Re: What's cooking in git.git (Jan 2025, #05; Fri, 17)

> Karthik Nayak <karthik.188@gmail.com> writes:
>
>> Junio C Hamano <gitster@pobox.com> writes:
>>
>>> * kn/reflog-migration-fix (2025-01-15) 1 commit
>>>   (merged to 'next' on 2025-01-16 at ae8f9ce9a0)
>>>  + reftable: write correct max_update_index to header
>>>  (this branch is used by kn/reflog-migration-fix-followup.)
>>>
>>>  "git refs migrate" for migrating reflog data was broken.
>>>
>>>  Will merge to 'master'.
>>>  cf. <Z4mUizLNUdq_1BgY@tapette.crustytoothpaste.net>
>>>  source: <CAOLa=ZTL9n_DPhNr49XAd6bT838kc09oVx_AH7Pb4o8VK_xQ9w@mail.gmail.com>
>>
>> This seems to be breaking on 'next'. I tested it locally with
>>
>>   GIT_TEST_DEFAULT_REF_FORMAT=reftable meson test -v --test-args='-i' t1400-update-ref
>>
>> my local tests were made on files backend, and it didn't trigger on the
>> CI either for some reason (I shall investigate that soon). But dscho
>> (CC'd) reported that macos builds for reftable were failing [1] for his
>> branch and I could bisect it to this.
>>
>> I'm yet to understand why this fails and also why the CI didn't notify
>> of the issue. But that is something I shall do next. For now we need to
>> remove it from next.
>>
>> [1]: https://github.com/dscho/git/actions/runs/12906424058/job/35987723223
>
> This is reproducible when the leak sanitizier is enabled and tested
> against reftable:
>
> So setting up meson with:
>   CC=clang meson setup --reconfigure -Db_sanitize=address,undefined build
> and running the test in the build folder with:
>   GIT_TEST_DEFAULT_REF_FORMAT=reftable meson test -v
> --test-args='-ixd' t1400-update-ref
>
> reproduces the issue. I haven't found the root cause yet, but will
> mostly call it a day and get back to this tomorrow.