Upgrade from 2.0.13 to 2.1.6 fails

[Boutell-users]

Produces this error:

 during Traceback (most recent call last):
  File "bin/update", line 781, in ?
    errors = main()
  File "bin/update", line 705, in main
    update_pending()
  File "bin/update", line 584, in update_pending
    addr = data[0].address
AttributeError: 'str' object has no attribute 'address'

My workaround: changed line 584 to addr = data[0].
data[0] seems to be a simple string containing the
email address of the user, so that works. No idea if
this is incorrect for certain other 2.0.x versions, of
course, so a correct fix would test whether data[0] is
an instance of str first.

[http://sourceforge.net/tracker/index.php?func=detail&aid=1318104&group_id=103&atid=100103]

[Boutell-users (boutell-users)]

P.S. I have seen reports of this problem on various mailing
lists but this is the first solution I've seen reported for it.