Nightly CI build for the Rails repo

Daily build with Ruby head

Failed in 22m 35s
:pipeline: rails-nightly-initial-pipeline
actionpack (master) [rack-head]rake test
Waited 3s
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Ran in 1m 37s
guides (master)rake test
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Ran in 3m 46s
guides (yjit)rake test
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Ran in 3m 42s
guides (master-debug)rake test
Waited 1m 28s
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Ran in 7m 1s
Total Job Run Time: 9h 48m