Nightly CI build for the Rails repo

Daily build with Ruby head

Failed in 32m 9s
:pipeline: rails-nightly-initial-pipeline
activerecord mysql2 (master) [prepared_statements]rake db:mysql:rebuild mysql2:test
Waited 8s
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Ran in 5m 1s
6/12
railties (master) [rack-3-0]rake test
Waited 6s
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Ran in 11m 46s
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railties (master) [rack-3-0]rake test
Waited 7s
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Ran in 3m 31s
Total Job Run Time: 10h 26m