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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 SwiftKSUID, reference main (b9a284), with Swift 6.1 for macOS (SPM) on 29 Apr 2025 13:17:35 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

Build Log

========================================
RunAll
========================================
Builder version: 4.61.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/toffaletti/swiftksuid.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/toffaletti/swiftksuid
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at b9a2844 add workflow and use FoundationEssentials (#1)
Cloned https://github.com/toffaletti/swiftksuid.git
Revision (git rev-parse @):
b9a284428f5db8543c27ff9b4d890eb100a780c0
SUCCESS checkout https://github.com/toffaletti/swiftksuid.git at main
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/toffaletti/swiftksuid.git
https://github.com/toffaletti/swiftksuid.git
{
  "dependencies" : [
    {
      "identity" : "package-benchmark",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.26.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/ordo-one/package-benchmark"
    }
  ],
  "manifest_display_name" : "SwiftKSUID",
  "name" : "SwiftKSUID",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "macos",
      "version" : "13.0"
    },
    {
      "name" : "maccatalyst",
      "version" : "13.0"
    },
    {
      "name" : "tvos",
      "version" : "13.0"
    },
    {
      "name" : "visionos",
      "version" : "1.0"
    },
    {
      "name" : "watchos",
      "version" : "6.0"
    }
  ],
  "products" : [
    {
      "name" : "SwiftKSUID",
      "targets" : [
        "SwiftKSUID"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "BenchmarkSwiftKSUID",
      "targets" : [
        "BenchmarkSwiftKSUID"
      ],
      "type" : {
        "executable" : null
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SwiftKSUIDTests",
      "module_type" : "SwiftTarget",
      "name" : "SwiftKSUIDTests",
      "path" : "Tests/SwiftKSUIDTests",
      "sources" : [
        "SwiftKSUIDTests.swift"
      ],
      "target_dependencies" : [
        "SwiftKSUID"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SwiftKSUID",
      "module_type" : "SwiftTarget",
      "name" : "SwiftKSUID",
      "path" : "Sources/SwiftKSUID",
      "product_memberships" : [
        "SwiftKSUID",
        "BenchmarkSwiftKSUID"
      ],
      "sources" : [
        "Base62.swift",
        "SwiftKSUID.swift"
      ],
      "type" : "library"
    },
    {
      "c99name" : "BenchmarkSwiftKSUID",
      "module_type" : "SwiftTarget",
      "name" : "BenchmarkSwiftKSUID",
      "path" : "Benchmarks/BenchmarkSwiftKSUID",
      "product_dependencies" : [
        "Benchmark",
        "BenchmarkPlugin"
      ],
      "product_memberships" : [
        "BenchmarkSwiftKSUID"
      ],
      "sources" : [
        "BenchmarkSwiftKSUID.swift"
      ],
      "target_dependencies" : [
        "SwiftKSUID"
      ],
      "type" : "executable"
    }
  ],
  "tools_version" : "6.0"
}
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
[0/10] Write sources
[1/10] Write BenchmarkBoilerplateGenerator-tool-entitlement.plist
[1/10] Write sources
[5/10] Compiling CSystem shims.c
[6/10] Write swift-version-2F0A5646E1D333AE.txt
[8/40] Compiling ArgumentParserToolInfo ToolInfo.swift
[9/40] Emitting module ArgumentParserToolInfo
[10/79] Compiling ArgumentParser NameSpecification.swift
[11/79] Compiling ArgumentParser Option.swift
[12/79] Compiling ArgumentParser OptionGroup.swift
[13/82] Compiling ArgumentParser Errors.swift
[14/82] Compiling ArgumentParser Flag.swift
[15/82] Compiling ArgumentParser HelpGenerator.swift
[16/82] Compiling ArgumentParser ZshCompletionsGenerator.swift
[17/82] Compiling ArgumentParser Argument.swift
[18/82] Compiling ArgumentParser ArgumentDefinition.swift
[19/82] Emitting module SystemPackage
[20/82] Compiling ArgumentParser BashCompletionsGenerator.swift
[21/82] Compiling ArgumentParser CompletionsGenerator.swift
[22/82] Compiling ArgumentParser FishCompletionsGenerator.swift
[23/82] Compiling SystemPackage Util+StringArray.swift
[24/82] Compiling SystemPackage Util.swift
[25/82] Compiling SystemPackage UtilConsumers.swift
[26/82] Compiling ArgumentParser ArgumentSet.swift
[27/82] Compiling ArgumentParser CommandParser.swift
[28/82] Compiling ArgumentParser InputKey.swift
[29/82] Compiling ArgumentParser ArgumentHelp.swift
[30/82] Compiling ArgumentParser ArgumentVisibility.swift
[31/82] Compiling ArgumentParser CompletionKind.swift
[32/82] Compiling ArgumentParser Parsed.swift
[33/82] Compiling ArgumentParser ParsedValues.swift
[34/82] Compiling ArgumentParser ParsableArguments.swift
[35/82] Compiling ArgumentParser AsyncParsableCommand.swift
[36/82] Compiling ArgumentParser InputOrigin.swift
[37/82] Compiling ArgumentParser Name.swift
[38/82] Compiling ArgumentParser ParsableArgumentsValidation.swift
[39/82] Compiling ArgumentParser ParsableCommand.swift
[40/82] Compiling ArgumentParser ArgumentDecoder.swift
[45/86] Emitting module ArgumentParser
[60/86] Compiling ArgumentParser Platform.swift
[61/86] Compiling ArgumentParser SequenceExtensions.swift
[62/86] Compiling ArgumentParser StringExtensions.swift
[63/86] Compiling ArgumentParser Tree.swift
[72/86] Compiling ArgumentParser ParserError.swift
[73/86] Compiling ArgumentParser SplitArguments.swift
[74/86] Compiling ArgumentParser DumpHelpGenerator.swift
[75/86] Compiling ArgumentParser HelpCommand.swift
[76/86] Compiling ArgumentParser CommandConfiguration.swift
[77/86] Compiling ArgumentParser CommandGroup.swift
[78/86] Compiling ArgumentParser EnumerableFlag.swift
[79/86] Compiling ArgumentParser ExpressibleByArgument.swift
[84/88] Emitting module BenchmarkBoilerplateGenerator
[85/88] Compiling BenchmarkBoilerplateGenerator BenchmarkBoilerplateGenerator.swift
[85/88] Write Objects.LinkFileList
[86/88] Linking BenchmarkBoilerplateGenerator-tool
[87/88] Applying BenchmarkBoilerplateGenerator-tool
[1/1] Compiling plugin BenchmarkPlugin
[2/2] Compiling plugin BenchmarkCommandPlugin
[3/3] Compiling plugin GenerateManual
Building for debugging...
[3/33] Write sources
[3/33] Write BenchmarkSwiftKSUID-entitlement.plist
[6/33] Write sources
[19/33] Compiling CSystem shims.c
[21/33] Compiling CDarwinOperatingSystemStats CDarwinOperatingSystemStats.c
[22/33] Compiling _NumericsShims _NumericsShims.c
[23/33] Compiling _AtomicsShims.c
[24/33] Compiling SwiftRuntimeHooks shims.c
[25/33] Write swift-version-2F0A5646E1D333AE.txt
[27/97] Emitting module Shared
[28/97] Compiling Shared Command+Helpers.swift
[29/97] Compiling RealModule Float80+Real.swift
[30/97] Compiling RealModule Real.swift
[31/98] Compiling RealModule Float16+Real.swift
[32/98] Compiling RealModule Float+Real.swift
[33/98] Compiling RealModule ElementaryFunctions.swift
[34/98] Compiling RealModule RealFunctions.swift
[35/98] Compiling RealModule AugmentedArithmetic.swift
[36/98] Compiling RealModule ApproximateEquality.swift
[37/98] Compiling RealModule AlgebraicField.swift
[38/98] Compiling RealModule Double+Real.swift
[39/98] Compiling Atomics UnsafeAtomic.swift
[40/98] Compiling Atomics UnsafeAtomicLazyReference.swift
[41/100] Compiling Atomics ManagedAtomic.swift
[42/100] Compiling Atomics ManagedAtomicLazyReference.swift
[43/100] Compiling Atomics AtomicMemoryOrderings.swift
[44/100] Compiling Atomics DoubleWord.swift
[45/100] Compiling SystemPackage FilePathComponents.swift
[46/100] Compiling SystemPackage FilePathParsing.swift
[47/100] Emitting module RealModule
[50/103] Write Objects.LinkFileList
[52/108] Compiling Atomics IntegerOperations.swift
[53/108] Compiling Atomics Unmanaged extensions.swift
[54/108] Compiling SystemPackage FilePath.swift
[55/108] Compiling SystemPackage FilePathComponentView.swift
[56/108] Compiling SystemPackage FileHelpers.swift
[57/108] Compiling SystemPackage FileOperations.swift
[58/108] Emitting module ArgumentParserToolInfo
[59/108] Compiling ArgumentParserToolInfo ToolInfo.swift
[62/108] Compiling SystemPackage Mocking.swift
[63/147] Compiling ArgumentParser BashCompletionsGenerator.swift
[64/147] Compiling ArgumentParser CompletionsGenerator.swift
[65/147] Compiling ArgumentParser FishCompletionsGenerator.swift
[65/147] Linking BenchmarkBoilerplateGenerator-tool
[67/147] Compiling ArgumentParser Name.swift
[68/147] Compiling ArgumentParser Parsed.swift
[69/147] Compiling ArgumentParser ParsedValues.swift
[70/147] Emitting module SystemPackage
[70/147] Generating plugin support files
[71/147] Write sources
[73/147] Compiling ArgumentParser Errors.swift
[74/147] Compiling ArgumentParser Flag.swift
[75/147] Compiling ArgumentParser InputOrigin.swift
[76/147] Compiling ArgumentParser ArgumentHelp.swift
[77/147] Compiling ArgumentParser ArgumentVisibility.swift
[78/147] Compiling ArgumentParser CompletionKind.swift
[79/147] Compiling ComplexModule Arithmetic.swift
[80/147] Compiling ComplexModule Differentiable.swift
[81/147] Emitting module ComplexModule
[82/147] Compiling ComplexModule Complex.swift
[83/147] Compiling ComplexModule ElementaryFunctions.swift
[84/147] Compiling ArgumentParser ArgumentDecoder.swift
[85/147] Compiling ArgumentParser HelpGenerator.swift
[86/147] Compiling ArgumentParser MessageInfo.swift
[87/147] Compiling ArgumentParser CommandGroup.swift
[88/147] Compiling ArgumentParser EnumerableFlag.swift
[89/147] Compiling ArgumentParser ExpressibleByArgument.swift
[90/147] Compiling ArgumentParser ParsableArguments.swift
[91/147] Compiling ArgumentParser ParsableArgumentsValidation.swift
[92/147] Compiling ArgumentParser ParsableCommand.swift
[93/147] Compiling ArgumentParser ZshCompletionsGenerator.swift
[94/147] Compiling ArgumentParser Argument.swift
[95/147] Compiling ArgumentParser CommandConfiguration.swift
[106/153] Emitting module Numerics
[107/153] Compiling Numerics Numerics.swift
[108/155] Emitting module ArgumentParser
[109/155] Emitting module Atomics
[110/155] Compiling ArgumentParser Platform.swift
[111/155] Compiling ArgumentParser SequenceExtensions.swift
[112/155] Compiling ArgumentParser StringExtensions.swift
[113/155] Compiling ArgumentParser Tree.swift
[132/155] Compiling ArgumentParser ParserError.swift
[133/155] Compiling ArgumentParser SplitArguments.swift
[134/155] Compiling ArgumentParser DumpHelpGenerator.swift
[135/155] Compiling ArgumentParser HelpCommand.swift
[136/155] Compiling ArgumentParser NameSpecification.swift
[137/155] Compiling ArgumentParser Option.swift
[138/155] Compiling ArgumentParser OptionGroup.swift
[139/155] Compiling ArgumentParser AsyncParsableCommand.swift
[140/155] Compiling ArgumentParser ArgumentDefinition.swift
[141/155] Compiling ArgumentParser ArgumentSet.swift
[142/155] Compiling ArgumentParser CommandParser.swift
[143/155] Compiling ArgumentParser InputKey.swift
[146/155] Compiling ArgumentParser UsageGenerator.swift
[147/155] Compiling ArgumentParser CollectionExtensions.swift
[148/155] Emitting module Histogram
[149/155] Compiling Histogram Histogram.swift
[150/155] Emitting module SwiftKSUID
[151/155] Compiling SwiftKSUID SwiftKSUID.swift
[152/155] Compiling SwiftKSUID Base62.swift
[153/183] Compiling Benchmark ARCStats.swift
[154/183] Compiling Benchmark ARCStatsProducer.swift
[155/183] Compiling Benchmark Benchmark+ConvenienceInitializers.swift
[156/186] Compiling Benchmark BenchmarkRunner.swift
[157/186] Compiling Benchmark BenchmarkThresholds+Defaults.swift
[158/186] Compiling Benchmark BenchmarkThresholds.swift
[159/186] Emitting module Benchmark
[160/186] Compiling Benchmark Blackhole.swift
[161/186] Compiling Benchmark Int+Extensions.swift
[162/186] Compiling Benchmark MallocStats+jemalloc-support.swift
[163/186] Compiling Benchmark ProgressElements.swift
[164/186] Compiling Benchmark Utilities.swift
[165/186] Compiling Benchmark Statistics.swift
[166/186] Compiling Benchmark Benchmark.swift
[167/186] Compiling Benchmark BenchmarkClock.swift
[168/186] Compiling Benchmark BenchmarkExecutor+Extensions.swift
[169/186] Compiling Benchmark OperatingSystemStatsProducer+Linux.swift
[170/186] Compiling Benchmark OutputSuppressor.swift
[171/186] Compiling Benchmark Progress.swift
[172/186] Compiling Benchmark lock.swift
[173/186] Compiling Benchmark OperatingSystemStats.swift
[174/186] Compiling Benchmark OperatingSystemStatsProducer+Darwin.swift
[175/186] Compiling Benchmark BenchmarkMetric.swift
[176/186] Compiling Benchmark BenchmarkResult.swift
[177/186] Compiling Benchmark BenchmarkRunner+ReadWrite.swift
[178/186] Compiling Benchmark MallocStats.swift
[179/186] Compiling Benchmark MallocStatsProducer+jemalloc.swift
[180/186] Compiling Benchmark NIOLock.swift
[181/186] Compiling Benchmark BenchmarkExecutor.swift
[182/186] Compiling Benchmark BenchmarkInternals.swift
[183/186] Compiling Benchmark BenchmarkMetric+Defaults.swift
[184/189] Compiling BenchmarkSwiftKSUID __BenchmarkBoilerplate.swift
[185/189] Emitting module BenchmarkSwiftKSUID
[186/189] Compiling BenchmarkSwiftKSUID BenchmarkSwiftKSUID.swift
[186/189] Write Objects.LinkFileList
[187/189] Linking BenchmarkSwiftKSUID
[188/189] Applying BenchmarkSwiftKSUID
Build complete! (26.91s)
Fetching https://github.com/ordo-one/package-benchmark
[1/5898] Fetching package-benchmark
Fetched https://github.com/ordo-one/package-benchmark from cache (1.09s)
Computing version for https://github.com/ordo-one/package-benchmark
warning: 'package-benchmark': Building for SPI@macOS, disabling Jemalloc
Computed https://github.com/ordo-one/package-benchmark at 1.29.2 (2.11s)
Fetching https://github.com/ordo-one/TextTable
Fetching https://github.com/HdrHistogram/hdrhistogram-swift
Fetching https://github.com/apple/swift-atomics from cache
Fetching https://github.com/apple/swift-system from cache
Fetching https://github.com/apple/swift-argument-parser from cache
[1/203] Fetching texttable
[135/805] Fetching texttable, hdrhistogram-swift
Fetched https://github.com/apple/swift-argument-parser from cache (0.64s)
Fetched https://github.com/HdrHistogram/hdrhistogram-swift from cache (0.83s)
Fetched https://github.com/apple/swift-atomics from cache (0.83s)
Fetched https://github.com/ordo-one/TextTable from cache (0.84s)
Fetched https://github.com/apple/swift-system from cache (0.85s)
Computing version for https://github.com/ordo-one/TextTable
Computed https://github.com/ordo-one/TextTable at 0.0.2 (1.47s)
Computing version for https://github.com/HdrHistogram/hdrhistogram-swift
Computed https://github.com/HdrHistogram/hdrhistogram-swift at 0.1.3 (0.57s)
Fetching https://github.com/apple/swift-numerics from cache
Fetched https://github.com/apple/swift-numerics from cache (0.42s)
Computing version for https://github.com/apple/swift-numerics
Computed https://github.com/apple/swift-numerics at 1.0.3 (1.02s)
Computing version for https://github.com/apple/swift-atomics
Computed https://github.com/apple/swift-atomics at 1.2.0 (0.49s)
Computing version for https://github.com/apple/swift-system
Computed https://github.com/apple/swift-system at 1.4.2 (0.47s)
Computing version for https://github.com/apple/swift-argument-parser
Computed https://github.com/apple/swift-argument-parser at 1.5.0 (0.51s)
Creating working copy for https://github.com/apple/swift-system
Working copy of https://github.com/apple/swift-system resolved at 1.4.2
Creating working copy for https://github.com/HdrHistogram/hdrhistogram-swift
Working copy of https://github.com/HdrHistogram/hdrhistogram-swift resolved at 0.1.3
Creating working copy for https://github.com/ordo-one/TextTable
Working copy of https://github.com/ordo-one/TextTable resolved at 0.0.2
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
Creating working copy for https://github.com/apple/swift-numerics
Working copy of https://github.com/apple/swift-numerics resolved at 1.0.3
Creating working copy for https://github.com/apple/swift-atomics
Working copy of https://github.com/apple/swift-atomics resolved at 1.2.0
Creating working copy for https://github.com/ordo-one/package-benchmark
Working copy of https://github.com/ordo-one/package-benchmark resolved at 1.29.2
warning: 'package-benchmark': Building for SPI@macOS, disabling Jemalloc
Build complete.
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  "platforms" : [
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        "SwiftKSUID"
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  "targets" : [
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      "c99name" : "SwiftKSUIDTests",
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      "sources" : [
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      "target_dependencies" : [
        "SwiftKSUID"
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    {
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      "module_type" : "SwiftTarget",
      "name" : "SwiftKSUID",
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  "tools_version" : "6.0"
}
Done.