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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 UInt256, reference master (a5cd57), with Swift 6.1 for macOS (SPM) on 25 Apr 2025 20:54:41 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/hyugit/UInt256.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/hyugit/UInt256
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at a5cd575 Update min and max in UnsignedInteger extension to support Swift 6.0 (#8)
Cloned https://github.com/hyugit/UInt256.git
Revision (git rev-parse @):
a5cd5756244550da79721986ef303cfad3987c75
SUCCESS checkout https://github.com/hyugit/UInt256.git at master
========================================
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": "uint256",
      "name": "UInt256",
      "url": "https://github.com/hyugit/UInt256.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/UInt256",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/hyugit/UInt256.git
[1/582] Fetching uint256
Fetched https://github.com/hyugit/UInt256.git from cache (0.73s)
Creating working copy for https://github.com/hyugit/UInt256.git
Working copy of https://github.com/hyugit/UInt256.git resolved at master (a5cd575)
warning: '.resolve-product-dependencies': dependency 'uint256' 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/hyugit/UInt256.git
https://github.com/hyugit/UInt256.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "UInt256",
  "name" : "UInt256",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "UInt256",
      "targets" : [
        "UInt256"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "UInt256Tests",
      "module_type" : "SwiftTarget",
      "name" : "UInt256Tests",
      "path" : "Tests",
      "sources" : [
        "Arithmetics.swift",
        "BinaryOperations.swift",
        "LinuxMain.swift",
        "PerformanceTests.swift",
        "UInt256Tests.swift"
      ],
      "target_dependencies" : [
        "UInt256"
      ],
      "type" : "test"
    },
    {
      "c99name" : "UInt256",
      "module_type" : "SwiftTarget",
      "name" : "UInt256",
      "path" : "Sources",
      "product_memberships" : [
        "UInt256"
      ],
      "sources" : [
        "FixedWidthInteger+BarrettDivision.swift",
        "FixedWidthInteger+LongDivision.swift",
        "UInt256+BinaryInteger.swift",
        "UInt256+Comparable.swift",
        "UInt256+CustomStringConvertible.swift",
        "UInt256+Divide&Conquer.swift",
        "UInt256+Equatable.swift",
        "UInt256+ExpressibleByIntegerLiteral.swift",
        "UInt256+FixedWidthInteger.swift",
        "UInt256+Hashable.swift",
        "UInt256+Karatsuba.swift",
        "UInt256+Numeric.swift",
        "UInt256+UnsignedInteger.swift",
        "UInt256+arc4random.swift",
        "UInt256.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.0"
}
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
[3/17] Compiling UInt256 UInt256+Karatsuba.swift
[4/17] Compiling UInt256 UInt256+Equatable.swift
[5/17] Compiling UInt256 UInt256+ExpressibleByIntegerLiteral.swift
[6/18] Compiling UInt256 UInt256+CustomStringConvertible.swift
[7/18] Compiling UInt256 UInt256+Divide&Conquer.swift
[8/18] Compiling UInt256 UInt256+UnsignedInteger.swift
[9/18] Compiling UInt256 UInt256+arc4random.swift
[10/18] Compiling UInt256 UInt256+Numeric.swift
[11/18] Compiling UInt256 UInt256+FixedWidthInteger.swift
[12/18] Compiling UInt256 UInt256+Hashable.swift
[13/18] Emitting module UInt256
[14/18] Compiling UInt256 UInt256+BinaryInteger.swift
[15/18] Compiling UInt256 UInt256+Comparable.swift
[16/18] Compiling UInt256 FixedWidthInteger+BarrettDivision.swift
[17/18] Compiling UInt256 FixedWidthInteger+LongDivision.swift
[18/18] Compiling UInt256 UInt256.swift
Build complete! (5.22s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "UInt256",
  "name" : "UInt256",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "UInt256",
      "targets" : [
        "UInt256"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "UInt256Tests",
      "module_type" : "SwiftTarget",
      "name" : "UInt256Tests",
      "path" : "Tests",
      "sources" : [
        "Arithmetics.swift",
        "BinaryOperations.swift",
        "LinuxMain.swift",
        "PerformanceTests.swift",
        "UInt256Tests.swift"
      ],
      "target_dependencies" : [
        "UInt256"
      ],
      "type" : "test"
    },
    {
      "c99name" : "UInt256",
      "module_type" : "SwiftTarget",
      "name" : "UInt256",
      "path" : "Sources",
      "product_memberships" : [
        "UInt256"
      ],
      "sources" : [
        "FixedWidthInteger+BarrettDivision.swift",
        "FixedWidthInteger+LongDivision.swift",
        "UInt256+BinaryInteger.swift",
        "UInt256+Comparable.swift",
        "UInt256+CustomStringConvertible.swift",
        "UInt256+Divide&Conquer.swift",
        "UInt256+Equatable.swift",
        "UInt256+ExpressibleByIntegerLiteral.swift",
        "UInt256+FixedWidthInteger.swift",
        "UInt256+Hashable.swift",
        "UInt256+Karatsuba.swift",
        "UInt256+Numeric.swift",
        "UInt256+UnsignedInteger.swift",
        "UInt256+arc4random.swift",
        "UInt256.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.0"
}
Done.