Nightly CI build for the Rails repo

Daily build with Ruby head

Failed in 6m 43s
:pipeline: rails-nightly-initial-pipeline
:docker: rubylang/ruby:master
Waited 6s
·
Ran in 6m 8s
:docker: rubylang/ruby:master-debug
Waited 1s
·
Ran in 5m 23s
Total Job Run Time: 11m 59s