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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 RRuleKit, reference main (98f254), with Swift 6.1 for macOS (SPM) on 30 Apr 2025 08:58:16 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

Build Log

========================================
RunAll
========================================
Builder version: 4.61.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/kubens/RRuleKit.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/kubens/RRuleKit
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 98f254d support for SPI documentation (#2)
Cloned https://github.com/kubens/RRuleKit.git
Revision (git rev-parse @):
98f254d81d7ddad1258e798c9f4410f31fc3771a
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/kubens/RRuleKit.git at main
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/kubens/RRuleKit.git
https://github.com/kubens/RRuleKit.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "RRuleKit",
  "name" : "RRuleKit",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "18.0"
    },
    {
      "name" : "maccatalyst",
      "version" : "18.0"
    },
    {
      "name" : "macos",
      "version" : "15.0"
    },
    {
      "name" : "tvos",
      "version" : "18.0"
    },
    {
      "name" : "visionos",
      "version" : "2.0"
    },
    {
      "name" : "watchos",
      "version" : "11.0"
    }
  ],
  "products" : [
    {
      "name" : "RRuleKit",
      "targets" : [
        "RRuleKit"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "RRuleKitTests",
      "module_type" : "SwiftTarget",
      "name" : "RRuleKitTests",
      "path" : "Tests/RRuleKitTests",
      "sources" : [
        "RecurrenceRuleRFC5545FormatTests.swift",
        "RecurrenceRuleRFC5545ParseTests.swift"
      ],
      "target_dependencies" : [
        "RRuleKit"
      ],
      "type" : "test"
    },
    {
      "c99name" : "RRuleKit",
      "module_type" : "SwiftTarget",
      "name" : "RRuleKit",
      "path" : "Sources/RRuleKit",
      "product_memberships" : [
        "RRuleKit"
      ],
      "sources" : [
        "RecurrenceRule+FormatStyle.swift",
        "RecurrenceRuleRFC5545FormatStyle.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "6.0"
}
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
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-2F0A5646E1D333AE.txt
[3/5] Compiling RRuleKit RecurrenceRuleRFC5545FormatStyle.swift
[4/5] Compiling RRuleKit RecurrenceRule+FormatStyle.swift
[5/5] Emitting module RRuleKit
Build complete! (4.83s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "RRuleKit",
  "name" : "RRuleKit",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "18.0"
    },
    {
      "name" : "maccatalyst",
      "version" : "18.0"
    },
    {
      "name" : "macos",
      "version" : "15.0"
    },
    {
      "name" : "tvos",
      "version" : "18.0"
    },
    {
      "name" : "visionos",
      "version" : "2.0"
    },
    {
      "name" : "watchos",
      "version" : "11.0"
    }
  ],
  "products" : [
    {
      "name" : "RRuleKit",
      "targets" : [
        "RRuleKit"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "RRuleKitTests",
      "module_type" : "SwiftTarget",
      "name" : "RRuleKitTests",
      "path" : "Tests/RRuleKitTests",
      "sources" : [
        "RecurrenceRuleRFC5545FormatTests.swift",
        "RecurrenceRuleRFC5545ParseTests.swift"
      ],
      "target_dependencies" : [
        "RRuleKit"
      ],
      "type" : "test"
    },
    {
      "c99name" : "RRuleKit",
      "module_type" : "SwiftTarget",
      "name" : "RRuleKit",
      "path" : "Sources/RRuleKit",
      "product_memberships" : [
        "RRuleKit"
      ],
      "sources" : [
        "RecurrenceRule+FormatStyle.swift",
        "RecurrenceRuleRFC5545FormatStyle.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "6.0"
}
Done.