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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 v1.0.0 (6ab783), with Swift 6.1 for macOS (SPM) on 30 Apr 2025 08:57:45 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: v1.0.0
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/kubens/RRuleKit
 * tag               v1.0.0     -> FETCH_HEAD
HEAD is now at 6ab783a RecurrenceRuleRFC5545FormatStyle (#1)
Cloned https://github.com/kubens/RRuleKit.git
Revision (git rev-parse @):
6ab783a022c09021cf307ebaeb588386a8bd07e3
SUCCESS checkout https://github.com/kubens/RRuleKit.git at v1.0.0
========================================
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] Emitting module RRuleKit
[5/5] Compiling RRuleKit RecurrenceRule+FormatStyle.swift
Build complete! (4.80s)
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.