Can you get a backtrace with libgtk2.0-0-dbg and libglib2.0-0-dbg
installed (maybe even gedit-dbgsym from
http://wiki.ubuntu.com/DebuggingProgramCrash)?
** Changed in: gedit (Ubuntu)
Status: Confirmed => Needs Info
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gedit crashes when choosing "add line numbers"
https://launchpad.net/bugs/79280