## 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
ATTACH DATABASE ':memory:' AS aux40;
BEGIN IMMEDIATE;
CREATE TABLE T (
  a TEXT,
  b TEXT,
  c REAL
);
INSERT INTO T VALUES ('a','b',quote(date(if(1, NULL, 12.5)))), ('a','c',-1.0), ('b','d',0.0);
SELECT
COALESCE(a,'e') AS d,
COALESCE(b,'f') AS e,
SUM(c) AS f
FROM T
GROUP BY a,b;
CREATE  INDEX IF NOT EXISTS idx_T_6101 ON T(a COLLATE NOCASE) WHERE a IS NOT NULL;
END TRANSACTION;
INSERT OR FAIL INTO T VALUES (NULL, NULL, 'x');
WITH cte AS (SELECT * FROM T) SELECT * FROM cte JOIN T ON cte.b = T.b;
DETACH DATABASE aux40;
DELETE FROM T WHERE 1 RETURNING *;
VACUUM;
```

## Actual output

```sql
||x
```

## Expectation

```sql

```

## Flag

```

```

