evg@evg ~ $ multicat X-Files.mp3 224.0.0.1:5004
[1]    7665 segmentation fault (core dumped)  multicat X-Files.mp3 224.0.0.1:5004
evg@evg ~ $gdb multicat core
GNU gdb (GDB) 7.2-alt2.1 (ALT Linux)
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i586-alt-linux".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/bin/multicat...(no debugging symbols found)...done.
[New Thread 7665]
Reading symbols from /lib/librt.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/librt.so.1
Reading symbols from /lib/libc.so.6...Reading symbols from /usr/lib/debug/lib/libc-2.11.3.so.debug...done.
done.
Loaded symbols for /lib/libc.so.6
Reading symbols from /lib/libpthread.so.0...(no debugging symbols found)...done.
[Thread debugging using libthread_db enabled]
Loaded symbols for /lib/libpthread.so.0
Reading symbols from /lib/ld-linux.so.2...Reading symbols from /usr/lib/debug/lib/ld-2.11.3.so.debug...done.
done.
Loaded symbols for /lib/ld-linux.so.2
Core was generated by `multicat X-Files.mp3 224.0.0.1:5004'.
Program terminated with signal 11, Segmentation fault.
#0  _IO_fread (buf=0xbfd35874, size=8, count=1, fp=0x0) at iofread.c:48
48        _IO_acquire_lock (fp);
(gdb) bt
#0  _IO_fread (buf=0xbfd35874, size=8, count=1, fp=0x0) at iofread.c:48
#1  0x0804914e in ?? ()
#2  0xb76e0c96 in __libc_start_main (main=0x80493e0, argc=3, ubp_av=0xbfd35a14, init=0x804b210, fini=0x804b200, 
    rtld_fini=0xb78587a0 <_dl_fini>, stack_end=0xbfd35a0c) at libc-start.c:226
#3  0x08048c91 in ?? ()
(gdb)