[kmail2] [Bug 378646] New: Email corrupts folders, unable to remove

[Richard Johnson]

https://bugs.kde.org/show_bug.cgi?id=378646

            Bug ID: 378646
           Summary: Email corrupts folders, unable to remove
           Product: kmail2
           Version: 5.2.3
          Platform: Other
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: commands and actions
          Assignee: kdepim-bugs at kde.org
          Reporter: richard at ytivarg.com
  Target Milestone: ---

A few incoming mails, when opened, cause kmail to go to the "loading file"
screen, and it simply remains there for however long I leave it.  At that
point, no other email can be selected.  It is necessary to close the kmail
client and then go to a shell and kill a number (usually about six) spawned
kmail processes.  

At this point the client can be restarted and runs more or less normally. If I
land on the errant mail, even the attempt to preview will lock up the client. 
Hence I can't delete it and I can't actually select it to send it in. 
Fortunately this is not the inbox--filters move it just fine.  If I select the
entire folder, no operation (other than opening it and locking the client) is
possible.  It does not sort, does not clean, and does not export.

These messages seem to be related to passing information back and forth with
the system browser.  They are invariably confirmation messages for a web course
I'm taking."

Will accept instructions for how to extract the mail or folder, or how to get
into the database, or whatever, if it helps.

This is on kubuntu 16.10

Here's the info from the client:

KDE Frameworks 5.26.0
Qt 5.6.1 (built against 5.6.1)
The xcb windowing system

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