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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 Queue, reference main (9f941a), with Swift 6.1 for macOS (SPM) on 30 Apr 2025 12:44:06 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/mattmassicotte/Queue.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/mattmassicotte/Queue
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 9f941ae downgrade linux CI
Cloned https://github.com/mattmassicotte/Queue.git
Revision (git rev-parse @):
9f941ae35f146ccadd2689b9ab8d5aebb1f5d584
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/mattmassicotte/Queue.git at main
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/mattmassicotte/Queue.git
https://github.com/mattmassicotte/Queue.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Queue",
  "name" : "Queue",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.15"
    },
    {
      "name" : "maccatalyst",
      "version" : "13.0"
    },
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "tvos",
      "version" : "13.0"
    },
    {
      "name" : "watchos",
      "version" : "6.0"
    }
  ],
  "products" : [
    {
      "name" : "Queue",
      "targets" : [
        "Queue"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "QueueTests",
      "module_type" : "SwiftTarget",
      "name" : "QueueTests",
      "path" : "Tests/QueueTests",
      "sources" : [
        "AsyncQueueTests.swift",
        "AsyncSerialQueueTests.swift",
        "XCTestCase+Fulfillment.swift"
      ],
      "target_dependencies" : [
        "Queue"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Queue",
      "module_type" : "SwiftTarget",
      "name" : "Queue",
      "path" : "Sources/Queue",
      "product_memberships" : [
        "Queue"
      ],
      "sources" : [
        "AsyncQueue.swift",
        "AsyncSerialQueue.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.9"
}
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
[3/5] Emitting module Queue
[4/5] Compiling Queue AsyncQueue.swift
[5/5] Compiling Queue AsyncSerialQueue.swift
Build complete! (4.68s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Queue",
  "name" : "Queue",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.15"
    },
    {
      "name" : "maccatalyst",
      "version" : "13.0"
    },
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "tvos",
      "version" : "13.0"
    },
    {
      "name" : "watchos",
      "version" : "6.0"
    }
  ],
  "products" : [
    {
      "name" : "Queue",
      "targets" : [
        "Queue"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "QueueTests",
      "module_type" : "SwiftTarget",
      "name" : "QueueTests",
      "path" : "Tests/QueueTests",
      "sources" : [
        "AsyncQueueTests.swift",
        "AsyncSerialQueueTests.swift",
        "XCTestCase+Fulfillment.swift"
      ],
      "target_dependencies" : [
        "Queue"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Queue",
      "module_type" : "SwiftTarget",
      "name" : "Queue",
      "path" : "Sources/Queue",
      "product_memberships" : [
        "Queue"
      ],
      "sources" : [
        "AsyncQueue.swift",
        "AsyncSerialQueue.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.9"
}
Done.