rails/rails — pull request #16912 by yuki24 (2014-09-14 00:14:20+00:00)
Title: Rescue Rack::Utils::ParameterTypeError instead of TypeError

As of rack/rack@167b6480235ff00ed5f355698bf00ec2f250f72e, Rack raises `Rack::Utils::ParameterTypeError` which inherits `TypeError`. In terms of the behaviour, Rescuing `TypeError` still works but this method shouldn't rescue if `TypeError` is raised for other reasons.