NoMethodError: undefined method `ip_address' for an instance of Socket

[matchu]

After running bundle update in my Rails app that's using Falcon, my development app no longer serves requests, and instead returns a page that says the following:

NoMethodError: undefined method `ip_address' for an instance of Socket

It also logs the following:

12:56:46 web.1  | {"time":"2025-01-12T12:56:46-08:00","severity":"error","oid":14840,"pid":106581,"subject":"Protocol::Rack::Adapter::Rack31","annotation":"Reading HTTP/1.1 requests for Async::HTTP::Protocol::HTTP1::Server.","event":{"type":"failure","root":"/home/matchu/Fun/impress","class":"NoMethodError","message":"\u001b[1mundefined method `ip_address' for an instance of Socket (\u001b[1;4mNoMethodError\u001b[m\u001b[1m)\u001b[m\n\n\u001b[1m\t\t\t\t\t\tenv[CGI::REMOTE_ADDR] = peer.ip_address\u001b[m\n\u001b[1m\t\t\t\t\t\t                            ^^^^^^^^^^^\u001b[m","backtrace":["/home/matchu/.rbenv/versions/3.3.6/lib/ruby/gems/3.3.0/gems/protocol-rack-0.11.1/lib/protocol/rack/adapter/generic.rb:107:in `unwrap_request'","/home/matchu/.rbenv/versions/3.3.6/lib/ruby/gems/3.3.0/gems/protocol-rack-0.11.1/lib/protocol/rack/adapter/rack31.rb:60:in `make_environment'","/home/matchu/.rbenv/versions/3.3.6/lib/ruby/gems/3.3.0/gems/protocol-rack-0.11.1/lib/protocol/rack/adapter/generic.rb:121:in `call'","/home/matchu/.rbenv/versions/3.3.6/lib/ruby/gems/3.3.0/gems/protocol-http-0.43.0/lib/protocol/http/middleware.rb:43:in `call'","/home/matchu/.rbenv/versions/3.3.6/lib/ruby/gems/3.3.0/gems/async-http-0.75.0/lib/async/http/server.rb:61:in `block in accept'","/home/matchu/.rbenv/versions/3.3.6/lib/ruby/gems/3.3.0/gems/async-http-0.75.0/lib/async/http/protocol/http1/server.rb:49:in `each'","/home/matchu/.rbenv/versions/3.3.6/lib/ruby/gems/3.3.0/gems/async-http-0.75.0/lib/async/http/server.rb:50:in `accept'","/home/matchu/.rbenv/versions/3.3.6/lib/ruby/gems/3.3.0/gems/io-endpoint-0.13.1/lib/io/endpoint/wrapper.rb:182:in `block (2 levels) in accept'","/home/matchu/.rbenv/versions/3.3.6/lib/ruby/gems/3.3.0/gems/async-2.17.0/lib/async/task.rb:197:in `block in run'","/home/matchu/.rbenv/versions/3.3.6/lib/ruby/gems/3.3.0/gems/async-2.17.0/lib/async/task.rb:422:in `block in schedule'"]}}

I think this is a bug in protocol-rack in particular, because that's where the traceback points, and upgrading everything but protocol-rack does not produce this error.

To work around this, I've held my app back from version 0.11.0 of protocol-rack, by adding this to my Gemfile:

gem 'protocol-rack', '~> 0.10.0', '< 0.11.0'

I hope this helps, thank you for your work!

---

Here's my full Gemfile.lock (after bundle update, but before the workaround):

GIT
  remote: https://github.com/rubyamf/rocketamf.git
  revision: 796f591d002b5cf47df436dbcbd6f2ab00e869ed
  specs:
    RocketAMF (1.0.0)

GEM
  remote: https://rubygems.org/
  specs:
    actioncable (8.0.1)
      actionpack (= 8.0.1)
      activesupport (= 8.0.1)
      nio4r (~> 2.0)
      websocket-driver (>= 0.6.1)
      zeitwerk (~> 2.6)
    actionmailbox (8.0.1)
      actionpack (= 8.0.1)
      activejob (= 8.0.1)
      activerecord (= 8.0.1)
      activestorage (= 8.0.1)
      activesupport (= 8.0.1)
      mail (>= 2.8.0)
    actionmailer (8.0.1)
      actionpack (= 8.0.1)
      actionview (= 8.0.1)
      activejob (= 8.0.1)
      activesupport (= 8.0.1)
      mail (>= 2.8.0)
      rails-dom-testing (~> 2.2)
    actionpack (8.0.1)
      actionview (= 8.0.1)
      activesupport (= 8.0.1)
      nokogiri (>= 1.8.5)
      rack (>= 2.2.4)
      rack-session (>= 1.0.1)
      rack-test (>= 0.6.3)
      rails-dom-testing (~> 2.2)
      rails-html-sanitizer (~> 1.6)
      useragent (~> 0.16)
    actiontext (8.0.1)
      actionpack (= 8.0.1)
      activerecord (= 8.0.1)
      activestorage (= 8.0.1)
      activesupport (= 8.0.1)
      globalid (>= 0.6.0)
      nokogiri (>= 1.8.5)
    actionview (8.0.1)
      activesupport (= 8.0.1)
      builder (~> 3.1)
      erubi (~> 1.11)
      rails-dom-testing (~> 2.2)
      rails-html-sanitizer (~> 1.6)
    activejob (8.0.1)
      activesupport (= 8.0.1)
      globalid (>= 0.3.6)
    activemodel (8.0.1)
      activesupport (= 8.0.1)
    activerecord (8.0.1)
      activemodel (= 8.0.1)
      activesupport (= 8.0.1)
      timeout (>= 0.4.0)
    activestorage (8.0.1)
      actionpack (= 8.0.1)
      activejob (= 8.0.1)
      activerecord (= 8.0.1)
      activesupport (= 8.0.1)
      marcel (~> 1.0)
    activesupport (8.0.1)
      base64
      benchmark (>= 0.3)
      bigdecimal
      concurrent-ruby (~> 1.0, >= 1.3.1)
      connection_pool (>= 2.2.5)
      drb
      i18n (>= 1.6, < 2)
      logger (>= 1.4.2)
      minitest (>= 5.1)
      securerandom (>= 0.3)
      tzinfo (~> 2.0, >= 2.0.5)
      uri (>= 0.13.1)
    addressable (2.8.7)
      public_suffix (>= 2.0.2, < 7.0)
    aes_key_wrap (1.1.0)
    ast (2.4.2)
    async (2.21.1)
      console (~> 1.29)
      fiber-annotation
      io-event (~> 1.6, >= 1.6.5)
    async-container (0.18.3)
      async (~> 2.10)
    async-http (0.75.0)
      async (>= 2.10.2)
      async-pool (~> 0.7)
      io-endpoint (~> 0.11)
      io-stream (~> 0.4)
      protocol-http (~> 0.30)
      protocol-http1 (~> 0.20)
      protocol-http2 (~> 0.18)
      traces (>= 0.10)
    async-http-cache (0.4.4)
      async-http (~> 0.56)
    async-pool (0.10.2)
      async (>= 1.25)
      traces
    async-service (0.12.0)
      async
      async-container (~> 0.16)
    attr_required (1.0.2)
    babel-source (5.8.35)
    babel-transpiler (0.7.0)
      babel-source (>= 4.0, < 6)
      execjs (~> 2.0)
    backport (1.2.0)
    base64 (0.2.0)
    bcrypt (3.1.20)
    benchmark (0.4.0)
    bigdecimal (3.1.9)
    bindata (2.5.0)
    bindex (0.8.1)
    bootsnap (1.18.4)
      msgpack (~> 1.2)
    builder (3.3.0)
    childprocess (5.1.0)
      logger (~> 1.5)
    concurrent-ruby (1.3.4)
    connection_pool (2.5.0)
    console (1.29.2)
      fiber-annotation
      fiber-local (~> 1.1)
      json
    crack (1.0.0)
      bigdecimal
      rexml
    crass (1.0.6)
    csv (3.3.2)
    date (3.4.1)
    debug (1.9.2)
      irb (~> 1.10)
      reline (>= 0.3.8)
    devise (4.9.4)
      bcrypt (~> 3.0)
      orm_adapter (~> 0.1)
      railties (>= 4.1.0)
      responders
      warden (~> 1.2.3)
    devise-encryptable (0.2.0)
      devise (>= 2.1.0)
    diff-lcs (1.5.1)
    dotenv (2.8.1)
    dotenv-rails (2.8.1)
      dotenv (= 2.8.1)
      railties (>= 3.2)
    drb (2.2.1)
    e2mmap (0.1.0)
    email_validator (2.2.4)
      activemodel
    erubi (1.13.1)
    execjs (2.10.0)
    falcon (0.48.4)
      async
      async-container (~> 0.18)
      async-http (~> 0.75)
      async-http-cache (~> 0.4)
      async-service (~> 0.10)
      bundler
      localhost (~> 1.1)
      openssl (~> 3.0)
      process-metrics (~> 0.2)
      protocol-http (~> 0.31)
      protocol-rack (~> 0.7)
      samovar (~> 2.3)
    faraday (2.12.2)
      faraday-net_http (>= 2.0, < 3.5)
      json
      logger
    faraday-follow_redirects (0.3.0)
      faraday (>= 1, < 3)
    faraday-net_http (3.4.0)
      net-http (>= 0.5.0)
    ffi (1.17.1)
    fiber-annotation (0.2.0)
    fiber-local (1.1.0)
      fiber-storage
    fiber-storage (1.0.0)
    globalid (1.2.1)
      activesupport (>= 6.1)
    haml (6.3.0)
      temple (>= 0.8.2)
      thor
      tilt
    hashdiff (1.1.2)
    hashie (5.0.0)
    http_accept_language (2.1.1)
    httparty (0.22.0)
      csv
      mini_mime (>= 1.0.0)
      multi_xml (>= 0.5.2)
    i18n (1.14.6)
      concurrent-ruby (~> 1.0)
    io-console (0.8.0)
    io-endpoint (0.14.0)
    io-event (1.7.5)
    io-stream (0.6.1)
    irb (1.14.3)
      rdoc (>= 4.0.0)
      reline (>= 0.4.2)
    jaro_winkler (1.6.0)
    jsbundling-rails (1.3.1)
      railties (>= 6.0.0)
    json (2.9.1)
    json-jwt (1.16.7)
      activesupport (>= 4.2)
      aes_key_wrap
      base64
      bindata
      faraday (~> 2.0)
      faraday-follow_redirects
    kramdown (2.5.1)
      rexml (>= 3.3.9)
    kramdown-parser-gfm (1.1.0)
      kramdown (~> 2.0)
    language_server-protocol (3.17.0.3)
    launchy (3.0.1)
      addressable (~> 2.8)
      childprocess (~> 5.0)
    letter_opener (1.10.0)
      launchy (>= 2.2, < 4)
    localhost (1.3.1)
    logger (1.6.5)
    loofah (2.24.0)
      crass (~> 1.0.2)
      nokogiri (>= 1.12.0)
    mail (2.8.1)
      mini_mime (>= 0.1.1)
      net-imap
      net-pop
      net-smtp
    mapping (1.1.1)
    marcel (1.0.4)
    memory_profiler (1.1.0)
    mini_mime (1.1.5)
    mini_portile2 (2.8.8)
    minitest (5.25.4)
    msgpack (1.7.5)
    multi_xml (0.7.1)
      bigdecimal (~> 3.1)
    mysql2 (0.5.6)
    net-http (0.6.0)
      uri
    net-imap (0.5.5)
      date
      net-protocol
    net-pop (0.1.2)
      net-protocol
    net-protocol (0.2.2)
      timeout
    net-smtp (0.5.0)
      net-protocol
    nio4r (2.7.4)
    nokogiri (1.18.1)
      mini_portile2 (~> 2.8.2)
      racc (~> 1.4)
    omniauth (2.1.2)
      hashie (>= 3.4.6)
      rack (>= 2.2.3)
      rack-protection
    omniauth-rails_csrf_protection (1.0.2)
      actionpack (>= 4.2)
      omniauth (~> 2.0)
    omniauth_openid_connect (0.7.1)
      omniauth (>= 1.9, < 3)
      openid_connect (~> 2.2)
    openid_connect (2.3.1)
      activemodel
      attr_required (>= 1.0.0)
      email_validator
      faraday (~> 2.0)
      faraday-follow_redirects
      json-jwt (>= 1.16)
      mail
      rack-oauth2 (~> 2.2)
      swd (~> 2.0)
      tzinfo
      validate_url
      webfinger (~> 2.0)
    openssl (3.3.0)
    orm_adapter (0.5.0)
    parallel (1.26.3)
    parser (3.3.6.0)
      ast (~> 2.4.1)
      racc
    process-metrics (0.3.0)
      console (~> 1.8)
      json (~> 2)
      samovar (~> 2.1)
    protocol-hpack (1.5.1)
    protocol-http (0.47.1)
    protocol-http1 (0.28.1)
      protocol-http (~> 0.22)
    protocol-http2 (0.22.0)
      protocol-hpack (~> 1.4)
      protocol-http (~> 0.18)
    protocol-rack (0.11.1)
      protocol-http (~> 0.43)
      rack (>= 1.0)
    psych (5.2.2)
      date
      stringio
    public_suffix (6.0.1)
    racc (1.8.1)
    rack (3.1.8)
    rack-attack (6.7.0)
      rack (>= 1.0, < 4)
    rack-mini-profiler (3.3.1)
      rack (>= 1.2.0)
    rack-oauth2 (2.2.1)
      activesupport
      attr_required
      faraday (~> 2.0)
      faraday-follow_redirects
      json-jwt (>= 1.11.0)
      rack (>= 2.1.0)
    rack-protection (4.1.1)
      base64 (>= 0.1.0)
      logger (>= 1.6.0)
      rack (>= 3.0.0, < 4)
    rack-session (2.1.0)
      base64 (>= 0.1.0)
      rack (>= 3.0.0)
    rack-test (2.2.0)
      rack (>= 1.3)
    rackup (2.2.1)
      rack (>= 3)
    rails (8.0.1)
      actioncable (= 8.0.1)
      actionmailbox (= 8.0.1)
      actionmailer (= 8.0.1)
      actionpack (= 8.0.1)
      actiontext (= 8.0.1)
      actionview (= 8.0.1)
      activejob (= 8.0.1)
      activemodel (= 8.0.1)
      activerecord (= 8.0.1)
      activestorage (= 8.0.1)
      activesupport (= 8.0.1)
      bundler (>= 1.15.0)
      railties (= 8.0.1)
    rails-dom-testing (2.2.0)
      activesupport (>= 5.0.0)
      minitest
      nokogiri (>= 1.6)
    rails-html-sanitizer (1.6.2)
      loofah (~> 2.21)
      nokogiri (>= 1.15.7, != 1.16.7, != 1.16.6, != 1.16.5, != 1.16.4, != 1.16.3, != 1.16.2, != 1.16.1, != 1.16.0.rc1, != 1.16.0)
    rails-i18n (8.0.1)
      i18n (>= 0.7, < 2)
      railties (>= 8.0.0, < 9)
    railties (8.0.1)
      actionpack (= 8.0.1)
      activesupport (= 8.0.1)
      irb (~> 1.13)
      rackup (>= 1.0.0)
      rake (>= 12.2)
      thor (~> 1.0, >= 1.2.2)
      zeitwerk (~> 2.6)
    rainbow (3.1.1)
    rake (13.2.1)
    rbs (2.8.4)
    rdiscount (2.2.7.3)
    rdoc (6.10.0)
      psych (>= 4.0.0)
    react-rails (2.7.1)
      babel-transpiler (>= 0.7.0)
      connection_pool
      execjs
      railties (>= 3.2)
      tilt
    regexp_parser (2.10.0)
    reline (0.6.0)
      io-console (~> 0.5)
    responders (3.1.1)
      actionpack (>= 5.2)
      railties (>= 5.2)
    reverse_markdown (2.1.1)
      nokogiri
    rexml (3.4.0)
    rspec-core (3.13.2)
      rspec-support (~> 3.13.0)
    rspec-expectations (3.13.3)
      diff-lcs (>= 1.2.0, < 2.0)
      rspec-support (~> 3.13.0)
    rspec-mocks (3.13.2)
      diff-lcs (>= 1.2.0, < 2.0)
      rspec-support (~> 3.13.0)
    rspec-rails (7.1.0)
      actionpack (>= 7.0)
      activesupport (>= 7.0)
      railties (>= 7.0)
      rspec-core (~> 3.13)
      rspec-expectations (~> 3.13)
      rspec-mocks (~> 3.13)
      rspec-support (~> 3.13)
    rspec-support (3.13.2)
    rubocop (1.70.0)
      json (~> 2.3)
      language_server-protocol (>= 3.17.0)
      parallel (~> 1.10)
      parser (>= 3.3.0.2)
      rainbow (>= 2.2.2, < 4.0)
      regexp_parser (>= 2.9.3, < 3.0)
      rubocop-ast (>= 1.36.2, < 2.0)
      ruby-progressbar (~> 1.7)
      unicode-display_width (>= 2.4.0, < 4.0)
    rubocop-ast (1.37.0)
      parser (>= 3.3.1.0)
    ruby-progressbar (1.13.0)
    samovar (2.3.0)
      console (~> 1.0)
      mapping (~> 1.0)
    sanitize (6.1.3)
      crass (~> 1.0.2)
      nokogiri (>= 1.12.0)
    sass-rails (6.0.0)
      sassc-rails (~> 2.1, >= 2.1.1)
    sassc (2.4.0)
      ffi (~> 1.9)
    sassc-rails (2.1.2)
      railties (>= 4.0.0)
      sassc (>= 2.0)
      sprockets (> 3.0)
      sprockets-rails
      tilt
    securerandom (0.4.1)
    sentry-rails (5.22.1)
      railties (>= 5.0)
      sentry-ruby (~> 5.22.1)
    sentry-ruby (5.22.1)
      bigdecimal
      concurrent-ruby (~> 1.0, >= 1.0.2)
    shell (0.8.1)
      e2mmap
      sync
    solargraph (0.50.0)
      backport (~> 1.2)
      benchmark
      bundler (~> 2.0)
      diff-lcs (~> 1.4)
      e2mmap
      jaro_winkler (~> 1.5)
      kramdown (~> 2.3)
      kramdown-parser-gfm (~> 1.1)
      parser (~> 3.0)
      rbs (~> 2.0)
      reverse_markdown (~> 2.0)
      rubocop (~> 1.38)
      thor (~> 1.0)
      tilt (~> 2.0)
      yard (~> 0.9, >= 0.9.24)
    solargraph-rails (1.1.0)
      activesupport
      solargraph
    sprockets (4.2.1)
      concurrent-ruby (~> 1.0)
      rack (>= 2.2.4, < 4)
    sprockets-rails (3.5.2)
      actionpack (>= 6.1)
      activesupport (>= 6.1)
      sprockets (>= 3.0.0)
    stackprof (0.2.26)
    stringio (3.1.2)
    swd (2.0.3)
      activesupport (>= 3)
      attr_required (>= 0.0.5)
      faraday (~> 2.0)
      faraday-follow_redirects
    sync (0.5.0)
    temple (0.10.3)
    terser (1.2.4)
      execjs (>= 0.3.0, < 3)
    thor (1.3.2)
    thread-local (1.1.0)
    tilt (2.5.0)
    timeout (0.4.3)
    traces (0.14.1)
    turbo-rails (2.0.11)
      actionpack (>= 6.0.0)
      railties (>= 6.0.0)
    tzinfo (2.0.6)
      concurrent-ruby (~> 1.0)
    unicode-display_width (3.1.3)
      unicode-emoji (~> 4.0, >= 4.0.4)
    unicode-emoji (4.0.4)
    uri (1.0.2)
    useragent (0.16.11)
    validate_url (1.0.15)
      activemodel (>= 3.0.0)
      public_suffix
    warden (1.2.9)
      rack (>= 2.0.9)
    web-console (4.2.1)
      actionview (>= 6.0.0)
      activemodel (>= 6.0.0)
      bindex (>= 0.4.0)
      railties (>= 6.0.0)
    webfinger (2.1.3)
      activesupport
      faraday (~> 2.0)
      faraday-follow_redirects
    webmock (3.24.0)
      addressable (>= 2.8.0)
      crack (>= 0.3.2)
      hashdiff (>= 0.4.0, < 2.0.0)
    websocket-driver (0.7.7)
      base64
      websocket-extensions (>= 0.1.0)
    websocket-extensions (0.1.5)
    will_paginate (4.0.1)
    yard (0.9.37)
    zeitwerk (2.7.1)

PLATFORMS
  ruby

DEPENDENCIES
  RocketAMF!
  addressable (~> 2.8)
  async (~> 2.17)
  async-http (~> 0.75.0)
  bootsnap (~> 1.16)
  debug (~> 1.9.2)
  devise (~> 4.9, >= 4.9.2)
  devise-encryptable (~> 0.2.0)
  dotenv-rails (~> 2.8, >= 2.8.1)
  falcon (~> 0.48.0)
  haml (~> 6.1, >= 6.1.1)
  http_accept_language (~> 2.1, >= 2.1.1)
  httparty (~> 0.22.0)
  jsbundling-rails (~> 1.3)
  letter_opener (~> 1.8, >= 1.8.1)
  memory_profiler (~> 1.0)
  mysql2 (~> 0.5.5)
  nokogiri (~> 1.15, >= 1.15.3)
  omniauth (~> 2.1)
  omniauth-rails_csrf_protection (~> 1.0)
  omniauth_openid_connect (~> 0.7.1)
  parallel (~> 1.23)
  rack-attack (~> 6.7)
  rack-mini-profiler (~> 3.1)
  rails (~> 8.0, >= 8.0.1)
  rails-i18n (~> 8.0, >= 8.0.1)
  rdiscount (~> 2.2, >= 2.2.7.1)
  react-rails (~> 2.7, >= 2.7.1)
  rspec-rails (~> 7.0)
  sanitize (~> 6.0, >= 6.0.2)
  sass-rails (~> 6.0)
  sentry-rails (~> 5.12)
  sentry-ruby (~> 5.12)
  shell (~> 0.8.1)
  solargraph (~> 0.50.0)
  solargraph-rails (~> 1.1)
  sprockets (~> 4.2)
  stackprof (~> 0.2.25)
  terser (~> 1.1, >= 1.1.17)
  thread-local (~> 1.1)
  turbo-rails (~> 2.0)
  web-console (~> 4.2)
  webmock (~> 3.24)
  will_paginate (~> 4.0)

RUBY VERSION
   ruby 3.3.6p108

BUNDLED WITH
   2.5.18