Re: BUG #14897: Segfault on statitics SQL request

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Dmitry Dolgov <9erthalion6(at)gmail(dot)com>
Cc: Vincent Lachenal <vincent(dot)lachenal(at)gmail(dot)com>, PostgreSQL mailing lists <pgsql-bugs(at)postgresql(dot)org>
Subject: Re: BUG #14897: Segfault on statitics SQL request
Date: 2017-11-10 23:06:55
Message-ID: 17617.1510355215@sss.pgh.pa.us
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Dmitry Dolgov <9erthalion6(at)gmail(dot)com> writes:
> Looks like I can reproduce something close to this issue on my Gentoo
> installation using the provided dataset, but it looks quite weird for me:

Interesting. I wonder whether __int128 has an alignment requirement that
is more than MAXALIGN. Intel chips generally don't enforce alignment
requirements, but maybe there's an exception here?

My Fedora box thinks __alignof__(__int128) is 16, which is suspicious,
but it's not crashing.

regards, tom lane

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