Re: [buildfarm related] Machines gcc experimental failed test_lfind

From: Nathan Bossart <nathandbossart(at)gmail(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: John Naylor <johncnaylorls(at)gmail(dot)com>, "Hayato Kuroda (Fujitsu)" <kuroda(dot)hayato(at)fujitsu(dot)com>, "pgsql-hackers(at)lists(dot)postgresql(dot)org" <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: [buildfarm related] Machines gcc experimental failed test_lfind
Date: 2025-11-26 16:02:04
Message-ID: aSckfKvhDO1KVVXq@nathan
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On Wed, Nov 26, 2025 at 10:51:12AM -0500, Tom Lane wrote:
> If a problem is being observed only on animals with experimental
> compilers, it's almost surely a compiler bug and not something
> we should spend time on. In this case, the failure is in test
> code that hasn't changed in several years, making it even less
> likely that we broke it.

It looks like the failures are limited to AArch64, and commit f8f4afe did
change the code in question a bit. However, there are failures on older
PG versions where that commit was not applied, so the evidence does seem to
point to a compiler bug.

--
nathan

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