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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 SwiftMath, reference master (290394), with Swift 6.0 for macOS (SPM) on 18 Apr 2025 10:53:32 UTC.

Swift 6 data race errors: 1

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.2.0.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: 4.60.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/ShaftUI/SwiftMath.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/ShaftUI/SwiftMath
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 2903946 Enable web support
Cloned https://github.com/ShaftUI/SwiftMath.git
Revision (git rev-parse @):
29039462bcd88b9469041f2678b892d0dd7a4c6f
SUCCESS checkout https://github.com/ShaftUI/SwiftMath.git at master
========================================
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": "swiftmath",
      "name": "SwiftMath",
      "url": "https://github.com/ShaftUI/SwiftMath.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/SwiftMath",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/ShaftUI/SwiftMath.git
[1/773] Fetching swiftmath
Fetched https://github.com/ShaftUI/SwiftMath.git from cache (0.77s)
Creating working copy for https://github.com/ShaftUI/SwiftMath.git
Working copy of https://github.com/ShaftUI/SwiftMath.git resolved at master (2903946)
warning: '.resolve-product-dependencies': dependency 'swiftmath' is not used by any target
Found 0 product dependencies
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $PWD
https://github.com/ShaftUI/SwiftMath.git
https://github.com/ShaftUI/SwiftMath.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "SwiftMath",
  "name" : "SwiftMath",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "SwiftMath",
      "targets" : [
        "SwiftMath"
      ],
      "type" : {
        "library" : [
          "static"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SwiftMathTests",
      "module_type" : "SwiftTarget",
      "name" : "SwiftMathTests",
      "path" : "Tests/SwiftMathTests",
      "sources" : [
        "AngleTests.swift",
        "Matrix3x3Tests.swift",
        "Matrix4x4Tests.swift",
        "RectTests.swift",
        "Vector2Tests.swift",
        "XCTestManifests.swift",
        "functionsTests.swift"
      ],
      "target_dependencies" : [
        "SwiftMath"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SwiftMath",
      "module_type" : "SwiftTarget",
      "name" : "SwiftMath",
      "path" : ".",
      "product_memberships" : [
        "SwiftMath"
      ],
      "sources" : [
        "Sources/Angle.swift",
        "Sources/Matrix3x3+nosimd.swift",
        "Sources/Matrix3x3+simd.swift",
        "Sources/Matrix3x3.swift",
        "Sources/Matrix4x4+Extensions.swift",
        "Sources/Matrix4x4+nosimd.swift",
        "Sources/Matrix4x4+simd.swift",
        "Sources/Matrix4x4.swift",
        "Sources/Point.swift",
        "Sources/Rect.swift",
        "Sources/String+Math.swift",
        "Sources/Vector2+nosimd.swift",
        "Sources/Vector2+simd.swift",
        "Sources/Vector2.swift",
        "Sources/Vector3+nosimd.swift",
        "Sources/Vector3+simd.swift",
        "Sources/Vector3.swift",
        "Sources/Vector4+nosimd.swift",
        "Sources/Vector4+simd.swift",
        "Sources/Vector4.swift",
        "Sources/Vectorf+Components.swift",
        "Sources/easing.swift",
        "Sources/float3x3+Extensions.swift",
        "Sources/float4x4+Extensions.swift",
        "Sources/functions.swift",
        "Sources/platform.swift",
        "Sources/random.swift",
        "Sources/utils.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.3"
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.2.0.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
Building for debugging...
[0/4] Write sources
[1/4] Write swift-version-5BDAB9E9C0126B9D.txt
[3/31] Emitting module SwiftMath
/Users/admin/builder/spi-builder-workspace/Sources/Rect.swift:84:23: warning: static property 'zero' is not concurrency-safe because non-'Sendable' type 'Rect' may have shared mutable state; this is an error in the Swift 6 language mode
 52 | // - rect intersection
 53 | // - offset, scale
 54 | public struct Rect {
    |               `- note: consider making struct 'Rect' conform to the 'Sendable' protocol
 55 |     public var origin: Point
 56 |     // TODO: Gracefully handle negative size case or forbid it
    :
 82 |     }
 83 |
 84 |     public static let zero = Rect(origin: Point.zero, size: Vector2f.zero)
    |                       |- warning: static property 'zero' is not concurrency-safe because non-'Sendable' type 'Rect' may have shared mutable state; this is an error in the Swift 6 language mode
    |                       |- note: annotate 'zero' with '@MainActor' if property should only be accessed from the main actor
    |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 85 | }
 86 |
[4/33] Compiling SwiftMath random.swift
[5/33] Compiling SwiftMath utils.swift
[6/33] Compiling SwiftMath Angle.swift
[7/33] Compiling SwiftMath Matrix3x3+nosimd.swift
[8/33] Compiling SwiftMath Matrix3x3+simd.swift
[9/33] Compiling SwiftMath Matrix3x3.swift
[10/33] Compiling SwiftMath Matrix4x4+Extensions.swift
[11/33] Compiling SwiftMath Matrix4x4+nosimd.swift
[12/33] Compiling SwiftMath Matrix4x4+simd.swift
[13/33] Compiling SwiftMath Matrix4x4.swift
[14/33] Compiling SwiftMath Point.swift
[15/33] Compiling SwiftMath functions.swift
[16/33] Compiling SwiftMath platform.swift
[17/33] Compiling SwiftMath Vector2+simd.swift
[18/33] Compiling SwiftMath Vector2.swift
[19/33] Compiling SwiftMath Vector3+nosimd.swift
[20/33] Compiling SwiftMath Vector3+simd.swift
[21/33] Compiling SwiftMath Vector3.swift
[22/33] Compiling SwiftMath Vector4+nosimd.swift
[23/33] Compiling SwiftMath Vector4+simd.swift
[24/33] Compiling SwiftMath Vector4.swift
[25/33] Compiling SwiftMath Vectorf+Components.swift
[26/33] Compiling SwiftMath easing.swift
[27/33] Compiling SwiftMath float3x3+Extensions.swift
[28/33] Compiling SwiftMath float4x4+Extensions.swift
[29/33] Compiling SwiftMath Rect.swift
/Users/admin/builder/spi-builder-workspace/Sources/Rect.swift:84:23: warning: static property 'zero' is not concurrency-safe because non-'Sendable' type 'Rect' may have shared mutable state; this is an error in the Swift 6 language mode
 52 | // - rect intersection
 53 | // - offset, scale
 54 | public struct Rect {
    |               `- note: consider making struct 'Rect' conform to the 'Sendable' protocol
 55 |     public var origin: Point
 56 |     // TODO: Gracefully handle negative size case or forbid it
    :
 82 |     }
 83 |
 84 |     public static let zero = Rect(origin: Point.zero, size: Vector2f.zero)
    |                       |- warning: static property 'zero' is not concurrency-safe because non-'Sendable' type 'Rect' may have shared mutable state; this is an error in the Swift 6 language mode
    |                       |- note: annotate 'zero' with '@MainActor' if property should only be accessed from the main actor
    |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 85 | }
 86 |
[30/33] Compiling SwiftMath String+Math.swift
/Users/admin/builder/spi-builder-workspace/Sources/Rect.swift:84:23: warning: static property 'zero' is not concurrency-safe because non-'Sendable' type 'Rect' may have shared mutable state; this is an error in the Swift 6 language mode
 52 | // - rect intersection
 53 | // - offset, scale
 54 | public struct Rect {
    |               `- note: consider making struct 'Rect' conform to the 'Sendable' protocol
 55 |     public var origin: Point
 56 |     // TODO: Gracefully handle negative size case or forbid it
    :
 82 |     }
 83 |
 84 |     public static let zero = Rect(origin: Point.zero, size: Vector2f.zero)
    |                       |- warning: static property 'zero' is not concurrency-safe because non-'Sendable' type 'Rect' may have shared mutable state; this is an error in the Swift 6 language mode
    |                       |- note: annotate 'zero' with '@MainActor' if property should only be accessed from the main actor
    |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 85 | }
 86 |
[31/33] Compiling SwiftMath Vector2+nosimd.swift
/Users/admin/builder/spi-builder-workspace/Sources/Rect.swift:84:23: warning: static property 'zero' is not concurrency-safe because non-'Sendable' type 'Rect' may have shared mutable state; this is an error in the Swift 6 language mode
 52 | // - rect intersection
 53 | // - offset, scale
 54 | public struct Rect {
    |               `- note: consider making struct 'Rect' conform to the 'Sendable' protocol
 55 |     public var origin: Point
 56 |     // TODO: Gracefully handle negative size case or forbid it
    :
 82 |     }
 83 |
 84 |     public static let zero = Rect(origin: Point.zero, size: Vector2f.zero)
    |                       |- warning: static property 'zero' is not concurrency-safe because non-'Sendable' type 'Rect' may have shared mutable state; this is an error in the Swift 6 language mode
    |                       |- note: annotate 'zero' with '@MainActor' if property should only be accessed from the main actor
    |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 85 | }
 86 |
[31/33] Write Objects.LinkFileList
[32/33] Archiving libSwiftMath.a
Build complete! (13.56s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "SwiftMath",
  "name" : "SwiftMath",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "SwiftMath",
      "targets" : [
        "SwiftMath"
      ],
      "type" : {
        "library" : [
          "static"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SwiftMathTests",
      "module_type" : "SwiftTarget",
      "name" : "SwiftMathTests",
      "path" : "Tests/SwiftMathTests",
      "sources" : [
        "AngleTests.swift",
        "Matrix3x3Tests.swift",
        "Matrix4x4Tests.swift",
        "RectTests.swift",
        "Vector2Tests.swift",
        "XCTestManifests.swift",
        "functionsTests.swift"
      ],
      "target_dependencies" : [
        "SwiftMath"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SwiftMath",
      "module_type" : "SwiftTarget",
      "name" : "SwiftMath",
      "path" : ".",
      "product_memberships" : [
        "SwiftMath"
      ],
      "sources" : [
        "Sources/Angle.swift",
        "Sources/Matrix3x3+nosimd.swift",
        "Sources/Matrix3x3+simd.swift",
        "Sources/Matrix3x3.swift",
        "Sources/Matrix4x4+Extensions.swift",
        "Sources/Matrix4x4+nosimd.swift",
        "Sources/Matrix4x4+simd.swift",
        "Sources/Matrix4x4.swift",
        "Sources/Point.swift",
        "Sources/Rect.swift",
        "Sources/String+Math.swift",
        "Sources/Vector2+nosimd.swift",
        "Sources/Vector2+simd.swift",
        "Sources/Vector2.swift",
        "Sources/Vector3+nosimd.swift",
        "Sources/Vector3+simd.swift",
        "Sources/Vector3.swift",
        "Sources/Vector4+nosimd.swift",
        "Sources/Vector4+simd.swift",
        "Sources/Vector4.swift",
        "Sources/Vectorf+Components.swift",
        "Sources/easing.swift",
        "Sources/float3x3+Extensions.swift",
        "Sources/float4x4+Extensions.swift",
        "Sources/functions.swift",
        "Sources/platform.swift",
        "Sources/random.swift",
        "Sources/utils.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.3"
}
Done.