[Akonadi] [Bug 405682] New: akonadi_imap_resource and akonadiserver crashe every couple of minutes

[Aldoo]

https://bugs.kde.org/show_bug.cgi?id=405682

            Bug ID: 405682
           Summary: akonadi_imap_resource and akonadiserver crashe every
                    couple of minutes
           Product: Akonadi
           Version: unspecified
          Platform: Neon Packages
                OS: Linux
            Status: REPORTED
          Severity: crash
          Priority: NOR
         Component: IMAP resource
          Assignee: kdepim-bugs at kde.org
          Reporter: aldo-public at laposte.net
  Target Milestone: ---

Created attachment 118931
  --> https://bugs.kde.org/attachment.cgi?id=118931&action=edit
akonadi_imap_resource crash log

akonadi_imap_resource and akonadiserver crashe every couple of minutes. There
is nothing much to make it happen. It seems it happens only when synchronizing
my IMAP mailboxes, but I am not sure of this.

There is a load of associated bugs in my kmail/akonadi, which may or not be
related to these crashes:
- following one of the crashes, one of my IMAP accounts has mails in its root
folder (which is supposed to be unpopulated; of course I cannot delete these
mails).
- sometimes, after a crashe, the whole mailbox needs to be downloaded again
(this means a couple of gigabytes to download!)
- kmail status bar frequently reports errors (sorry I do not have examples now,
I will try to copy one and add it to this report as soon as I can)
- one of my IMAP accounts frequently loses its name and receives a generic name
instead (such as "Compte IMAP 6", sorry the locale is French).
- in kmail status bar, the agent filtering agent seems stuck forever at 0%
- synchronization seems to often restart several times for a given folder.
Sometimes the progress bar goes back a few %, then progresses again.
- synchronization of big folders is always very slow (although IMAP protocol
should allow for just downloading the delta, should it not?)
- when I mark a message as spam (which should move it to spam folder), the
message comes back at the next synchronization
- spam seems never to be filter out anyway (although the bogosity field is
correctly set up in every received message)

All in all, kmail has become almost unusable for me in the last weeks. 




SOFTWARE/OS VERSIONS
Linux/KDE Plasma: KDE neon 5.15
KDE Plasma Version: 5.15.3
KDE Frameworks Version: 5.56.0
Qt Version: 5.12.0

ADDITIONAL INFORMATION

My setup of kmail/akonadi consists in
- a local mail folder
- 3 IMAP accounts with local cache
- a couple of calendars and address books (probably unrelated to this bug)

Morover, the antispam (bogofilter) filters are set up.

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