`swiftlint analyze` llvm segmentation fault

[rgoldberg]

New Issue Checklist

• I've Updated SwiftLint to the latest version.
• I've searched for existing GitHub issues.

Bug Description

I get an llvm segmentation fault for the swiftlint analyze command below for the current HEAD of the main branch of mas (535562b304eb110700eb57f289317f7b5c41cb2d).

This is not a new problem, but I just got around to reporting it. The problem first occurred when I changed a Collection utility function to use a TaskGroup to operate on elements in parallel in commit 8c097a1a8248515ce81c88990a70f6495f180a15.

If you need any more information to replicate the exact scenario, please let me know.

Thanks for any help & for SwiftLint.

$ swiftlint analyze --strict --quiet --reporter relative-path --compiler-log-path =(xcodebuild -scheme mas -destination "platform=macOS,arch=arm64,variant=macos" 2>&1)
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
(decl_context: )(decl_context: )Stack dump:
0.	While performing cached IDE inspection if possible
1.	While performing cached IDE inspection in decl context:
    ---
    0xc3eea17c0 Module name=mas
      0xc50746008 FileUnit file="/mas/Sources/mas/Utilities/Collection.swift"
        0xc38958d18 ExtensionDecl line=14 base=Collection
          0xc38f4d490 AbstractFunctionDecl name=concurrentTransform(maxConcurrentTaskCount:_:) : (no type set)
    ---
2.	While evaluating request IDEInspectionSecondPassRequest(source_file "/mas/Sources/mas/Utilities/Collection.swift", )
3.	While IDE inspecting starting at /mas/Sources/mas/Utilities/Collection.swift:67:13
4.	While evaluating request TypeCheckASTNodeAtLocRequest(0xc446130a0 AbstractClosureExpr line=66 : () async throws -> (Int, T?), )
5.	While evaluating request TypeCheckASTNodeAtLocRequest(0xc44612d60 AbstractFunctionDecl name=addNextTask() : <Self, T where Self : Collection, T : Sendable, Self.Element : Sendable> () -> (), )
6.	While type-checking expression at [/mas/Sources/mas/Utilities/Collection.swift:66:6 - line:68:6] RangeText="group.addTask {
						(next.offset, try await transform(next.element))
					"
7.	While type-checking-target starting at /mas/Sources/mas/Utilities/Collection.swift:66:12
[1]    68272 segmentation fault  swiftlint analyze --strict --quiet --reporter relative-path  

Environment

• SwiftLint: 0.63.2
• Xcode: Xcode 26.3 / Build version 17C529
• Installation method: Homebrew Core
• Swift: swift-driver version: 1.127.15 Apple Swift version 6.2.4 (swiftlang-6.2.4.1.4 clang-1700.6.4.2) / Target: arm64-apple-macosx26.0
• macOS: 26.3.1 (a) (25D771280a)
• Configuration file:

#
# .swiftlint.yml
# mas
#
# SwiftLint 0.63.2
#
---
excluded:
- .build/
- .idea/
- .swiftpm/
- .vscode/
opt_in_rules:
- all
analyzer_rules:
- all
disabled_rules:
- closure_body_length
- contrasted_opening_brace
- cyclomatic_complexity
- explicit_acl
- explicit_enum_raw_value
- explicit_self
- explicit_top_level_acl
- explicit_type_interface
- file_header
- function_body_length
- large_tuple
- multiple_closures_with_trailing_closure
- no_extension_access_modifier
- no_grouping_extension
- no_magic_numbers
- prefixed_toplevel_constant
- strict_fileprivate
- type_body_length
attributes:
  always_on_line_above: ['@Flag', '@MainActor', '@OptionGroup', '@TaskLocal']
deployment_target:
  macOS_deployment_target: 13
  macOSApplicationExtension_deployment_target: 13
  iOS_deployment_target: 99
  iOSApplicationExtension_deployment_target: 99
  tvOS_deployment_target: 99
  tvOSApplicationExtension_deployment_target: 99
  watchOS_deployment_target: 99
  watchOSApplicationExtension_deployment_target: 99
file_length:
  ignore_comment_only_lines: true
  warning: 500
file_name:
  excluded: [Group.swift, InstalledApp+Spotlight.swift, Process.swift, User.swift]
file_types_order:
  order:
  - main_type
  - supporting_type
  - extension
  - preview_provider
  - library_content_provider
function_parameter_count:
  warning: 6
indentation_width:
  indentation_width: 2
  include_multiline_strings: false
line_length:
  ignores_multiline_strings: true
  ignores_regex_literals: true
modifier_order:
  preferred_modifier_order:
  - acl
  - setterACL
  - override
  - isolation
  - dynamic
  - mutators
  - lazy
  - final
  - required
  - convenience
  - typeMethods
  - owned
multiline_arguments:
  first_argument_location: next_line
non_optional_string_data_conversion:
  include_variables: true
number_separator:
  minimum_length: 6
opening_brace:
  ignore_multiline_statement_conditions: true
operator_usage_whitespace:
  skip_aligned_constants: false
prefer_key_path:
  restrict_to_standard_functions: false
private_over_fileprivate:
  validate_extensions: true
redundant_self:
  only_in_closures: false
redundant_type_annotation:
  consider_default_literal_types_redundant: true
trailing_comma:
  mandatory_comma: true
trailing_whitespace:
  ignores_comments: false
type_contents_order:
  order:
  - case
  - associated_type
  - type_alias
  - subtype
  - type_property
  - instance_property
  - ib_inspectable
  - ib_outlet
  - initializer
  - deinitializer
  - type_method
  - view_life_cycle_method
  - ib_action
  - subscript
  - other_method
unneeded_override:
  affect_initializers: true
unused_import:
  require_explicit_imports: true
  allowed_transitive_imports:
  - module: Darwin
    allowed_transitive_imports:
    - _DarwinFoundation1
    - _DarwinFoundation2
    - _DarwinFoundation3
  - module: Swift
    allowed_transitive_imports:
    - _Concurrency
    - _StringProcessing
vertical_whitespace_between_cases:
  separation: never

Are you using nested configurations?

No