cpio crashes when LANG is empty.

Howto reproduce bug:
Ubuntu 10.04 LTS run in CT on OpenVZ (ubuntu-10.04-minimal_10.04_amd64.tar.gz).
1 ) If run perl-script

"
$backup_tmp="/tmp/backup.cpio";
print 1;
open (CPIO,"|cpio -ocBv > $backup_tmp");
print CPIO "/etc/apache2/httpd.conf";
close (CPIO);
print 2;
sub backup(@_){
    open (CPIO,"|cpio -ocBvA -O $backup_tmp 2> /dev/null");
    foreach (@_) {
        print CPIO $_."\n";
    }
    close (CPIO);
}
print 3;
backup("/etc/apache2/ports.conf");
print 4;
"

then output:

1/etc/apache2/httpd.conf
1 block
23*** glibc detected *** cpio: malloc(): memory corruption: 0x0000000001d68300 ***
======= Backtrace: =========
/lib/libc.so.6(+0x775b6)[0x7fbda05845b6]
/lib/libc.so.6(+0x7b6d8)[0x7fbda05886d8]
/lib/libc.so.6(__libc_malloc+0x6e)[0x7fbda058958e]
cpio[0x415df9]
cpio[0x403b48]
cpio[0x404043]
cpio[0x4043f6]
cpio[0x406dc2]
cpio[0x408e74]
/lib/libc.so.6(__libc_start_main+0xfd)[0x7fbda052bc4d]
cpio[0x402b19]
======= Memory map: ========
00400000-0041e000 r-xp 00000000 fd:02 10093364 /bin/cpio
0061d000-0061e000 r--p 0001d000 fd:02 10093364 /bin/cpio
0061e000-00620000 rw-p 0001e000 fd:02 10093364 /bin/cpio
01d68000-01d89000 rw-p 00000000 00:00 0 [heap]
7fbd9c000000-7fbd9c021000 rw-p 00000000 00:00 0
7fbd9c021000-7fbda0000000 ---p 00000000 00:00 0
7fbda02f6000-7fbda030c000 r-xp 00000000 fd:02 11404518 /lib/libgcc_s.so.1
7fbda030c000-7fbda050b000 ---p 00016000 fd:02 11404518 /lib/libgcc_s.so.1
7fbda050b000-7fbda050c000 r--p 00015000 fd:02 11404518 /lib/libgcc_s.so.1
7fbda050c000-7fbda050d000 rw-p 00016000 fd:02 11404518 /lib/libgcc_s.so.1
7fbda050d000-7fbda0685000 r-xp 00000000 fd:02 11404596 /lib/libc-2.11.1.so
7fbda0685000-7fbda0885000 ---p 00178000 fd:02 11404596 /lib/libc-2.11.1.so
7fbda0885000-7fbda0889000 r--p 00178000 fd:02 11404596 /lib/libc-2.11.1.so
7fbda0889000-7fbda088a000 rw-p 0017c000 fd:02 11404596 /lib/libc-2.11.1.so
7fbda088a000-7fbda088f000 rw-p 00000000 00:00 0
7fbda088f000-7fbda08af000 r-xp 00000000 fd:02 11404656 /lib/ld-2.11.1.so
7fbda0aa6000-7fbda0aa9000 rw-p 00000000 00:00 0
7fbda0aac000-7fbda0aae000 rw-p 00000000 00:00 0
7fbda0aae000-7fbda0aaf000 r--p 0001f000 fd:02 11404656 /lib/ld-2.11.1.so
7fbda0aaf000-7fbda0ab0000 rw-p 00020000 fd:02 11404656 /lib/ld-2.11.1.so
7fbda0ab0000-7fbda0ab1000 rw-p 00000000 00:00 0
7fff9d484000-7fff9d499000 rw-p 00000000 00:00 0 [stack]
7fff9d5fe000-7fff9d600000 r-xp 00000000 00:00 0 [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]
4

and any files not append to cpio.

2 ) # locale
LANG=
LC_CTYPE="POSIX"
LC_NUMERIC="POSIX"
LC_TIME="POSIX"
LC_COLLATE="POSIX"
LC_MONETARY="POSIX"
LC_MESSAGES="POSIX"
LC_PAPER="POSIX"
LC_NAME="POSIX"
LC_ADDRESS="POSIX"
LC_TELEPHONE="POSIX"
LC_MEASUREMENT="POSIX"
LC_IDENTIFICATION="POSIX"
LC_ALL=

The utility crash if LANG is empty.

3 ) If set locale: export LANG="ru_RU.UTF-8" then script done perfect:

1/etc/apache2/httpd.conf
1 блок
234

4 ) # locale
LANG=ru_RU.UTF-8
LC_CTYPE="ru_RU.UTF-8"
LC_NUMERIC="ru_RU.UTF-8"
LC_TIME="ru_RU.UTF-8"
LC_COLLATE="ru_RU.UTF-8"
LC_MONETARY="ru_RU.UTF-8"
LC_MESSAGES="ru_RU.UTF-8"
LC_PAPER="ru_RU.UTF-8"
LC_NAME="ru_RU.UTF-8"
LC_ADDRESS="ru_RU.UTF-8"
LC_TELEPHONE="ru_RU.UTF-8"
LC_MEASUREMENT="ru_RU.UTF-8"
LC_IDENTIFICATION="ru_RU.UTF-8"
LC_ALL=

 5 ) uname -r
2.6.32-042stab044.11 (kernel on host-system)