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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 KeyValueCoder, reference main (867e27), with Swift 5.10 for macOS (SPM) on 18 Apr 2025 00:10:58 UTC.

Swift 6 data race errors: 0

Build Command

env DEVELOPER_DIR=/Applications/Xcode-15.4.0.app xcrun swift build --arch arm64

Build Log

========================================
RunAll
========================================
Builder version: 4.60.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/swhitty/KeyValueCoder.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/swhitty/KeyValueCoder
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 867e27b Update README.md
Cloned https://github.com/swhitty/KeyValueCoder.git
Revision (git rev-parse @):
867e27b996141badb657c6eb6161d2b8f455fb74
SUCCESS checkout https://github.com/swhitty/KeyValueCoder.git at main
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             5.10
Building package at path:  $PWD
https://github.com/swhitty/KeyValueCoder.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-15.4.0.app xcrun swift build --arch arm64
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-33747A42983211AE.txt
[3/6] Compiling KeyValueCoder UserDefaults+Codable.swift
[4/6] Compiling KeyValueCoder KeyValueEncoder.swift
/Users/admin/builder/spi-builder-workspace/Sources/KeyValueEncoder.swift:69:120: warning: converting non-sendable function value to '@Sendable (Any) -> Bool' may introduce data races
    public static var `default`: NilCodingStrategy { .placeholder(Optional<any Sendable>.none as any Sendable, isNull: isOptionalNone) }
                                                                                                                       ^
[5/6] Emitting module KeyValueCoder
[6/6] Compiling KeyValueCoder KeyValueDecoder.swift
Build complete! (4.61s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "KeyValueCoder",
  "name" : "KeyValueCoder",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "13.0"
    },
    {
      "name" : "ios",
      "version" : "15.0"
    },
    {
      "name" : "tvos",
      "version" : "15.0"
    },
    {
      "name" : "watchos",
      "version" : "8.0"
    }
  ],
  "products" : [
    {
      "name" : "KeyValueCoder",
      "targets" : [
        "KeyValueCoder"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "KeyValueCoderTests",
      "module_type" : "SwiftTarget",
      "name" : "KeyValueCoderTests",
      "path" : "Tests",
      "sources" : [
        "KeyValueDecoderTests.swift",
        "KeyValueDecoderXCTests.swift",
        "KeyValueEncoderTests.swift",
        "KeyValueEncoderXCTests.swift",
        "UserDefaults+CodableTests.swift",
        "UserDefaults+CodableXCTests.swift"
      ],
      "target_dependencies" : [
        "KeyValueCoder"
      ],
      "type" : "test"
    },
    {
      "c99name" : "KeyValueCoder",
      "module_type" : "SwiftTarget",
      "name" : "KeyValueCoder",
      "path" : "Sources",
      "product_memberships" : [
        "KeyValueCoder"
      ],
      "sources" : [
        "KeyValueDecoder.swift",
        "KeyValueEncoder.swift",
        "UserDefaults+Codable.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.9"
}
Done.