{
  "id": "P277",
  "slug": "ruby-3-4-mutex-m-bundled-library-removed-default-gem-transitive-library-crashes-initialization",
  "status": "search-observed",
  "product": "Ruby 3.4",
  "family": "Runtime bundled-library drift",
  "canonical_url": "https://gitdocs.org/fix/ruby-3-4-mutex-m-bundled-library-removed-default-gem-transitive-library-crashes-initialization",
  "query_alias_url": "https://gitdocs.org/q/ruby-3-4-mutex-m-bundled-library-removed-default-gem-transitive-library-crashes-initialization",
  "markdown_url": "https://gitdocs.org/fix/ruby-3-4-mutex-m-bundled-library-removed-default-gem-transitive-library-crashes-initialization.md",
  "json_url": "https://gitdocs.org/api/fixes/ruby-3-4-mutex-m-bundled-library-removed-default-gem-transitive-library-crashes-initialization.json",
  "canonical_query": "Ruby 3.4 mutex_m bundled library removed default gem transitive library crashes initialization",
  "observed_codex_queries": [
    "Ruby 3.4 mutex_m bundled library removed default gem transitive library crashes initialization",
    "Ruby 3.4 mutex_m gem bundled gems changelog",
    "Ruby 3.4 NEWS bundled gems mutex_m",
    "Ruby 3.4.0 Released default gems bundled gems logger mutex_m drb",
    "\"mutex_m\" \"Ruby 3.4\" \"LoadError\"",
    "\"mutex_m\" \"Gemfile\" \"Ruby 3.4\"",
    "https://stdgems.org/3.4.0/",
    "'mutex_m' in https://stdgems.org/3.4.0/",
    "https://docs.ruby-lang.org/en/3.4/NEWS_md.html",
    "'mutex_m' in https://docs.ruby-lang.org/en/3.4/NEWS_md.html",
    "drb 2.2.1 gemspec mutex_m dependency",
    "https://rubygems.org/gems/drb/versions/2.2.1",
    "https://rubygems.org/api/v2/rubygems/drb/versions/2.2.1.json",
    "rubygems api drb 2.2.1 dependencies mutex_m",
    "https://raw.githubusercontent.com/ruby/drb/master/drb.gemspec",
    "https://raw.githubusercontent.com/ruby/drb/v2.2.1/lib/drb/drb.rb",
    "\"require 'mutex_m'\" \"ruby/drb\" \"drb.rb\"",
    "https://github.com/ruby/drb/blob/v2.2.1/lib/drb/drb.rb"
  ],
  "organic_dependency_search_count": 18,
  "affected_versions": "",
  "exact_errors": [],
  "diagnosis": "A library was historically part of the default runtime install but is now only bundled/optional, so project dependency files may not mention it.",
  "before": "",
  "after": "",
  "verification": "Verifier checks an explicit dependency or supported replacement and a clean install.",
  "unsafe_fixes": [
    "Changing local code without checking the current external contract.",
    "Retrying the same install, build, or API call with no version/source change.",
    "Applying a broad unsafe bypass when a narrow compatibility fix is available."
  ],
  "last_verified_at": "2026-06-25",
  "neutral_validation": {
    "organic_search_observed": true,
    "organic_strict_pass": true,
    "no_web_counterfactual_run": false,
    "no_web_strict_pass": null,
    "search_necessity_under_fixture": null,
    "no_web_oracle_note": "Observed query evidence is separated from necessity proof; no-web and stale-contract counterfactuals should be tracked separately."
  },
  "source_trail": [
    {
      "url": "https://www.ruby-lang.org/en/news/2024/12/25/ruby-3-4-0-released/",
      "label": "Ruby 3.4 release"
    },
    {
      "url": "https://stdgems.org/3.4.0/",
      "label": "Official reference opened by Codex"
    },
    {
      "url": "https://docs.ruby-lang.org/en/3.4/NEWS_md.html",
      "label": "Official reference opened by Codex"
    },
    {
      "url": "https://rubygems.org/gems/drb/versions/2.2.1",
      "label": "Official reference opened by Codex"
    },
    {
      "url": "https://rubygems.org/api/v2/rubygems/drb/versions/2.2.1.json",
      "label": "Official reference opened by Codex"
    },
    {
      "url": "https://raw.githubusercontent.com/ruby/drb/master/drb.gemspec",
      "label": "Official reference opened by Codex"
    },
    {
      "url": "https://raw.githubusercontent.com/ruby/drb/v2.2.1/lib/drb/drb.rb",
      "label": "Official reference opened by Codex"
    },
    {
      "url": "https://github.com/ruby/drb/blob/v2.2.1/lib/drb/drb.rb",
      "label": "GitHub source file or repository reference"
    }
  ],
  "source_github_links": [
    {
      "url": "https://raw.githubusercontent.com/ruby/drb/master/drb.gemspec",
      "label": "Official reference opened by Codex"
    },
    {
      "url": "https://raw.githubusercontent.com/ruby/drb/v2.2.1/lib/drb/drb.rb",
      "label": "Official reference opened by Codex"
    },
    {
      "url": "https://github.com/ruby/drb/blob/v2.2.1/lib/drb/drb.rb",
      "label": "GitHub source file or repository reference"
    }
  ]
}