Re: BUG #17152: ERROR: AddressSanitizer: SEGV on iso-8859-1 address

On Wed, Aug 18, 2021 at 02:56:00AM +0000, PG Bug reporting form wrote:
> The following bug has been logged on the website:
> 
> Bug reference:      17152
> Logged by:          Zhiyong Wu
> Email address:      253540651@qq.com
> PostgreSQL version: 14beta2
> Operating system:   Linux version 5.13.0-1-MANJARO (builduser@LEGION)
> Description:        
> 
> PoC:
> CREATE TEMP TABLE v0 ( v2 SMALLINT NOT NULL DEFAULT - - 90 , DATA TEXT , v1
> REAL CONSTRAINT XMLFOREST NULL ) ;
>  INSERT INTO v0 VALUES ( - - - - 0 , - - - - -1 ) , ( - - ( ( ( SELECT (
> SELECT LEAST ( v1 ) x FROM v0 WHERE - - - 43 >= v1 ) FROM v0 AS v2 ( OVERLAY
> , v2 , v1 ) ) ) UNION SELECT - - - 22 ) , - - - - - - 2147483647 ) , ( - - -
> -128 , - - - -2147483648 ) , ( - - - - 36 , - - - - - - - -128 ) , ( - - - -
> 9 , - - - - - -128 ) ON CONFLICT DO NOTHING ;
>  ;
>  SELECT - - 11 + v2 AS x FROM v0 WHERE v2 = ( SELECT LEAST ( ( ( ( SELECT -
> 127 FROM ( SELECT 0 FROM ( VALUES ( - 16 ) , ( -2147483648 ) , ( - - - - -1
> ) ) v2 ( v2 ) GROUP BY ( + - - 72 ) / - - 18 ) AS SMALLINT ) ) UNION SELECT
> MODE ( ) WITHIN GROUP ( ORDER BY v2 DESC ) FILTER ( WHERE MODE ( ) WITHIN
> GROUP ( ORDER BY v1 = CASE WHEN v1 IS NULL THEN v1 ELSE - - 91 END DESC ) )
> NULL ) ) FROM v0 ) ;
>  COMMIT TRANSACTION ;
>  DELETE FROM v0 WHERE v2 = - - - - - - 38 ;
>  ;

I can also confirm this failure on git master.

-- 
  Bruce Momjian  <bruce@momjian.us>        https://momjian.us
  EDB                                      https://enterprisedb.com

  If only the physical world exists, free will is an illusion.