Can you start your computer in the "rescue" mode? (Press Esc at boot to
get to the boot menu (grub) and select 'rescue').
Once you are in a root shell, do you still get the crash if you try e.
g. "sudo id"? If so, can you please run
gdb --ex run --ex 'bt full' --batch --args sudo id
and write down/take a photo of the resulting stack trace output? You can
also do
gdb --ex run --ex 'bt full' --batch --args sudo id > /sudo-debug.txt
2>&1
so that the output will be written into the file /sudo-debug.txt. If you
can still boot your machine normally (under KDE, you said?) you can
attach this file to this bug report.
Thank you!
** Changed in: sudo (Ubuntu)
Status: New => Incomplete
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sudo = segfault (error 6)
https://bugs.launchpad.net/bugs/220483
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