RDoc seems still supporting outdated 2.4. https://github.com/ruby/rdoc/runs/2565344070?check_suite_focus=true#step:5:64 ``` Error: test_remove_unparseable_CVE_2021_31799(TestRDocRDoc): NoMethodError: undefined method `children' for Dir:Class /home/runner/work/rdoc/rdoc/test/rdoc/test_rdoc_rdoc.rb:467:in `block in test_remove_unparseable_CVE_2021_31799' 464: end 465: 466: assert_equal file_list, @rdoc.remove_unparseable(file_list) => 467: assert_equal file_list, Dir.children('.') 468: end 469: end 470: ``` https://github.com/ruby/rdoc/commit/5a4a64dc0f
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