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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 Linux.

Swift 6 data race errors: 5

Build Command

bash -c docker run --rm -v "checkouts-4606859-1":/host -w "$workDir" registry.gitlab.com/finestructure/spi-images:basic-6.0-latest swift build --triple x86_64-unknown-linux-gnu -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 4.40.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/luoxiu/Once.git
Reference: master
Initialized empty Git repository in /host/spi-builder-workspace/.git/
hint: Using 'master' as the name for the initial branch. This default branch name
hint: is subject to change. To configure the initial branch name to use in all
hint: of your new repositories, which will suppress this warning, call:
hint:
hint: 	git config --global init.defaultBranch <name>
hint:
hint: Names commonly chosen instead of 'master' are 'main', 'trunk' and
hint: 'development'. The just-created branch can be renamed via this command:
hint:
hint: 	git branch -m <name>
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:         linux
Swift version:             6.0
Building package at path:  $workDir
https://github.com/luoxiu/Once.git
Running build ...
bash -c docker run --rm -v "checkouts-4606859-1":/host -w "$workDir" registry.gitlab.com/finestructure/spi-images:basic-6.0-latest swift build --triple x86_64-unknown-linux-gnu -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete 2>&1
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-24593BA9C3E375BF.txt
[3/9] Compiling Once TimesPredicate.swift
[4/9] Compiling Once Token.swift
/host/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(
/host/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
[5/9] Compiling Once PersistentToken.swift
/host/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 |
/host/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
/host/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()
/host/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
/host/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 |
/host/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
[6/9] Compiling Once Scope.swift
[7/9] Compiling Once Lock.swift
[8/9] Compiling Once Atom.swift
[9/9] Emitting module Once
/host/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 |
/host/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
/host/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()
/host/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
/host/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 |
/host/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
/host/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(
/host/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
Build complete! (8.16s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Once",
  "name" : "Once",
  "path" : "/host/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.