Format on save not working in VS Code

[graygilmore]

Description

Ruby LSP Information

VS Code Version

1.96.2

Ruby LSP Extension Version

0.9.7

Ruby LSP Server Version

0.23.11

Ruby LSP Add-ons

• Ruby LSP Rails
• Tapioca
• RuboCop

Ruby Version

3.4.1

Ruby Version Manager

shadowenv

Installed Extensions

Click to expand

• EditorConfig (0.17.1)
• explorer (1.16.0)
• gitlens (16.3.2)
• polaris-for-vscode (0.9.8)
• prettier-vscode (11.0.0)
• remote-ssh (0.113.1)
• remote-ssh-edit (0.87.0)
• ruby-extensions-pack (0.1.13)
• ruby-lsp (0.9.7)
• sorbet-vscode-extension (0.3.40)
• theme-check-vscode (3.6.0)
• vscode-bazel (0.11.0)
• vscode-eslint (3.0.10)
• vscode-graphql (0.13.0)
• vscode-graphql-syntax (1.3.8)
• vscode-rdbg (0.2.2)
• vscode-stylelint (1.4.0)
• vscode-theme-onelight (2.3.0)

Ruby LSP Settings

Click to expand

Workspace

{
  "testTimeout": 300,
  "featureFlags": {
    "tapiocaAddon": true
  }
}

User

{
  "enabledFeatures": {
    "codeActions": true,
    "diagnostics": true,
    "documentHighlights": true,
    "documentLink": true,
    "documentSymbols": true,
    "foldingRanges": true,
    "formatting": true,
    "hover": true,
    "inlayHint": true,
    "onTypeFormatting": false,
    "selectionRanges": true,
    "semanticHighlighting": true,
    "completion": true,
    "codeLens": true,
    "definition": true,
    "workspaceSymbol": true,
    "signatureHelp": true,
    "typeHierarchy": true
  },
  "featuresConfiguration": {},
  "addonSettings": {},
  "rubyVersionManager": {
    "identifier": "auto"
  },
  "customRubyCommand": "",
  "formatter": "auto",
  "linters": null,
  "bundleGemfile": "",
  "testTimeout": 300,
  "branch": "",
  "pullDiagnosticsOn": "both",
  "useBundlerCompose": false,
  "bypassTypechecker": false,
  "rubyExecutablePath": "",
  "indexing": {},
  "erbSupport": true,
  "featureFlags": {
    "tapiocaAddon": true
  },
  "sigOpacityLevel": "1"
}

Reproduction steps

1. Open any Ruby file
2. Write code that should trigger a RuboCop Layout error
3. Hit Save

Expected behavior

The file should be formatted based on the RuboCop rules

Actual behavior

No auto formatting happens.

Example

def foo; end

  def bar; end

should become:

def foo; end

def bar; end

Ruby LSP Output

I see a stack trace when Ruby LSP is booting up:

2025-03-07 11:12:34.352 [info] (shopify) [RuboCop] Initialized RuboCop LSP addon 1.71.2.

2025-03-07 11:12:34.392 [info] (shopify) Error loading addons:

<REPO>/vendor/bundle/ruby/3.4.0/gems/rubocop-1.71.2/lib/rubocop/cop/registry.rb:68:in 'RuboCop::Cop::Registry#dismiss': Cop RuboCop::Cop::Cop could not be dismissed (RuntimeError)
	from <REPO>/vendor/bundle/ruby/3.4.0/gems/rubocop-1.71.2/lib/rubocop/cop/base.rb:82:in 'RuboCop::Cop::Base.exclude_from_registry'
	from <REPO>/vendor/bundle/ruby/3.4.0/gems/rubocop-1.71.2/lib/rubocop/cop/cop.rb:14:in '<class:Cop>'

From the command line

If I run bundle exec rubocop -a <my-file> then it does successfully update the file to the correct format so I believe this to be a problem with the extension itself rather than RuboCop.

[andyw8]

RuboCop::Cop::Cop looks suspicious. This might be some kind of naming clash.

[graygilmore]

So this ended up being an issue with a rogue 1.71.2 version of Rubocop conflicting with the new version (1.73.2) that was also installed. Remove the old version got this working again.

[connorshea]

I've been running into this same issue since March, unfortunately. It seems to have to do with using the Rails app in Docker and it installing the gems to the vendor/ directory.

2025-07-16 13:57:03.573 [info] (fifthasset-web) The Gemfile's dependencies are satisfied

2025-07-16 13:57:05.314 [info] (fifthasset-web) Initializing Ruby LSP v0.25.0 https://github.com/Shopify/ruby-lsp/releases/tag/v0.25.0....
2025-07-16 13:57:05.321 [info] (fifthasset-web) Auto detected formatter: rubocop_internal
2025-07-16 13:57:05.321 [info] (fifthasset-web) Auto detected linters: rubocop_internal
2025-07-16 13:57:05.321 [info] (fifthasset-web) Detected test library: rspec
2025-07-16 13:57:05.321 [info] (fifthasset-web) Finished initializing Ruby LSP!
2025-07-16 13:57:06.663 [info] (fifthasset-web) /Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/version.rb:6: warning: already initialized constant RuboCop::Version::STRING
/Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/rubocop-1.75.1/lib/rubocop/version.rb:6: warning: previous definition of STRING was here
/Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/version.rb:8: warning: already initialized constant RuboCop::Version::MSG
/Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/rubocop-1.75.1/lib/rubocop/version.rb:8: warning: previous definition of MSG was here
/Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/version.rb:13: warning: already initialized constant RuboCop::Version::MINIMUM_PARSABLE_PRISM_VERSION
/Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/rubocop-1.75.1/lib/rubocop/version.rb:13: warning: previous definition of MINIMUM_PARSABLE_PRISM_VERSION was here
/Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/version.rb:15: warning: already initialized constant RuboCop::Version::CANONICAL_FEATURE_NAMES
/Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/rubocop-1.75.1/lib/rubocop/version.rb:15: warning: previous definition of CANONICAL_FEATURE_NAMES was here
/Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/version.rb:19: warning: already initialized constant RuboCop::Version::EXTENSION_PATH_NAMES
/Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/rubocop-1.75.1/lib/rubocop/version.rb:19: warning: previous definition of EXTENSION_PATH_NAMES was here

2025-07-16 13:57:06.663 [info] (fifthasset-web) /Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/ast_aliases.rb:5: warning: already initialized constant RuboCop::NodePattern
/Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/rubocop-1.75.1/lib/rubocop/ast_aliases.rb:5: warning: previous definition of NodePattern was here
/Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/ast_aliases.rb:6: warning: already initialized constant RuboCop::ProcessedSource
/Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/rubocop-1.75.1/lib/rubocop/ast_aliases.rb:6: warning: previous definition of ProcessedSource was here
/Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/ast_aliases.rb:7: warning: already initialized constant RuboCop::Token
/Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/rubocop-1.75.1/lib/rubocop/ast_aliases.rb:7: warning: previous definition of Token was here

2025-07-16 13:57:06.664 [info] (fifthasset-web) /Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/ext/regexp_node.rb:7: warning: already initialized constant RuboCop::Ext::RegexpNode::ANY
/Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/rubocop-1.75.1/lib/rubocop/ext/regexp_node.rb:7: warning: previous definition of ANY was here

2025-07-16 13:57:06.666 [info] (fifthasset-web) /Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/path_util.rb:35: warning: already initialized constant RuboCop::PathUtil::SMART_PATH_CACHE
/Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/rubocop-1.75.1/lib/rubocop/path_util.rb:35: warning: previous definition of SMART_PATH_CACHE was here

2025-07-16 13:57:06.666 [info] (fifthasset-web) /Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/path_util.rb:105: warning: already initialized constant RuboCop::PathUtil::HIDDEN_FILE_PATTERN
/Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/rubocop-1.75.1/lib/rubocop/path_util.rb:105: warning: previous definition of HIDDEN_FILE_PATTERN was here

2025-07-16 13:57:06.667 [info] (fifthasset-web) /Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/string_interpreter.rb:8: warning: already initialized constant RuboCop::StringInterpreter::STRING_ESCAPES
/Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/rubocop-1.75.1/lib/rubocop/string_interpreter.rb:8: warning: previous definition of STRING_ESCAPES was here

2025-07-16 13:57:06.667 [info] (fifthasset-web) /Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/string_interpreter.rb:12: warning: already initialized constant RuboCop::StringInterpreter::STRING_ESCAPE_REGEX
/Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/rubocop-1.75.1/lib/rubocop/string_interpreter.rb:12: warning: previous definition of STRING_ESCAPE_REGEX was here

2025-07-16 13:57:06.669 [info] (fifthasset-web) /Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/cop/util.rb:12: warning: already initialized constant RuboCop::Cop::Util::LITERAL_REGEX
/Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/rubocop-1.75.1/lib/rubocop/cop/util.rb:12: warning: previous definition of LITERAL_REGEX was here
/Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/cop/util.rb:102: warning: already initialized constant RuboCop::Cop::Util::MAX_LINE_BEGINS_REGEX_INDEX
/Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/rubocop-1.75.1/lib/rubocop/cop/util.rb:102: warning: previous definition of MAX_LINE_BEGINS_REGEX_INDEX was here
/Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/cop/util.rb:103: warning: already initialized constant RuboCop::Cop::Util::LINE_BEGINS_REGEX_CACHE
/Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/rubocop-1.75.1/lib/rubocop/cop/util.rb:103: warning: previous definition of LINE_BEGINS_REGEX_CACHE was here

2025-07-16 13:57:06.669 [info] (fifthasset-web) /Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/cop/offense.rb:10: warning: already initialized constant RuboCop::Cop::Offense::COMPARISON_ATTRIBUTES
/Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/rubocop-1.75.1/lib/rubocop/cop/offense.rb:10: warning: previous definition of COMPARISON_ATTRIBUTES was here
/Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/cop/offense.rb:63: warning: already initialized constant RuboCop::Cop::Offense::PseudoSourceRange
/Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/rubocop-1.75.1/lib/rubocop/cop/offense.rb:63: warning: previous definition of PseudoSourceRange was here

2025-07-16 13:57:06.669 [info] (fifthasset-web) /Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/cop/offense.rb:80: warning: already initialized constant RuboCop::Cop::Offense::NO_LOCATION
/Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/rubocop-1.75.1/lib/rubocop/cop/offense.rb:80: warning: previous definition of NO_LOCATION was here

2025-07-16 13:57:06.672 [info] (fifthasset-web) /Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/cop/registry.rb:8: warning: already initialized constant RuboCop::Cop::AmbiguousCopName::MSG
/Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/rubocop-1.75.1/lib/rubocop/cop/registry.rb:8: warning: previous definition of MSG was here

2025-07-16 13:57:06.674 [info] (fifthasset-web) /Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/cop/base.rb:48: warning: already initialized constant RuboCop::Cop::Base::InvestigationReport
/Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/rubocop-1.75.1/lib/rubocop/cop/base.rb:48: warning: previous definition of InvestigationReport was here

2025-07-16 13:57:06.674 [info] (fifthasset-web) /Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/cop/base.rb:51: warning: already initialized constant RuboCop::Cop::Base::RESTRICT_ON_SEND
/Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/rubocop-1.75.1/lib/rubocop/cop/base.rb:51: warning: previous definition of RESTRICT_ON_SEND was here
/Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/cop/base.rb:405: warning: already initialized constant RuboCop::Cop::Base::EMPTY_OFFENSES
/Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/rubocop-1.75.1/lib/rubocop/cop/base.rb:405: warning: previous definition of EMPTY_OFFENSES was here

2025-07-16 13:57:06.675 [info] (fifthasset-web) [RuboCop] Activating RuboCop LSP addon 1.75.1.

2025-07-16 13:57:06.675 [info] (fifthasset-web) Activating Ruby LSP Rails add-on v0.4.7
2025-07-16 13:57:06.680 [info] (fifthasset-web) Ruby LSP Rails booting server
2025-07-16 13:57:07.104 [info] (fifthasset-web) /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/rubocop-1.75.1/config/default.yml: Naming/VariableName has the wrong namespace - replace it with RSpec/VariableName

2025-07-16 13:57:07.104 [info] (fifthasset-web) /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/rubocop-1.75.1/config/default.yml: Style/ClassCheck has the wrong namespace - replace it with RSpec/ClassCheck

2025-07-16 13:57:07.108 [info] (fifthasset-web) /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/rubocop-1.75.1/config/default.yml: Style/SafeNavigation has the wrong namespace - replace it with Rails/SafeNavigation

2025-07-16 13:57:07.164 [info] (fifthasset-web) [RuboCop] Initialized RuboCop LSP addon 1.75.1.

2025-07-16 13:57:07.167 [info] (fifthasset-web) Error loading addons:

/Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/cop/registry.rb:68:in 'RuboCop::Cop::Registry#dismiss': Cop RuboCop::Cop::Cop could not be dismissed (RuntimeError)
	from /Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/cop/base.rb:82:in 'RuboCop::Cop::Base.exclude_from_registry'
	from /Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/cop/cop.rb:14:in '<class:Cop>'
	from /Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/cop/cop.rb:11:in '<module:Cop>'
	from /Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/cop/cop.rb:7:in '<module:RuboCop>'
	from /Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop/cop/cop.rb:6:in '<top (required)>'
	from /Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop.rb:51:in 'Kernel#require_relative'
	from /Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/rubocop.rb:51:in '<top (required)>'
	from /Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/ruby_lsp/rubocop/addon.rb:3:in 'Kernel#require_relative'
	from /Users/connor.shea/code/fifthasset-web/vendor/bundle/ruby/3.4.0/gems/rubocop-1.75.1/lib/ruby_lsp/rubocop/addon.rb:3:in '<top (required)>'
	from /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/3.4.0/bundled_gems.rb:82:in 'Kernel.require'
	from /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/3.4.0/bundled_gems.rb:82:in 'block (2 levels) in Kernel#replace_require'
	from /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/ruby-lsp-0.25.0/lib/ruby_lsp/addon.rb:73:in 'block in RubyLsp::Addon.load_addons'
	from /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/ruby-lsp-0.25.0/lib/ruby_lsp/addon.rb:68:in 'Array#each'
	from /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/ruby-lsp-0.25.0/lib/ruby_lsp/addon.rb:68:in 'Enumerable#filter_map'
	from /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/ruby-lsp-0.25.0/lib/ruby_lsp/addon.rb:68:in 'RubyLsp::Addon.load_addons'
	from /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/ruby-lsp-0.25.0/lib/ruby_lsp/server.rb:169:in 'RubyLsp::Server#load_addons'
	from /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/ruby-lsp-0.25.0/lib/ruby_lsp/server.rb:342:in 'RubyLsp::Server#run_initialized'
	from /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/ruby-lsp-0.25.0/lib/ruby_lsp/server.rb:20:in 'RubyLsp::Server#process_message'
	from /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/ruby-lsp-0.25.0/lib/ruby_lsp/base_server.rb:88:in 'block in RubyLsp::BaseServer#start'
	from /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/ruby-lsp-0.25.0/lib/ruby_lsp/utils.rb:320:in 'RubyLsp::MessageReader#each_message'
	from /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/ruby-lsp-0.25.0/lib/ruby_lsp/base_server.rb:39:in 'RubyLsp::BaseServer#start'
	from /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/ruby-lsp-0.25.0/exe/ruby-lsp:160:in '<top (required)>'
	from /Users/connor.shea/.rbenv/versions/3.4.2/bin/ruby-lsp:25:in 'Kernel#load'
	from /Users/connor.shea/.rbenv/versions/3.4.2/bin/ruby-lsp:25:in '<top (required)>'
	from /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/site_ruby/3.4.0/bundler/cli/exec.rb:59:in 'Kernel.load'
	from /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/site_ruby/3.4.0/bundler/cli/exec.rb:59:in 'Bundler::CLI::Exec#kernel_load'
	from /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/site_ruby/3.4.0/bundler/cli/exec.rb:23:in 'Bundler::CLI::Exec#run'
	from /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/site_ruby/3.4.0/bundler/cli.rb:452:in 'Bundler::CLI#exec'
	from /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/site_ruby/3.4.0/bundler/vendor/thor/lib/thor/command.rb:28:in 'Bundler::Thor::Command#run'
	from /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/site_ruby/3.4.0/bundler/vendor/thor/lib/thor/invocation.rb:127:in 'Bundler::Thor::Invocation#invoke_command'
	from /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/site_ruby/3.4.0/bundler/vendor/thor/lib/thor.rb:538:in 'Bundler::Thor.dispatch'
	from /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/site_ruby/3.4.0/bundler/cli.rb:35:in 'Bundler::CLI.dispatch'
	from /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/site_ruby/3.4.0/bundler/vendor/thor/lib/thor/base.rb:584:in 'Bundler::Thor::Base::ClassMethods#start'
	from /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/site_ruby/3.4.0/bundler/cli.rb:29:in 'Bundler::CLI.start'
	from /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/bundler-2.6.5/exe/bundle:28:in 'block in <top (required)>'
	from /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/site_ruby/3.4.0/bundler/friendly_errors.rb:117:in 'Bundler.with_friendly_errors'
	from /Users/connor.shea/.rbenv/versions/3.4.2/lib/ruby/gems/3.4.0/gems/bundler-2.6.5/exe/bundle:20:in '<top (required)>'
	from /Users/connor.shea/.rbenv/versions/3.4.2/bin/bundle:25:in 'Kernel#load'
	from /Users/connor.shea/.rbenv/versions/3.4.2/bin/bundle:25:in '<main>'

2025-07-16 13:57:12.386 [info] (fifthasset-web) Finished booting Ruby LSP Rails server

If I fully remove the vendor directory in my rails app's repo, the issue is fixed. But then spinning up Docker will just recreate it again since it copies the files over. It may be that there are native extensions being copied over from the Linux-based Docker container to my local macOS filesystem, which is why this error occurs. Is there a way to force Ruby LSP to ignore the Rubocop version from the vendor/bundle directory?

Ruby LSP Information

VS Code Version

1.102.1

Ruby LSP Extension Version

0.9.30

Ruby LSP Server Version

0.25.0

Ruby LSP Add-ons

• Ruby LSP Rails (0.4.7)
• RuboCop (unknown)

Ruby Version

3.4.2

Ruby Version Manager

rbenv

Installed Extensions

Click to expand

• EditorConfig (0.17.4)
• connors-one-monokai (0.4.3)
• cpptools (1.26.3)
• formate (1.2.1)
• gitless (11.7.2)
• haml (1.4.1)
• project-manager (12.8.0)
• ruby-lsp (0.9.30)
• template-string-converter (0.6.1)
• test-adapter-converter (0.2.1)
• vscode-duplicate (1.2.1)
• vscode-eslint (3.0.10)
• vscode-open-in-github (1.3.6)
• vscode-rdbg (0.2.2)
• vscode-sort-json (1.20.0)
• vscode-test-explorer (2.22.1)
• vscode-test-explorer-status-bar (1.2.0)
• vscode-yaml (1.18.0)
• vsliveshare (1.0.5948)

Ruby LSP Settings

Click to expand

Workspace

{}

User

{
  "enabledFeatures": {
    "codeActions": true,
    "diagnostics": true,
    "documentHighlights": true,
    "documentLink": true,
    "documentSymbols": true,
    "foldingRanges": true,
    "formatting": true,
    "hover": true,
    "inlayHint": true,
    "onTypeFormatting": true,
    "selectionRanges": true,
    "semanticHighlighting": true,
    "completion": true,
    "codeLens": true,
    "definition": true,
    "workspaceSymbol": true,
    "signatureHelp": true,
    "typeHierarchy": true
  },
  "featuresConfiguration": {},
  "addonSettings": {},
  "rubyVersionManager": {
    "identifier": "rbenv"
  },
  "customRubyCommand": "",
  "formatter": "auto",
  "linters": null,
  "bundleGemfile": "",
  "testTimeout": 30,
  "branch": "",
  "pullDiagnosticsOn": "both",
  "useBundlerCompose": false,
  "bypassTypechecker": false,
  "rubyExecutablePath": "",
  "indexing": {},
  "erbSupport": true,
  "featureFlags": {},
  "sigOpacityLevel": "1"
}

[vinistock]

@connorshea I tried setting my bundle path to vendor/bundle, but I can't seem to reproduce. If you upgrade RuboCop to the latest version, does the issue persist?

[connorshea]

@connorshea I tried setting my bundle path to vendor/bundle, but I can't seem to reproduce. If you upgrade RuboCop to the latest version, does the issue persist?

Unfortunately, yes it does. It may be that it only happens if you don't intend to use vendor/bundle but have gems saved there? Because I don't use vendor/ for installing local gems, only gems inside docker. I think it's also plausible that it's a problem caused by having gems in vendor that are meant for linux, and not for local usage? I'm not sure if Rubocop actively uses any native extensions?

[vinistock]

Oh, you have gems installed in vendor/bundle, but your BUNDLE_PATH points elsewhere? If that's the case, then I know what the issue is.

[vinistock]

@connorshea if my understanding of the problem is correct, #3669 should fix it. Are you able to apply those changes locally and verify?

[connorshea]

I applied that change to the ruby-lsp gem locally and it fixed the problem! Thank you!! You just made the lives of me and a half dozen of my coworkers a bit easier :)

[vinistock]

I'm glad we figured it out! Thanks for taking the time to report the bug and give feedback.