gistfile1.rb

# How do I make this:
skip_authorization do |current_resource_owner, client|
  client.application.auto_grant?
end

# Work with this:
!!instance_exec(@server.current_resource_owner, @pre_auth.client) &Doorkeeper.configuration.skip_authorization

# in both 1.8 and 1.9, without failures like this: https://travis-ci.org/applicake/doorkeeper/builds/3540040

possibly the more informative error:
https://travis-ci.org/applicake/doorkeeper/jobs/3539947

when it looks like this:

!!instance_exec(@server.current_resource_owner, @pre_auth.client) &Doorkeeper.configuration.skip_authorization

er

!!instance_exec(@server.current_resource_owner, @pre_auth.client, &Doorkeeper.configuration.skip_authorization)

fixed it!

!!instance_exec([@server.current_resource_owner, @pre_auth.client], &Doorkeeper.configuration.skip_authorization)

for those curious