Pin i18n < 1.15 on Ruby < 3.2 to keep CI deterministic#620
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The pre-3.2 CI matrix uses the default Gemfile, and Gemfile.lock is gitignored, so bundler resolves the latest i18n fresh on every run. i18n 1.15.0 started calling Fiber storage (`Fiber.[]`, Ruby 3.2+), so on Ruby <= 3.1 ActiveSupport failed to load with `NoMethodError: undefined method '[]' for Fiber:Class`, breaking `test (3.1)` (and any pre-3.2 lane that happened to resolve it). Upstream fixed this in i18n 1.15.2, but the gitignored-lock + unpinned-dep setup leaves the EOL-track Rubies exposed to the next such release. Pin them to the stable 1.14 line for a deterministic build; Ruby 3.2+ continues to use the latest i18n. Verified in a ruby:3.1 container: with the cap, i18n resolves to 1.14.8 and `require "active_support/core_ext/string/inflections"` (the exact require that failed in CI) loads cleanly. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Spg5MGVB1XXoxJh6LnmgRu
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not reliably able to recreate in CI actually. closing |
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The failure
test (3.1)errors duringtest_helperload:Root cause
The pre-3.2 CI lanes use the default
Gemfile, andGemfile.lockis gitignored — so bundler resolves the latesti18nfresh on every run. i18n 1.15.0 began calling Fiber storage (Fiber.[]), which only exists on Ruby 3.2+, so on Ruby ≤ 3.1 ActiveSupport fails to load it. (master's last green run predates 1.15.0; it would hit this on a re-run too.)Upstream fixed it in i18n 1.15.2, but the gitignored-lock + unpinned-transitive-dep setup leaves the EOL-track Rubies exposed to the next such release. This caps
i18n < 1.15only on Ruby < 3.2, keeping those lanes on the stable 1.14 line for a deterministic build. Ruby 3.2+ is untouched and continues to use the latesti18n.Verification (Docker,
ruby:3.1)require "active_support/core_ext/string/inflections"NoMethodError … Fiber:Classactivesupport7.2 requiresi18n >= 1.6, < 2, so 1.14.8 satisfies it cleanly.Note / follow-up
The deeper fragility is that the EOL-Ruby matrix resolves bleeding-edge transitive deps from an uncommitted lock, so this class of breakage will recur with other gems. Committing per-lane lockfiles (or pinning) would make CI fully reproducible — out of scope here, happy to do it separately if wanted.
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