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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 Cancellor, reference main (67da3c), with Swift 6.0 for macOS (SPM) on 1 Nov 2024 13:06:17 UTC.

Swift 6 data race errors: 2

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.1.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete

Build Log

========================================
RunAll
========================================
Builder version: 4.56.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/icanzilb/Cancellor.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/icanzilb/Cancellor
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 67da3cf adding a single subscription method
Cloned https://github.com/icanzilb/Cancellor.git
Revision (git rev-parse @):
67da3cfa416cac9a52e4f8be20c9efcd1f3a7a86
SUCCESS checkout https://github.com/icanzilb/Cancellor.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": "cancellor",
      "name": "Cancellor",
      "url": "https://github.com/icanzilb/Cancellor.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Cancellor",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/icanzilb/Cancellor.git
[1/36] Fetching cancellor
Fetched https://github.com/icanzilb/Cancellor.git from cache (0.68s)
Creating working copy for https://github.com/icanzilb/Cancellor.git
Working copy of https://github.com/icanzilb/Cancellor.git resolved at main (67da3cf)
warning: '.resolve-product-dependencies': dependency 'cancellor' is not used by any target
Found 0 product dependencies
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $PWD
https://github.com/icanzilb/Cancellor.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.1.0.app xcrun 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--7754E27361AE5C74.txt
[3/4] Emitting module Cancellor
/Users/admin/builder/spi-builder-workspace/Sources/Cancellor/Cancellor.swift:44:24: warning: static property 'cancellablesLock' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
42 | @available(iOS 13.0, macOS 10.15, *)
43 | extension NSObject {
44 |     private static var cancellablesLock: os_unfair_lock_s = { os_unfair_lock_s() }()
   |                        |- warning: static property 'cancellablesLock' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                        |- note: convert 'cancellablesLock' to a 'let' constant to make 'Sendable' shared state immutable
   |                        |- note: annotate 'cancellablesLock' 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
45 |     private static var cancellablesKeyRawValue: UInt8 = 0
46 |
/Users/admin/builder/spi-builder-workspace/Sources/Cancellor/Cancellor.swift:45:24: warning: static property 'cancellablesKeyRawValue' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
43 | extension NSObject {
44 |     private static var cancellablesLock: os_unfair_lock_s = { os_unfair_lock_s() }()
45 |     private static var cancellablesKeyRawValue: UInt8 = 0
   |                        |- warning: static property 'cancellablesKeyRawValue' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                        |- note: convert 'cancellablesKeyRawValue' to a 'let' constant to make 'Sendable' shared state immutable
   |                        |- note: annotate 'cancellablesKeyRawValue' 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
46 |
47 |     fileprivate func addCancellables(_ cancellables: [AnyCancellable]) {
[4/4] Compiling Cancellor Cancellor.swift
/Users/admin/builder/spi-builder-workspace/Sources/Cancellor/Cancellor.swift:44:24: warning: static property 'cancellablesLock' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
42 | @available(iOS 13.0, macOS 10.15, *)
43 | extension NSObject {
44 |     private static var cancellablesLock: os_unfair_lock_s = { os_unfair_lock_s() }()
   |                        |- warning: static property 'cancellablesLock' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                        |- note: convert 'cancellablesLock' to a 'let' constant to make 'Sendable' shared state immutable
   |                        |- note: annotate 'cancellablesLock' 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
45 |     private static var cancellablesKeyRawValue: UInt8 = 0
46 |
/Users/admin/builder/spi-builder-workspace/Sources/Cancellor/Cancellor.swift:45:24: warning: static property 'cancellablesKeyRawValue' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
43 | extension NSObject {
44 |     private static var cancellablesLock: os_unfair_lock_s = { os_unfair_lock_s() }()
45 |     private static var cancellablesKeyRawValue: UInt8 = 0
   |                        |- warning: static property 'cancellablesKeyRawValue' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                        |- note: convert 'cancellablesKeyRawValue' to a 'let' constant to make 'Sendable' shared state immutable
   |                        |- note: annotate 'cancellablesKeyRawValue' 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
46 |
47 |     fileprivate func addCancellables(_ cancellables: [AnyCancellable]) {
Build complete! (7.26s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Cancellor",
  "name" : "Cancellor",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "macos",
      "version" : "10.15"
    }
  ],
  "products" : [
    {
      "name" : "Cancellor",
      "targets" : [
        "Cancellor"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "CancellorTests",
      "module_type" : "SwiftTarget",
      "name" : "CancellorTests",
      "path" : "Tests/CancellorTests",
      "sources" : [
        "CancellorTests.swift"
      ],
      "target_dependencies" : [
        "Cancellor"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Cancellor",
      "module_type" : "SwiftTarget",
      "name" : "Cancellor",
      "path" : "Sources/Cancellor",
      "product_memberships" : [
        "Cancellor"
      ],
      "sources" : [
        "Cancellor.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.3"
}
Done.