Rescue parse error from CommitCommentEvent

~/local/bin/ruby ~/local/src/emoticommits/bin/record_activity.rb ~/var/events.sqlite ~/var/locations.sqlite 90
~/local/src/emoticommits/lib/githubarchive.rb:84:in `parse': undefined method `[]' for nil:NilClass (NoMethodError)
        from ~/local/src/emoticommits/bin/record_activity.rb:152:in `block in <main>'
        from ~/local/lib/ruby/gems/2.0.0/gems/yajl-ruby-1.1.0/lib/yajl.rb:36:in `call'
        from ~/local/lib/ruby/gems/2.0.0/gems/yajl-ruby-1.1.0/lib/yajl.rb:36:in `parse'
        from ~/local/lib/ruby/gems/2.0.0/gems/yajl-ruby-1.1.0/lib/yajl.rb:36:in `parse'
        from ~/local/src/emoticommits/bin/record_activity.rb:150:in `<main>'