severity 673433 important thanks Downgrading the VirtualBox 3d drivers fixes this. I filed a separate bug for that, #673437. I've left this one open because clutter-using programs shouldn't segfault if clutter can't get a Visual, they should just output an error message.
-- Sam Morris <https://robots.org.uk/> 3412 EA18 1277 354B 991B C869 B219 7FDB 5EA0 1078
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