Re: segfault with git rebase --abort

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Am Sonntag, dem 24.03.2024 um 14:54 -0700 schrieb Junio C Hamano:
> Wolfgang Rohdewald <wolfgang@xxxxxxxxxxxx> writes:
> 
> > git rebase -i
> > 
> > git rebase --abort # boom
> > 
> This thread _might_ be relevant.
> 
>   https://lore.kernel.org/git/20240218114936.1121077-1-marcel@xxxxxxxxxxxx/
> 
> The "might" is because the symptom is a sign of corruption of the
> rerere database but the discussion or the patch in there do not know
> how such a corruption happened in the first place.
> 
> If you rebuild Git with Marcel's patch (there is v2 downthread, and
> we have been waiting for a v3) and it improves the situation, please
> do let us know.

Yes, the patch resolved my problem. Thanks a lot!

>From the bash history below, this might be the sequence:

(git 2.39)

I think I forgot to remove one line of "<<<<<<< HEAD" before doing the first git add.

Because git rebase --abort then told me about the lockfile, the segfault probably
already happened with the second git rebase --continue.
and from then on all git rebase --abort segfaulted.

Oh - and I definitively did not mess around in .git

I do have a backup of the repo, so if you want me to look up things ...

git checkout master
git rebase -i
vi servertable.py
git add servertable.py  # here I probably left that <<<< HEAD line
git rebase --continue
vi servertable.py 
git add servertable.py
git rebase --continue   # I think this already segfaulted
git status
df                      # plenty of free space
git rebase --abort
rm .git/MERGE_RR.lock


Since the patch is about rerere, I now did:

wrpc:~/tmp/kajongg (master|REBASE-i) git rerere status
src/servertable.py
wrpc:~/tmp/kajongg (master|REBASE-i) git rerere diff
error: Could not stat .git/rr-cache/a8ec6f624ee23ef2e37148a8172ebac3c6639f93/preimage: No such file or directory
fatal: unable to generate diff for '.git/rr-cache/a8ec6f624ee23ef2e37148a8172ebac3c6639f93'

wrpc:~/tmp/kajongg/.git/rr-cache (GIT_DIR!|REBASE-i) ls -lrt | tail -3
drwxr-xr-x 2 wr wr 4096 Mar 24 16:19 e6c7ce944f313fa718cad6875d4ee784c098868c
drwxr-xr-x 2 wr wr 4096 Mar 24 16:19 d0a20608fa0aafd2b234cce432ce7af567c1a94a
drwxr-xr-x 2 wr wr 4096 Mar 24 16:43 a8ec6f624ee23ef2e37148a8172ebac3c6639f93
wrpc:~/tmp/kajongg/.git/rr-cache (GIT_DIR!|REBASE-i) ls -l a8ec6f624ee23ef2e37148a8172ebac3c6639f93/
total 0


-- 
mit freundlichen Grüssen

Wolfgang Rohdewald





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