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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 RVS_Persistent_Prefs, reference 1.3.10 (78812d), with Swift 6.0 for macOS (SPM) on 5 Nov 2024 14:05:43 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/RiftValleySoftware/RVS_PersistentPrefs.git
Reference: 1.3.10
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/RiftValleySoftware/RVS_PersistentPrefs
 * tag               1.3.10     -> FETCH_HEAD
HEAD is now at 78812d2 Added a cache, to reduce the number of times the defaults are loaded (It's a memory-intensive operation).
Cloned https://github.com/RiftValleySoftware/RVS_PersistentPrefs.git
Revision (git rev-parse @):
78812d207ea36b722647503d1944a67100993570
SUCCESS checkout https://github.com/RiftValleySoftware/RVS_PersistentPrefs.git at 1.3.10
========================================
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": "rvs_persistentprefs",
      "name": "RVS_Persistent_Prefs",
      "url": "https://github.com/RiftValleySoftware/RVS_PersistentPrefs.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/RVS_PersistentPrefs",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/RiftValleySoftware/RVS_PersistentPrefs.git
[1/2212] Fetching rvs_persistentprefs
Fetched https://github.com/RiftValleySoftware/RVS_PersistentPrefs.git from cache (1.73s)
Creating working copy for https://github.com/RiftValleySoftware/RVS_PersistentPrefs.git
Working copy of https://github.com/RiftValleySoftware/RVS_PersistentPrefs.git resolved at 1.3.10 (78812d2)
warning: '.resolve-product-dependencies': dependency 'rvs_persistentprefs' 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/RiftValleySoftware/RVS_PersistentPrefs.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] Compiling RVS_Persistent_Prefs RVS_PersistentPrefs.swift
/Users/admin/builder/spi-builder-workspace/Sources/RVS_Persistent_Prefs/RVS_PersistentPrefs.swift:47:24: warning: static property '_cache' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 45 |      The first key is the general prefs key, and the second key is each prefs key.
 46 |      */
 47 |     private static var _cache: [String: [String: Any]] = [:]
    |                        |- warning: static property '_cache' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |                        |- note: convert '_cache' to a 'let' constant to make 'Sendable' shared state immutable
    |                        |- note: annotate '_cache' 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
 48 |
 49 |     /* ################################################################## */
[4/4] Emitting module RVS_Persistent_Prefs
/Users/admin/builder/spi-builder-workspace/Sources/RVS_Persistent_Prefs/RVS_PersistentPrefs.swift:47:24: warning: static property '_cache' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 45 |      The first key is the general prefs key, and the second key is each prefs key.
 46 |      */
 47 |     private static var _cache: [String: [String: Any]] = [:]
    |                        |- warning: static property '_cache' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |                        |- note: convert '_cache' to a 'let' constant to make 'Sendable' shared state immutable
    |                        |- note: annotate '_cache' 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
 48 |
 49 |     /* ################################################################## */
Build complete! (5.95s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "RVS_Persistent_Prefs",
  "name" : "RVS_Persistent_Prefs",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "11.0"
    },
    {
      "name" : "tvos",
      "version" : "11.0"
    },
    {
      "name" : "macos",
      "version" : "10.14"
    },
    {
      "name" : "watchos",
      "version" : "5.0"
    }
  ],
  "products" : [
    {
      "name" : "RVS_Persistent_Prefs",
      "targets" : [
        "RVS_Persistent_Prefs"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "RVS_Persistent_PrefsTest",
      "module_type" : "SwiftTarget",
      "name" : "RVS_Persistent_PrefsTest",
      "path" : "Tests/RVS_Persistent_PrefsTest",
      "sources" : [
        "RVS_Persistent_Prefs_MixedType_Tests.swift",
        "RVS_Persistent_Prefs_Simple_Tests.swift",
        "RVS_Persistent_Prefs_Thread_Tests.swift"
      ],
      "target_dependencies" : [
        "RVS_Persistent_Prefs"
      ],
      "type" : "test"
    },
    {
      "c99name" : "RVS_Persistent_Prefs",
      "module_type" : "SwiftTarget",
      "name" : "RVS_Persistent_Prefs",
      "path" : "Sources/RVS_Persistent_Prefs",
      "product_memberships" : [
        "RVS_Persistent_Prefs"
      ],
      "sources" : [
        "RVS_PersistentPrefs.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.5"
}
Done.