *pSelect;        /* SELECT statement that this AggInfo supports */
+#endif
 };
 
 /*