https://bugs.kde.org/show_bug.cgi?id=356843

--- Comment #13 from Thomas Lübking <thomas.luebk...@gmail.com> ---
(In reply to Piotr Mierzwinski from comment #11)
> Probably because kernel what I use (4.3.2) has not set parameter:
> CONFIG_SECURITY_YAMA. I suppose like that because I get error "no such file"
> when I try to check this file.

Yes, it's just meanwhile usually enabled and you cannot attach to random
process when it's set.

Just attach to the running process:
    gdb --pid 123456 2>&1 | tee plasmashell.gdb # proper pid please ;-)
then
    continue

then cause the crash, gdb should not the segfault, then finally run (in gdb)
   thread apply all bt

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