Re: Clang UndefinedBehaviorSanitize (Postgres14) Detected undefined-behavior

From: Noah Misch <noah(at)leadboat(dot)com>
To: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
Cc: Ranier Vilela <ranier(dot)vf(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Clang UndefinedBehaviorSanitize (Postgres14) Detected undefined-behavior
Date: 2020-08-28 02:42:08
Message-ID: 20200828024208.GC3096844@rfd.leadboat.com
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On Thu, Aug 27, 2020 at 12:57:20PM -0400, Alvaro Herrera wrote:
> On 2020-Aug-27, Ranier Vilela wrote:
> > indexcmds.c (1162):
> > memcpy(part_oids, partdesc->oids, sizeof(Oid) * nparts);
>
> Looks legit, and at least per commit 13bba02271dc we do fix such things,
> even if it's useless in practice.
>
> Given that no buildfarm member has ever complained, this exercise seems
> pretty pointless.

Later decision to stop changing such code:
https://postgr.es/m/flat/e1a26ece-7057-a234-d87e-4ce1cdc9eaa0(at)2ndquadrant(dot)com

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