Re: Can't build first git commit
- From
Jeff King <peff@peff.net>
- Date
- Mar 6, 2019, 21:57 UTC
- Message-ID
- <20190306215752.GC32630@sigill.intra.peff.net>
- In-Reply-To
- <1551905579.1727.8.camel@libero.it>
On Wed, Mar 06, 2019 at 09:52:59PM +0100, Fabio Aiuto wrote:
Show 17 quoted lines
> Found this error
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x00401628 in verify_hdr (hdr=0x0, size=32) at read-cache.c:192
> 192 if (hdr->signature != CACHE_SIGNATURE)
>
> when tracing on line
>
> static int verify_hdr(struct cache_header *hdr, unsigned long size)
> {
> SHA_CTX c;
> unsigned char sha1[20];
>
> if (hdr->signature != CACHE_SIGNATURE)<--- this line
>
> inside file read-cache.c
> What's going on?Well, hdr is NULL, so you can't dereference it. Without knowing more about how you called it, it's hard to say. But do note that the index format has been updated once or twice (as well as the pack format). You probably can't just chdir into a clone made by a recent Git and expect ancient versions to read it.
You'll have to start a repo from scratch, or clone an existing with the old version (which will be tricky; you might have to use a modern upload-pack to represent the server side, but I think that first version doesn't even have any fetch capabilities at all).
It might also be possible to convince modern Git to write out in old formats that ancient Git will understand, but I don't know the right config knobs to tweak offhand.
-Peff