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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 ChaosTesting, reference v1.0.1 (a7523f), with Swift 6.1 for macOS (SPM) on 29 Apr 2025 16:42:20 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/ChaosTesting.git
Reference: v1.0.1
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/elegantchaos/ChaosTesting
 * tag               v1.0.1     -> FETCH_HEAD
HEAD is now at a7523f7 Added tests
Cloned https://github.com/elegantchaos/ChaosTesting.git
Revision (git rev-parse @):
a7523f7678b8a6b5b8edccb05330f32317413979
SUCCESS checkout https://github.com/elegantchaos/ChaosTesting.git at v1.0.1
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/elegantchaos/ChaosTesting.git
https://github.com/elegantchaos/ChaosTesting.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "ChaosTesting",
  "name" : "ChaosTesting",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "13.0"
    }
  ],
  "products" : [
    {
      "name" : "ChaosTesting",
      "targets" : [
        "ChaosTesting"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ChaosTestingTests",
      "module_type" : "SwiftTarget",
      "name" : "ChaosTestingTests",
      "path" : "Tests/ChaosTestingTests",
      "sources" : [
        "ChaosTestingTests.swift"
      ],
      "target_dependencies" : [
        "ChaosTesting"
      ],
      "type" : "test"
    },
    {
      "c99name" : "ChaosTesting",
      "module_type" : "SwiftTarget",
      "name" : "ChaosTesting",
      "path" : "Sources/ChaosTesting",
      "product_memberships" : [
        "ChaosTesting"
      ],
      "sources" : [
        "TestingSupport.swift",
        "URL+SystemPaths.swift"
      ],
      "type" : "library"
    }
  ],
  "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
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-2F0A5646E1D333AE.txt
[3/5] Compiling ChaosTesting URL+SystemPaths.swift
[4/5] Emitting module ChaosTesting
[5/5] Compiling ChaosTesting TestingSupport.swift
Build complete! (5.39s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "ChaosTesting",
  "name" : "ChaosTesting",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "13.0"
    }
  ],
  "products" : [
    {
      "name" : "ChaosTesting",
      "targets" : [
        "ChaosTesting"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ChaosTestingTests",
      "module_type" : "SwiftTarget",
      "name" : "ChaosTestingTests",
      "path" : "Tests/ChaosTestingTests",
      "sources" : [
        "ChaosTestingTests.swift"
      ],
      "target_dependencies" : [
        "ChaosTesting"
      ],
      "type" : "test"
    },
    {
      "c99name" : "ChaosTesting",
      "module_type" : "SwiftTarget",
      "name" : "ChaosTesting",
      "path" : "Sources/ChaosTesting",
      "product_memberships" : [
        "ChaosTesting"
      ],
      "sources" : [
        "TestingSupport.swift",
        "URL+SystemPaths.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "6.0"
}
Done.