[Tickets #10422] Synchronization fails when turba objects have been deleted

[bugs at horde.org]

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Ticket URL: http://bugs.horde.org/ticket/10422
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  Ticket             | 10422
  Created By         | hordebug at zulan.net
  Summary            | Synchronization fails when turba objects have been
                     | deleted
  Queue              | Turba
  Version            | Git master
  Type               | Bug
  State              | Unconfirmed
  Priority           | 2. Medium
  Milestone          |
  Patch              | 1
  Owners             |
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hordebug at zulan.net (2011-08-11 15:43) wrote:

I ran into the following error when synchronizing my contacts with syncml:

PHP Fatal error:  Call to a member function isGroup() on a non-object  
in /home/tilsche/www/horde/turba/lib/Api.php on line 542

bd5d69849182866729bfc77aa097ca8e4ecd1281 introduced the filtering of  
sync results for groups. This fails for non-existing turba_objects, it  
seems to be the case when a turba object has been deleted - it is in  
the history but cannot be retrieved (and cannot be checked for being a  
group or not).

I have implemented a quick fix by checking for non-null before  
checking for group.

http://zulan.net/0002-Fixed-bug-when-tracking-the-history-of-deleted-turba.patch

It works for me but I am not sure if this covers all cases (e.g. what  
about deleted groups?).