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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 URLNavigator, reference master (00bd57), with Swift 6.1 for macOS (SPM) on 27 Apr 2025 16:09:23 UTC.

Swift 6 data race errors: 1

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: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/devxoul/URLNavigator.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/devxoul/URLNavigator
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 00bd578 Merge pull request #165 from devxoul/ci
Cloned https://github.com/devxoul/URLNavigator.git
Revision (git rev-parse @):
00bd578c30e9fcbcf1400f742dfa5a2e8050f16c
SUCCESS checkout https://github.com/devxoul/URLNavigator.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": "urlnavigator",
      "name": "URLNavigator",
      "url": "https://github.com/devxoul/URLNavigator.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/URLNavigator",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/devxoul/URLNavigator.git
[1/1805] Fetching urlnavigator
Fetched https://github.com/devxoul/URLNavigator.git from cache (0.83s)
Creating working copy for https://github.com/devxoul/URLNavigator.git
Working copy of https://github.com/devxoul/URLNavigator.git resolved at master (00bd578)
warning: '.resolve-product-dependencies': dependency 'urlnavigator' 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/devxoul/URLNavigator.git
https://github.com/devxoul/URLNavigator.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "URLNavigator",
  "name" : "URLNavigator",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "11.0"
    },
    {
      "name" : "tvos",
      "version" : "11.0"
    }
  ],
  "products" : [
    {
      "name" : "URLMatcher",
      "targets" : [
        "URLMatcher"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "URLNavigator",
      "targets" : [
        "URLNavigator"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "URLNavigatorTests",
      "module_type" : "SwiftTarget",
      "name" : "URLNavigatorTests",
      "path" : "Tests/URLNavigatorTests",
      "sources" : [
        "Fixtures.swift",
        "NavigatorDelegateTests.swift",
        "NavigatorTests.swift",
        "Stubs.swift",
        "TopMostViewControllerTests.swift"
      ],
      "target_dependencies" : [
        "URLNavigator"
      ],
      "type" : "test"
    },
    {
      "c99name" : "URLNavigator",
      "module_type" : "SwiftTarget",
      "name" : "URLNavigator",
      "path" : "Sources/URLNavigator",
      "product_memberships" : [
        "URLNavigator"
      ],
      "sources" : [
        "Navigator.swift",
        "NavigatorDelegate.swift",
        "NavigatorProtocol.swift",
        "UIViewController+TopMostViewController.swift",
        "UIViewControllerType.swift"
      ],
      "target_dependencies" : [
        "URLMatcher"
      ],
      "type" : "library"
    },
    {
      "c99name" : "URLMatcherTests",
      "module_type" : "SwiftTarget",
      "name" : "URLMatcherTests",
      "path" : "Tests/URLMatcherTests",
      "sources" : [
        "URLConvertibleTests.swift",
        "URLMatcherInternalTests.swift",
        "URLMatcherTests.swift",
        "URLPathComponentTests.swift"
      ],
      "target_dependencies" : [
        "URLMatcher"
      ],
      "type" : "test"
    },
    {
      "c99name" : "URLMatcher",
      "module_type" : "SwiftTarget",
      "name" : "URLMatcher",
      "path" : "Sources/URLMatcher",
      "product_memberships" : [
        "URLMatcher",
        "URLNavigator"
      ],
      "sources" : [
        "URLConvertible.swift",
        "URLMatchResult.swift",
        "URLMatcher.swift",
        "URLPatchComponentMatchResult.swift",
        "URLPathComponent.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.7.1"
}
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...
[0/3] Write sources
[2/3] Write swift-version-2F0A5646E1D333AE.txt
[4/9] Compiling URLMatcher URLPatchComponentMatchResult.swift
[5/9] Compiling URLMatcher URLPathComponent.swift
[6/9] Compiling URLMatcher URLMatcher.swift
<unknown>:0: note: a function type must be marked '@Sendable' to conform to 'Sendable'
/Users/admin/builder/spi-builder-workspace/Sources/URLMatcher/URLMatcher.swift:10:14: warning: static property 'defaultURLValueConverters' is not concurrency-safe because non-'Sendable' type '[String : URLMatcher.URLValueConverter]' (aka 'Dictionary<String, (Array<String>, Int) -> Optional<Any>>') may have shared mutable state; this is an error in the Swift 6 language mode
  8 |   public typealias URLValueConverter = (_ pathComponents: [String], _ index: Int) -> Any?
  9 |
 10 |   static let defaultURLValueConverters: [String: URLValueConverter] = [
    |              |- warning: static property 'defaultURLValueConverters' is not concurrency-safe because non-'Sendable' type '[String : URLMatcher.URLValueConverter]' (aka 'Dictionary<String, (Array<String>, Int) -> Optional<Any>>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: add '@MainActor' to make static property 'defaultURLValueConverters' part of global actor 'MainActor'
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 11 |     "string": { pathComponents, index in
 12 |       return pathComponents[index]
[7/9] Compiling URLMatcher URLConvertible.swift
[8/9] Compiling URLMatcher URLMatchResult.swift
[9/9] Emitting module URLMatcher
<unknown>:0: note: a function type must be marked '@Sendable' to conform to 'Sendable'
/Users/admin/builder/spi-builder-workspace/Sources/URLMatcher/URLMatcher.swift:10:14: warning: static property 'defaultURLValueConverters' is not concurrency-safe because non-'Sendable' type '[String : URLMatcher.URLValueConverter]' (aka 'Dictionary<String, (Array<String>, Int) -> Optional<Any>>') may have shared mutable state; this is an error in the Swift 6 language mode
  8 |   public typealias URLValueConverter = (_ pathComponents: [String], _ index: Int) -> Any?
  9 |
 10 |   static let defaultURLValueConverters: [String: URLValueConverter] = [
    |              |- warning: static property 'defaultURLValueConverters' is not concurrency-safe because non-'Sendable' type '[String : URLMatcher.URLValueConverter]' (aka 'Dictionary<String, (Array<String>, Int) -> Optional<Any>>') may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: add '@MainActor' to make static property 'defaultURLValueConverters' part of global actor 'MainActor'
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 11 |     "string": { pathComponents, index in
 12 |       return pathComponents[index]
[10/15] Compiling URLNavigator NavigatorDelegate.swift
[11/15] Compiling URLNavigator UIViewController+TopMostViewController.swift
[12/15] Compiling URLNavigator UIViewControllerType.swift
[13/15] Compiling URLNavigator NavigatorProtocol.swift
[14/15] Compiling URLNavigator Navigator.swift
[15/15] Emitting module URLNavigator
Build complete! (4.67s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "URLNavigator",
  "name" : "URLNavigator",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "11.0"
    },
    {
      "name" : "tvos",
      "version" : "11.0"
    }
  ],
  "products" : [
    {
      "name" : "URLMatcher",
      "targets" : [
        "URLMatcher"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "URLNavigator",
      "targets" : [
        "URLNavigator"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "URLNavigatorTests",
      "module_type" : "SwiftTarget",
      "name" : "URLNavigatorTests",
      "path" : "Tests/URLNavigatorTests",
      "sources" : [
        "Fixtures.swift",
        "NavigatorDelegateTests.swift",
        "NavigatorTests.swift",
        "Stubs.swift",
        "TopMostViewControllerTests.swift"
      ],
      "target_dependencies" : [
        "URLNavigator"
      ],
      "type" : "test"
    },
    {
      "c99name" : "URLNavigator",
      "module_type" : "SwiftTarget",
      "name" : "URLNavigator",
      "path" : "Sources/URLNavigator",
      "product_memberships" : [
        "URLNavigator"
      ],
      "sources" : [
        "Navigator.swift",
        "NavigatorDelegate.swift",
        "NavigatorProtocol.swift",
        "UIViewController+TopMostViewController.swift",
        "UIViewControllerType.swift"
      ],
      "target_dependencies" : [
        "URLMatcher"
      ],
      "type" : "library"
    },
    {
      "c99name" : "URLMatcherTests",
      "module_type" : "SwiftTarget",
      "name" : "URLMatcherTests",
      "path" : "Tests/URLMatcherTests",
      "sources" : [
        "URLConvertibleTests.swift",
        "URLMatcherInternalTests.swift",
        "URLMatcherTests.swift",
        "URLPathComponentTests.swift"
      ],
      "target_dependencies" : [
        "URLMatcher"
      ],
      "type" : "test"
    },
    {
      "c99name" : "URLMatcher",
      "module_type" : "SwiftTarget",
      "name" : "URLMatcher",
      "path" : "Sources/URLMatcher",
      "product_memberships" : [
        "URLMatcher",
        "URLNavigator"
      ],
      "sources" : [
        "URLConvertible.swift",
        "URLMatchResult.swift",
        "URLMatcher.swift",
        "URLPatchComponentMatchResult.swift",
        "URLPathComponent.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.7.1"
}
Done.