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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 Inject, reference main (bd9f8a), with Swift 6.1 for macOS (SPM) on 27 Apr 2025 20:35:25 UTC.

Swift 6 data race errors: 2

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/rmichelberger/Inject.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/rmichelberger/Inject
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at bd9f8ae - fixed unit test, updated minimum macOS version to 10.15
Cloned https://github.com/rmichelberger/Inject.git
Revision (git rev-parse @):
bd9f8aedff2e2ea0f8eedfb4ea9f4304172e56ff
SUCCESS checkout https://github.com/rmichelberger/Inject.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": "inject",
      "name": "Inject",
      "url": "https://github.com/rmichelberger/Inject.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Inject",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/rmichelberger/Inject.git
[1/82] Fetching inject
Fetched https://github.com/rmichelberger/Inject.git from cache (0.62s)
Creating working copy for https://github.com/rmichelberger/Inject.git
Working copy of https://github.com/rmichelberger/Inject.git resolved at main (bd9f8ae)
warning: '.resolve-product-dependencies': dependency 'inject' is not used by any target
Found 0 product dependencies
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/rmichelberger/Inject.git
https://github.com/rmichelberger/Inject.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Inject",
  "name" : "Inject",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.15"
    },
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "tvos",
      "version" : "13.0"
    },
    {
      "name" : "watchos",
      "version" : "8.0"
    }
  ],
  "products" : [
    {
      "name" : "Inject",
      "targets" : [
        "Inject"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "InjectTests",
      "module_type" : "SwiftTarget",
      "name" : "InjectTests",
      "path" : "Tests/InjectTests",
      "sources" : [
        "InjectTests.swift"
      ],
      "target_dependencies" : [
        "Inject"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Inject",
      "module_type" : "SwiftTarget",
      "name" : "Inject",
      "path" : "Sources/Inject",
      "product_memberships" : [
        "Inject"
      ],
      "sources" : [
        "Inject.swift",
        "Singleton.swift",
        "ViewModel.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.5"
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-2F0A5646E1D333AE.txt
[3/6] Compiling Inject Singleton.swift
/Users/admin/builder/spi-builder-workspace/Sources/Inject/Singleton.swift:19:28: warning: static property 'container' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
17 |
18 | fileprivate struct SingletonContainer {
19 |     fileprivate static var container = [String: Any]()
   |                            |- warning: static property 'container' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                            |- note: convert 'container' to a 'let' constant to make 'Sendable' shared state immutable
   |                            |- note: add '@MainActor' to make static property 'container' part of global actor 'MainActor'
   |                            `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
20 | }
21 |
[4/6] Compiling Inject ViewModel.swift
[5/6] Compiling Inject Inject.swift
/Users/admin/builder/spi-builder-workspace/Sources/Inject/Inject.swift:26:16: warning: static property 'container' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
24 |
25 | fileprivate struct Provider {
26 |     static var container = [String: Any]()
   |                |- warning: static property 'container' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                |- note: convert 'container' to a 'let' constant to make 'Sendable' shared state immutable
   |                |- note: add '@MainActor' to make static property 'container' part of global actor 'MainActor'
   |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
27 | }
28 |
[6/6] Emitting module Inject
/Users/admin/builder/spi-builder-workspace/Sources/Inject/Inject.swift:26:16: warning: static property 'container' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
24 |
25 | fileprivate struct Provider {
26 |     static var container = [String: Any]()
   |                |- warning: static property 'container' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                |- note: convert 'container' to a 'let' constant to make 'Sendable' shared state immutable
   |                |- note: add '@MainActor' to make static property 'container' part of global actor 'MainActor'
   |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
27 | }
28 |
/Users/admin/builder/spi-builder-workspace/Sources/Inject/Singleton.swift:19:28: warning: static property 'container' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
17 |
18 | fileprivate struct SingletonContainer {
19 |     fileprivate static var container = [String: Any]()
   |                            |- warning: static property 'container' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                            |- note: convert 'container' to a 'let' constant to make 'Sendable' shared state immutable
   |                            |- note: add '@MainActor' to make static property 'container' part of global actor 'MainActor'
   |                            `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
20 | }
21 |
Build complete! (8.00s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Inject",
  "name" : "Inject",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.15"
    },
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "tvos",
      "version" : "13.0"
    },
    {
      "name" : "watchos",
      "version" : "8.0"
    }
  ],
  "products" : [
    {
      "name" : "Inject",
      "targets" : [
        "Inject"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "InjectTests",
      "module_type" : "SwiftTarget",
      "name" : "InjectTests",
      "path" : "Tests/InjectTests",
      "sources" : [
        "InjectTests.swift"
      ],
      "target_dependencies" : [
        "Inject"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Inject",
      "module_type" : "SwiftTarget",
      "name" : "Inject",
      "path" : "Sources/Inject",
      "product_memberships" : [
        "Inject"
      ],
      "sources" : [
        "Inject.swift",
        "Singleton.swift",
        "ViewModel.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.5"
}
Done.