Add rdoc as an explicit dependency for Ruby 4.0 compatibility#619
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kateinoigakukun merged 1 commit intoruby:mainfrom Jan 4, 2026
Merged
Add rdoc as an explicit dependency for Ruby 4.0 compatibility#619kateinoigakukun merged 1 commit intoruby:mainfrom
kateinoigakukun merged 1 commit intoruby:mainfrom
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Ruby 4.0 no longer ships rdoc as a default gem, so `require "rdoc/task"` fails under `bundle exec` unless rdoc is listed in the Gemfile.
kateinoigakukun
approved these changes
Jan 4, 2026
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This issue occurs specifically on Ruby 4.0.
Ruby 4.0 no longer ships rdoc as a default gem, so
require "rdoc/task"fails underbundle execunless rdoc is explicitly listed in the Gemfile.Running
bundle exec rake compileresults in the following error:This change adds rdoc as an explicit dependency to restore compatibility with Ruby 4.0 and ensure reproducible builds.