From: Tom Lane <tgl@sss.pgh.pa.us>
To: pgsql-hackers@lists.postgresql.org
Cc: Andres Freund <andres@anarazel.de>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: Thomas Munro <thomas.munro@gmail.com>
Subject: Re: Pointer subtraction with a null pointer
Date: Sat, 26 Mar 2022 12:13:12 -0400
Message-ID: <49360.1648311192@sss.pgh.pa.us> (raw)
In-Reply-To: <48826.1648310694@sss.pgh.pa.us>
References: <48826.1648310694@sss.pgh.pa.us>
I wrote:
> Several of Andres' buildfarm animals have recently started to whine
> that "performing pointer subtraction with a null pointer has undefined
> behavior" for assorted places in freepage.c.
Ah, sorry, I meant to include a link:
https://buildfarm.postgresql.org/cgi-bin/show_stage_log.pl?nm=mylodon&dt=2022-03-26%2000%3A02%3A...
This code is old, but mylodon wasn't doing that a week ago, so
Andres must've updated the compiler and/or changed its options.
kestrel and olingo are reporting it too, but they're new.
regards, tom lane
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To: pgsql-hackers@postgresql.org
Cc: tgl@sss.pgh.pa.us, pgsql-hackers@lists.postgresql.org, andres@anarazel.de, robertmhaas@gmail.com, thomas.munro@gmail.com
Subject: Re: Pointer subtraction with a null pointer
In-Reply-To: <49360.1648311192@sss.pgh.pa.us>
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