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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 SVGPath, reference main (dc4a66), with Swift 6.1 for macOS (SPM) on 1 May 2025 06:27:39 UTC.

Swift 6 data race errors: 2

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 -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: 4.61.2
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/nicklockwood/SVGPath.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/nicklockwood/SVGPath
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at dc4a664 Update for 1.1.6 release
Cloned https://github.com/nicklockwood/SVGPath.git
Revision (git rev-parse @):
dc4a664036221812d07b5216372ce61d331f890a
SUCCESS checkout https://github.com/nicklockwood/SVGPath.git at main
========================================
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": "svgpath",
      "name": "SVGPath",
      "url": "https://github.com/nicklockwood/SVGPath.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/SVGPath",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/nicklockwood/SVGPath.git
[1/197] Fetching svgpath
Fetched https://github.com/nicklockwood/SVGPath.git from cache (0.69s)
Creating working copy for https://github.com/nicklockwood/SVGPath.git
Working copy of https://github.com/nicklockwood/SVGPath.git resolved at main (dc4a664)
warning: '.resolve-product-dependencies': dependency 'svgpath' 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/nicklockwood/SVGPath.git
https://github.com/nicklockwood/SVGPath.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "SVGPath",
  "name" : "SVGPath",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "SVGPath",
      "targets" : [
        "SVGPath"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SVGPathTests",
      "module_type" : "SwiftTarget",
      "name" : "SVGPathTests",
      "path" : "Tests",
      "sources" : [
        "CGPathTests.swift",
        "MetadataTests.swift",
        "SVGPathTests.swift"
      ],
      "target_dependencies" : [
        "SVGPath"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SVGPath",
      "module_type" : "SwiftTarget",
      "name" : "SVGPath",
      "path" : "Sources",
      "product_memberships" : [
        "SVGPath"
      ],
      "sources" : [
        "SVGPath+CoreGraphics.swift",
        "SVGPath.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.1"
}
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 -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...
[0/2] Write sources
[1/2] Write swift-version-2F0A5646E1D333AE.txt
[3/5] Compiling SVGPath SVGPath.swift
/Users/admin/builder/spi-builder-workspace/Sources/SVGPath.swift:234:27: warning: static property 'default' is not concurrency-safe because non-'Sendable' type 'SVGPath.WriteOptions' may have shared mutable state; this is an error in the Swift 6 language mode
231 |     }
232 |
233 |     struct WriteOptions {
    |            `- note: consider making struct 'WriteOptions' conform to the 'Sendable' protocol
234 |         public static let `default` = Self()
    |                           |- warning: static property 'default' is not concurrency-safe because non-'Sendable' type 'SVGPath.WriteOptions' may have shared mutable state; this is an error in the Swift 6 language mode
    |                           |- note: add '@MainActor' to make static property 'default' part of global actor 'MainActor'
    |                           `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
235 |
236 |         public var prettyPrinted: Bool
/Users/admin/builder/spi-builder-workspace/Sources/SVGPath.swift:482:16: warning: static property 'zero' is not concurrency-safe because non-'Sendable' type 'SVGPoint' may have shared mutable state; this is an error in the Swift 6 language mode
470 | }
471 |
472 | public struct SVGPoint: Hashable {
    |               `- note: consider making struct 'SVGPoint' conform to the 'Sendable' protocol
473 |     public var x, y: Double
474 |
    :
480 |
481 | public extension SVGPoint {
482 |     static let zero = SVGPoint(x: 0, y: 0)
    |                |- warning: static property 'zero' is not concurrency-safe because non-'Sendable' type 'SVGPoint' may have shared mutable state; this is an error in the Swift 6 language mode
    |                |- note: add '@MainActor' to make static property 'zero' part of global actor 'MainActor'
    |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
483 |
484 |     static func + (lhs: SVGPoint, rhs: SVGPoint) -> SVGPoint {
[4/5] Compiling SVGPath SVGPath+CoreGraphics.swift
[5/5] Emitting module SVGPath
/Users/admin/builder/spi-builder-workspace/Sources/SVGPath.swift:234:27: warning: static property 'default' is not concurrency-safe because non-'Sendable' type 'SVGPath.WriteOptions' may have shared mutable state; this is an error in the Swift 6 language mode
231 |     }
232 |
233 |     struct WriteOptions {
    |            `- note: consider making struct 'WriteOptions' conform to the 'Sendable' protocol
234 |         public static let `default` = Self()
    |                           |- warning: static property 'default' is not concurrency-safe because non-'Sendable' type 'SVGPath.WriteOptions' may have shared mutable state; this is an error in the Swift 6 language mode
    |                           |- note: add '@MainActor' to make static property 'default' part of global actor 'MainActor'
    |                           `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
235 |
236 |         public var prettyPrinted: Bool
/Users/admin/builder/spi-builder-workspace/Sources/SVGPath.swift:482:16: warning: static property 'zero' is not concurrency-safe because non-'Sendable' type 'SVGPoint' may have shared mutable state; this is an error in the Swift 6 language mode
470 | }
471 |
472 | public struct SVGPoint: Hashable {
    |               `- note: consider making struct 'SVGPoint' conform to the 'Sendable' protocol
473 |     public var x, y: Double
474 |
    :
480 |
481 | public extension SVGPoint {
482 |     static let zero = SVGPoint(x: 0, y: 0)
    |                |- warning: static property 'zero' is not concurrency-safe because non-'Sendable' type 'SVGPoint' may have shared mutable state; this is an error in the Swift 6 language mode
    |                |- note: add '@MainActor' to make static property 'zero' part of global actor 'MainActor'
    |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
483 |
484 |     static func + (lhs: SVGPoint, rhs: SVGPoint) -> SVGPoint {
Build complete! (3.93s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "SVGPath",
  "name" : "SVGPath",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "SVGPath",
      "targets" : [
        "SVGPath"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SVGPathTests",
      "module_type" : "SwiftTarget",
      "name" : "SVGPathTests",
      "path" : "Tests",
      "sources" : [
        "CGPathTests.swift",
        "MetadataTests.swift",
        "SVGPathTests.swift"
      ],
      "target_dependencies" : [
        "SVGPath"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SVGPath",
      "module_type" : "SwiftTarget",
      "name" : "SVGPath",
      "path" : "Sources",
      "product_memberships" : [
        "SVGPath"
      ],
      "sources" : [
        "SVGPath+CoreGraphics.swift",
        "SVGPath.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.1"
}
Done.