GNU bug report logs - #68668
30.0.50; Invalid hash table test: tab-bar--auto-width-hash-test

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From: Mattias Engdegård <mattias.engdegard <at> gmail.com>
To: Gerd Möllmann <gerd.moellmann <at> gmail.com>
Cc: Mekeor Melire <mekeor <at> posteo.de>, john muhl <jm <at> pub.pink>, 68668 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>, Andrea Corallo <acorallo <at> gnu.org>, Stefan Monnier <monnier <at> iro.umontreal.ca>
Subject: bug#68668: 30.0.50; Invalid hash table test: tab-bar--auto-width-hash-test
Date: Wed, 31 Jan 2024 12:55:05 +0100

31 jan. 2024 kl. 11.29 skrev Gerd Möllmann <gerd.moellmann <at> gmail.com>:

> That's get_hash_table_user_test in fns.c which only keeps the first
> occurrence of user-defined hash tests which have the same definition.

Oops, sorry about that. Thank you for finding this anomaly!

It's indeed a bit unexpected. It doesn't affect hash table operations as such, only the output of `hash-table-test` and the print representation. However, this means that a hash table couldn't be deserialised under some circumstances, which is a problem.

A correction has been pushed (7e85311a911).

I'm still not really satisfied with the current implementation of user-defined tests. I have a patch which turns hash-table tests into Lisp objects but it seems to slow down basic operations for some reason which is why I haven't used it yet.

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