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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 DynamicCodable, reference master (b90d87), with Swift 6.1 for macOS (SPM) on 26 Apr 2025 04:15:33 UTC.

Swift 6 data race errors: 1

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/sebastianpixel/dynamiccodable.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/sebastianpixel/dynamiccodable
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at b90d87f set swift tools version back to 5.2 due to github workflows
Cloned https://github.com/sebastianpixel/dynamiccodable.git
Revision (git rev-parse @):
b90d87fb3b84106eb99926f1fb2dc8bf382000b4
SUCCESS checkout https://github.com/sebastianpixel/dynamiccodable.git at master
========================================
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": "dynamiccodable",
      "name": "DynamicCodable",
      "url": "https://github.com/sebastianpixel/dynamiccodable.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/dynamiccodable",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/sebastianpixel/dynamiccodable.git
[1/199] Fetching dynamiccodable
Fetched https://github.com/sebastianpixel/dynamiccodable.git from cache (0.63s)
Creating working copy for https://github.com/sebastianpixel/dynamiccodable.git
Working copy of https://github.com/sebastianpixel/dynamiccodable.git resolved at master (b90d87f)
warning: '.resolve-product-dependencies': dependency 'dynamiccodable' 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/sebastianpixel/dynamiccodable.git
https://github.com/sebastianpixel/dynamiccodable.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "DynamicCodable",
  "name" : "DynamicCodable",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "DynamicCodable",
      "targets" : [
        "DynamicCodable"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "DynamicCodableTests",
      "module_type" : "SwiftTarget",
      "name" : "DynamicCodableTests",
      "path" : "Tests/DynamicCodableTests",
      "sources" : [
        "DynamicCodableTests.swift",
        "ExampleTypes.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "DynamicCodable"
      ],
      "type" : "test"
    },
    {
      "c99name" : "DynamicCodable",
      "module_type" : "SwiftTarget",
      "name" : "DynamicCodable",
      "path" : "Sources/DynamicCodable",
      "product_memberships" : [
        "DynamicCodable"
      ],
      "sources" : [
        "CustomCodingKey.swift",
        "DynamicCodable.swift",
        "DynamicDecodable.swift",
        "DynamicDecodableRegistry.swift",
        "DynamicEncodable.swift",
        "OptionalProtocol.swift",
        "TypeIdentifiable.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.2"
}
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
[3/10] Compiling DynamicCodable DynamicDecodableRegistry.swift
/Users/admin/builder/spi-builder-workspace/Sources/DynamicCodable/DynamicDecodableRegistry.swift:10:24: warning: static property 'types' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 8 |     }
 9 |
10 |     private static var types = [String: DynamicDecodable.Type]()
   |                        |- warning: static property 'types' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                        |- note: convert 'types' to a 'let' constant to make 'Sendable' shared state immutable
   |                        |- note: add '@MainActor' to make static property 'types' part of global actor 'MainActor'
   |                        `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
11 |
12 |     /// Register a type for dynamic decoding.
[4/10] Compiling DynamicCodable OptionalProtocol.swift
[5/10] Compiling DynamicCodable TypeIdentifiable.swift
[6/10] Compiling DynamicCodable CustomCodingKey.swift
[7/10] Compiling DynamicCodable DynamicDecodable.swift
[8/10] Compiling DynamicCodable DynamicCodable.swift
[9/10] Emitting module DynamicCodable
/Users/admin/builder/spi-builder-workspace/Sources/DynamicCodable/DynamicDecodableRegistry.swift:10:24: warning: static property 'types' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 8 |     }
 9 |
10 |     private static var types = [String: DynamicDecodable.Type]()
   |                        |- warning: static property 'types' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                        |- note: convert 'types' to a 'let' constant to make 'Sendable' shared state immutable
   |                        |- note: add '@MainActor' to make static property 'types' part of global actor 'MainActor'
   |                        `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
11 |
12 |     /// Register a type for dynamic decoding.
[10/10] Compiling DynamicCodable DynamicEncodable.swift
Build complete! (4.09s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "DynamicCodable",
  "name" : "DynamicCodable",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "DynamicCodable",
      "targets" : [
        "DynamicCodable"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "DynamicCodableTests",
      "module_type" : "SwiftTarget",
      "name" : "DynamicCodableTests",
      "path" : "Tests/DynamicCodableTests",
      "sources" : [
        "DynamicCodableTests.swift",
        "ExampleTypes.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "DynamicCodable"
      ],
      "type" : "test"
    },
    {
      "c99name" : "DynamicCodable",
      "module_type" : "SwiftTarget",
      "name" : "DynamicCodable",
      "path" : "Sources/DynamicCodable",
      "product_memberships" : [
        "DynamicCodable"
      ],
      "sources" : [
        "CustomCodingKey.swift",
        "DynamicCodable.swift",
        "DynamicDecodable.swift",
        "DynamicDecodableRegistry.swift",
        "DynamicEncodable.swift",
        "OptionalProtocol.swift",
        "TypeIdentifiable.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.2"
}
Done.