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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 Either, reference 1.1.0 (6a8017), with Swift 6.1 for macOS (SPM) on 27 Apr 2025 08:08:18 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: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/RougeWare/Swift-Either.git
Reference: 1.1.0
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/RougeWare/Swift-Either
 * tag               1.1.0      -> FETCH_HEAD
HEAD is now at 6a80178 Merge branch 'feature/Sendable' into production
Cloned https://github.com/RougeWare/Swift-Either.git
Revision (git rev-parse @):
6a8017853da369892b08ec6f89dbe28cf3e92001
SUCCESS checkout https://github.com/RougeWare/Swift-Either.git at 1.1.0
========================================
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": "swift-either",
      "name": "Either",
      "url": "https://github.com/RougeWare/Swift-Either.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Swift-Either",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/RougeWare/Swift-Either.git
[3/101] Fetching swift-either
Fetched https://github.com/RougeWare/Swift-Either.git from cache (0.62s)
Creating working copy for https://github.com/RougeWare/Swift-Either.git
Working copy of https://github.com/RougeWare/Swift-Either.git resolved at 1.1.0 (6a80178)
warning: '.resolve-product-dependencies': dependency 'swift-either' is not used by any target
Found 0 product dependencies
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/RougeWare/Swift-Either.git
https://github.com/RougeWare/Swift-Either.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Either",
  "name" : "Either",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Either",
      "targets" : [
        "Either"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "EitherTests",
      "module_type" : "SwiftTarget",
      "name" : "EitherTests",
      "path" : "Tests/EitherTests",
      "sources" : [
        "Either + autoconformance Tests.swift",
        "Either + conversions Tests.swift",
        "Either + map Tests.swift",
        "Either + unwrapping Tests.swift",
        "testing conveniences.swift"
      ],
      "target_dependencies" : [
        "Either"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Either",
      "module_type" : "SwiftTarget",
      "name" : "Either",
      "path" : "Sources/Either",
      "product_memberships" : [
        "Either"
      ],
      "sources" : [
        "Either + autoconformance.swift",
        "Either + conversions.swift",
        "Either + map.swift",
        "Either + unwrapping.swift",
        "Either.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
[3/8] Compiling Either Either + map.swift
[4/8] Compiling Either Either.swift
[5/8] Compiling Either Either + unwrapping.swift
[6/8] Compiling Either Either + conversions.swift
[7/8] Compiling Either Either + autoconformance.swift
[8/8] Emitting module Either
Build complete! (4.74s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Either",
  "name" : "Either",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Either",
      "targets" : [
        "Either"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "EitherTests",
      "module_type" : "SwiftTarget",
      "name" : "EitherTests",
      "path" : "Tests/EitherTests",
      "sources" : [
        "Either + autoconformance Tests.swift",
        "Either + conversions Tests.swift",
        "Either + map Tests.swift",
        "Either + unwrapping Tests.swift",
        "testing conveniences.swift"
      ],
      "target_dependencies" : [
        "Either"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Either",
      "module_type" : "SwiftTarget",
      "name" : "Either",
      "path" : "Sources/Either",
      "product_memberships" : [
        "Either"
      ],
      "sources" : [
        "Either + autoconformance.swift",
        "Either + conversions.swift",
        "Either + map.swift",
        "Either + unwrapping.swift",
        "Either.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "6.0"
}
Done.