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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 Lilliput, reference master (aac738), with Swift 6.1 for macOS (SPM) on 28 Apr 2025 23:55:00 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/jkolb/lilliput.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/jkolb/lilliput
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at aac7384 Clean up README. Not sure why Package.resolved wasn't commited previously.
Cloned https://github.com/jkolb/lilliput.git
Revision (git rev-parse @):
aac7384681043b202bd1c9f626a4b0454fe66d3e
SUCCESS checkout https://github.com/jkolb/lilliput.git at master
Fetching https://github.com/apple/swift-system from cache
Fetched https://github.com/apple/swift-system from cache (0.57s)
Computing version for https://github.com/apple/swift-system.git
Computed https://github.com/apple/swift-system.git at 1.3.0 (1.06s)
Creating working copy for https://github.com/apple/swift-system
Working copy of https://github.com/apple/swift-system resolved at 1.3.0
========================================
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": "lilliput",
      "name": "Lilliput",
      "url": "https://github.com/jkolb/lilliput.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/lilliput",
      "dependencies": [
        {
          "identity": "swift-system",
          "name": "swift-system",
          "url": "https://github.com/apple/swift-system.git",
          "version": "1.4.2",
          "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/swift-system",
          "dependencies": [
          ]
        }
      ]
    }
  ]
}
Fetching https://github.com/jkolb/lilliput.git
[1/733] Fetching lilliput
Fetched https://github.com/jkolb/lilliput.git from cache (0.74s)
Fetching https://github.com/apple/swift-system.git from cache
Fetched https://github.com/apple/swift-system.git from cache (0.53s)
Computing version for https://github.com/apple/swift-system.git
Computed https://github.com/apple/swift-system.git at 1.4.2 (1.00s)
Creating working copy for https://github.com/apple/swift-system.git
Working copy of https://github.com/apple/swift-system.git resolved at 1.4.2
Creating working copy for https://github.com/jkolb/lilliput.git
Working copy of https://github.com/jkolb/lilliput.git resolved at master (aac7384)
warning: '.resolve-product-dependencies': dependency 'lilliput' is not used by any target
Found 1 product dependencies
  - swift-system
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/jkolb/lilliput.git
https://github.com/jkolb/lilliput.git
{
  "dependencies" : [
    {
      "identity" : "swift-system",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-system.git"
    }
  ],
  "manifest_display_name" : "Lilliput",
  "name" : "Lilliput",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "16.0"
    },
    {
      "name" : "macos",
      "version" : "11.0"
    },
    {
      "name" : "watchos",
      "version" : "9.0"
    }
  ],
  "products" : [
    {
      "name" : "Lilliput",
      "targets" : [
        "Lilliput"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "LilliputTests",
      "module_type" : "SwiftTarget",
      "name" : "LilliputTests",
      "path" : "Tests/LilliputTests",
      "sources" : [
        "ByteAlignmentTests.swift"
      ],
      "target_dependencies" : [
        "Lilliput"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Lilliput",
      "module_type" : "SwiftTarget",
      "name" : "Lilliput",
      "path" : "Sources/Lilliput",
      "product_dependencies" : [
        "SystemPackage"
      ],
      "product_memberships" : [
        "Lilliput"
      ],
      "sources" : [
        "ByteAlignment.swift",
        "ByteBuffer.swift",
        "ByteDecoder.swift",
        "ByteEncoder.swift",
        "ByteError.swift",
        "ByteReader.swift",
        "ByteSpan.swift",
        "ByteTuple.swift",
        "ByteWriter.swift",
        "CP1252.swift",
        "CollectionByteDecoder.swift",
        "Element.swift",
        "FileDescriptor+ByteBuffer.swift",
        "FileDescriptor+ReadAll.swift",
        "FoundationAdditions.swift",
        "HexString.swift",
        "KeyValue.swift",
        "Magic2.swift",
        "Magic4.swift",
        "RawValue.swift",
        "String.swift",
        "ValueKey.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...
[0/4] Write sources
[2/4] Compiling CSystem shims.c
[3/4] Write swift-version-2F0A5646E1D333AE.txt
[5/25] Compiling SystemPackage FilePathComponents.swift
[6/25] Compiling SystemPackage FilePathParsing.swift
[7/25] Compiling SystemPackage Errno.swift
[8/25] Compiling SystemPackage FileDescriptor.swift
[9/25] Compiling SystemPackage FileHelpers.swift
[10/27] Emitting module SystemPackage
[11/27] Compiling SystemPackage FilePathWindows.swift
[12/27] Compiling SystemPackage FilePermissions.swift
[13/27] Compiling SystemPackage PlatformString.swift
[14/27] Compiling SystemPackage SystemString.swift
[15/27] Compiling SystemPackage Util.swift
[16/27] Compiling SystemPackage UtilConsumers.swift
[17/27] Compiling SystemPackage FileOperations.swift
[18/27] Compiling SystemPackage FilePath.swift
[19/27] Compiling SystemPackage FilePathComponentView.swift
[20/27] Compiling SystemPackage FilePathString.swift
[21/27] Compiling SystemPackage FilePathSyntax.swift
[22/27] Compiling SystemPackage Syscalls.swift
[23/27] Compiling SystemPackage WindowsSyscallAdapters.swift
[24/27] Compiling SystemPackage Exports.swift
[25/27] Compiling SystemPackage Mocking.swift
[26/27] Compiling SystemPackage CInterop.swift
[27/27] Compiling SystemPackage Constants.swift
[28/48] Compiling Lilliput FileDescriptor+ByteBuffer.swift
[29/48] Compiling Lilliput FileDescriptor+ReadAll.swift
[30/50] Compiling Lilliput Magic4.swift
[31/50] Compiling Lilliput RawValue.swift
[32/50] Compiling Lilliput ByteSpan.swift
[33/50] Compiling Lilliput ByteTuple.swift
[34/50] Emitting module Lilliput
[35/50] Compiling Lilliput ByteEncoder.swift
[36/50] Compiling Lilliput ByteError.swift
[37/50] Compiling Lilliput ByteReader.swift
[38/50] Compiling Lilliput ByteAlignment.swift
[39/50] Compiling Lilliput ByteBuffer.swift
[40/50] Compiling Lilliput ByteDecoder.swift
[41/50] Compiling Lilliput String.swift
[42/50] Compiling Lilliput ValueKey.swift
[43/50] Compiling Lilliput CollectionByteDecoder.swift
[44/50] Compiling Lilliput Element.swift
[45/50] Compiling Lilliput KeyValue.swift
[46/50] Compiling Lilliput Magic2.swift
[47/50] Compiling Lilliput ByteWriter.swift
[48/50] Compiling Lilliput CP1252.swift
[49/50] Compiling Lilliput FoundationAdditions.swift
[50/50] Compiling Lilliput HexString.swift
Build complete! (7.22s)
warning: 'swift-system': found 1 file(s) which are unhandled; explicitly declare them as resources or exclude from the target
    /Users/admin/builder/spi-builder-workspace/.build/checkouts/swift-system/Sources/System/CMakeLists.txt
Build complete.
{
  "dependencies" : [
    {
      "identity" : "swift-system",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-system.git"
    }
  ],
  "manifest_display_name" : "Lilliput",
  "name" : "Lilliput",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "16.0"
    },
    {
      "name" : "macos",
      "version" : "11.0"
    },
    {
      "name" : "watchos",
      "version" : "9.0"
    }
  ],
  "products" : [
    {
      "name" : "Lilliput",
      "targets" : [
        "Lilliput"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "LilliputTests",
      "module_type" : "SwiftTarget",
      "name" : "LilliputTests",
      "path" : "Tests/LilliputTests",
      "sources" : [
        "ByteAlignmentTests.swift"
      ],
      "target_dependencies" : [
        "Lilliput"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Lilliput",
      "module_type" : "SwiftTarget",
      "name" : "Lilliput",
      "path" : "Sources/Lilliput",
      "product_dependencies" : [
        "SystemPackage"
      ],
      "product_memberships" : [
        "Lilliput"
      ],
      "sources" : [
        "ByteAlignment.swift",
        "ByteBuffer.swift",
        "ByteDecoder.swift",
        "ByteEncoder.swift",
        "ByteError.swift",
        "ByteReader.swift",
        "ByteSpan.swift",
        "ByteTuple.swift",
        "ByteWriter.swift",
        "CP1252.swift",
        "CollectionByteDecoder.swift",
        "Element.swift",
        "FileDescriptor+ByteBuffer.swift",
        "FileDescriptor+ReadAll.swift",
        "FoundationAdditions.swift",
        "HexString.swift",
        "KeyValue.swift",
        "Magic2.swift",
        "Magic4.swift",
        "RawValue.swift",
        "String.swift",
        "ValueKey.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.9"
}
Done.