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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 Once with Swift 6.0 for macOS (SPM).

Swift 6 data race errors: 5

Build Command

env DEVELOPER_DIR=/Applications/Xcode-15.3.0.app xcrun --toolchain org.swift.600202405261a swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete

Build Log

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RunAll
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Builder version: 4.40.0
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/luoxiu/Once.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/luoxiu/Once
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at b5fd7f6 fix badge
Cloned https://github.com/luoxiu/Once.git
Revision (git rev-parse @):
b5fd7f667344b691db55eba2ab9c7709fa4c5d96
SUCCESS checkout https://github.com/luoxiu/Once.git at master
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $workDir
https://github.com/luoxiu/Once.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-15.3.0.app xcrun --toolchain org.swift.600202405261a swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-6F35C1178C84523A.txt
[3/9] Compiling Once PersistentToken.swift
/Users/admin/builder/spi-builder-workspace/Sources/Once/PersistentToken.swift:13:24: warning: static property 'registry' is not concurrency-safe because non-'Sendable' type 'Atom<[String : PersistentToken]>' may have shared mutable state; this is an error in the Swift 6 language mode
 11 |     }
 12 |
 13 |     private static let registry = Atom<[String: PersistentToken]>(value: [:])
    |                        |- warning: static property 'registry' is not concurrency-safe because non-'Sendable' type 'Atom<[String : PersistentToken]>' may have shared mutable state; this is an error in the Swift 6 language mode
    |                        |- note: annotate 'registry' 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
 14 |     private static let isInitialized = Atom(value: false, lock: DispatchSemaphoreLock())
 15 |
/Users/admin/builder/spi-builder-workspace/Sources/Once/Atom.swift:3:13: note: generic class 'Atom' does not conform to the 'Sendable' protocol
  1 | import Foundation
  2 |
  3 | final class Atom<Value> {
    |             `- note: generic class 'Atom' does not conform to the 'Sendable' protocol
  4 |
  5 |     private let lock: NSLocking
/Users/admin/builder/spi-builder-workspace/Sources/Once/PersistentToken.swift:14:24: warning: static property 'isInitialized' is not concurrency-safe because non-'Sendable' type 'Atom<Bool>' may have shared mutable state; this is an error in the Swift 6 language mode
 12 |
 13 |     private static let registry = Atom<[String: PersistentToken]>(value: [:])
 14 |     private static let isInitialized = Atom(value: false, lock: DispatchSemaphoreLock())
    |                        |- warning: static property 'isInitialized' is not concurrency-safe because non-'Sendable' type 'Atom<Bool>' may have shared mutable state; this is an error in the Swift 6 language mode
    |                        |- note: annotate 'isInitialized' 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
 15 |
 16 |     private static var sessionStartDate = Date()
/Users/admin/builder/spi-builder-workspace/Sources/Once/Atom.swift:3:13: note: generic class 'Atom' does not conform to the 'Sendable' protocol
  1 | import Foundation
  2 |
  3 | final class Atom<Value> {
    |             `- note: generic class 'Atom' does not conform to the 'Sendable' protocol
  4 |
  5 |     private let lock: NSLocking
/Users/admin/builder/spi-builder-workspace/Sources/Once/PersistentToken.swift:16:24: warning: static property 'sessionStartDate' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
 14 |     private static let isInitialized = Atom(value: false, lock: DispatchSemaphoreLock())
 15 |
 16 |     private static var sessionStartDate = Date()
    |                        |- warning: static property 'sessionStartDate' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
    |                        |- note: convert 'sessionStartDate' to a 'let' constant to make 'Sendable' shared state immutable
    |                        |- note: annotate 'sessionStartDate' 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
 17 |     private static var versionUpdateDate: Date?
 18 |
/Users/admin/builder/spi-builder-workspace/Sources/Once/PersistentToken.swift:17:24: warning: static property 'versionUpdateDate' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
 15 |
 16 |     private static var sessionStartDate = Date()
 17 |     private static var versionUpdateDate: Date?
    |                        |- warning: static property 'versionUpdateDate' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
    |                        |- note: convert 'versionUpdateDate' to a 'let' constant to make 'Sendable' shared state immutable
    |                        |- note: annotate 'versionUpdateDate' 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
 18 |
 19 |     public let name: String
[4/9] Compiling Once TimesPredicate.swift
[5/9] Compiling Once Token.swift
/Users/admin/builder/spi-builder-workspace/Sources/Once/Token.swift:27:24: warning: static property 'registry' is not concurrency-safe because non-'Sendable' type 'Atom<[String : Token]>' may have shared mutable state; this is an error in the Swift 6 language mode
25 | extension Token {
26 |
27 |     private static let registry = Atom<[String: Token]>(value: [:])
   |                        |- warning: static property 'registry' is not concurrency-safe because non-'Sendable' type 'Atom<[String : Token]>' may have shared mutable state; this is an error in the Swift 6 language mode
   |                        |- note: annotate 'registry' 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
28 |
29 |     public static func makeStatic(
/Users/admin/builder/spi-builder-workspace/Sources/Once/Atom.swift:3:13: note: generic class 'Atom' does not conform to the 'Sendable' protocol
  1 | import Foundation
  2 |
  3 | final class Atom<Value> {
    |             `- note: generic class 'Atom' does not conform to the 'Sendable' protocol
  4 |
  5 |     private let lock: NSLocking
[6/9] Compiling Once Lock.swift
[7/9] Compiling Once Atom.swift
[8/9] Emitting module Once
/Users/admin/builder/spi-builder-workspace/Sources/Once/PersistentToken.swift:13:24: warning: static property 'registry' is not concurrency-safe because non-'Sendable' type 'Atom<[String : PersistentToken]>' may have shared mutable state; this is an error in the Swift 6 language mode
 11 |     }
 12 |
 13 |     private static let registry = Atom<[String: PersistentToken]>(value: [:])
    |                        |- warning: static property 'registry' is not concurrency-safe because non-'Sendable' type 'Atom<[String : PersistentToken]>' may have shared mutable state; this is an error in the Swift 6 language mode
    |                        |- note: annotate 'registry' 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
 14 |     private static let isInitialized = Atom(value: false, lock: DispatchSemaphoreLock())
 15 |
/Users/admin/builder/spi-builder-workspace/Sources/Once/Atom.swift:3:13: note: generic class 'Atom' does not conform to the 'Sendable' protocol
  1 | import Foundation
  2 |
  3 | final class Atom<Value> {
    |             `- note: generic class 'Atom' does not conform to the 'Sendable' protocol
  4 |
  5 |     private let lock: NSLocking
/Users/admin/builder/spi-builder-workspace/Sources/Once/PersistentToken.swift:14:24: warning: static property 'isInitialized' is not concurrency-safe because non-'Sendable' type 'Atom<Bool>' may have shared mutable state; this is an error in the Swift 6 language mode
 12 |
 13 |     private static let registry = Atom<[String: PersistentToken]>(value: [:])
 14 |     private static let isInitialized = Atom(value: false, lock: DispatchSemaphoreLock())
    |                        |- warning: static property 'isInitialized' is not concurrency-safe because non-'Sendable' type 'Atom<Bool>' may have shared mutable state; this is an error in the Swift 6 language mode
    |                        |- note: annotate 'isInitialized' 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
 15 |
 16 |     private static var sessionStartDate = Date()
/Users/admin/builder/spi-builder-workspace/Sources/Once/Atom.swift:3:13: note: generic class 'Atom' does not conform to the 'Sendable' protocol
  1 | import Foundation
  2 |
  3 | final class Atom<Value> {
    |             `- note: generic class 'Atom' does not conform to the 'Sendable' protocol
  4 |
  5 |     private let lock: NSLocking
/Users/admin/builder/spi-builder-workspace/Sources/Once/PersistentToken.swift:16:24: warning: static property 'sessionStartDate' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
 14 |     private static let isInitialized = Atom(value: false, lock: DispatchSemaphoreLock())
 15 |
 16 |     private static var sessionStartDate = Date()
    |                        |- warning: static property 'sessionStartDate' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
    |                        |- note: convert 'sessionStartDate' to a 'let' constant to make 'Sendable' shared state immutable
    |                        |- note: annotate 'sessionStartDate' 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
 17 |     private static var versionUpdateDate: Date?
 18 |
/Users/admin/builder/spi-builder-workspace/Sources/Once/PersistentToken.swift:17:24: warning: static property 'versionUpdateDate' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
 15 |
 16 |     private static var sessionStartDate = Date()
 17 |     private static var versionUpdateDate: Date?
    |                        |- warning: static property 'versionUpdateDate' is not concurrency-safe because it is non-isolated global shared mutable state; this is an error in the Swift 6 language mode
    |                        |- note: convert 'versionUpdateDate' to a 'let' constant to make 'Sendable' shared state immutable
    |                        |- note: annotate 'versionUpdateDate' 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
 18 |
 19 |     public let name: String
/Users/admin/builder/spi-builder-workspace/Sources/Once/Token.swift:27:24: warning: static property 'registry' is not concurrency-safe because non-'Sendable' type 'Atom<[String : Token]>' may have shared mutable state; this is an error in the Swift 6 language mode
25 | extension Token {
26 |
27 |     private static let registry = Atom<[String: Token]>(value: [:])
   |                        |- warning: static property 'registry' is not concurrency-safe because non-'Sendable' type 'Atom<[String : Token]>' may have shared mutable state; this is an error in the Swift 6 language mode
   |                        |- note: annotate 'registry' 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
28 |
29 |     public static func makeStatic(
/Users/admin/builder/spi-builder-workspace/Sources/Once/Atom.swift:3:13: note: generic class 'Atom' does not conform to the 'Sendable' protocol
  1 | import Foundation
  2 |
  3 | final class Atom<Value> {
    |             `- note: generic class 'Atom' does not conform to the 'Sendable' protocol
  4 |
  5 |     private let lock: NSLocking
[9/9] Compiling Once Scope.swift
Build complete! (18.31s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Once",
  "name" : "Once",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Once",
      "targets" : [
        "Once"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "OnceTests",
      "module_type" : "SwiftTarget",
      "name" : "OnceTests",
      "path" : "Tests/OnceTests",
      "sources" : [
        "PersistentTokenTests.swift",
        "TimesPredicateTests.swift",
        "TokenTests.swift",
        "Utils.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "Once"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Once",
      "module_type" : "SwiftTarget",
      "name" : "Once",
      "path" : "Sources/Once",
      "product_memberships" : [
        "Once"
      ],
      "sources" : [
        "Atom.swift",
        "Lock.swift",
        "PersistentToken.swift",
        "Scope.swift",
        "TimesPredicate.swift",
        "Token.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Done.
This is a staging environment. For live and up-to-date package information, visit swiftpackageindex.com.