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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 ClosureChain, reference main (f6453c), with Swift 6.1 for macOS (SPM) on 26 Apr 2025 06:03:28 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: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/dannys42/ClosureChain.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/dannys42/ClosureChain
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at f6453c1 Added .jazzy.yaml; updated jazzy docs
Cloned https://github.com/dannys42/ClosureChain.git
Revision (git rev-parse @):
f6453c1c94e3cd3e495d99d4367cf57b9198c89d
SUCCESS checkout https://github.com/dannys42/ClosureChain.git at main
========================================
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": "closurechain",
      "name": "ClosureChain",
      "url": "https://github.com/dannys42/ClosureChain.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/ClosureChain",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/dannys42/ClosureChain.git
[1/238] Fetching closurechain
Fetched https://github.com/dannys42/ClosureChain.git from cache (0.79s)
Creating working copy for https://github.com/dannys42/ClosureChain.git
Working copy of https://github.com/dannys42/ClosureChain.git resolved at main (f6453c1)
warning: '.resolve-product-dependencies': dependency 'closurechain' 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/dannys42/ClosureChain.git
https://github.com/dannys42/ClosureChain.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "ClosureChain",
  "name" : "ClosureChain",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "ClosureChain",
      "targets" : [
        "ClosureChain"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ClosureChainTests",
      "module_type" : "SwiftTarget",
      "name" : "ClosureChainTests",
      "path" : "Tests/ClosureChainTests",
      "sources" : [
        "ClosureChainTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "ClosureChain"
      ],
      "type" : "test"
    },
    {
      "c99name" : "ClosureChain",
      "module_type" : "SwiftTarget",
      "name" : "ClosureChain",
      "path" : "Sources/ClosureChain",
      "product_memberships" : [
        "ClosureChain"
      ],
      "sources" : [
        "ClosureChain.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
[3/4] Emitting module ClosureChain
[4/4] Compiling ClosureChain ClosureChain.swift
Build complete! (4.16s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "ClosureChain",
  "name" : "ClosureChain",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "ClosureChain",
      "targets" : [
        "ClosureChain"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ClosureChainTests",
      "module_type" : "SwiftTarget",
      "name" : "ClosureChainTests",
      "path" : "Tests/ClosureChainTests",
      "sources" : [
        "ClosureChainTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "ClosureChain"
      ],
      "type" : "test"
    },
    {
      "c99name" : "ClosureChain",
      "module_type" : "SwiftTarget",
      "name" : "ClosureChain",
      "path" : "Sources/ClosureChain",
      "product_memberships" : [
        "ClosureChain"
      ],
      "sources" : [
        "ClosureChain.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.2"
}
Done.