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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 ReviewKit, reference main (6cf791), with Swift 6.1 for macOS (SPM) on 28 Apr 2025 03:11:49 UTC.

Swift 6 data race errors: 3

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/FlineDev/ReviewKit.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/FlineDev/ReviewKit
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 6cf7911 Add basic CI check using current macOS runner
Cloned https://github.com/FlineDev/ReviewKit.git
Revision (git rev-parse @):
6cf7911ecf14ced415b12f50344f9a5a68049d2f
SUCCESS checkout https://github.com/FlineDev/ReviewKit.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": "reviewkit",
      "name": "ReviewKit",
      "url": "https://github.com/FlineDev/ReviewKit.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/ReviewKit",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/FlineDev/ReviewKit.git
[3/136] Fetching reviewkit
Fetched https://github.com/FlineDev/ReviewKit.git from cache (0.74s)
Creating working copy for https://github.com/FlineDev/ReviewKit.git
Working copy of https://github.com/FlineDev/ReviewKit.git resolved at main (6cf7911)
warning: '.resolve-product-dependencies': dependency 'reviewkit' 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/FlineDev/ReviewKit.git
https://github.com/FlineDev/ReviewKit.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "ReviewKit",
  "name" : "ReviewKit",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "12.0"
    },
    {
      "name" : "macos",
      "version" : "10.14"
    },
    {
      "name" : "maccatalyst",
      "version" : "14.0"
    },
    {
      "name" : "visionos",
      "version" : "1.0"
    }
  ],
  "products" : [
    {
      "name" : "ReviewKit",
      "targets" : [
        "ReviewKit"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ReviewKit",
      "module_type" : "SwiftTarget",
      "name" : "ReviewKit",
      "path" : "Sources/ReviewKit",
      "product_memberships" : [
        "ReviewKit"
      ],
      "sources" : [
        "PositiveEvent.swift",
        "ReviewCriteria.swift",
        "ReviewKit.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.9"
}
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
[3/6] Emitting module ReviewKit
/Users/admin/builder/spi-builder-workspace/Sources/ReviewKit/ReviewKit.swift:7:22: warning: static property 'criteria' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 5 | public enum ReviewKit {
 6 |    /// The minimum criteria to be met to request a review from a user.
 7 |    public static var criteria: ReviewCriteria = ReviewCriteria(minPositiveEventsWeight: 3, eventsExpireAfterDays: 14)
   |                      |- warning: static property 'criteria' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                      |- note: convert 'criteria' to a 'let' constant to make 'Sendable' shared state immutable
   |                      |- note: add '@MainActor' to make static property 'criteria' part of global actor 'MainActor'
   |                      `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 8 |
 9 |    /// Turns off the review request inside an `#if DEBUG`. On by default (for testing purposes).
/Users/admin/builder/spi-builder-workspace/Sources/ReviewKit/ReviewKit.swift:10:22: warning: static property 'enabledInDebugBuilds' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 8 |
 9 |    /// Turns off the review request inside an `#if DEBUG`. On by default (for testing purposes).
10 |    public static var enabledInDebugBuilds: Bool = true
   |                      |- warning: static property 'enabledInDebugBuilds' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                      |- note: convert 'enabledInDebugBuilds' to a 'let' constant to make 'Sendable' shared state immutable
   |                      |- note: add '@MainActor' to make static property 'enabledInDebugBuilds' part of global actor 'MainActor'
   |                      `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
11 |
12 |    /// Records a positive event and requests a review if the criteria are met. Use when a user has completed a workflow and is less likely to be annoyed.
/Users/admin/builder/spi-builder-workspace/Sources/ReviewKit/ReviewKit.swift:52:15: warning: static property 'positiveEvents' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
50 |    }
51 |
52 |    static var positiveEvents: [PositiveEvent] = UserDefaults.standard
   |               |- warning: static property 'positiveEvents' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |               |- note: convert 'positiveEvents' to a 'let' constant to make 'Sendable' shared state immutable
   |               |- note: add '@MainActor' to make static property 'positiveEvents' part of global actor 'MainActor'
   |               `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
53 |       .array(forKey: "ReviewKit.positiveEvents")?
54 |       .compactMap { $0 as? String }
[4/6] Compiling ReviewKit PositiveEvent.swift
[5/6] Compiling ReviewKit ReviewCriteria.swift
[6/6] Compiling ReviewKit ReviewKit.swift
/Users/admin/builder/spi-builder-workspace/Sources/ReviewKit/ReviewKit.swift:7:22: warning: static property 'criteria' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 5 | public enum ReviewKit {
 6 |    /// The minimum criteria to be met to request a review from a user.
 7 |    public static var criteria: ReviewCriteria = ReviewCriteria(minPositiveEventsWeight: 3, eventsExpireAfterDays: 14)
   |                      |- warning: static property 'criteria' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                      |- note: convert 'criteria' to a 'let' constant to make 'Sendable' shared state immutable
   |                      |- note: add '@MainActor' to make static property 'criteria' part of global actor 'MainActor'
   |                      `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 8 |
 9 |    /// Turns off the review request inside an `#if DEBUG`. On by default (for testing purposes).
/Users/admin/builder/spi-builder-workspace/Sources/ReviewKit/ReviewKit.swift:10:22: warning: static property 'enabledInDebugBuilds' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 8 |
 9 |    /// Turns off the review request inside an `#if DEBUG`. On by default (for testing purposes).
10 |    public static var enabledInDebugBuilds: Bool = true
   |                      |- warning: static property 'enabledInDebugBuilds' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                      |- note: convert 'enabledInDebugBuilds' to a 'let' constant to make 'Sendable' shared state immutable
   |                      |- note: add '@MainActor' to make static property 'enabledInDebugBuilds' part of global actor 'MainActor'
   |                      `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
11 |
12 |    /// Records a positive event and requests a review if the criteria are met. Use when a user has completed a workflow and is less likely to be annoyed.
/Users/admin/builder/spi-builder-workspace/Sources/ReviewKit/ReviewKit.swift:52:15: warning: static property 'positiveEvents' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
50 |    }
51 |
52 |    static var positiveEvents: [PositiveEvent] = UserDefaults.standard
   |               |- warning: static property 'positiveEvents' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |               |- note: convert 'positiveEvents' to a 'let' constant to make 'Sendable' shared state immutable
   |               |- note: add '@MainActor' to make static property 'positiveEvents' part of global actor 'MainActor'
   |               `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
53 |       .array(forKey: "ReviewKit.positiveEvents")?
54 |       .compactMap { $0 as? String }
Build complete! (7.32s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "ReviewKit",
  "name" : "ReviewKit",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "12.0"
    },
    {
      "name" : "macos",
      "version" : "10.14"
    },
    {
      "name" : "maccatalyst",
      "version" : "14.0"
    },
    {
      "name" : "visionos",
      "version" : "1.0"
    }
  ],
  "products" : [
    {
      "name" : "ReviewKit",
      "targets" : [
        "ReviewKit"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ReviewKit",
      "module_type" : "SwiftTarget",
      "name" : "ReviewKit",
      "path" : "Sources/ReviewKit",
      "product_memberships" : [
        "ReviewKit"
      ],
      "sources" : [
        "PositiveEvent.swift",
        "ReviewCriteria.swift",
        "ReviewKit.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.9"
}
Done.