Re: git fsck segmentation fault

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Has this been looked at?  Martin?

On Fri, 28 Nov 2008, Simon Hausmann wrote:

> On Thursday 27 November 2008 Nicolas Pitre, wrote:
> > On Thu, 27 Nov 2008, Simon Hausmann wrote:
> > > On Thursday 27 November 2008 20:10:20 Simon Hausmann wrote:
> > > > On Thursday 27 November 2008 18:47:41 Nicolas Pitre wrote:
> > > > > On Thu, 27 Nov 2008, Simon Hausmann wrote:
> > > > > > Hi,
> > > > > >
> > > > > > when running git fsck --full -v (version 1.6.0.4.26.g7c30c) on a
> > > > > > medium sized
> > > > >
> > > > > That version doesn't exist in the git repo.
> > > >
> > > > Ah, oops, it was a merge commit, corresponding to maint as of 5aa3bd.
> > > >
> > > > > > (930M) repository I get a segfault.
> > > > > >
> > > > > > The backtrace indicates an infinite recursion. Here's the output
> > > > > > from the last few lines:
> > > > >
> > > > > [...]
> > > > >
> > > > > Could you try with latest master branch please?  It is more robust
> > > > > against some kind of pack corruptions that could send the code into
> > > > > infinite loops.
> > > >
> > > > Same problem with git version 1.6.0.4.790.gaa14a
> > >
> > > Forgot to paste the changed line numbers of the recursion:
> >
> > [...]
> >
> > Well... Your initial backtrace showed recursion in unpack_entry() which
> > was rather odd in the first place.  Your latest backtrace shows a loop
> > in make_object() which has nothing to do what so ever with
> > unpack_entry().  So the backtrace might not be really useful.
> >
> > I suspect you'll have to bisect git to find the issue, given that some
> > old version can be found to be good.  For example, does it work with
> > v1.5.2.5?
> 
> Ah yes, v1.5.2.5 works! (phew, and it verified that the repo is fine)
> 
> Ok, I bisected and "git bisect run" identified the following commit as first bad 
> commit:
> 
> commit 271b8d25b25e49b367087440e093e755e5f35aa9
> Author: Martin Koegler <mkoegler@xxxxxxxxxxxxxxxxx>
> Date:   Mon Feb 25 22:46:05 2008 +0100
> 
>     builtin-fsck: move away from object-refs to fsck_walk
> 
> 
> 
> 
> Simon
> 
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