## Summary
<!--Explain briefly what goes wrong and explain why you believe this is a bug and not the intended behavior of SQLite (if it is not a crash).-->**No review yet**

## Minimized query

```sql
CREATE TABLE t1(a INTEGER PRIMARY KEY, b INT, c VARCHAR(1000));
CREATE INDEX t1b ON t1(b);
INSERT INTO t1(a,b,c) values(1,2,'count.test cases for NOT INDEXED');
ANALYZE;
UPDATE sqlite_stat1 SET stat='1000000 10' WHERE NOT NOT (idx='t1b') ;
ANALYZE sqlite_master;
SELECT count(1) FROM t1;
CREATE TABLE t7(a INT,b TEXT,c BLOB,d REAL);
CREATE TABLE t8(a INT,b TEXT,c BLOB,d REAL);
CREATE INDEX t8a ON t8(a);

SELECT * FROM t7 NATURAL JOIN t7;
SELECT STRING_AGG(d, '|') FROM t8;
```

## Actual output

```sql
1
```

## Expectation

```sql

```

## Flag

```

```