[Bug 295795] Kontact (Kmail) crashes when typing in subject or body field of a new mail

[Sven Eden]

https://bugs.kde.org/show_bug.cgi?id=295795

--- Comment #4 from Sven Eden <sven.eden at gmx.de> ---
Created attachment 69804
  --> https://bugs.kde.org/attachment.cgi?id=69804&action=edit
New crash information added by DrKonqi

kontact (4.8.0) on KDE Platform 4.8.1 (4.8.1) using Qt 4.8.0

- What I was doing when the application crashed:

Opened kontact, started to write a new e-mail.
The crash happens when I am either writing into the subject or the text field.

- Custom settings:
I just changed my language settings from "German" to "American English" in KDE
Systemsettings to track down a different issue the german error text yields no
hits in common web search engines. Therefore my country setting is "Germany",
Preferred Languages has "American English" first.

Before I made this change kontact never crashed.

- Test 1:
I have pushed "German" back up to first place. Kontact now starts in german and
I can finish my e-mail. Everything is fine again.

- Test 2:
I have pushed "American English" up to first place and this time changed the
country settings to "USA". Kontact now starts in english, I start a new mail,
enter recipient and subject, hit tab (or click into the message box, it doesn't
matter) and get the same crash again.

- Test 3:
This time I removed "German" from the preferred languages side and added
"British English" as second. Kontact starts, I can write and send e-mail,
everything is fine.

- Test 4:
After removing "British English" from the Preferred Languages, the crash is
back.

- Test 5:
After swapping American and British English, the crash is still there.

----------

It seems there is a problem when eitehr British or American english is alone
without the other chosen as the preferred language in
Systemsettings->Country/Region&Language

-- Backtrace (Reduced):
#6  0x00007f0bd45b64d3 in eventFilter (e=0x7fff87e3aa60, o=0x145f3b0,
this=0x12d9820) at
/home/portage/kde-base/kdelibs-4.8.1-r1/work/kdelibs-4.8.1/kdeui/sonnet/highlighter.cpp:355
#7  Sonnet::Highlighter::eventFilter (this=0x12d9820, o=0x145f3b0,
e=0x7fff87e3aa60) at
/home/portage/kde-base/kdelibs-4.8.1-r1/work/kdelibs-4.8.1/kdeui/sonnet/highlighter.cpp:337
#8  0x00007f0bd3ab72b8 in
QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<optimized out>,
receiver=0x145f3b0, event=0x7fff87e3aa60) at kernel/qcoreapplication.cpp:986
#9  0x00007f0bd2e58e3f in notify_helper (e=0x7fff87e3aa60, receiver=0x145f3b0,
this=0xb597a0) at kernel/qapplication.cpp:4546
#10 QApplicationPrivate::notify_helper (this=0xb597a0, receiver=0x145f3b0,
e=0x7fff87e3aa60) at kernel/qapplication.cpp:4522

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