> This must be due to a change in the RSS feed from openclipart: (…)
OpenCLipart seems to produce invalid feeds:
Bug #988844 “Feeds are no longer valid”
Inkscape of course should not crash even when the feed is invalid - this report is closely related or a duplicate of the earlier ones, like e.g.
Bug #889421 “Segfault in openclipart dialog when openclipart.org is down ”