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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 Base58Swift, reference 2.1.14 (1c13ea), with Swift 6.1 for macOS (SPM) on 26 Apr 2025 10:38:11 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/keefertaylor/Base58Swift.git
Reference: 2.1.14
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/keefertaylor/Base58Swift
 * tag               2.1.14     -> FETCH_HEAD
HEAD is now at 1c13ea6 reset xcodeproj
Cloned https://github.com/keefertaylor/Base58Swift.git
Revision (git rev-parse @):
1c13ea6b07f1584660526f8bde3d4cc150e91acd
SUCCESS checkout https://github.com/keefertaylor/Base58Swift.git at 2.1.14
Fetching https://github.com/attaswift/BigInt.git
Fetching https://github.com/attaswift/SipHash
[1/4771] Fetching bigint
[2/5211] Fetching bigint, siphash
Fetched https://github.com/attaswift/SipHash from cache (1.12s)
Fetched https://github.com/attaswift/BigInt.git from cache (1.12s)
Computing version for https://github.com/attaswift/BigInt.git
Computed https://github.com/attaswift/BigInt.git at 5.5.1 (1.59s)
Creating working copy for https://github.com/attaswift/BigInt.git
Working copy of https://github.com/attaswift/BigInt.git resolved at 5.5.1
========================================
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": "base58swift",
      "name": "Base58Swift",
      "url": "https://github.com/keefertaylor/Base58Swift.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Base58Swift",
      "dependencies": [
        {
          "identity": "bigint",
          "name": "BigInt",
          "url": "https://github.com/attaswift/BigInt.git",
          "version": "5.5.1",
          "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/BigInt",
          "dependencies": [
          ]
        }
      ]
    }
  ]
}
Fetching https://github.com/keefertaylor/Base58Swift.git
[1/534] Fetching base58swift
Fetched https://github.com/keefertaylor/Base58Swift.git from cache (0.87s)
Fetching https://github.com/attaswift/BigInt.git from cache
Fetched https://github.com/attaswift/BigInt.git from cache (0.42s)
Computing version for https://github.com/attaswift/BigInt.git
Computed https://github.com/attaswift/BigInt.git at 5.5.1 (0.47s)
Creating working copy for https://github.com/keefertaylor/Base58Swift.git
Working copy of https://github.com/keefertaylor/Base58Swift.git resolved at 2.1.14 (1c13ea6)
Creating working copy for https://github.com/attaswift/BigInt.git
Working copy of https://github.com/attaswift/BigInt.git resolved at 5.5.1
warning: '.resolve-product-dependencies': dependency 'base58swift' is not used by any target
Found 1 product dependencies
  - BigInt
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/keefertaylor/Base58Swift.git
https://github.com/keefertaylor/Base58Swift.git
{
  "dependencies" : [
    {
      "identity" : "bigint",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "5.0.0",
            "upper_bound" : "6.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/attaswift/BigInt.git"
    }
  ],
  "manifest_display_name" : "Base58Swift",
  "name" : "Base58Swift",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Base58Swift",
      "targets" : [
        "Base58Swift"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "base58swiftTests",
      "module_type" : "SwiftTarget",
      "name" : "base58swiftTests",
      "path" : "Base58SwiftTests",
      "sources" : [
        "Base58Tests.swift"
      ],
      "target_dependencies" : [
        "Base58Swift"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Base58Swift",
      "module_type" : "SwiftTarget",
      "name" : "Base58Swift",
      "path" : "Base58Swift",
      "product_dependencies" : [
        "BigInt"
      ],
      "product_memberships" : [
        "Base58Swift"
      ],
      "sources" : [
        "Base58.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
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...
[0/3] Write sources
[2/3] Write swift-version-2F0A5646E1D333AE.txt
[4/24] Emitting module BigInt
[5/26] Compiling BigInt GCD.swift
[6/26] Compiling BigInt Hashable.swift
[7/26] Compiling BigInt Subtraction.swift
[8/26] Compiling BigInt Words and Bits.swift
[9/26] Compiling BigInt Shifts.swift
[10/26] Compiling BigInt Square Root.swift
[11/26] Compiling BigInt Integer Conversion.swift
[12/26] Compiling BigInt Multiplication.swift
[13/26] Compiling BigInt Strideable.swift
[14/26] Compiling BigInt String Conversion.swift
[15/26] Compiling BigInt Addition.swift
[16/26] Compiling BigInt BigInt.swift
[17/26] Compiling BigInt BigUInt.swift
[18/26] Compiling BigInt Data Conversion.swift
[19/26] Compiling BigInt Division.swift
[20/26] Compiling BigInt Prime Test.swift
[21/26] Compiling BigInt Random.swift
[22/26] Compiling BigInt Exponentiation.swift
[23/26] Compiling BigInt Floating Point Conversion.swift
[24/26] Compiling BigInt Bitwise Ops.swift
[25/26] Compiling BigInt Codable.swift
[26/26] Compiling BigInt Comparable.swift
[27/28] Compiling Base58Swift Base58.swift
[28/28] Emitting module Base58Swift
Build complete! (5.65s)
Build complete.
{
  "dependencies" : [
    {
      "identity" : "bigint",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "5.0.0",
            "upper_bound" : "6.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/attaswift/BigInt.git"
    }
  ],
  "manifest_display_name" : "Base58Swift",
  "name" : "Base58Swift",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Base58Swift",
      "targets" : [
        "Base58Swift"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "base58swiftTests",
      "module_type" : "SwiftTarget",
      "name" : "base58swiftTests",
      "path" : "Base58SwiftTests",
      "sources" : [
        "Base58Tests.swift"
      ],
      "target_dependencies" : [
        "Base58Swift"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Base58Swift",
      "module_type" : "SwiftTarget",
      "name" : "Base58Swift",
      "path" : "Base58Swift",
      "product_dependencies" : [
        "BigInt"
      ],
      "product_memberships" : [
        "Base58Swift"
      ],
      "sources" : [
        "Base58.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Done.