Better error throwing and ID sequences

[Nicolas Sebrecht]

On Fri, Aug 19, 2011 at 06:42:36PM +0200, Nicolas Sebrecht wrote:
> On Thu, Aug 18, 2011 at 09:07:50AM +0200, Sebastian Spaeth wrote:
> > On Wed, 17 Aug 2011 20:52:24 +0200, Nicolas Sebrecht <nicolas.s-dev at laposte.net> wrote:
> > > The topic looks good but I had error to merge it. I tried each commit
> > > since the bumped imaplib2 merge.
> > 
> > I just rebased to current next branch without conflicts. Weird. In any
> > case, here comes the updated patch series as a reply.
> 
> Whole topic merged. Thank you much!

It introduces a bug:

ERROR: Exceptions occurred during the run!
 ERROR: Aborting folder sync 'INBOX.ABUL' [acc: 'nis']
  FETCHING UIDs in folder [Remotenis]INBOX.ABUL failed. Server responded
'[NO] ['No matching messages']'
 ERROR: ERROR in syncfolder for dev.gmx folder Drafts: Traceback (most
recent call last):
  File "/usr/lib64/python2.7/site-packages/offlineimap/accounts.py",
line 343, in syncfolder
    remotefolder.cachemessagelist()
  File "/usr/lib64/python2.7/site-packages/offlineimap/folder/IMAP.py",
line 174, in cachemessagelist
    messagestr = messagestr.split(' ', 1)[1]
AttributeError: 'NoneType' object has no attribute 'split'

-- 
Nicolas Sebrecht