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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 Flatten, reference 0.1.0 (528614), with Swift 6.1 for macOS (SPM) on 27 Apr 2025 02:24:13 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/YusukeHosonuma/Flatten.git
Reference: 0.1.0
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/YusukeHosonuma/Flatten
 * tag               0.1.0      -> FETCH_HEAD
HEAD is now at 5286148 update: README
Cloned https://github.com/YusukeHosonuma/Flatten.git
Revision (git rev-parse @):
5286148aa255f57863e0d7e2b827ca6b91677051
SUCCESS checkout https://github.com/YusukeHosonuma/Flatten.git at 0.1.0
========================================
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": "flatten",
      "name": "Flatten",
      "url": "https://github.com/YusukeHosonuma/Flatten.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Flatten",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/YusukeHosonuma/Flatten.git
[1/142] Fetching flatten
Fetched https://github.com/YusukeHosonuma/Flatten.git from cache (0.65s)
Creating working copy for https://github.com/YusukeHosonuma/Flatten.git
Working copy of https://github.com/YusukeHosonuma/Flatten.git resolved at 0.1.0 (5286148)
Found 0 product dependencies
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/YusukeHosonuma/Flatten.git
https://github.com/YusukeHosonuma/Flatten.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Flatten",
  "name" : "Flatten",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Flatten",
      "targets" : [
        "Flatten"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "FlattenGen",
      "targets" : [
        "FlattenGen"
      ],
      "type" : {
        "executable" : null
      }
    },
    {
      "name" : "FlattenGenLib",
      "targets" : [
        "FlattenGenLib"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "FlattenTests",
      "module_type" : "SwiftTarget",
      "name" : "FlattenTests",
      "path" : "Tests/FlattenTests",
      "sources" : [
        "FlattenTests.swift"
      ],
      "target_dependencies" : [
        "Flatten"
      ],
      "type" : "test"
    },
    {
      "c99name" : "FlattenGenTests",
      "module_type" : "SwiftTarget",
      "name" : "FlattenGenTests",
      "path" : "Tests/FlattenGenTests",
      "sources" : [
        "Assertion.swift",
        "FlattenGenTests.swift"
      ],
      "target_dependencies" : [
        "FlattenGenLib"
      ],
      "type" : "test"
    },
    {
      "c99name" : "FlattenGenLib",
      "module_type" : "SwiftTarget",
      "name" : "FlattenGenLib",
      "path" : "Sources/FlattenGenLib",
      "product_memberships" : [
        "FlattenGen",
        "FlattenGenLib"
      ],
      "sources" : [
        "FlattenGen.swift"
      ],
      "type" : "library"
    },
    {
      "c99name" : "FlattenGen",
      "module_type" : "SwiftTarget",
      "name" : "FlattenGen",
      "path" : "Sources/FlattenGen",
      "product_memberships" : [
        "FlattenGen"
      ],
      "sources" : [
        "main.swift"
      ],
      "target_dependencies" : [
        "FlattenGenLib"
      ],
      "type" : "executable"
    },
    {
      "c99name" : "Flatten",
      "module_type" : "SwiftTarget",
      "name" : "Flatten",
      "path" : "Sources/Flatten",
      "product_memberships" : [
        "Flatten"
      ],
      "sources" : [
        "Flatten.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.1"
}
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...
[0/8] Write sources
[3/8] Write FlattenGen-entitlement.plist
[4/8] Write swift-version-2F0A5646E1D333AE.txt
[6/12] Emitting module FlattenGenLib
[7/12] Compiling FlattenGenLib FlattenGen.swift
[8/12] Compiling Flatten Flatten.swift
[9/12] Emitting module Flatten
[10/14] Compiling FlattenGen main.swift
[11/14] Emitting module FlattenGen
[11/14] Write Objects.LinkFileList
[12/14] Linking FlattenGen
[13/14] Applying FlattenGen
Build complete! (4.51s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Flatten",
  "name" : "Flatten",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Flatten",
      "targets" : [
        "Flatten"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "FlattenGen",
      "targets" : [
        "FlattenGen"
      ],
      "type" : {
        "executable" : null
      }
    },
    {
      "name" : "FlattenGenLib",
      "targets" : [
        "FlattenGenLib"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "FlattenTests",
      "module_type" : "SwiftTarget",
      "name" : "FlattenTests",
      "path" : "Tests/FlattenTests",
      "sources" : [
        "FlattenTests.swift"
      ],
      "target_dependencies" : [
        "Flatten"
      ],
      "type" : "test"
    },
    {
      "c99name" : "FlattenGenTests",
      "module_type" : "SwiftTarget",
      "name" : "FlattenGenTests",
      "path" : "Tests/FlattenGenTests",
      "sources" : [
        "Assertion.swift",
        "FlattenGenTests.swift"
      ],
      "target_dependencies" : [
        "FlattenGenLib"
      ],
      "type" : "test"
    },
    {
      "c99name" : "FlattenGenLib",
      "module_type" : "SwiftTarget",
      "name" : "FlattenGenLib",
      "path" : "Sources/FlattenGenLib",
      "product_memberships" : [
        "FlattenGen",
        "FlattenGenLib"
      ],
      "sources" : [
        "FlattenGen.swift"
      ],
      "type" : "library"
    },
    {
      "c99name" : "FlattenGen",
      "module_type" : "SwiftTarget",
      "name" : "FlattenGen",
      "path" : "Sources/FlattenGen",
      "product_memberships" : [
        "FlattenGen"
      ],
      "sources" : [
        "main.swift"
      ],
      "target_dependencies" : [
        "FlattenGenLib"
      ],
      "type" : "executable"
    },
    {
      "c99name" : "Flatten",
      "module_type" : "SwiftTarget",
      "name" : "Flatten",
      "path" : "Sources/Flatten",
      "product_memberships" : [
        "Flatten"
      ],
      "sources" : [
        "Flatten.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.1"
}
Done.