At some point since Fedora-Rawhide-20171106.n.0 - the last time this worked - a bug has appeared in GNOME which prevents the 'welcome tour' showing up on first boot / first login, as it should. Instead, yelp crashes. I'll attach the best traceback I've been able to get (Fedora doesn't seem to be able to find *all* the relevant debuginfo packages).

The crash can easily be reproduced on an affected install by simply running `/usr/libexec/gnome-welcome-tour` or just `yelp help:gnome-help/getting-started`. To reproduce, just boot a recent Fedora Rawhide Workstation live image - e.g. https://kojipkgs.fedoraproject.org/compose/rawhide/Fedora-Rawhide-20171124.n.0/compose/Workstation/x86_64/iso/Fedora-Workstation-Live-x86_64-Rawhide-20171124.n.0.iso - install it (actually, it may be possible to reproduce from the live environment), reboot, and on first login, note you get a crash notification instead of the 'welcome tour'. Then use either of the above commands to reproduce at will.

I can't pinpoint *precisely* when this appeared, as there were some Rawhide bugs in the relevant time period which broke install entirely for a short time. But it was between Fedora-Rawhide-20171106.n.0 (which worked) and Fedora-Rawhide-20171114.n.0 (which ran into this issue). The composes between those two all hit other failures before they would have run into this issue.