[kmail2] [Bug 449898] New: "setFcc: collection invalid" after clicking on mail address in e-mail message body

[sedrubal]

https://bugs.kde.org/show_bug.cgi?id=449898

            Bug ID: 449898
           Summary: "setFcc: collection invalid" after clicking on mail
                    address in e-mail message body
           Product: kmail2
           Version: 5.19.2
          Platform: Archlinux Packages
                OS: Linux
            Status: REPORTED
          Severity: critical
          Priority: NOR
         Component: general
          Assignee: kdepim-bugs at kde.org
          Reporter: kde at sedrubal.de
  Target Milestone: ---

SUMMARY

kmail crashes when I click on a mail address in the body of an email.
Unfortunately it seems, that some data gets corrupt during the crash and I am
not able to start kmail again. I manually deleted some kmail / akonadi related
files without success. But I could create a backup using PIM Data Exporter.
After deleting everything I found in ~/.local/share and ~/.config/ and restored
the backup, it worked again.

STEPS TO REPRODUCE
1. Open a mail with an email address in the message body
2. click on the email address

OBSERVED RESULT
kmail freezes / crashes. When I close it, it does not start again. Instead it
is crashing with the message

EXPECTED RESULT
I want to write a new email to the address, I clicked on.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux
KDE Plasma Version: 5.24
KDE Frameworks Version: 5.90.0 
Qt Version: 5.15.2

ADDITIONAL INFORMATION

This is the log when I try to start kmail:
$ kmail
Connection to speech-dispatcher failed
Connection to speech-dispatcher failed
Connection to speech-dispatcher failed
Connection to speech-dispatcher failed
Connection to speech-dispatcher failed
Connection to speech-dispatcher failed
Connection to speech-dispatcher failed
Connection to speech-dispatcher failed
Connection to speech-dispatcher failed
Connection to speech-dispatcher failed
Connection to speech-dispatcher failed
Connection to speech-dispatcher failed
Connection to speech-dispatcher failed
Connection to speech-dispatcher failed
Connection to speech-dispatcher failed
Connection to speech-dispatcher failed
Connection to speech-dispatcher failed
org.kde.pim.kmail: setFcc: collection invalid  ""
*** KMail got signal 11 (Exiting)
*** Dead letters dumped.
19 -- exe=/usr/bin/kmail
13 -- platform=xcb
11 -- display=:1
14 -- appname=kmail
17 -- apppath=/usr/bin
10 -- signal=11
11 -- pid=183353
28 -- appversion=5.19.2 (21.12.2)
18 -- programname=KMail
31 -- bugaddress=submit at bugs.kde.org
12 -- startupid=0

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