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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 SwiftOxfordAPI, reference master (322df3), with Swift 6.1 for macOS (SPM) on 24 Apr 2025 13:02:40 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/maximbilan/SwiftOxfordAPI.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/maximbilan/SwiftOxfordAPI
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 322df3b Update README.md
Cloned https://github.com/maximbilan/SwiftOxfordAPI.git
Revision (git rev-parse @):
322df3b8601e871874993e124fa31d22c91217d1
SUCCESS checkout https://github.com/maximbilan/SwiftOxfordAPI.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": "swiftoxfordapi",
      "name": "SwiftOxfordAPI",
      "url": "https://github.com/maximbilan/SwiftOxfordAPI.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/SwiftOxfordAPI",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/maximbilan/SwiftOxfordAPI.git
[1/131] Fetching swiftoxfordapi
Fetched https://github.com/maximbilan/SwiftOxfordAPI.git from cache (0.63s)
Creating working copy for https://github.com/maximbilan/SwiftOxfordAPI.git
Working copy of https://github.com/maximbilan/SwiftOxfordAPI.git resolved at master (322df3b)
warning: '.resolve-product-dependencies': dependency 'swiftoxfordapi' 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/maximbilan/SwiftOxfordAPI.git
https://github.com/maximbilan/SwiftOxfordAPI.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "SwiftOxfordAPI",
  "name" : "SwiftOxfordAPI",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "SwiftOxfordAPI",
      "targets" : [
        "SwiftOxfordAPI"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SwiftOxfordAPI",
      "module_type" : "SwiftTarget",
      "name" : "SwiftOxfordAPI",
      "path" : "Sources",
      "product_memberships" : [
        "SwiftOxfordAPI"
      ],
      "sources" : [
        "SwiftOxfordAPI.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.2"
}
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
[3/4] Compiling SwiftOxfordAPI SwiftOxfordAPI.swift
/Users/admin/builder/spi-builder-workspace/Sources/SwiftOxfordAPI.swift:15:20: warning: static property 'shared' is not concurrency-safe because non-'Sendable' type 'SwiftOxfordAPI' may have shared mutable state; this is an error in the Swift 6 language mode
 10 |
 11 | /// A helper class for using Oxford Dictionaries API.
 12 | public class SwiftOxfordAPI {
    |              `- note: class 'SwiftOxfordAPI' does not conform to the 'Sendable' protocol
 13 |
 14 | 	/// Shared instance.
 15 | 	public static let shared = SwiftOxfordAPI()
    |                    |- warning: static property 'shared' is not concurrency-safe because non-'Sendable' type 'SwiftOxfordAPI' may have shared mutable state; this is an error in the Swift 6 language mode
    |                    |- note: add '@MainActor' to make static property 'shared' part of global actor 'MainActor'
    |                    `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 16 |
 17 | 	/// API structure.
/Users/admin/builder/spi-builder-workspace/Sources/SwiftOxfordAPI.swift:145:21: warning: capture of 'completion' with non-sendable type 'SwiftOxfordAPI.RequestHandler' (aka '(Optional<Dictionary<String, Any>>, Optional<any Error>) -> ()') in a '@Sendable' closure
143 |                 (200 ..< 300) ~= response.statusCode,
144 |                 error == nil else {
145 |                     completion(nil, error)
    |                     |- warning: capture of 'completion' with non-sendable type 'SwiftOxfordAPI.RequestHandler' (aka '(Optional<Dictionary<String, Any>>, Optional<any Error>) -> ()') in a '@Sendable' closure
    |                     `- note: a function type must be marked '@Sendable' to conform to 'Sendable'
146 |                     return
147 |             }
[4/4] Emitting module SwiftOxfordAPI
/Users/admin/builder/spi-builder-workspace/Sources/SwiftOxfordAPI.swift:15:20: warning: static property 'shared' is not concurrency-safe because non-'Sendable' type 'SwiftOxfordAPI' may have shared mutable state; this is an error in the Swift 6 language mode
 10 |
 11 | /// A helper class for using Oxford Dictionaries API.
 12 | public class SwiftOxfordAPI {
    |              `- note: class 'SwiftOxfordAPI' does not conform to the 'Sendable' protocol
 13 |
 14 | 	/// Shared instance.
 15 | 	public static let shared = SwiftOxfordAPI()
    |                    |- warning: static property 'shared' is not concurrency-safe because non-'Sendable' type 'SwiftOxfordAPI' may have shared mutable state; this is an error in the Swift 6 language mode
    |                    |- note: add '@MainActor' to make static property 'shared' part of global actor 'MainActor'
    |                    `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 16 |
 17 | 	/// API structure.
Build complete! (3.56s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "SwiftOxfordAPI",
  "name" : "SwiftOxfordAPI",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "SwiftOxfordAPI",
      "targets" : [
        "SwiftOxfordAPI"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SwiftOxfordAPI",
      "module_type" : "SwiftTarget",
      "name" : "SwiftOxfordAPI",
      "path" : "Sources",
      "product_memberships" : [
        "SwiftOxfordAPI"
      ],
      "sources" : [
        "SwiftOxfordAPI.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.2"
}
Done.