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Date: Thu, 4 Dec 2014 22:42:53 +0000
From: Adam Dinwoodie <adam AT dinwoodie DOT org>
To: cygwin AT cygwin DOT com
Subject: Re: [cygwin] Cygwin's git says "error: failed to read delta-pack base object"
Message-ID: <20141204224253.GA25789@dinwoodie.org>
References: <CAOOocNnOK9cRt=zbVZqL=ao1fG7kZGgxc+Qxn9VLUU48uHL1vQ AT mail DOT gmail DOT com>
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User-Agent: Mutt/1.5.21 (2010-09-15)

On Thu, Dec 04, 2014 at 04:27:51PM -0500, Dave Lindbergh wrote:
> You are more than welcome to read the strace output if that'll give
> you a clue (it doesn't give me one). All 1.7 MBytes of it are at
> http://nerdfever.com/files/strace.txt
> 
> (That comes from "strace git clone
> https://github.com/nerdfever/pic32mx-bmf >strace.txt")
> 
> I'm still stumped.

Okay, I'm looking through this trace in the hope of finding something.
The below looks suspicious, but I'm not sufficiently familiar with
either Git or Cygwin internals to know (a) whether this is a problem at
all or (b) if it is a problem, whether it's a symptom of an earlier
problem I haven't spotted on my brief skim.

      616 12330609 [main] git 2348 unlink_nt: Trying to delete \??\Z:\pic32mx-bmf\.git\objects\30, isdir = 1
     3190 12333799 [main] git 2348 unlink_nt: Setting delete disposition on \??\Z:\pic32mx-bmf\.git\objects\30 failed, status = 0xC0000101
     6362 12340161 [main] git 2348 unlink_nt: Try-to-bin \??\Z:\pic32mx-bmf\.git\objects\30
    24341 12364502 [main] git 2348 try_to_bin: \??\Z:\pic32mx-bmf\.git\objects\30, return bin_status 3
      645 12365147 [main] git 2348 unlink_nt: Try \??\Z:\pic32mx-bmf\.git\objects\30 again
    12250 12377397 [main] git 2348 unlink_nt: Setting delete disposition on \??\Z:\pic32mx-bmf\.git\objects\30 failed, status = 0xC0000101
    22680 12400077 [main] git 2348 unlink_nt: Try \??\Z:\pic32mx-bmf\.git\objects\30 again
     8487 12408564 [main] git 2348 unlink_nt: Setting delete disposition on \??\Z:\pic32mx-bmf\.git\objects\30 failed, status = 0xC0000101
     1903 12410467 [main] git 2348 unlink_nt: Try \??\Z:\pic32mx-bmf\.git\objects\30 again
    <above two lines repeated several more times>

I'm also curious about the difference between the MinGW32 version and
the Cygwin version.  Possibly it's barking up completely the wrong tree,
but what versions of each are you running?

In the hunt for a simple test case, is it just this repository that's
causing problems, or are others being difficult too?  Specifically, I'm
wondering about a trivial repository with only a handful of objects.

Do you know anything about that 300bdeb object? In particular, is it
particularly big or unusual in some other way?

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