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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 HotKey, reference main (a3cf60), with Swift 6.1 for macOS (SPM) on 30 Apr 2025 05:38:44 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: 4.61.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/soffes/HotKey.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/soffes/HotKey
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at a3cf605 Version 0.2.1
Cloned https://github.com/soffes/HotKey.git
Revision (git rev-parse @):
a3cf605d7a96f6ff50e04fcb6dea6e2613cfcbe4
SUCCESS checkout https://github.com/soffes/HotKey.git at main
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/soffes/HotKey.git
https://github.com/soffes/HotKey.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "HotKey",
  "name" : "HotKey",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "HotKey",
      "targets" : [
        "HotKey"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "HotKeyTests",
      "module_type" : "SwiftTarget",
      "name" : "HotKeyTests",
      "path" : "Tests/HotKeyTests",
      "sources" : [
        "KeyComboTests.swift",
        "ModifierFlagsTests.swift"
      ],
      "target_dependencies" : [
        "HotKey"
      ],
      "type" : "test"
    },
    {
      "c99name" : "HotKey",
      "module_type" : "SwiftTarget",
      "name" : "HotKey",
      "path" : "Sources/HotKey",
      "product_memberships" : [
        "HotKey"
      ],
      "sources" : [
        "HotKey.swift",
        "HotKeysController.swift",
        "Key.swift",
        "KeyCombo+System.swift",
        "KeyCombo.swift",
        "NSEventModifierFlags+HotKey.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
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 -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
[3/9] Compiling HotKey KeyCombo+System.swift
/Users/admin/builder/spi-builder-workspace/Sources/HotKey/KeyCombo+System.swift:38:32: warning: main actor-isolated property 'mainMenu' can not be referenced from a nonisolated context; this is an error in the Swift 6 language mode
 35 |     ///
 36 |     /// - returns: array of key combos
 37 |     public static func mainMenuKeyCombos() -> [KeyCombo] {
    |                        `- note: add '@MainActor' to make static method 'mainMenuKeyCombos()' part of global actor 'MainActor'
 38 |         guard let menu = NSApp.mainMenu else {
    |                                `- warning: main actor-isolated property 'mainMenu' can not be referenced from a nonisolated context; this is an error in the Swift 6 language mode
 39 |             return []
 40 |         }
/Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX15.4.sdk/System/Library/Frameworks/AppKit.framework/Headers/NSApplication.h:282:38: note: property declared here
280 | - (void)updateWindows;
281 |
282 | @property (nullable, strong) NSMenu *mainMenu;
    |                                      `- note: property declared here
283 |
284 | /**
/Users/admin/builder/spi-builder-workspace/Sources/HotKey/KeyCombo+System.swift:38:26: warning: main actor-isolated var 'NSApp' can not be referenced from a nonisolated context; this is an error in the Swift 6 language mode
 35 |     ///
 36 |     /// - returns: array of key combos
 37 |     public static func mainMenuKeyCombos() -> [KeyCombo] {
    |                        `- note: add '@MainActor' to make static method 'mainMenuKeyCombos()' part of global actor 'MainActor'
 38 |         guard let menu = NSApp.mainMenu else {
    |                          `- warning: main actor-isolated var 'NSApp' can not be referenced from a nonisolated context; this is an error in the Swift 6 language mode
 39 |             return []
 40 |         }
/Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX15.4.sdk/System/Library/Frameworks/AppKit.framework/Headers/NSApplication.h:191:58: note: var declared here
189 | @interface NSApplication : NSResponder <NSUserInterfaceValidations, NSMenuItemValidation, NSAccessibilityElement, NSAccessibility>
190 |
191 | APPKIT_EXTERN __kindof NSApplication * _Null_unspecified NSApp NS_SWIFT_UI_ACTOR;
    |                                                          `- note: var declared here
192 |
193 | @property (class, readonly, strong) __kindof NSApplication *sharedApplication;
[4/9] Compiling HotKey KeyCombo.swift
[5/9] Compiling HotKey Key.swift
[6/9] Compiling HotKey HotKeysController.swift
/Users/admin/builder/spi-builder-workspace/Sources/HotKey/HotKeysController.swift:23:13: warning: static property 'hotKeys' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 21 | 	// MARK: - Properties
 22 |
 23 | 	static var hotKeys = [UInt32: HotKeyBox]()
    |             |- warning: static property 'hotKeys' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |             |- note: convert 'hotKeys' to a 'let' constant to make 'Sendable' shared state immutable
    |             |- note: add '@MainActor' to make static property 'hotKeys' part of global actor 'MainActor'
    |             `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 24 | 	static private var hotKeysCount: UInt32 = 0
 25 |
/Users/admin/builder/spi-builder-workspace/Sources/HotKey/HotKeysController.swift:24:21: warning: static property 'hotKeysCount' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 22 |
 23 | 	static var hotKeys = [UInt32: HotKeyBox]()
 24 | 	static private var hotKeysCount: UInt32 = 0
    |                     |- warning: static property 'hotKeysCount' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |                     |- note: convert 'hotKeysCount' to a 'let' constant to make 'Sendable' shared state immutable
    |                     |- note: add '@MainActor' to make static property 'hotKeysCount' part of global actor 'MainActor'
    |                     `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 25 |
 26 | 	static let eventHotKeySignature: UInt32 = {
/Users/admin/builder/spi-builder-workspace/Sources/HotKey/HotKeysController.swift:40:21: warning: static property 'eventHandler' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 38 | 	]
 39 |
 40 | 	private static var eventHandler: EventHandlerRef?
    |                     |- warning: static property 'eventHandler' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |                     |- note: convert 'eventHandler' to a 'let' constant to make 'Sendable' shared state immutable
    |                     |- note: add '@MainActor' to make static property 'eventHandler' part of global actor 'MainActor'
    |                     `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 41 |
 42 | 	// MARK: - Registration
[7/9] Emitting module HotKey
/Users/admin/builder/spi-builder-workspace/Sources/HotKey/HotKeysController.swift:23:13: warning: static property 'hotKeys' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 21 | 	// MARK: - Properties
 22 |
 23 | 	static var hotKeys = [UInt32: HotKeyBox]()
    |             |- warning: static property 'hotKeys' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |             |- note: convert 'hotKeys' to a 'let' constant to make 'Sendable' shared state immutable
    |             |- note: add '@MainActor' to make static property 'hotKeys' part of global actor 'MainActor'
    |             `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 24 | 	static private var hotKeysCount: UInt32 = 0
 25 |
/Users/admin/builder/spi-builder-workspace/Sources/HotKey/HotKeysController.swift:24:21: warning: static property 'hotKeysCount' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 22 |
 23 | 	static var hotKeys = [UInt32: HotKeyBox]()
 24 | 	static private var hotKeysCount: UInt32 = 0
    |                     |- warning: static property 'hotKeysCount' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |                     |- note: convert 'hotKeysCount' to a 'let' constant to make 'Sendable' shared state immutable
    |                     |- note: add '@MainActor' to make static property 'hotKeysCount' part of global actor 'MainActor'
    |                     `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 25 |
 26 | 	static let eventHotKeySignature: UInt32 = {
/Users/admin/builder/spi-builder-workspace/Sources/HotKey/HotKeysController.swift:40:21: warning: static property 'eventHandler' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 38 | 	]
 39 |
 40 | 	private static var eventHandler: EventHandlerRef?
    |                     |- warning: static property 'eventHandler' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |                     |- note: convert 'eventHandler' to a 'let' constant to make 'Sendable' shared state immutable
    |                     |- note: add '@MainActor' to make static property 'eventHandler' part of global actor 'MainActor'
    |                     `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 41 |
 42 | 	// MARK: - Registration
/Users/admin/builder/spi-builder-workspace/Sources/HotKey/NSEventModifierFlags+HotKey.swift:49:1: warning: extension declares a conformance of imported type 'ModifierFlags' to imported protocol 'CustomStringConvertible'; this will not behave correctly if the owners of 'AppKit' introduce this conformance in the future
47 | }
48 |
49 | extension NSEvent.ModifierFlags: CustomStringConvertible {
   | |- warning: extension declares a conformance of imported type 'ModifierFlags' to imported protocol 'CustomStringConvertible'; this will not behave correctly if the owners of 'AppKit' introduce this conformance in the future
   | `- note: add '@retroactive' to silence this warning
50 |     public var description: String {
51 |         var output = ""
[8/9] Compiling HotKey NSEventModifierFlags+HotKey.swift
/Users/admin/builder/spi-builder-workspace/Sources/HotKey/NSEventModifierFlags+HotKey.swift:49:1: warning: extension declares a conformance of imported type 'ModifierFlags' to imported protocol 'CustomStringConvertible'; this will not behave correctly if the owners of 'AppKit' introduce this conformance in the future
47 | }
48 |
49 | extension NSEvent.ModifierFlags: CustomStringConvertible {
   | |- warning: extension declares a conformance of imported type 'ModifierFlags' to imported protocol 'CustomStringConvertible'; this will not behave correctly if the owners of 'AppKit' introduce this conformance in the future
   | `- note: add '@retroactive' to silence this warning
50 |     public var description: String {
51 |         var output = ""
[9/9] Compiling HotKey HotKey.swift
Build complete! (7.27s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "HotKey",
  "name" : "HotKey",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "HotKey",
      "targets" : [
        "HotKey"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "HotKeyTests",
      "module_type" : "SwiftTarget",
      "name" : "HotKeyTests",
      "path" : "Tests/HotKeyTests",
      "sources" : [
        "KeyComboTests.swift",
        "ModifierFlagsTests.swift"
      ],
      "target_dependencies" : [
        "HotKey"
      ],
      "type" : "test"
    },
    {
      "c99name" : "HotKey",
      "module_type" : "SwiftTarget",
      "name" : "HotKey",
      "path" : "Sources/HotKey",
      "product_memberships" : [
        "HotKey"
      ],
      "sources" : [
        "HotKey.swift",
        "HotKeysController.swift",
        "Key.swift",
        "KeyCombo+System.swift",
        "KeyCombo.swift",
        "NSEventModifierFlags+HotKey.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Done.