Grape 2.1.x fail to compile, NoMethodError: undefined method `[]' for nil in grape/dsl/inside_route.rb:421:in `route'

[DonMat]

I've an issue after upgrade Grape from 2.0 to 2.1.x
My apps setup. The same error is produced on:
Ruby 3.3.4, Rails 7.2
Ruby 3.3.1 , Rails 7.0.8.4, 7.1.3.3
Official repo Grape on Rails behaves the same after upgrade Grape locally to 2.1.3

Steps to reproduce:

• Use any of Ruby 3.x and Rails 7.x
• Use Twitter::API example form readme
• Try to compile Twitter::API.compile! with Grape 2.0
• Upgrade Grape to 2.1.*
• Try to compile Twitter::API.compile!

Twitter::Api.compile!
An error occurred when inspecting the object: #<NoMethodError: undefined method `[]' for nil>
An error occurred when running Kernel#inspect: #<NoMethodError: undefined method `[]' for nil>
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/grape-2.1.3/lib/grape/dsl/inside_route.rb:423:in `route'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/grape-2.1.3/lib/grape/endpoint.rb:409:in `inspect'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/activesupport-7.2.1/lib/active_support/ordered_options.rb:69:in `inspect'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/activesupport-7.2.1/lib/active_support/ordered_options.rb:69:in `inspect'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/irb-1.14.0/lib/irb/inspector.rb:101:in `inspect'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/irb-1.14.0/lib/irb/inspector.rb:101:in `inspect'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/irb-1.14.0/lib/irb/inspector.rb:101:in `inspect'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/irb-1.14.0/lib/irb/inspector.rb:101:in `inspect'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/irb-1.14.0/lib/irb/inspector.rb:101:in `bind_call'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/irb-1.14.0/lib/irb/inspector.rb:101:in `rescue in inspect_value'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/irb-1.14.0/lib/irb/inspector.rb:95:in `inspect_value'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/irb-1.14.0/lib/irb/context.rb:639:in `inspect_last_value'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/irb-1.14.0/lib/irb.rb:1395:in `output_value'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/irb-1.14.0/lib/irb.rb:1057:in `block (2 levels) in eval_input'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/irb-1.14.0/lib/irb.rb:1388:in `signal_status'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/irb-1.14.0/lib/irb.rb:1041:in `block in eval_input'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/irb-1.14.0/lib/irb.rb:1120:in `block in each_top_level_statement'
<internal:kernel>:187:in `loop'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/irb-1.14.0/lib/irb.rb:1117:in `each_top_level_statement'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/irb-1.14.0/lib/irb.rb:1040:in `eval_input'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/irb-1.14.0/lib/irb.rb:1021:in `block in run'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/irb-1.14.0/lib/irb.rb:1020:in `catch'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/irb-1.14.0/lib/irb.rb:1020:in `run'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/railties-7.2.1/lib/rails/commands/console/irb_console.rb:119:in `start'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/railties-7.2.1/lib/rails/commands/console/console_command.rb:59:in `start'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/railties-7.2.1/lib/rails/commands/console/console_command.rb:8:in `start'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/railties-7.2.1/lib/rails/commands/console/console_command.rb:87:in `perform'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/thor-1.3.2/lib/thor/command.rb:28:in `run'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/thor-1.3.2/lib/thor/invocation.rb:127:in `invoke_command'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/railties-7.2.1/lib/rails/command/base.rb:178:in `invoke_command'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/thor-1.3.2/lib/thor.rb:538:in `dispatch'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/railties-7.2.1/lib/rails/command/base.rb:73:in `perform'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/railties-7.2.1/lib/rails/command.rb:71:in `block in invoke'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/railties-7.2.1/lib/rails/command.rb:149:in `with_argv'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/railties-7.2.1/lib/rails/command.rb:69:in `invoke'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/railties-7.2.1/lib/rails/commands.rb:18:in `<main>'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/3.3.0/bundled_gems.rb:74:in `require'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/3.3.0/bundled_gems.rb:74:in `block (2 levels) in replace_require'
/Users/rails/.rbenv/versions/3.3.1/lib/ruby/gems/3.3.0/gems/bootsnap-1.18.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in `require'
bin/rails:4:in `<main>'

[dblock]

This is similar to #1956 I believe, what version of Rack do you have? Can you put up a repro where this happens please?

I've upgraded grape to 2.x in ruby-grape/grape-on-rails#65 and it worked ok.

[DonMat]

@dblock I have rack 3.1.7 on Rails 7.2. Something weird is here. Error exists in rails console but api works well on rails server. grape-swagger-rails produce valid swagger.

This is my Gemfil.lock

GEM
  remote: https://rubygems.org/
  specs:
    actioncable (7.2.0)
      actionpack (= 7.2.0)
      activesupport (= 7.2.0)
      nio4r (~> 2.0)
      websocket-driver (>= 0.6.1)
      zeitwerk (~> 2.6)
    actionmailbox (7.2.0)
      actionpack (= 7.2.0)
      activejob (= 7.2.0)
      activerecord (= 7.2.0)
      activestorage (= 7.2.0)
      activesupport (= 7.2.0)
      mail (>= 2.8.0)
    actionmailer (7.2.0)
      actionpack (= 7.2.0)
      actionview (= 7.2.0)
      activejob (= 7.2.0)
      activesupport (= 7.2.0)
      mail (>= 2.8.0)
      rails-dom-testing (~> 2.2)
    actionpack (7.2.0)
      actionview (= 7.2.0)
      activesupport (= 7.2.0)
      nokogiri (>= 1.8.5)
      racc
      rack (>= 2.2.4, < 3.2)
      rack-session (>= 1.0.1)
      rack-test (>= 0.6.3)
      rails-dom-testing (~> 2.2)
      rails-html-sanitizer (~> 1.6)
      useragent (~> 0.16)
    actiontext (7.2.0)
      actionpack (= 7.2.0)
      activerecord (= 7.2.0)
      activestorage (= 7.2.0)
      activesupport (= 7.2.0)
      globalid (>= 0.6.0)
      nokogiri (>= 1.8.5)
    actionview (7.2.0)
      activesupport (= 7.2.0)
      builder (~> 3.1)
      erubi (~> 1.11)
      rails-dom-testing (~> 2.2)
      rails-html-sanitizer (~> 1.6)
    activejob (7.2.0)
      activesupport (= 7.2.0)
      globalid (>= 0.3.6)
    activemodel (7.2.0)
      activesupport (= 7.2.0)
    activerecord (7.2.0)
      activemodel (= 7.2.0)
      activesupport (= 7.2.0)
      timeout (>= 0.4.0)
    activestorage (7.2.0)
      actionpack (= 7.2.0)
      activejob (= 7.2.0)
      activerecord (= 7.2.0)
      activesupport (= 7.2.0)
      marcel (~> 1.0)
    activesupport (7.2.0)
      base64
      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)
    api-pagination (6.0.0)
    ast (2.4.2)
    awesome_print (1.9.2)
    backport (1.2.0)
    base64 (0.2.0)
    benchmark (0.3.0)
    bigdecimal (3.1.8)
    bindex (0.8.1)
    bootsnap (1.18.4)
      msgpack (~> 1.2)
    brakeman (6.1.2)
      racc
    builder (3.3.0)
    bullet (7.2.0)
      activesupport (>= 3.0.0)
      uniform_notifier (~> 1.11)
    concurrent-ruby (1.3.4)
    connection_pool (2.4.1)
    crass (1.0.6)
    database_cleaner (2.0.2)
      database_cleaner-active_record (>= 2, < 3)
    database_cleaner-active_record (2.2.0)
      activerecord (>= 5.a)
      database_cleaner-core (~> 2.0.0)
    database_cleaner-core (2.0.1)
    date (3.3.4)
    debug (1.9.2)
      irb (~> 1.10)
      reline (>= 0.3.8)
    diff-lcs (1.5.1)
    docile (1.4.1)
    drb (2.2.1)
    dry-core (1.0.1)
      concurrent-ruby (~> 1.0)
      zeitwerk (~> 2.6)
    dry-inflector (1.1.0)
    dry-logic (1.5.0)
      concurrent-ruby (~> 1.0)
      dry-core (~> 1.0, < 2)
      zeitwerk (~> 2.6)
    dry-types (1.7.2)
      bigdecimal (~> 3.0)
      concurrent-ruby (~> 1.0)
      dry-core (~> 1.0)
      dry-inflector (~> 1.0)
      dry-logic (~> 1.4)
      zeitwerk (~> 2.6)
    e2mmap (0.1.0)
    erubi (1.13.0)
    factory_bot (6.4.6)
      activesupport (>= 5.0.0)
    factory_bot_rails (6.4.3)
      factory_bot (~> 6.4)
      railties (>= 5.0.0)
    faraday (2.11.0)
      faraday-net_http (>= 2.0, < 3.4)
      logger
    faraday-multipart (1.0.4)
      multipart-post (~> 2)
    faraday-net_http (3.3.0)
      net-http
    globalid (1.2.1)
      activesupport (>= 6.1)
    grape (2.1.3)
      activesupport (>= 6)
      dry-types (>= 1.1)
      mustermann-grape (~> 1.1.0)
      rack (>= 2)
      zeitwerk
    grape-entity (1.0.1)
      activesupport (>= 3.0.0)
      multi_json (>= 1.3.2)
    grape-swagger (2.1.0)
      grape (>= 1.7, < 3.0)
      rack-test (~> 2)
    grape-swagger-entity (0.5.4)
      grape-entity (~> 1)
      grape-swagger (~> 2)
    grape-swagger-rails (0.5.0)
      railties (>= 6.0.6.1)
    grape_on_rails_routes (0.3.2)
      rails (>= 3.1.1)
    i18n (1.14.5)
      concurrent-ruby (~> 1.0)
    importmap-rails (2.0.1)
      actionpack (>= 6.0.0)
      activesupport (>= 6.0.0)
      railties (>= 6.0.0)
    io-console (0.7.2)
    irb (1.14.0)
      rdoc (>= 4.0.0)
      reline (>= 0.4.2)
    jaro_winkler (1.6.0)
    jbuilder (2.12.0)
      actionview (>= 5.0.0)
      activesupport (>= 5.0.0)
    json (2.7.2)
    kramdown (2.4.0)
      rexml
    kramdown-parser-gfm (1.1.0)
      kramdown (~> 2.0)
    language_server-protocol (3.17.0.3)
    logger (1.6.0)
    loofah (2.22.0)
      crass (~> 1.0.2)
      nokogiri (>= 1.12.0)
    mail (2.8.1)
      mini_mime (>= 0.1.1)
      net-imap
      net-pop
      net-smtp
    marcel (1.0.4)
    mini_mime (1.1.5)
    minitest (5.25.1)
    msgpack (1.7.2)
    multi_json (1.15.0)
    multipart-post (2.4.1)
    mustermann (3.0.2)
      ruby2_keywords (~> 0.0.1)
    mustermann-grape (1.1.0)
      mustermann (>= 1.0.0)
    net-http (0.4.1)
      uri
    net-imap (0.4.14)
      date
      net-protocol
    net-pop (0.1.2)
      net-protocol
    net-protocol (0.2.2)
      timeout
    net-smtp (0.5.0)
      net-protocol
    nio4r (2.7.3)
    nokogiri (1.16.7-aarch64-linux)
      racc (~> 1.4)
    nokogiri (1.16.7-arm-linux)
      racc (~> 1.4)
    nokogiri (1.16.7-arm64-darwin)
      racc (~> 1.4)
    nokogiri (1.16.7-x86-linux)
      racc (~> 1.4)
    nokogiri (1.16.7-x86_64-darwin)
      racc (~> 1.4)
    nokogiri (1.16.7-x86_64-linux)
      racc (~> 1.4)
    pagy (9.0.6)
    parallel (1.26.3)
    parser (3.3.4.2)
      ast (~> 2.4.1)
      racc
    pg (1.5.7)
    psych (5.1.2)
      stringio
    puma (6.4.2)
      nio4r (~> 2.0)
    racc (1.8.1)
    rack (3.1.7)
    rack-cors (2.0.2)
      rack (>= 2.0.0)
    rack-session (2.0.0)
      rack (>= 3.0.0)
    rack-test (2.1.0)
      rack (>= 1.3)
    rackup (2.1.0)
      rack (>= 3)
      webrick (~> 1.8)
    rails (7.2.0)
      actioncable (= 7.2.0)
      actionmailbox (= 7.2.0)
      actionmailer (= 7.2.0)
      actionpack (= 7.2.0)
      actiontext (= 7.2.0)
      actionview (= 7.2.0)
      activejob (= 7.2.0)
      activemodel (= 7.2.0)
      activerecord (= 7.2.0)
      activestorage (= 7.2.0)
      activesupport (= 7.2.0)
      bundler (>= 1.15.0)
      railties (= 7.2.0)
    rails-dom-testing (2.2.0)
      activesupport (>= 5.0.0)
      minitest
      nokogiri (>= 1.6)
    rails-html-sanitizer (1.6.0)
      loofah (~> 2.21)
      nokogiri (~> 1.14)
    railties (7.2.0)
      actionpack (= 7.2.0)
      activesupport (= 7.2.0)
      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)
    rdoc (6.7.0)
      psych (>= 4.0.0)
    regexp_parser (2.9.2)
    reline (0.5.9)
      io-console (~> 0.5)
    reverse_markdown (2.1.1)
      nokogiri
    rexml (3.3.6)
      strscan
    rspec-core (3.13.0)
      rspec-support (~> 3.13.0)
    rspec-expectations (3.13.2)
      diff-lcs (>= 1.2.0, < 2.0)
      rspec-support (~> 3.13.0)
    rspec-mocks (3.13.1)
      diff-lcs (>= 1.2.0, < 2.0)
      rspec-support (~> 3.13.0)
    rspec-rails (6.1.4)
      actionpack (>= 6.1)
      activesupport (>= 6.1)
      railties (>= 6.1)
      rspec-core (~> 3.13)
      rspec-expectations (~> 3.13)
      rspec-mocks (~> 3.13)
      rspec-support (~> 3.13)
    rspec-support (3.13.1)
    rubocop (1.65.1)
      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 (>= 2.4, < 3.0)
      rexml (>= 3.2.5, < 4.0)
      rubocop-ast (>= 1.31.1, < 2.0)
      ruby-progressbar (~> 1.7)
      unicode-display_width (>= 2.4.0, < 3.0)
    rubocop-ast (1.32.1)
      parser (>= 3.3.1.0)
    rubocop-minitest (0.35.1)
      rubocop (>= 1.61, < 2.0)
      rubocop-ast (>= 1.31.1, < 2.0)
    rubocop-performance (1.21.1)
      rubocop (>= 1.48.1, < 2.0)
      rubocop-ast (>= 1.31.1, < 2.0)
    rubocop-rails (2.25.1)
      activesupport (>= 4.2.0)
      rack (>= 1.1)
      rubocop (>= 1.33.0, < 2.0)
      rubocop-ast (>= 1.31.1, < 2.0)
    rubocop-rails-omakase (1.0.0)
      rubocop
      rubocop-minitest
      rubocop-performance
      rubocop-rails
    ruby-progressbar (1.13.0)
    ruby2_keywords (0.0.5)
    securerandom (0.3.1)
    shoulda-matchers (6.4.0)
      activesupport (>= 5.2.0)
    simplecov (0.22.0)
      docile (~> 1.1)
      simplecov-html (~> 0.11)
      simplecov_json_formatter (~> 0.1)
    simplecov-html (0.12.3)
    simplecov_json_formatter (0.1.4)
    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)
    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)
    stimulus-rails (1.3.4)
      railties (>= 6.0.0)
    stringio (3.1.1)
    strscan (3.1.0)
    thor (1.3.1)
    tilt (2.4.0)
    timeout (0.4.1)
    turbo-rails (2.0.6)
      actionpack (>= 6.0.0)
      activejob (>= 6.0.0)
      railties (>= 6.0.0)
    tzinfo (2.0.6)
      concurrent-ruby (~> 1.0)
    unicode-display_width (2.5.0)
    uniform_notifier (1.16.0)
    uri (0.13.0)
    useragent (0.16.10)
    web-console (4.2.1)
      actionview (>= 6.0.0)
      activemodel (>= 6.0.0)
      bindex (>= 0.4.0)
      railties (>= 6.0.0)
    webrick (1.8.1)
    websocket-driver (0.7.6)
      websocket-extensions (>= 0.1.0)
    websocket-extensions (0.1.5)
    yard (0.9.36)
    zeitwerk (2.6.17)

PLATFORMS
  aarch64-linux
  arm-linux
  arm64-darwin
  x86-linux
  x86_64-darwin
  x86_64-linux

DEPENDENCIES
  api-pagination
  awesome_print
  bootsnap
  brakeman
  bullet
  database_cleaner
  debug
  factory_bot_rails
  grape (~> 2.0)
  grape-entity
  grape-swagger
  grape-swagger-entity (~> 0.3)
  grape-swagger-rails
  grape_on_rails_routes
  importmap-rails
  jbuilder
  pagy (~> 9.0)
  pg (~> 1.1)
  puma (>= 5.0)
  rack-cors (~> 2.0)
  rails (~> 7.2.0)
  rspec-rails (~> 6.1.0)
  rubocop
  rubocop-performance
  rubocop-rails
  rubocop-rails-omakase
  shoulda-matchers (~> 6.0)
  simplecov
  solargraph
  sprockets-rails
  stimulus-rails
  turbo-rails
  tzinfo-data
  web-console

BUNDLED WITH
   2.5.17

[DonMat]

@dblock I've checked your ruby-grape/grape-on-rails#65 and the problem exists in console.

In code

grape/lib/grape/dsl/inside_route.rb

Line 423 in dfc0e16

env[Grape::Env::GRAPE_ROUTING_ARGS][:route_info]

env is nil

[ericproulx]

#2444 introduced the bug.

[ericproulx]

@DonMat the error occurs only when compiling in console ? When compiling in console, it calls inspect on endpoint and it fails.

[dblock]

Looks like we now understand why it happens.

Can either of you help with an integration test that is a big higher level than the fix in #2492? I'd like a test that reproduces "it doesn't work in console" in https://github.com/ruby-grape/grape-swagger-rails and here, so we can catch similar regressions easier.

[dblock]

@DonMat test w/HEAD please?

[DonMat]

@dblock It work like a charm. Thank you for very fast fix.
Tested on:

  remote: git@github.com:ruby-grape/grape.git
  revision: 1cf4a801efc22e65c4fb342ead57fe3c428a4b8d
  branch: master