[Evolution] Bug#640851: Bug#640851: evolution: local mail files no longer accessible

[Viktor Horvath]

There _is_ a nasty bug lurking here. Just did a system upgrade from Squeeze 
(Evolution 2.30.3-5) to testing (3.4.4-1). The result is the same as 
described by the original reporter and by a French user ("everything worked 
fine except that all locally stored mail in Evolution has gone" [1]). 
Specifically:

* Local folders "Inbox", "Sent" are empty and without formerly existing 
subfolders;

* There is a local folder "#evolution" with one subfolder "sbd", no 
messages (smells of a bad migration);

* There was no visible migration assistent, however, if one starts 
evolution from command-line, one sees some migration-related output. 

* I restored my former .evolution directory from backups and started to 
play around: the command-line output from the migration was not helpful: 
lots of copying files, some errors, but nowhere does it look like a 
conversion mbox -> maildir was even attempted. (I can mail log files to 
anyone interested.)

* After the first run of the new Evolution, ~/.evolution is quite empty but 
still existant with some files which couldn't be moved (addressbook stuff, 
XML files ) and ~/.local/share/evolution has all data, in a rather messy 
file tree though. All mboxes are still there, but Evolution does not show 
them. "mutt -Rf" sees everything.

* Subsequent runs start new migration attempts (certainly due to 
~/.evolution present) but don't yield anything new.

* Deleting index (and other?) data (*ev-summary*, *.ibex*, folders.db, 
*.cmeta), either before or after migration, did not help.

* My "News and Feeds" have also somehow disappeared, even though the RSS 
plugin itself is there.

I guess I'll have to reanimate my old data with a Squeeze Evolution on 
another system and try backup/restore, or to import mboxes individually.

All the best,
Viktor.

[1] http://www.debian-fr.org/perte-mails-dans-evolution-lors-du-passage-squeeze-wheezy-t41598.html
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