rails/rails — pull request #7654 by steveklabnik (2012-09-15 12:37:12+00:00)
Title: Improve Process::Status#to_json

Because Process::Status has no instance_variables, the
ActiveSupport version of #to_json produces {}, which isn't good.

Therefore, we implement our own #as_json, which makes it useful
again.

Fixes #4857