Thanks for your bug report. The crash looks like a memory corruption.
Could you try to get a valgrind log for it (you can follow the
instructions from https://wiki.ubuntu.com/Valgrind for that)?
** Changed in: xchat-gnome (Ubuntu)
Importance: Undecided => Medium
Status: Unconfirmed => Needs Info
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Crashed on Exit
https://launchpad.net/bugs/97590