Error when trying to start debug in a Rails app on Ruby 3.0.1

Open

#259 opened on Sep 8, 2021 14 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 2/5
Estimated time: 1-3 hours
Newbie friendliness: 30/100

Issue type: Bug
Clarity: Mostly clear
Activity status: Stale
Tech stack: rails, ruby
Domain: devtools

Research direction

Start with the stack-trace entry at reline-0.2.7/lib/reline/terminfo.rb and inspect how the Bundler environment resolves its fiddle dependency. Reproduce the Rails debug startup failure, then verify that rdbg can start the application without raising LoadError for fiddle.

Written by the indexing model from the issue text.

Description

It seems reline tries to use fiddle but doesn't define as dependency, so it is not setup in the bundler environment.

$ rdbg --command --open --sock-path=/home/spin/.ruby-debug-sock/ruby-debug-spin-84464 -- bin/rails server 
DEBUGGER: can not load newer irb for coloring. Write 'gem "debug" in your Gemfile.
DEBUGGER: Session start (pid: 84513)
DEBUGGER: Debugger can attach via UNIX domain socket (/home/spin/.ruby-debug-sock/ruby-debug-spin-84464)
DEBUGGER: wait for debugger connection...
DEBUGGER: Connected.
DEBUGGER: Disconnected.
/usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require': cannot load such file -- fiddle (LoadError)
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/loaded_features_index.rb:89:in `register'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:44:in `require'
        from /usr/local/bundle/gems/zeitwerk-2.5.0.beta3/lib/zeitwerk/kernel.rb:35:in `require'
        from /usr/local/bundle/gems/reline-0.2.7/lib/reline/terminfo.rb:1:in `<main>'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
        from /usr/local/bundle/gems/zeitwerk-2.5.0.beta3/lib/zeitwerk/kernel.rb:35:in `require'
        from /usr/local/bundle/gems/reline-0.2.7/lib/reline.rb:10:in `<main>'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
        from /usr/local/bundle/gems/zeitwerk-2.5.0.beta3/lib/zeitwerk/kernel.rb:35:in `require'
        from /usr/local/bundle/gems/irb-1.3.7/lib/irb.rb:13:in `<main>'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
        from /usr/local/bundle/gems/zeitwerk-2.5.0.beta3/lib/zeitwerk/kernel.rb:35:in `require'
        from /usr/local/bundle/gems/byebug-11.1.3/lib/byebug/commands/irb.rb:4:in `<main>'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
        from /usr/local/bundle/gems/zeitwerk-2.5.0.beta3/lib/zeitwerk/kernel.rb:35:in `require'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:54:in `require_relative'
        from /usr/local/bundle/gems/byebug-11.1.3/lib/byebug/commands.rb:20:in `<main>'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
        from /usr/local/bundle/gems/zeitwerk-2.5.0.beta3/lib/zeitwerk/kernel.rb:35:in `require'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:54:in `require_relative'
        from /usr/local/bundle/gems/byebug-11.1.3/lib/byebug/core.rb:10:in `<main>'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
        from /usr/local/bundle/gems/zeitwerk-2.5.0.beta3/lib/zeitwerk/kernel.rb:35:in `require'
        from /usr/local/bundle/gems/pry-byebug-3.9.0/lib/byebug/processors/pry_processor.rb:3:in `<main>'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
        from /usr/local/bundle/gems/zeitwerk-2.5.0.beta3/lib/zeitwerk/kernel.rb:35:in `require'
        from /usr/local/bundle/gems/pry-byebug-3.9.0/lib/pry-byebug/pry_ext.rb:3:in `<main>'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
        from /usr/local/bundle/gems/zeitwerk-2.5.0.beta3/lib/zeitwerk/kernel.rb:35:in `require'
        from /usr/local/bundle/gems/pry-byebug-3.9.0/lib/pry-byebug/cli.rb:4:in `<main>'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
        from /usr/local/bundle/gems/zeitwerk-2.5.0.beta3/lib/zeitwerk/kernel.rb:35:in `require'
        from /usr/local/bundle/gems/pry-0.13.1/lib/pry/plugins.rb:55:in `load_cli_options'
        from /usr/local/bundle/gems/pry-0.13.1/lib/pry/cli.rb:40:in `each'
        from /usr/local/bundle/gems/pry-0.13.1/lib/pry/cli.rb:40:in `add_plugin_options'
        from /usr/local/bundle/gems/pry-0.13.1/lib/pry/cli.rb:134:in `<main>'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
        from /usr/local/bundle/gems/zeitwerk-2.5.0.beta3/lib/zeitwerk/kernel.rb:35:in `require'
        from /usr/local/bundle/gems/pry-0.13.1/lib/pry.rb:78:in `<main>'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
        from /usr/local/bundle/gems/zeitwerk-2.5.0.beta3/lib/zeitwerk/kernel.rb:35:in `require'
        from /usr/local/bundle/gems/pry-rails-0.3.9/lib/pry-rails.rb:3:in `<main>'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
        from /usr/local/bundle/gems/zeitwerk-2.5.0.beta3/lib/zeitwerk/kernel.rb:35:in `require'
        from /usr/local/bundle/gems/bundler-2.2.22/lib/bundler/runtime.rb:66:in `block (2 levels) in require'
        from /usr/local/bundle/gems/bundler-2.2.22/lib/bundler/runtime.rb:61:in `each'
        from /usr/local/bundle/gems/bundler-2.2.22/lib/bundler/runtime.rb:61:in `block in require'
        from /usr/local/bundle/gems/bundler-2.2.22/lib/bundler/runtime.rb:50:in `each'
        from /usr/local/bundle/gems/bundler-2.2.22/lib/bundler/runtime.rb:50:in `require'
        from /usr/local/bundle/gems/bundler-2.2.22/lib/bundler.rb:174:in `require'
        from /src/github.com/shopify/shopify/config/application.rb:32:in `<main>'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
        from /usr/local/bundle/gems/zeitwerk-2.5.0.beta3/lib/zeitwerk/kernel.rb:35:in `require'
        from /usr/local/bundle/bundler/gems/rails-78e402077d4d/railties/lib/rails/commands/server/server_command.rb:137:in `block in perform'
        from <internal:kernel>:90:in `tap'
        from /usr/local/bundle/bundler/gems/rails-78e402077d4d/railties/lib/rails/commands/server/server_command.rb:134:in `perform'
        from /usr/local/bundle/gems/thor-1.1.0/lib/thor/command.rb:27:in `run'
        from /usr/local/bundle/gems/thor-1.1.0/lib/thor/invocation.rb:127:in `invoke_command'
        from /usr/local/bundle/gems/thor-1.1.0/lib/thor.rb:392:in `dispatch'
        from /usr/local/bundle/bundler/gems/rails-78e402077d4d/railties/lib/rails/command/base.rb:87:in `perform'
        from /usr/local/bundle/bundler/gems/rails-78e402077d4d/railties/lib/rails/command.rb:48:in `invoke'
        from /usr/local/bundle/bundler/gems/rails-78e402077d4d/railties/lib/rails/commands.rb:18:in `<main>'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
        from /usr/local/bundle/gems/bootsnap-1.8.1/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
        from /src/github.com/shopify/shopify/bin/rails:9:in `<top (required)>'
        from /usr/local/bundle/bundler/gems/spring-53d9e17d7f12/lib/spring/client/rails.rb:28:in `load'
        from /usr/local/bundle/bundler/gems/spring-53d9e17d7f12/lib/spring/client/rails.rb:28:in `call'
        from /usr/local/bundle/bundler/gems/spring-53d9e17d7f12/lib/spring/client/command.rb:7:in `call'
        from /usr/local/bundle/bundler/gems/spring-53d9e17d7f12/lib/spring/client.rb:30:in `run'
        from /usr/local/bundle/bundler/gems/spring-53d9e17d7f12/bin/spring:49:in `<top (required)>'
        from /usr/local/bundle/bundler/gems/spring-53d9e17d7f12/lib/spring/binstub.rb:11:in `load'
        from /usr/local/bundle/bundler/gems/spring-53d9e17d7f12/lib/spring/binstub.rb:11:in `<top (required)>'
        from /src/github.com/shopify/shopify/bin/spring:24:in `require'
        from /src/github.com/shopify/shopify/bin/spring:24:in `<top (required)>'
        from bin/rails:3:in `load'
        from bin/rails:3:in `<main>'

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