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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 WeakReference, reference 1.0.2 (ca924b), with Swift 6.1 for macOS (SPM) on 27 Apr 2025 00:39:57 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/vsanthanam/WeakReference.git
Reference: 1.0.2
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/vsanthanam/WeakReference
 * tag               1.0.2      -> FETCH_HEAD
HEAD is now at ca924b9 Update README.md
Cloned https://github.com/vsanthanam/WeakReference.git
Revision (git rev-parse @):
ca924b9f259908516e16ccf4642c985b0aecacff
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/vsanthanam/WeakReference.git at 1.0.2
Fetching https://github.com/apple/swift-docc-plugin
[1/2049] Fetching swift-docc-plugin
Fetched https://github.com/apple/swift-docc-plugin from cache (1.18s)
Computing version for https://github.com/apple/swift-docc-plugin
Computed https://github.com/apple/swift-docc-plugin at 1.0.0 (1.79s)
Creating working copy for https://github.com/apple/swift-docc-plugin
Working copy of https://github.com/apple/swift-docc-plugin resolved at 1.0.0
========================================
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": "weakreference",
      "name": "WeakReference",
      "url": "https://github.com/vsanthanam/WeakReference.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/WeakReference",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/vsanthanam/WeakReference.git
[1/274] Fetching weakreference
Fetched https://github.com/vsanthanam/WeakReference.git from cache (0.72s)
Creating working copy for https://github.com/vsanthanam/WeakReference.git
Working copy of https://github.com/vsanthanam/WeakReference.git resolved at 1.0.2 (ca924b9)
warning: '.resolve-product-dependencies': dependency 'weakreference' 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/vsanthanam/WeakReference.git
https://github.com/vsanthanam/WeakReference.git
{
  "dependencies" : [
    {
      "identity" : "swift-docc-plugin",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-docc-plugin"
    }
  ],
  "manifest_display_name" : "WeakReference",
  "name" : "WeakReference",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "11.0"
    },
    {
      "name" : "macos",
      "version" : "10.13"
    },
    {
      "name" : "tvos",
      "version" : "11.0"
    },
    {
      "name" : "watchos",
      "version" : "4.0"
    }
  ],
  "products" : [
    {
      "name" : "WeakReference",
      "targets" : [
        "WeakReference"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "WeakReferenceTests",
      "module_type" : "SwiftTarget",
      "name" : "WeakReferenceTests",
      "path" : "Tests/WeakReferenceTests",
      "sources" : [
        "WeakReferenceTests.swift"
      ],
      "target_dependencies" : [
        "WeakReference"
      ],
      "type" : "test"
    },
    {
      "c99name" : "WeakReference",
      "module_type" : "SwiftTarget",
      "name" : "WeakReference",
      "path" : "Sources/WeakReference",
      "product_memberships" : [
        "WeakReference"
      ],
      "sources" : [
        "WeakReference.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.6"
}
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
[1/1] Compiling plugin Swift-DocC Preview
[2/2] Compiling plugin Swift-DocC
Building for debugging...
[2/4] Write sources
[3/4] Write swift-version-2F0A5646E1D333AE.txt
[5/6] Emitting module WeakReference
[6/6] Compiling WeakReference WeakReference.swift
Build complete! (7.61s)
Build complete.
{
  "dependencies" : [
    {
      "identity" : "swift-docc-plugin",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-docc-plugin"
    }
  ],
  "manifest_display_name" : "WeakReference",
  "name" : "WeakReference",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "11.0"
    },
    {
      "name" : "macos",
      "version" : "10.13"
    },
    {
      "name" : "tvos",
      "version" : "11.0"
    },
    {
      "name" : "watchos",
      "version" : "4.0"
    }
  ],
  "products" : [
    {
      "name" : "WeakReference",
      "targets" : [
        "WeakReference"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "WeakReferenceTests",
      "module_type" : "SwiftTarget",
      "name" : "WeakReferenceTests",
      "path" : "Tests/WeakReferenceTests",
      "sources" : [
        "WeakReferenceTests.swift"
      ],
      "target_dependencies" : [
        "WeakReference"
      ],
      "type" : "test"
    },
    {
      "c99name" : "WeakReference",
      "module_type" : "SwiftTarget",
      "name" : "WeakReference",
      "path" : "Sources/WeakReference",
      "product_memberships" : [
        "WeakReference"
      ],
      "sources" : [
        "WeakReference.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.6"
}
✅  Doc result (pending) reported
========================================
GenerateDocs
========================================
Generating docs at path:  $PWD/.docs/vsanthanam/weakreference/1.0.2
Repository:               vsanthanam/WeakReference
Swift version used:       6.1
        .package(url: "https://github.com/apple/swift-docc-plugin", from: "1.0.0")
Target:                   WeakReference
Generating documentation for 'WeakReference'...
Converting documentation...
Conversion complete! (0.09s)
Generated DocC archive at '/Users/admin/builder/spi-builder-workspace/.docs/vsanthanam/weakreference/1.0.2'
Building for debugging...
[0/1] Write swift-version-2F0A5646E1D333AE.txt
[2/3] Emitting module WeakReference
[3/3] Compiling WeakReference WeakReference.swift
Build of target: 'WeakReference' complete! (0.37s)
      62
2	/Users/admin/builder/spi-builder-workspace/.docs/vsanthanam/weakreference/1.0.2
✅  Doc result (uploading) reported
========================================
SyncDocs
========================================
Doc archive source directory: $PWD/.docs/vsanthanam/weakreference/1.0.2
File count: 62
Doc size:   2.0MB
Preparing doc bundle ...
Uploading prod-vsanthanam-weakreference-1.0.2-384c650b.zip to s3://spi-docs-inbox/prod-vsanthanam-weakreference-1.0.2-384c650b.zip
Copying... [20%]
Copying... [40%]
Copying... [60%]
Copying... [80%]
Copying... [100%]
Done.