Re: Reproducible, corrupt packfile after fresh git-svn checkout message 3 of 20)

From: gitml.jexpert@recursor.net <gitml.jexpert@recursor.net>
Date: Aug 8, 2013, 13:12 UTC
Message-ID: <9aa1672d5c04994f416dccd84b5983c960c0fdf9@localhost>
In-Reply-To: <87fvuk2wl0.fsf@linux-k42r.v.cablecom.net>

Great! Thank you all guys for your extensive instructions!

@Thomas: I only had to add libexpat1-dev to the list.

I checked out Git v1.8.3.4 as this was my used verion and built as instructed. The error is still reproducible using the "CFLAGS = -O0 -g" build.

So - now the puzzling thing: With valgrind it seems to work! If I run it plain, it doesn't:

/tmp/project.git $ valgrind --track-origins=yes ~/projects/git.git/git-fsck ==3431== Memcheck, a memory error detector ==3431== Copyright (C) 2002-2011, and GNU GPL'd, by Julian Seward et al. ==3431== Using Valgrind-3.7.0 and LibVEX; rerun with -h for copyright info ==3431== Command: /home/ben/projects/git.git/git-fsck ==3431== ==3431== Warning: set address range perms: large range [0x70b5000, 0x2b0ff000) (defined) Checking object directories: 100% (256/256), done. ==3431== Warning: set address range perms: large range [0x3959d000, 0x49d53000) (defined) Checking objects: 100% (63588/63588), done. Checking connectivity: 68696, done. ==3431== ==3431== HEAP SUMMARY: ==3431== in use at exit: 7,574,911 bytes in 15,428 blocks ==3431== total heap usage: 422,498 allocs, 407,070 frees, 4,396,939,465 bytes allocated ==3431== ==3431== LEAK SUMMARY: ==3431== definitely lost: 0 bytes in 0 blocks ==3431== indirectly lost: 0 bytes in 0 blocks ==3431== possibly lost: 0 bytes in 0 blocks ==3431== still reachable: 7,574,911 bytes in 15,428 blocks ==3431== suppressed: 0 bytes in 0 blocks ==3431== Rerun with --leak-check=full to see details of leaked memory ==3431== ==3431== For counts of detected and suppressed errors, rerun with: -v ==3431== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 2 from 2) /tmp/project.git $ ~/projects/git.git/git-fsck Checking object directories: 100% (256/256), done. error: packed 49cdd0b21a351f3366008615d2cf8d03ca943978 from .git/objects/pack/pack-6a6f5355584a5d71215d5fc867ce09602ceab533.pack is corrupt *** glibc detected *** <unknown>: free(): invalid pointer: 0x00007f8576682010 *** ======= Backtrace: ========= /lib/x86_64-linux-gnu/libc.so.6(+0x7eb96)[0x7f85ad765b96] [0x4e727c]

I'm using a i5-3340M on Linux Mint 14 with a offical Linux 3.9.9 gcc (Ubuntu/Linaro 4.7.2-2ubuntu1) 4.7.2

Any further hints?

Show 16 quoted lines

> Try something like
>
>   # The package names might be wrong and/or you may need additional -dev
>   # packages, I don't know the specifics for ubuntu
>   apt-get install gcc make valgrind libcurl-dev zlib-dev
>   cd
>   git clone git://git.kernel.org/pub/scm/git/git.git
>   cd git
>   echo 'CFLAGS = -O0 -g' >>config.mak
>   make
>   cd /path/to/repo
>   valgrind --track-origins=yes ~/git/git-fsck
>
> It'll be very slow, at least 20x the normal runtime, so don't be
> surprised if it doesn't seem to get anywhere at first.
>