https://bugs.kde.org/show_bug.cgi?id=447740
--- Comment #42 from Claus Prüfer <prue...@webcodex.de> ---
Yes, i know it is not easy to detect this kind of bug. I try to demystify it
since years, but still no clue.
What i did currently: i switched to XFCE window manager (X11) with QT
integration and disabled "all" plugins except "KDE File Manager Integration"
and "Python Support" ("kdevelop-python" Debian package also installed). Also
disabled Background Parser: problem gone. But: it crashed right after pressing
"apply" button after disabling the plugins (and no back-trace was shown).
I also switched to software rendering in one of my development virtual
machines: problem seems also to be resolved.
Someone also mentioned that it could be graphics related (opengl / driver?)
also a common Linux problem.
Additionally i realized that often when i am working with multiple open files
(in multiple splitted areas) that the background parsers (pointers) get puzzled
and on click the highlighted areas do not match with the program code anymore.
This also could be a null-pointer / de-referencing or similar problem.
I will try to update / compile a newer KDE / QT version and investigate
further.
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