pgsql: Make multixact error message more explicit

From: Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>
To: pgsql-committers(at)lists(dot)postgresql(dot)org
Subject: pgsql: Make multixact error message more explicit
Date: 2022-11-24 09:46:35
Message-ID: E1oy8oU-000c3v-3o@gemulon.postgresql.org
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Make multixact error message more explicit

There are recent reports involving a very old error message that we have
no history of hitting -- perhaps a recently introduced bug. Improve the
error message in an attempt to improve our chances of investigating the
bug.

Per reports from Dimos Stamatakis and Bob Krier.

Backpatch to 11.

Discussion: https://postgr.es/m/CO2PR0801MB2310579F65529380A4E5EDC0E20A9@CO2PR0801MB2310.namprd08.prod.outlook.com
Discussion: https://postgr.es/m/17518-04e368df5ad7f2ee@postgresql.org

Branch
------
REL_12_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/de95928ea071b5c677ceaa0d13d4ea15d88cec43

Modified Files
--------------
src/backend/access/transam/multixact.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

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