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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 SDEFinitely, reference master (1b375a), with Swift 6.1 for macOS (SPM) on 26 Apr 2025 12:57:43 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/ThatsJustCheesy/SDEFinitely.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/ThatsJustCheesy/SDEFinitely
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 1b375a7 Move error types to separate file
Cloned https://github.com/ThatsJustCheesy/SDEFinitely.git
Revision (git rev-parse @):
1b375a73e6498342a96fc826e0e91f1057b6149f
SUCCESS checkout https://github.com/ThatsJustCheesy/SDEFinitely.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": "sdefinitely",
      "name": "SDEFinitely",
      "url": "https://github.com/ThatsJustCheesy/SDEFinitely.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/SDEFinitely",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/ThatsJustCheesy/SDEFinitely.git
[1/68] Fetching sdefinitely
Fetched https://github.com/ThatsJustCheesy/SDEFinitely.git from cache (0.67s)
Creating working copy for https://github.com/ThatsJustCheesy/SDEFinitely.git
Working copy of https://github.com/ThatsJustCheesy/SDEFinitely.git resolved at master (1b375a7)
warning: '.resolve-product-dependencies': dependency 'sdefinitely' 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/ThatsJustCheesy/SDEFinitely.git
https://github.com/ThatsJustCheesy/SDEFinitely.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "SDEFinitely",
  "name" : "SDEFinitely",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.11"
    }
  ],
  "products" : [
    {
      "name" : "SDEFinitely",
      "targets" : [
        "SDEFinitely"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SDEFinitelyTests",
      "module_type" : "SwiftTarget",
      "name" : "SDEFinitelyTests",
      "path" : "Tests/SDEFinitelyTests",
      "sources" : [
        "SDEFinitelyTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "SDEFinitely"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SDEFinitely",
      "module_type" : "SwiftTarget",
      "name" : "SDEFinitely",
      "path" : "Sources/SDEFinitely",
      "product_memberships" : [
        "SDEFinitely"
      ],
      "sources" : [
        "Errors.swift",
        "SDEFinitely.swift",
        "Support.swift",
        "Term.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.1"
}
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
[3/7] Compiling SDEFinitely Support.swift
[4/7] Compiling SDEFinitely Term.swift
[5/7] Compiling SDEFinitely Errors.swift
/Users/admin/builder/spi-builder-workspace/Sources/SDEFinitely/Errors.swift:10:14: warning: non-final class 'SDEFError' cannot conform to 'Sendable'; use '@unchecked Sendable'; this is an error in the Swift 6 language mode
 8 | import Foundation
 9 |
10 | public class SDEFError: Error {
   |              `- warning: non-final class 'SDEFError' cannot conform to 'Sendable'; use '@unchecked Sendable'; this is an error in the Swift 6 language mode
11 |
12 |     public let message: String
[6/7] Emitting module SDEFinitely
/Users/admin/builder/spi-builder-workspace/Sources/SDEFinitely/Errors.swift:10:14: warning: non-final class 'SDEFError' cannot conform to 'Sendable'; use '@unchecked Sendable'; this is an error in the Swift 6 language mode
 8 | import Foundation
 9 |
10 | public class SDEFError: Error {
   |              `- warning: non-final class 'SDEFError' cannot conform to 'Sendable'; use '@unchecked Sendable'; this is an error in the Swift 6 language mode
11 |
12 |     public let message: String
[7/7] Compiling SDEFinitely SDEFinitely.swift
Build complete! (5.28s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "SDEFinitely",
  "name" : "SDEFinitely",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.11"
    }
  ],
  "products" : [
    {
      "name" : "SDEFinitely",
      "targets" : [
        "SDEFinitely"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SDEFinitelyTests",
      "module_type" : "SwiftTarget",
      "name" : "SDEFinitelyTests",
      "path" : "Tests/SDEFinitelyTests",
      "sources" : [
        "SDEFinitelyTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "SDEFinitely"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SDEFinitely",
      "module_type" : "SwiftTarget",
      "name" : "SDEFinitely",
      "path" : "Sources/SDEFinitely",
      "product_memberships" : [
        "SDEFinitely"
      ],
      "sources" : [
        "Errors.swift",
        "SDEFinitely.swift",
        "Support.swift",
        "Term.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.1"
}
Done.