| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Artem Ignatyev <cryo28(at)gmail(dot)com> |
| Cc: | pgsql-bugs(at)postgresql(dot)org, Heikki Linnakangas <hlinnaka(at)iki(dot)fi> |
| Subject: | Re: 9.4.1 segfault while creating hash index on temporary table |
| Date: | 2015-05-13 05:09:02 |
| Message-ID: | 9927.1431493742@sss.pgh.pa.us |
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| Lists: | pgsql-bugs |
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.
regards, tom lane
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