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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 Versionator, reference main (aa8e54), with Swift 6.1 for macOS (SPM) on 29 Apr 2025 20:40:23 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/elegantchaos/Versionator.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/elegantchaos/Versionator
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at aa8e54f updated tests
Cloned https://github.com/elegantchaos/Versionator.git
Revision (git rev-parse @):
aa8e54f57fd69c5338c1a3583d3de284092c5b46
SUCCESS checkout https://github.com/elegantchaos/Versionator.git at main
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/elegantchaos/Versionator.git
https://github.com/elegantchaos/Versionator.git
{
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      "identity" : "runner",
      "requirement" : {
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          {
            "lower_bound" : "2.1.3",
            "upper_bound" : "3.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/elegantchaos/Runner.git"
    }
  ],
  "manifest_display_name" : "Versionator",
  "name" : "Versionator",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "12.0"
    }
  ],
  "products" : [
    {
      "name" : "VersionatorPlugin",
      "targets" : [
        "VersionatorPlugin"
      ],
      "type" : {
        "plugin" : null
      }
    },
    {
      "name" : "VersionatorTool",
      "targets" : [
        "VersionatorTool"
      ],
      "type" : {
        "executable" : null
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "VersionatorUtils",
      "module_type" : "SwiftTarget",
      "name" : "VersionatorUtils",
      "path" : "Sources/VersionatorUtils",
      "product_memberships" : [
        "VersionatorPlugin",
        "VersionatorTool"
      ],
      "sources" : [
        "String+AsyncSequence.swift"
      ],
      "type" : "library"
    },
    {
      "c99name" : "VersionatorTool",
      "module_type" : "SwiftTarget",
      "name" : "VersionatorTool",
      "path" : "Sources/VersionatorTool",
      "product_dependencies" : [
        "Runner"
      ],
      "product_memberships" : [
        "VersionatorPlugin",
        "VersionatorTool"
      ],
      "sources" : [
        "URL+SystemPaths.swift",
        "VersionatorTool.swift"
      ],
      "target_dependencies" : [
        "VersionatorUtils"
      ],
      "type" : "executable"
    },
    {
      "c99name" : "VersionatorTests",
      "module_type" : "SwiftTarget",
      "name" : "VersionatorTests",
      "path" : "Tests/VersionatorTests",
      "product_dependencies" : [
        "Runner"
      ],
      "resources" : [
        {
          "path" : "/Users/admin/builder/spi-builder-workspace/Tests/VersionatorTests/Resources/Example.git",
          "rule" : {
            "copy" : {
            }
          }
        },
        {
          "path" : "/Users/admin/builder/spi-builder-workspace/Tests/VersionatorTests/Resources/Example.out",
          "rule" : {
            "copy" : {
            }
          }
        }
      ],
      "sources" : [
        "TestingSupport.swift",
        "VersionatorTests.swift"
      ],
      "target_dependencies" : [
        "VersionatorTool",
        "VersionatorUtils"
      ],
      "type" : "test"
    },
    {
      "c99name" : "VersionatorPlugin",
      "module_type" : "PluginTarget",
      "name" : "VersionatorPlugin",
      "path" : "Plugins/VersionatorPlugin",
      "plugin_capability" : {
        "type" : "buildTool"
      },
      "product_memberships" : [
        "VersionatorPlugin"
      ],
      "sources" : [
        "plugin+Xcode.swift",
        "plugin.swift"
      ],
      "target_dependencies" : [
        "VersionatorTool"
      ],
      "type" : "plugin"
    }
  ],
  "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
[1/1] Compiling plugin VersionatorPlugin
Building for debugging...
[1/18] Write sources
[7/18] Write VersionatorTool-tool-entitlement.plist
[7/18] Write sources
[9/18] Write VersionatorTool-entitlement.plist
[11/18] Write swift-version-2F0A5646E1D333AE.txt
[13/30] Compiling ChaosByteStreams String+ByteStreams.swift
[14/30] Compiling VersionatorUtils String+AsyncSequence.swift
[15/30] Emitting module VersionatorUtils
[16/30] Emitting module ChaosByteStreams
[17/30] Compiling VersionatorUtils String+AsyncSequence.swift
[18/30] Compiling ChaosByteStreams Data+ByteStreams.swift
[19/30] Compiling ChaosByteStreams String+ByteStreams.swift
[20/30] Compiling ChaosByteStreams DataBuffer.swift
[21/30] Emitting module VersionatorUtils
[22/30] Compiling ChaosByteStreams Data+ByteStreams.swift
[23/30] Emitting module ChaosByteStreams
[24/30] Compiling ChaosByteStreams DataBuffer.swift
[25/44] Emitting module Runner
[26/44] Compiling Runner Runner.swift
[27/44] Compiling Runner URL+SystemPath.swift
[28/44] Compiling Runner Runner.swift
[29/44] Compiling Runner RunState.swift
[30/44] Compiling Runner Error.swift
[32/44] Compiling Runner Output.swift
[33/44] Compiling Runner Session.swift
[34/44] Compiling Runner RunState.swift
[35/44] Compiling Runner URL+SystemPath.swift
[36/44] Emitting module Runner
[37/44] Compiling Runner Output.swift
[38/44] Compiling Runner Session.swift
[39/50] Compiling VersionatorTool URL+SystemPaths.swift
[40/50] Emitting module VersionatorTool
[41/50] Compiling VersionatorTool VersionatorTool.swift
[41/50] Write Objects.LinkFileList
[43/50] Compiling VersionatorTool URL+SystemPaths.swift
[44/50] Compiling VersionatorTool VersionatorTool.swift
[45/50] Emitting module VersionatorTool
[45/50] Write Objects.LinkFileList
[46/50] Linking VersionatorTool-tool
[47/50] Applying VersionatorTool-tool
[48/50] Linking VersionatorTool
[49/50] Applying VersionatorTool
Build complete! (13.10s)
Fetching https://github.com/elegantchaos/Runner.git
[7/676] Fetching runner
Fetched https://github.com/elegantchaos/Runner.git from cache (0.83s)
Computing version for https://github.com/elegantchaos/Runner.git
Computed https://github.com/elegantchaos/Runner.git at 2.1.3 (1.32s)
Fetching https://github.com/elegantchaos/ChaosByteStreams
[1/116] Fetching chaosbytestreams
Fetched https://github.com/elegantchaos/ChaosByteStreams from cache (0.68s)
Computing version for https://github.com/elegantchaos/ChaosByteStreams
Computed https://github.com/elegantchaos/ChaosByteStreams at 1.0.6 (1.17s)
Creating working copy for https://github.com/elegantchaos/Runner.git
Working copy of https://github.com/elegantchaos/Runner.git resolved at 2.1.3
Creating working copy for https://github.com/elegantchaos/ChaosByteStreams
Working copy of https://github.com/elegantchaos/ChaosByteStreams resolved at 1.0.6
Build complete.
{
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    {
      "identity" : "runner",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "2.1.3",
            "upper_bound" : "3.0.0"
          }
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      "type" : "sourceControl",
      "url" : "https://github.com/elegantchaos/Runner.git"
    }
  ],
  "manifest_display_name" : "Versionator",
  "name" : "Versionator",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "12.0"
    }
  ],
  "products" : [
    {
      "name" : "VersionatorPlugin",
      "targets" : [
        "VersionatorPlugin"
      ],
      "type" : {
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    },
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      "name" : "VersionatorTool",
      "targets" : [
        "VersionatorTool"
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      "type" : {
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      }
    }
  ],
  "targets" : [
    {
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      "module_type" : "SwiftTarget",
      "name" : "VersionatorUtils",
      "path" : "Sources/VersionatorUtils",
      "product_memberships" : [
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        "VersionatorTool"
      ],
      "sources" : [
        "String+AsyncSequence.swift"
      ],
      "type" : "library"
    },
    {
      "c99name" : "VersionatorTool",
      "module_type" : "SwiftTarget",
      "name" : "VersionatorTool",
      "path" : "Sources/VersionatorTool",
      "product_dependencies" : [
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      ],
      "product_memberships" : [
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        "VersionatorTool"
      ],
      "sources" : [
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      "type" : "executable"
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      "module_type" : "SwiftTarget",
      "name" : "VersionatorTests",
      "path" : "Tests/VersionatorTests",
      "product_dependencies" : [
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        "plugin+Xcode.swift",
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  "tools_version" : "6.0"
}
Done.