I too just started seeing this, and it's a problem since copy/pasting from other app which support a CTRL+SHIFT+V action is what's tripping me up. I understand the sentiment of "don't do that" but but typing any key combination that isn't bound shouldn't crash that app. It's interesting that this is somehow being spun as simply an upstream GTK issue. I'll attempt an intentional keybinding assignment to at least stop it from crashing on my and losing work.