From: | Heikki Linnakangas <hlinnaka(at)iki(dot)fi> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Artem Ignatyev <cryo28(at)gmail(dot)com> |
Cc: | pgsql-bugs(at)postgresql(dot)org |
Subject: | Re: 9.4.1 segfault while creating hash index on temporary table |
Date: | 2015-05-13 07:18:01 |
Message-ID: | 5552FAA9.3050303@iki.fi |
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Lists: | pgsql-bugs |
On 05/13/2015 08:09 AM, Tom Lane wrote:
> Artem Ignatyev <cryo28(at)gmail(dot)com> writes:
>> I am seeing this bug on my CentOS 6.6 PostgreSQL 9.4.1 db server
>> (installed from rpms of yum.postgresql.org) as well as on postgresql
>> 9.4.1 from Ubuntu 15.04 repository on my personal laptop.
>
> It's crashing because it's trying to acquire the content_lock on a
> local buffer, which of course doesn't have one. This appears to have
> been broken in 8fc23a9e. Oddly, HEAD does not have the problem because
> it looks like
>
> if ((mode == RBM_ZERO_AND_LOCK || mode == RBM_ZERO_AND_CLEANUP_LOCK) &&
> !isLocalBuf)
> {
> LWLockAcquire(bufHdr->content_lock, LW_EXCLUSIVE);
> }
>
> but the back branches are missing the isLocalBuf bit.
Odd indeed. I must've added that at the last minute to the
master-version, but forgot the other branches.
Fixed now, thanks for the report and analysis.
- Heikki
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