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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 swift-capture, reference main (1c9e08), with Swift 6.1 for macOS (SPM) on 27 Apr 2025 23:42:23 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/capturecontext/swift-capture.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/capturecontext/swift-capture
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 1c9e08e Update README.md
Cloned https://github.com/capturecontext/swift-capture.git
Revision (git rev-parse @):
1c9e08e395bc63940cfd6f94ffd41722e3b5cdc2
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/capturecontext/swift-capture.git at main
Fetching https://github.com/apple/swift-docc-plugin.git
[1/2049] Fetching swift-docc-plugin
Fetched https://github.com/apple/swift-docc-plugin.git from cache (1.20s)
Computing version for https://github.com/apple/swift-docc-plugin.git
Computed https://github.com/apple/swift-docc-plugin.git at 1.4.3 (2.23s)
Fetching https://github.com/swiftlang/swift-docc-symbolkit from cache
Fetched https://github.com/swiftlang/swift-docc-symbolkit from cache (0.74s)
Computing version for https://github.com/swiftlang/swift-docc-symbolkit
Computed https://github.com/swiftlang/swift-docc-symbolkit at 1.0.0 (1.39s)
Creating working copy for https://github.com/apple/swift-docc-plugin.git
Working copy of https://github.com/apple/swift-docc-plugin.git resolved at 1.4.3
Creating working copy for https://github.com/swiftlang/swift-docc-symbolkit
Working copy of https://github.com/swiftlang/swift-docc-symbolkit 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": "swift-capture",
      "name": "swift-capture",
      "url": "https://github.com/capturecontext/swift-capture.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/swift-capture",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/capturecontext/swift-capture.git
[1/123] Fetching swift-capture
Fetched https://github.com/capturecontext/swift-capture.git from cache (0.84s)
Creating working copy for https://github.com/capturecontext/swift-capture.git
Working copy of https://github.com/capturecontext/swift-capture.git resolved at main (1c9e08e)
warning: '.resolve-product-dependencies': dependency 'swift-capture' 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/capturecontext/swift-capture.git
https://github.com/capturecontext/swift-capture.git
{
  "dependencies" : [
    {
      "identity" : "swift-docc-plugin",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.3.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-docc-plugin.git"
    }
  ],
  "manifest_display_name" : "swift-capture",
  "name" : "swift-capture",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Capture",
      "targets" : [
        "Capture"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "CaptureTests",
      "module_type" : "SwiftTarget",
      "name" : "CaptureTests",
      "path" : "Tests/CaptureTests",
      "sources" : [
        "CaptureTests.swift"
      ],
      "target_dependencies" : [
        "Capture"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Capture",
      "module_type" : "SwiftTarget",
      "name" : "Capture",
      "path" : "Sources/Capture",
      "product_memberships" : [
        "Capture"
      ],
      "sources" : [
        "Capture.swift",
        "OptionalReferenceContainerProtocol.swift",
        "Weak.swift",
        "Weakifiable.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
[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
[5/9] Compiling Capture Weak.swift
[6/9] Compiling Capture Capture.swift
[7/9] Emitting module Capture
[8/9] Compiling Capture OptionalReferenceContainerProtocol.swift
[9/9] Compiling Capture Weakifiable.swift
Build complete! (13.91s)
Build complete.
{
  "dependencies" : [
    {
      "identity" : "swift-docc-plugin",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.3.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-docc-plugin.git"
    }
  ],
  "manifest_display_name" : "swift-capture",
  "name" : "swift-capture",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Capture",
      "targets" : [
        "Capture"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "CaptureTests",
      "module_type" : "SwiftTarget",
      "name" : "CaptureTests",
      "path" : "Tests/CaptureTests",
      "sources" : [
        "CaptureTests.swift"
      ],
      "target_dependencies" : [
        "Capture"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Capture",
      "module_type" : "SwiftTarget",
      "name" : "Capture",
      "path" : "Sources/Capture",
      "product_memberships" : [
        "Capture"
      ],
      "sources" : [
        "Capture.swift",
        "OptionalReferenceContainerProtocol.swift",
        "Weak.swift",
        "Weakifiable.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.9"
}
Done.