[rubygems/rubygems] Check for correct exception on older psych versions
https://github.com/rubygems/rubygems/commit/52de6eccf5
[rubygems/rubygems] Check for correct exception on older psych versions
https://github.com/rubygems/rubygems/commit/52de6eccf5