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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 HSObserver, reference 1.2.0 (e3e5be), with Swift 6.0 for macOS (SPM) on 1 Nov 2024 17:39:56 UTC.

Swift 6 data race errors: 1

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/ConfusedVorlon/HSObserver.git
Reference: 1.2.0
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/ConfusedVorlon/HSObserver
 * tag               1.2.0      -> FETCH_HEAD
HEAD is now at e3e5be5 Tidy up docs
Cloned https://github.com/ConfusedVorlon/HSObserver.git
Revision (git rev-parse @):
e3e5be504eae3d1f97adec90887a945f389de5ee
SUCCESS checkout https://github.com/ConfusedVorlon/HSObserver.git at 1.2.0
========================================
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": "hsobserver",
      "name": "HSObserver",
      "url": "https://github.com/ConfusedVorlon/HSObserver.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/HSObserver",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/ConfusedVorlon/HSObserver.git
[1/172] Fetching hsobserver
Fetched https://github.com/ConfusedVorlon/HSObserver.git from cache (0.65s)
Creating working copy for https://github.com/ConfusedVorlon/HSObserver.git
Working copy of https://github.com/ConfusedVorlon/HSObserver.git resolved at 1.2.0 (e3e5be5)
warning: '.resolve-product-dependencies': dependency 'hsobserver' 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/ConfusedVorlon/HSObserver.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
[3/8] Compiling HSObserver HSObserves.swift
[4/8] Compiling HSObserver NSNotification+HSObserver.swift
[5/8] Emitting module HSObserver
/Users/admin/builder/spi-builder-workspace/Sources/HSObserver/HSHasObservers.swift:20:13: warning: var 'observerKey' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
18 | }
19 |
20 | private var observerKey: Void?
   |             |- warning: var 'observerKey' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |             |- note: convert 'observerKey' to a 'let' constant to make 'Sendable' shared state immutable
   |             |- note: annotate 'observerKey' 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
21 | public extension HSHasObservers {
22 |     private func _getObservers() -> [HSObserves] {
[6/8] Compiling HSObserver HSObserver.swift
/Users/admin/builder/spi-builder-workspace/Sources/HSObserver/HSObserver.swift:92:86: warning: converting non-sendable function value to '@Sendable (Notification) -> Void' may introduce data races
 90 |                                                                               object: object,
 91 |                                                                               queue: queue,
 92 |                                                                               using: block)
    |                                                                                      `- warning: converting non-sendable function value to '@Sendable (Notification) -> Void' may introduce data races
 93 |                 notificationObservers.append(notificationObserver)
 94 |             }
[7/8] Compiling HSObserver HSHasObservers.swift
/Users/admin/builder/spi-builder-workspace/Sources/HSObserver/HSHasObservers.swift:20:13: warning: var 'observerKey' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
18 | }
19 |
20 | private var observerKey: Void?
   |             |- warning: var 'observerKey' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |             |- note: convert 'observerKey' to a 'let' constant to make 'Sendable' shared state immutable
   |             |- note: annotate 'observerKey' 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
21 | public extension HSHasObservers {
22 |     private func _getObservers() -> [HSObserves] {
[8/8] Compiling HSObserver HSKeyPathObserver.swift
Build complete! (7.73s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "HSObserver",
  "name" : "HSObserver",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "HSObserver",
      "targets" : [
        "HSObserver"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "HSObserverTests",
      "module_type" : "SwiftTarget",
      "name" : "HSObserverTests",
      "path" : "Tests/HSObserverTests",
      "sources" : [
        "HSObserverTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "HSObserver"
      ],
      "type" : "test"
    },
    {
      "c99name" : "HSObserver",
      "module_type" : "SwiftTarget",
      "name" : "HSObserver",
      "path" : "Sources/HSObserver",
      "product_memberships" : [
        "HSObserver"
      ],
      "sources" : [
        "HSHasObservers.swift",
        "HSKeyPathObserver.swift",
        "HSObserver.swift",
        "HSObserves.swift",
        "NSNotification+HSObserver.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.2"
}
Done.