__FILE__ is set to the absolute path in Rails 5.2 when RAILS_ENV is set to production

console.txt

justinf@jakiro:/tmp/runner_problem
> DISABLE_SPRING=1 RAILS_ENV=production bin/rails runner runner_test.rb 
Rails version: 5.2.3
Rails env: production
$0: runner_test.rb
__FILE__: /tmp/runner_problem/runner_test.rb

==================================

> DISABLE_SPRING=1 bin/rails runner -e production runner_test.rb 
Rails version: 5.2.3
Rails env: production
$0: runner_test.rb
__FILE__: runner_test.rb

runner_test.rb

puts "Rails version: #{Rails.version}"
puts "Rails env: #{Rails.env}"
puts "$0: #{$0}"
puts "__FILE__: #{__FILE__}"