XtraBackup segfaults after period of time

Version:
XtraBackup 2.0.6-x86_64.

Description:
I have a large 64-bit mysql 5.0.77 instance, 700+GB.
When innobackupex is run, it begins to perform the backup. It will run for quite some time (transfers ~60GB) and then segfaults.

Command Invocation:
innobackupex --stream=tar ./ | gzip | ssh backup@backup_server "cd /var/lib/mysql/; tar izxf -"

Segfault:
Apr 8 19:17:23 db3 kernel: xtrabackup_51[12854]: segfault at 0000000000000084 rip 00000000004e59f5 rsp 0000000043debff0 error 4

Strace:
... { SNIP } ...
stat("/tmp/xtrabackup_suspended", 0x1e9e1140) = -1 ENOENT (No such file or directory)
wait4(12189, 0x7fff4c2d1fc4, WNOHANG, NULL) = 0
nanosleep({0, 100000000}, NULL) = 0
... { END SNIP } ...

stat("/tmp/xtrabackup_suspended", 0x1e9e1140) = -1 ENOENT (No such file or directory)
wait4(12189, 0x7fff4c2d1fc4, WNOHANG, NULL) = 0
nanosleep({0, 100000000}, NULL) = 0
stat("/tmp/xtrabackup_suspended", 0x1e9e1140) = -1 ENOENT (No such file or directory)
wait4(12189, 0x7fff4c2d1fc4, WNOHANG, NULL) = 0
nanosleep({0, 100000000}, NULL) = 0
stat("/tmp/xtrabackup_suspended", 0x1e9e1140) = -1 ENOENT (No such file or directory)
wait4(12189, 0x7fff4c2d1fc4, WNOHANG, NULL) = 0
nanosleep({0, 100000000}, NULL) = 0
stat("/tmp/xtrabackup_suspended", 0x1e9e1140) = -1 ENOENT (No such file or directory)
wait4(12189, 0x7fff4c2d1fc4, WNOHANG, NULL) = 0
nanosleep({0, 100000000}, 0) = ? ERESTART_RESTARTBLOCK (To be restarted)
--- SIGCHLD (Child exited) @ 0 (0) ---
restart_syscall(<... resuming interrupted call ...>) = 0
stat("/tmp/xtrabackup_suspended", 0x1e9e1140) = -1 ENOENT (No such file or directory)
wait4(12189, [{WIFSIGNALED(s) && WTERMSIG(s) == SIGSEGV}], WNOHANG, NULL) = 12189
write(2, "innobackupex: Error: ibbackup ch"..., 88innobackupex: Error: ibbackup child process has died at /usr/bin/innobackupex line 381.
) = 88
umask(0) = 022
umask(022) = 0
umask(066) = 022
chmod("/tmp/X5QwfzQ7jU", 0600) = 0
umask(022) = 066
fstat(4, {st_mode=S_IFREG|0600, st_size=36, ...}) = 0
stat("/tmp/X5QwfzQ7jU", {st_mode=S_IFREG|0600, st_size=36, ...}) = 0
stat("/tmp/X5QwfzQ7jU", {st_mode=S_IFREG|0600, st_size=36, ...}) = 0
close(4) = 0
umask(0) = 022
umask(022) = 0
umask(066) = 022
chmod("/tmp/X5QwfzQ7jU", 0600) = 0
umask(022) = 066
lstat("/tmp/X5QwfzQ7jU", {st_mode=S_IFREG|0600, st_size=36, ...}) = 0
unlink("/tmp/X5QwfzQ7jU") = 0
umask(0) = 022
umask(022) = 0
umask(066) = 022
chmod("/tmp/miPIhpfqzr", 0600) = 0
umask(022) = 066
fstat(3, {st_mode=S_IFREG|0600, st_size=0, ...}) = 0
stat("/tmp/miPIhpfqzr", {st_mode=S_IFREG|0600, st_size=0, ...}) = 0
stat("/tmp/miPIhpfqzr", {st_mode=S_IFREG|0600, st_size=0, ...}) = 0
close(3) = 0
umask(0) = 022
umask(022) = 0
umask(066) = 022
chmod("/tmp/miPIhpfqzr", 0600) = 0
umask(022) = 066
lstat("/tmp/miPIhpfqzr", {st_mode=S_IFREG|0600, st_size=0, ...}) = 0
unlink("/tmp/miPIhpfqzr") = 0
close(5) = 0
exit_group(2) = ?