fail loudly if no links for this version exist
fail loudly if no links for this version exist

1337807/rubygems.org,rubygems/rubygems.org-backup,rubygems/rubygems.org-backup,square/rubygems.org,square/rubygems.org,square/rubygems.org,rubygems/rubygems.org-backup,1337807/rubygems.org,1337807/rubygems.org