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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 0.7.0 (b67578), with Swift 5.10 for macOS (SPM) on 18 Apr 2025 00:10:59 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: 0.7.0
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/swhitty/KeyValueCoder
 * tag               0.7.0      -> FETCH_HEAD
HEAD is now at b675789 Swift 6.1
Cloned https://github.com/swhitty/KeyValueCoder.git
Revision (git rev-parse @):
b6757897de7d616fd614158f37fd2b178578caf0
SUCCESS checkout https://github.com/swhitty/KeyValueCoder.git at 0.7.0
========================================
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] Compiling KeyValueCoder KeyValueDecoder.swift
[6/6] Emitting module KeyValueCoder
Build complete! (4.54s)
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.