It can’t. My hunch would be that Tk has a bug in dealing with X11, and something which gtk2 does is triggering it. You should probably post this on a Tk developers mailing list somewhere.

Makeshifts last the longest.

In reply to Re: Gtk2 apps are seg-faulting my Tk apps by Aristotle
in thread Gtk2 apps are seg-faulting my Tk apps by zentara

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