IndexError while restoring

[Steffen Sledz]

I tried to restore mails into another mailbox which i backed up with the same version (Revision 31 of Branch lp:~cfraire/backup-gmail/devel) a few minutes before and hit this error:

./backup_gmail.py -P -k -r BackupDir
Username: <email address hidden>
Password:
Traceback (most recent call last):970/79450]
  File "./backup_gmail.py", line 852, in <module>
    grestore.execute()
  File "./backup_gmail.py", line 640, in execute
    uid = self.__appendMessage(mail, date2822, labelTarget)
  File "./backup_gmail.py", line 580, in __appendMessage
    return re.findall("APPENDUID [0-9]+ ([0-9]+)", msg[0])[0]
IndexError: list index out of range