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Track the adoption of Swift 6 strict concurrency checks for data race safety. How many packages are Ready for Swift 6?

Build Information

Successful build of Ross, reference main (83d299), with Swift 6.1 for macOS (SPM) on 27 Apr 2025 11:26:04 UTC.

Swift 6 data race errors: 0

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/gonzalonunez/ross.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/gonzalonunez/ross
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 83d299d Preserve header comments
Cloned https://github.com/gonzalonunez/ross.git
Revision (git rev-parse @):
83d299d66320639255ba866cebc01f542cc21996
SUCCESS checkout https://github.com/gonzalonunez/ross.git at main
Fetching https://github.com/apple/swift-syntax.git
Fetching https://github.com/apple/swift-argument-parser from cache
Fetched https://github.com/apple/swift-argument-parser from cache (0.70s)
[1/70233] Fetching swift-syntax
Fetched https://github.com/apple/swift-syntax.git from cache (3.21s)
Computing version for https://github.com/apple/swift-argument-parser
Computed https://github.com/apple/swift-argument-parser at 1.2.2 (3.85s)
Computing version for https://github.com/apple/swift-syntax.git
Computed https://github.com/apple/swift-syntax.git at 0.50800.0-SNAPSHOT-2022-12-29-a (0.66s)
Creating working copy for https://github.com/apple/swift-syntax.git
Working copy of https://github.com/apple/swift-syntax.git resolved at 0.50800.0-SNAPSHOT-2022-12-29-a
Creating working copy for https://github.com/apple/swift-argument-parser
Working copy of https://github.com/apple/swift-argument-parser resolved at 1.2.2
========================================
ResolveProductDependencies
========================================
Resolving dependencies ...
{
  "identity": ".resolve-product-dependencies",
  "name": "resolve-dependencies",
  "url": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "version": "unspecified",
  "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "dependencies": [
    {
      "identity": "ross",
      "name": "Ross",
      "url": "https://github.com/gonzalonunez/ross.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/ross",
      "dependencies": [
        {
          "identity": "swift-argument-parser",
          "name": "swift-argument-parser",
          "url": "https://github.com/apple/swift-argument-parser",
          "version": "1.5.0",
          "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/swift-argument-parser",
          "dependencies": [
          ]
        },
        {
          "identity": "swift-syntax",
          "name": "SwiftSyntax",
          "url": "https://github.com/apple/swift-syntax.git",
          "version": "0.50800.0-SNAPSHOT-2022-12-29-a",
          "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/swift-syntax",
          "dependencies": [
          ]
        }
      ]
    }
  ]
}
Fetching https://github.com/gonzalonunez/ross.git
[3/135] Fetching ross
Fetched https://github.com/gonzalonunez/ross.git from cache (0.58s)
Fetching https://github.com/apple/swift-argument-parser from cache
Fetching https://github.com/apple/swift-syntax.git from cache
Fetched https://github.com/apple/swift-syntax.git from cache (0.92s)
Fetched https://github.com/apple/swift-argument-parser from cache (0.92s)
Computing version for https://github.com/apple/swift-argument-parser
Computed https://github.com/apple/swift-argument-parser at 1.5.0 (1.40s)
Computing version for https://github.com/apple/swift-syntax.git
Computed https://github.com/apple/swift-syntax.git at 0.50800.0-SNAPSHOT-2022-12-29-a (0.03s)
Creating working copy for https://github.com/gonzalonunez/ross.git
Working copy of https://github.com/gonzalonunez/ross.git resolved at main (83d299d)
Creating working copy for https://github.com/apple/swift-syntax.git
Working copy of https://github.com/apple/swift-syntax.git resolved at 0.50800.0-SNAPSHOT-2022-12-29-a
Creating working copy for https://github.com/apple/swift-argument-parser
Working copy of https://github.com/apple/swift-argument-parser resolved at 1.5.0
Found 2 product dependencies
  - swift-argument-parser
  - SwiftSyntax
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/gonzalonunez/ross.git
https://github.com/gonzalonunez/ross.git
{
  "dependencies" : [
    {
      "identity" : "swift-argument-parser",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.2.2",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-argument-parser"
    },
    {
      "identity" : "swift-syntax",
      "requirement" : {
        "exact" : [
          "0.50800.0-SNAPSHOT-2022-12-29-a"
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-syntax.git"
    }
  ],
  "manifest_display_name" : "Ross",
  "name" : "Ross",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "12.0"
    }
  ],
  "products" : [
    {
      "name" : "ross",
      "targets" : [
        "ross"
      ],
      "type" : {
        "executable" : null
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ross",
      "module_type" : "SwiftTarget",
      "name" : "ross",
      "path" : "Sources/ross",
      "product_dependencies" : [
        "ArgumentParser",
        "SwiftParser",
        "SwiftSyntax"
      ],
      "product_memberships" : [
        "ross"
      ],
      "sources" : [
        "CommentRewriter.swift",
        "Ross.swift",
        "RossRunner.swift",
        "RossRunnerError.swift"
      ],
      "type" : "executable"
    },
    {
      "c99name" : "RossTests",
      "module_type" : "SwiftTarget",
      "name" : "RossTests",
      "path" : "Tests/RossTests",
      "sources" : [
        "RossTests.swift"
      ],
      "target_dependencies" : [
        "ross"
      ],
      "type" : "test"
    }
  ],
  "tools_version" : "5.6"
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures
[1/1] Compiling plugin GenerateManual
Building for debugging...
[1/16] Write sources
[6/16] Write ross-entitlement.plist
[8/16] Write swift-version-2F0A5646E1D333AE.txt
[10/57] Compiling ArgumentParserToolInfo ToolInfo.swift
[11/57] Emitting module ArgumentParserToolInfo
[12/95] Compiling ArgumentParser ArgumentHelp.swift
[13/95] Compiling ArgumentParser ArgumentVisibility.swift
[14/95] Compiling ArgumentParser CompletionKind.swift
[15/95] Compiling ArgumentParser Errors.swift
[16/95] Compiling ArgumentParser ParserError.swift
[17/99] Compiling ArgumentParser ArgumentSet.swift
[18/99] Compiling ArgumentParser CommandParser.swift
[19/99] Compiling ArgumentParser InputKey.swift
[20/99] Compiling ArgumentParser AsyncParsableCommand.swift
[21/99] Compiling ArgumentParser CommandConfiguration.swift
[22/99] Compiling ArgumentParser EnumerableFlag.swift
[23/99] Compiling ArgumentParser ExpressibleByArgument.swift
[24/99] Compiling SwiftSyntax Utils.swift
[25/99] Compiling ArgumentParser Parsed.swift
[26/99] Compiling ArgumentParser ParsedValues.swift
[27/99] Compiling ArgumentParser HelpGenerator.swift
[28/99] Compiling ArgumentParser MessageInfo.swift
[37/103] Emitting module ArgumentParser
[38/103] Compiling ArgumentParser Flag.swift
[39/103] Compiling ArgumentParser NameSpecification.swift
[40/103] Compiling ArgumentParser Option.swift
[41/103] Compiling ArgumentParser OptionGroup.swift
[42/103] Compiling ArgumentParser Platform.swift
[43/103] Compiling ArgumentParser SequenceExtensions.swift
[44/103] Compiling ArgumentParser StringExtensions.swift
[45/103] Compiling ArgumentParser Tree.swift
[46/103] Emitting module SwiftSyntax
[47/103] Compiling ArgumentParser ParsableArguments.swift
[48/103] Compiling ArgumentParser ParsableArgumentsValidation.swift
[49/103] Compiling ArgumentParser ParsableCommand.swift
[50/103] Compiling ArgumentParser ArgumentDecoder.swift
[51/103] Compiling ArgumentParser BashCompletionsGenerator.swift
[52/103] Compiling ArgumentParser CompletionsGenerator.swift
[53/103] Compiling ArgumentParser FishCompletionsGenerator.swift
[54/103] Compiling ArgumentParser ZshCompletionsGenerator.swift
[55/103] Compiling ArgumentParser Argument.swift
[56/103] Compiling ArgumentParser ArgumentDefinition.swift
[61/103] Compiling ArgumentParser SplitArguments.swift
[62/103] Compiling ArgumentParser DumpHelpGenerator.swift
[63/103] Compiling ArgumentParser HelpCommand.swift
[64/103] Compiling ArgumentParser InputOrigin.swift
[65/103] Compiling ArgumentParser Name.swift
[70/103] Compiling ArgumentParser UsageGenerator.swift
[71/103] Compiling ArgumentParser CollectionExtensions.swift
[88/103] Compiling SwiftSyntax SyntaxTypeNodes.swift
[96/103] Write Objects.LinkFileList
[97/103] Archiving libSwiftSyntax.a
[99/109] Compiling SwiftDiagnostics Message.swift
[100/109] Compiling SwiftDiagnostics Note.swift
[101/109] Compiling SwiftDiagnostics FixIt.swift
[102/109] Compiling SwiftDiagnostics Diagnostic.swift
[103/109] Compiling SwiftDiagnostics DiagnosticsFormatter.swift
[104/109] Emitting module SwiftDiagnostics
[105/136] Compiling SwiftParser SyntaxUtils.swift
[106/136] Compiling SwiftParser TokenConsumer.swift
[107/136] Compiling SwiftParser TokenPrecedence.swift
[108/138] Compiling SwiftParser LoopProgressCondition.swift
[109/138] Compiling SwiftParser Modifiers.swift
[110/138] Compiling SwiftParser Names.swift
[111/138] Emitting module SwiftParser
[112/138] Compiling SwiftParser DeclarationAttribute.swift
[113/138] Compiling SwiftParser DeclarationModifier.swift
[114/138] Compiling SwiftParser Attributes.swift
[115/138] Compiling SwiftParser Availability.swift
[116/138] Compiling SwiftParser CharacterInfo.swift
[117/138] Compiling SwiftParser Parser+Entry.swift
[118/138] Compiling SwiftParser TypeAttribute.swift
[119/138] Compiling SwiftParser TopLevel.swift
[120/138] Compiling SwiftParser TriviaParser.swift
[121/138] Compiling SwiftParser Types.swift
[122/138] Compiling SwiftParser RawTokenKindSubset.swift
[123/138] Compiling SwiftParser Recovery.swift
[124/138] Compiling SwiftParser Statements.swift
[125/138] Compiling SwiftParser Nominals.swift
[126/138] Compiling SwiftParser Parser.swift
[127/138] Compiling SwiftParser Patterns.swift
[128/138] Compiling SwiftParser Declarations.swift
[129/138] Compiling SwiftParser Directives.swift
[130/138] Compiling SwiftParser Expressions.swift
[131/138] Compiling SwiftParser Lexer.swift
[132/138] Compiling SwiftParser LexerDiagnosticMessages.swift
[133/138] Compiling SwiftParser Lookahead.swift
[133/138] Write Objects.LinkFileList
[134/138] Archiving libSwiftParser.a
[136/143] Compiling ross RossRunnerError.swift
[137/143] Compiling ross RossRunner.swift
/Users/admin/builder/spi-builder-workspace/Sources/ross/RossRunner.swift:43:23: warning: passing closure as a 'sending' parameter risks causing data races between code in the current task and concurrent execution of the closure; this is an error in the Swift 6 language mode
41 |           continue
42 |         }
43 |         group.addTask {
   |                       `- warning: passing closure as a 'sending' parameter risks causing data races between code in the current task and concurrent execution of the closure; this is an error in the Swift 6 language mode
44 |           let fileURL = directoryURL.appendingPathComponent(file)
45 |           try await cleanFile(at: fileURL)
   |                     `- note: closure captures 'self' which is accessible to code in the current task
46 |         }
47 |       }
[138/143] Compiling ross Ross.swift
[139/143] Emitting module ross
[140/143] Compiling ross CommentRewriter.swift
[140/143] Write Objects.LinkFileList
[141/143] Linking ross
[142/143] Applying ross
Build complete! (23.96s)
Build complete.
{
  "dependencies" : [
    {
      "identity" : "swift-argument-parser",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.2.2",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-argument-parser"
    },
    {
      "identity" : "swift-syntax",
      "requirement" : {
        "exact" : [
          "0.50800.0-SNAPSHOT-2022-12-29-a"
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-syntax.git"
    }
  ],
  "manifest_display_name" : "Ross",
  "name" : "Ross",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "12.0"
    }
  ],
  "products" : [
    {
      "name" : "ross",
      "targets" : [
        "ross"
      ],
      "type" : {
        "executable" : null
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ross",
      "module_type" : "SwiftTarget",
      "name" : "ross",
      "path" : "Sources/ross",
      "product_dependencies" : [
        "ArgumentParser",
        "SwiftParser",
        "SwiftSyntax"
      ],
      "product_memberships" : [
        "ross"
      ],
      "sources" : [
        "CommentRewriter.swift",
        "Ross.swift",
        "RossRunner.swift",
        "RossRunnerError.swift"
      ],
      "type" : "executable"
    },
    {
      "c99name" : "RossTests",
      "module_type" : "SwiftTarget",
      "name" : "RossTests",
      "path" : "Tests/RossTests",
      "sources" : [
        "RossTests.swift"
      ],
      "target_dependencies" : [
        "ross"
      ],
      "type" : "test"
    }
  ],
  "tools_version" : "5.6"
}
Done.