Nightly CI build for the Rails repo

Daily build with Ruby head

Failed in 31m 13s
:pipeline: rails-nightly-initial-pipeline
activerecord mysql2 (master) [prepared_statements]rake db:mysql:rebuild mysql2:test
Waited 5s
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Ran in 4m 5s
6/12
railties (master) [rack-3-0]rake test
Waited 7s
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Ran in 12m 3s
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railties (master) [rack-3-0]rake test
Waited 3s
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Ran in 3m 22s
Total Job Run Time: 10h 54m