| From: | Andrew Gierth <andrew(at)tao11(dot)riddles(dot)org(dot)uk> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Kyle Samson <kysamson(at)tripadvisor(dot)com>, "pgsql-hackers\(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>, Matthew Kelly <mkelly(at)tripadvisor(dot)com> |
| Subject: | Re: Consistent segfault in complex query |
| Date: | 2018-09-12 16:43:18 |
| Message-ID: | 87zhwmoehf.fsf@news-spur.riddles.org.uk |
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| Thread: | |
| Lists: | pgsql-hackers |
>>>>> "Andrew" == Andrew Gierth <andrew(at)tao11(dot)riddles(dot)org(dot)uk> writes:
Andrew> Going to see if this can be narrowed down further.
Simpler testcase, removing the CTE, so this is clearly just about
InitPlan:
create table mytable (flag boolean default false, foo integer);
insert into mytable default values;
session B:
begin; update mytable set flag = true;
session A:
update mytable set foo = case when not flag then foo else length((select 'foo')) end;
commit in B and watch A die in:
#1 0x0000000000b001bd in text_length (str=0) at varlena.c:647
--
Andrew (irc:RhodiumToad)
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