Yes, the bug is known, but until now only on Slackware which lacks magic.mgc files.

Debian package has this file, now I do not unterstand why MLDonkey
tries to load /etc/magic first
http://packages.debian.org/stable/libs/libmagic1

Hi,

Now the problem also happens to me. I've got the following stacktrace when I run mlnet:

#0  0xa7ce64ee in memset () from /lib/tls/i686/cmov/libc.so.6
#1  0xffffffff in ?? ()
#2  0xa7ed616d in apprentice_file (ms=0x84f6f70, magicp=0xaf892fdc,
    nmagicp=0xaf892fd8, fn=0x84f8b50 "/etc/magic", action=0)
    at apprentice.c:567
#3  0xa7ed7615 in file_apprentice (ms=0x84f6f70, fn=0x84f8b50 "/etc/magic",
    action=0) at apprentice.c:183
#4  0xa7ed56c2 in magic_load (ms=0x84f6f70, magicfile=0x0) at magic.c:156
#5  0x082f40b9 in std::operator+<char, std::char_traits<char>, std::allocator<char> > ()
#6  0x081ea496 in ?? ()
#7  0xa7a8d864 in ?? ()
#8  0xa7a8d864 in ?? ()
#9  0x0812d6c6 in ?? ()
#10 0xaf893088 in ?? ()
#11 0x0812d6a5 in ?? ()
#12 0x084dbfa4 in ?? ()
#13 0x44e2ed79 in ?? ()
#14 0x00000000 in ?? ()

The contents of my /etc/magic file are not customized:

# Magic local data for file(1) command.
# Insert here your local magic data. Format is described in magic(5).

# Objective Caml file types

1.       string  Caml1999        Objective caml

>8      string  X               exec file
>8      string  I               interface file\ (*.cmi)
>8      string  O               object file\ (*.cmo)
>8      string  A               library file\ (*.cma)
>8      string  Y               native object file\ (*.cmx)
>8      string  Z               native library file\ (*.cmxa)
>9      string  >\0             (Version %3.3s).

I have libmagic1 4.17-3. Feel free to tell me if you need me to do further tests.

PS: I didn't find how to reopen the bug.

Using Debian unstable with latest packages:
ii  libmagic-dev                   4.17-2                         File type determination library (development)
ii  libmagic1                      4.17-2                         File type determination library using "magic" numbers

ocamlc -v
The Objective Caml compiler, version 3.09.2

gcc -v
gcc version 4.1.2 20060715 (prerelease) (Debian 4.1.1-9)

compiled MLDonkey CVS from source with Debian Ocaml package.
MLDonkey starts without problems here. Can you reproduce the
problem on your machine?

"debug_dir ." also works:
37 entries in dir .
store_1024
     data
Mime application/octet-stream

store_512
     data
Mime application/octet-stream

bw_h_updown.png
     PNG image data, 630 x 200, 4-bit colormap, non-interlaced
Mime image/png

bw_updown.png
     PNG image data, 630 x 200, 4-bit colormap, non-interlaced
Mime image/png

store_256
     data
Mime application/octet-stream

mlnet.pid
     ASCII text
Mime text/plain; charset=us-ascii

config_files_space.tmp
     ASCII text, with very long lines, with no line terminators
Mime text/plain; charset=us-ascii

file_sources.ini
     ASCII English text
Mime text/plain; charset=us-ascii

gnutella.ini
     ASCII English text
Mime text/plain; charset=us-ascii

gnutella2.ini
     ASCII English text
Mime text/plain; charset=us-ascii

mlnet.log
     ASCII text
Mime text/plain; charset=us-ascii

fileTP.ini
     ASCII English text
Mime text/plain; charset=us-ascii

fasttrack.ini
     ASCII English text
Mime text/plain; charset=us-ascii

donkey.ini
     ASCII English text, with very long lines
Mime text/plain; charset=us-ascii

stats_bt.ini
     ASCII English text
Mime text/plain; charset=us-ascii

bittorrent.ini
     ASCII English text
Mime text/plain; charset=us-ascii

onlinesig.dat
     ASCII text
Mime text/plain; charset=us-ascii

stats.ini
     ASCII English text
Mime text/plain; charset=us-ascii

stats_mod.ini
     ASCII English text
Mime text/plain; charset=us-ascii

users.ini
     ASCII English text
Mime text/plain; charset=us-ascii

downloads.ini
     ASCII English text
Mime text/plain; charset=us-ascii

shared_files_new.ini
     ASCII English text
Mime text/plain; charset=us-ascii

mldonkey_submit
     perl script text executable
Mime application/x-perl

mlsubmit.reg
     ASCII text
Mime text/plain; charset=us-ascii

torrents
     directory
Mime application/x-not-regular-file

servers.ini
     ASCII English text
Mime text/plain; charset=us-ascii

friends.ini
     ASCII English text
Mime text/plain; charset=us-ascii

searches.ini
     ASCII English text
Mime text/plain; charset=us-ascii

files.ini
     ASCII English text
Mime text/plain; charset=us-ascii

shared_files.ini
     ASCII English text
Mime text/plain; charset=us-ascii

old_config
     directory
Mime application/x-not-regular-file

temp
     directory
Mime application/x-not-regular-file

web_infos
     directory
Mime application/x-not-regular-file

searches
     directory
Mime application/x-not-regular-file

incoming
     directory
Mime application/x-not-regular-file

shared
     directory
Mime application/x-not-regular-file

mlnet_strings.en
     Mathematica 3.0 notebook
Mime text/plain; charset=us-ascii