Notification fails if the first recipient address contains non-ASCII characters

[Emmanuel Blot]

(initially ​reported by Yann on trac-dev mailing list)

Python traceback

2006-07-31 15:32:56,703 Trac[web_ui] ERROR: Failure sending notification
on change to ticket #872: 'ascii' codec can't encode character u'\u0144'
in position 52: ordinal not in range(128)
Traceback (most recent call last):
 File "/usr/lib/python2.3/site-packages/trac/ticket/web_ui.py", line
531, in _do_save
   tn.notify(ticket, newticket=False, modtime=now)
 File "/usr/lib/python2.3/site-packages/trac/ticket/notification.py",
line 127, in notify
   NotifyEmail.notify(self, ticket.id, subject)
 File "/usr/lib/python2.3/site-packages/trac/notification.py", line
208, in notify
   Notify.notify(self, resid)
 File "/usr/lib/python2.3/site-packages/trac/notification.py", line
107, in notify
   self.send(torcpts, ccrcpts)
 File "/usr/lib/python2.3/site-packages/trac/ticket/notification.py",
line 248, in send
   hdrs['Message-ID'] = self.get_message_id(dest[0], self.modtime)
 File "/usr/lib/python2.3/site-packages/trac/ticket/notification.py",
line 234, in get_message_id
   dig = md5.new(s).hexdigest()
UnicodeEncodeError: 'ascii' codec can't encode character u'\u0144' in
position 52: ordinal not in range(128)

[Emmanuel Blot]

Should be fixed in [3582].