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From: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
To: Adam Dinwoodie <adam@dinwoodie.org>
Cc: Git Mailing List <git@vger.kernel.org>
Subject: Re: Git v2.13.1 SHA1 very broken
Date: Mon, 5 Jun 2017 23:05:24 +0200	[thread overview]
Message-ID: <CACBZZX6vOr+ZjUaAf8i1xdjEFfY_Exj+_Xn2-1u0RcWoLy+X1g@mail.gmail.com> (raw)
In-Reply-To: <20170605203409.GB25777@dinwoodie.org>

On Mon, Jun 5, 2017 at 10:34 PM, Adam Dinwoodie <adam@dinwoodie.org> wrote:
> I'm trying to compile Git v2.13.1 to release for Cygwin, but it appears
> a010391 ("sha1dc: update from upstream", 2017-05-20) is breaking a very
> significant number of test cases in both 32-bit and 64-bit Cygwin
> builds.
>
> The first failure is t0000.46 "validate object ID of a known tree"; output with
> -x and -v is below, although it's not very interesting:
>
>     expecting success:
>             test "$tree" = 7bb943559a305bdd6bdee2cef6e5df2413c3d30a
>
>     ++ test ceb282701536fe61bea01075664405caa7d6343f = 7bb943559a305bdd6bdee2cef6e5df2413c3d30a
>     + test_eval_ret_=1
>     + want_trace
>     + test t = t
>     + test t = t
>     + set +x
>     error: last command exited with $?=1
>     not ok 46 - validate object ID of a known tree
>     #
>     #               test "$tree" = 7bb943559a305bdd6bdee2cef6e5df2413c3d30a
>     #
>
> I have no idea where to even begin debugging this, but I'm happy to take
> pointers / try things out on my box.

That looks scary, can you please comment out this:

    #define SHA1DC_ALLOW_UNALIGNED_ACCESS

In sha1dc/sha1.c and see if that helps, alternatively comment out the
ifdefs guarded by "#ifdef _MSC_VER" calls in sha1dc/sha1.c

The functional differences between 2.13.0 and 2.13.1 on that platform
should be none aside from possibly those changes, unless I've missed
something.

  reply	other threads:[~2017-06-05 21:05 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-06-05 20:34 Git v2.13.1 SHA1 very broken Adam Dinwoodie
2017-06-05 21:05 ` Ævar Arnfjörð Bjarmason [this message]
2017-06-05 23:20   ` Ramsay Jones
2017-06-06  0:11     ` Ramsay Jones
2017-06-06  1:20   ` Junio C Hamano
2017-06-06 10:03     ` Adam Dinwoodie
2017-06-06 11:55       ` Junio C Hamano
2017-06-06 12:43         ` Adam Dinwoodie
2017-06-06 14:47           ` Continous Integration (was: RE: Git v2.13.1 SHA1 very broken) Jason Pyeron
2017-06-06 15:04             ` Lars Schneider
2017-07-02 20:35               ` Adam Dinwoodie
2017-07-03 12:34                 ` Johannes Schindelin
2017-06-06 15:12           ` [PATCH 0/3] update sha1dc Ævar Arnfjörð Bjarmason
2017-06-06 15:12             ` [PATCH 1/3] sha1dc: update from upstream Ævar Arnfjörð Bjarmason
2017-06-06 15:12             ` [PATCH 2/3] sha1dc: optionally use sha1collisiondetection as a submodule Ævar Arnfjörð Bjarmason
2017-06-06 18:48               ` Stefan Beller
2017-06-06 19:03                 ` Ævar Arnfjörð Bjarmason
2017-06-06 19:09                   ` Stefan Beller
2017-06-06 15:12             ` [PATCH 3/3] sha1collisiondetection: automatically enable when submodule is populated Ævar Arnfjörð Bjarmason
2017-06-06 18:23             ` [PATCH 0/3] update sha1dc Stefan Beller
2017-06-06 18:51               ` Ævar Arnfjörð Bjarmason
2017-06-06 19:01                 ` [PATCH] sha1dc: ignore indent-with-non-tab whitespace violations Jeff King
2017-06-06 19:04                   ` Ævar Arnfjörð Bjarmason
2017-06-06 19:05                   ` Stefan Beller
2017-06-13  2:09             ` [PATCH 0/3] update sha1dc Liam R. Howlett
2017-06-06 12:49         ` Git v2.13.1 SHA1 very broken Morten Welinder

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