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Re: [BUG] Weird breakages in t1450 #2 on NonStop

On Thu, Jan 11, 2018 at 04:39:04PM -0500, Randall S. Becker wrote:

> > executed because the test_commit fails with a non-zero git commit
> > completion code. There is no rn---- (actual r n 252 252 252 252) in
> > the objects directory - even the 'rn' does not correspond to
> > anything.. I am suspecting an unterminated string that ran into
> > freed memory somewhere, but that's speculative.
> Does anyone recall fixing this one at or near
> dfe46c5ce6e68d682f80f9874f0eb107e9fee797? There was a rewrite of
> sha1_file.c including link_alt_odb_entry where I am finding memory
> corruptions. I think I'm chasing something that was already fixed some
> time after 2.13.5 but the common parent to where I am is pretty far
> back compared to master.

I did a lot of work on link_alt_odb_entry() in the past year or so, and
I seem to recall seeing some cases where we could run into unterminated
memory in the error message.

Maybe dc732bd5cb (read_info_alternates: read contents into strbuf,