On Wed, Oct 16, 2013 at 3:34 PM, Jeff King <p...@peff.net> wrote:
> I was recently presented with a repository with a corrupted packfile,
> and was asked if the data was recoverable. This post-mortem describes
> the steps I took to investigate and fix the problem. I thought others
> might find the process interesting, and it might help somebody in the
> same situation.
> I started with an fsck, which found a problem with exactly one object
> (I've used $pack and $obj below to keep the output readable, and also
> because I'll refer to them later):
>     $ git fsck
>     error: $pack SHA1 checksum mismatch
>     error: index CRC mismatch for object $obj from $pack at offset 51653873
>     error: inflate: data stream error (incorrect data check)
>     error: cannot unpack $obj from $pack at offset 51653873

I wonder if we should protect the sha-1 and pathname tables in packv4
with CRC too. A bit flipped in there could cause stream of corrupt
objects and make it hard to pinpoint the corrupt location..
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