Re: [buildfarm related] Machines gcc experimental failed test_lfind

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Nathan Bossart <nathandbossart(at)gmail(dot)com>
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 16:10:31
Message-ID: 1599628.1764173431@sss.pgh.pa.us
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Nathan Bossart <nathandbossart(at)gmail(dot)com> writes:
> 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.

The present failures started much more recently than f8f4afe ...
leafhopper, for example, was okay until about a day ago.
Also, AFAICS f8f4afe was HEAD-only, but leafhopper is also
failing in v18. (No evidence as yet about older branches.)

Anyway, this is exactly the sort of analysis that we shouldn't
be doing.

regards, tom lane

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