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Ticket Hash: af4556bb5c285c0800b837ab60802c707ec635c1
Title: Segfault while trying to prepare a malformed window-function query
Status: Fixed Type: Code_Defect
Severity: Important Priority: Low
Subsystem: Unknown Resolution: Fixed
Last Modified: 2020-04-03 13:19:17
Version Found In: 3.31.1
User Comments:
drh added on 2020-04-03 11:45:52:

Henry Liu of Shenzhen Ankki Technologies Co.Ltd. sends in the following SQL snippet that causes a segfault while preparing.

<blockquuote>

CREATE TABLE a(b, c);
SELECT c FROM a GROUP BY c
    HAVING(SELECT(sum(b) OVER(ORDER BY b),
                  sum(b) OVER(PARTITION BY min(DISTINCT c), c ORDER BY b)));

This query has caused problems ever since support for window functions was added on 2018-06-30 (version 3.25.0). The problem expressed as an assertion fault up until check-in [712e47714863a8ed] (2019-08-10) at which point it began to segfault.