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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 Align, reference 3.3.1 (9cadf7), with Swift 6.1 for macOS (SPM) on 29 Apr 2025 15:46:51 UTC.

Swift 6 data race errors: 0

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: 4.61.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/kean/Align.git
Reference: 3.3.1
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/kean/Align
 * tag               3.3.1      -> FETCH_HEAD
HEAD is now at 9cadf70 Merge pull request #9 from akaDuality/main
Cloned https://github.com/kean/Align.git
Revision (git rev-parse @):
9cadf7051f770cff392513f9695ab9d870da7ade
SUCCESS checkout https://github.com/kean/Align.git at 3.3.1
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/kean/Align.git
https://github.com/kean/Align.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Align",
  "name" : "Align",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "14.0"
    },
    {
      "name" : "tvos",
      "version" : "14.0"
    },
    {
      "name" : "macos",
      "version" : "11.0"
    }
  ],
  "products" : [
    {
      "name" : "Align",
      "targets" : [
        "Align"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "AlignTests",
      "module_type" : "SwiftTarget",
      "name" : "AlignTests",
      "path" : "Tests",
      "sources" : [
        "AnchorAPIsTests.swift",
        "AnchorAlignmentTests.swift",
        "AnchorCenterTests.swift",
        "AnchorCollectionCenterTests.swift",
        "AnchorCollectionEdgesTests.swift",
        "AnchorCollectionSizeTests.swift",
        "AnchorDimensionTests.swift",
        "AnchorEdgeTests.swift",
        "AnchorPerformanceTests.swift",
        "AnchorTests.swift",
        "ConstraintsTests.swift",
        "Extensions/Align+Extensions.swift",
        "Extensions/Diff.swift",
        "Extensions/XCTestExtensions.swift"
      ],
      "target_dependencies" : [
        "Align"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Align",
      "module_type" : "SwiftTarget",
      "name" : "Align",
      "path" : "Sources",
      "product_memberships" : [
        "Align"
      ],
      "sources" : [
        "Align.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.10"
}
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 Align Align.swift
/Users/admin/builder/spi-builder-workspace/Sources/Align.swift:512:25: warning: conformance of 'NSLayoutConstraint' to 'Sendable' is unavailable; this is an error in the Swift 6 language mode
510 |
511 |     public nonisolated subscript(position: Int) -> NSLayoutConstraint {
512 |         get { MainActor.assumeIsolated { constraints[position] } }
    |                         `- warning: conformance of 'NSLayoutConstraint' to 'Sendable' is unavailable; this is an error in the Swift 6 language mode
513 |     }
514 |     public nonisolated var startIndex: Int { MainActor.assumeIsolated { constraints.startIndex } }
:1:1: note: conformance of 'NSLayoutConstraint' to 'Sendable' has been explicitly marked unavailable here
1 | @_nonSendable(_assumed)
  | `- note: conformance of 'NSLayoutConstraint' to 'Sendable' has been explicitly marked unavailable here
[4/4] Emitting module Align
Build complete! (7.00s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Align",
  "name" : "Align",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "14.0"
    },
    {
      "name" : "tvos",
      "version" : "14.0"
    },
    {
      "name" : "macos",
      "version" : "11.0"
    }
  ],
  "products" : [
    {
      "name" : "Align",
      "targets" : [
        "Align"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "AlignTests",
      "module_type" : "SwiftTarget",
      "name" : "AlignTests",
      "path" : "Tests",
      "sources" : [
        "AnchorAPIsTests.swift",
        "AnchorAlignmentTests.swift",
        "AnchorCenterTests.swift",
        "AnchorCollectionCenterTests.swift",
        "AnchorCollectionEdgesTests.swift",
        "AnchorCollectionSizeTests.swift",
        "AnchorDimensionTests.swift",
        "AnchorEdgeTests.swift",
        "AnchorPerformanceTests.swift",
        "AnchorTests.swift",
        "ConstraintsTests.swift",
        "Extensions/Align+Extensions.swift",
        "Extensions/Diff.swift",
        "Extensions/XCTestExtensions.swift"
      ],
      "target_dependencies" : [
        "Align"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Align",
      "module_type" : "SwiftTarget",
      "name" : "Align",
      "path" : "Sources",
      "product_memberships" : [
        "Align"
      ],
      "sources" : [
        "Align.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.10"
}
Done.