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Re: could not freshen shared index ..../sharedindex.0000000000000000000000000000000000000000'




On Sat, Feb 9, 2019 at 4:58 PM Luke Diamand <luke@xxxxxxxxxxx> wrote:
>
> On Sat, 9 Feb 2019 at 05:01, Duy Nguyen <pclouds@xxxxxxxxx> wrote:
> >
> > On Fri, Feb 8, 2019 at 11:39 PM Luke Diamand <luke@xxxxxxxxxxx> wrote:
> > >
> > > On Fri, 8 Feb 2019 at 10:02, Duy Nguyen <pclouds@xxxxxxxxx> wrote:
> > > >
> > > > On Wed, Feb 06, 2019 at 10:25:25AM +0000, Luke Diamand wrote:
> > > > > I've recently started seeing a lot of this message when doing a rebase:
> > > > >
> > > > >    warning: could not freshen shared index
> > > > > '/home/ldiamand/git/dev_full/.git/worktrees/gcc8-take-2/sharedindex.0000000000000000000000000000000000000000'
> > > >
> > > > There are only two places in the code that could print this. The one
> > > > in read_index_from() can't happen unless is_null_oid() is broken (very
> > > > very unlikely).
> > > >
> > > > The other one is in write_locked_index() which could happen in theory
> > > > but I don't understand how it got there. If you could build git, could
> > > > you try this patch and see if it helps?
> > >
> > > They've gone away!
> >
> > Great! Since you seem able to reproduce this (and can build git!)
> > could you try bisect to pin point the commit that causes this problem?
> > That would help a lot. I think you could start maybe from v2.19.0
>
> The first bad commit was d658196f3c4b2478ebdff638e2c3e4fb2f9cbba2.

Thanks! I could reproduce it and I think I know what the problem is
now. Patches coming soon.

>
> $ git show d658196f3c4b2478ebdff638e2c3e4fb2f9cbba2
> commit d658196f3c4b2478ebdff638e2c3e4fb2f9cbba2 (refs/bisect/bad)
> Merge: 6b0f1d9c47 7db118303a
> Author: Junio C Hamano <gitster@xxxxxxxxx>
> Date:   Wed May 23 14:38:22 2018 +0900
>
>     Merge branch 'en/unpack-trees-split-index-fix'
>
>     The split-index feature had a long-standing and dormant bug in
>     certain use of the in-core merge machinery, which has been fixed.
>
>     * en/unpack-trees-split-index-fix:
>       unpack_trees: fix breakage when o->src_index != o->dst_index
>
> The test I'm doing is just:
>
> 1. git checkout some_tag
> 2. git rebase -i HEAD~5
> 3. Swap the top and bottom commit
> 4. repeat
>
> I just chose "5" as my first wild guess, other numbers are also available.
>
> With "5" I get 3 lots of:
>    warning: could not freshen shared index
> '.git/sharedindex.0000000000000000000000000000000000000000'
>
> As far as I can tell the actual rebasing is fine.



-- 
Duy