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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 EventSource, reference 0.1.4 (d783b1), with Swift 6.1 for macOS (SPM) on 30 Apr 2025 19:04:56 UTC.

Swift 6 data race errors: 1

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: 4.61.2
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/Recouse/EventSource.git
Reference: 0.1.4
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/Recouse/EventSource
 * tag               0.1.4      -> FETCH_HEAD
HEAD is now at d783b1c Add iOS 15 job to CI (#29)
Cloned https://github.com/Recouse/EventSource.git
Revision (git rev-parse @):
d783b1cf60599dbcec6396c55a6bab33a1c92dc3
SUCCESS checkout https://github.com/Recouse/EventSource.git at 0.1.4
========================================
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": "eventsource",
      "name": "EventSource",
      "url": "https://github.com/Recouse/EventSource.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/EventSource",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/Recouse/EventSource.git
[7/691] Fetching eventsource
Fetched https://github.com/Recouse/EventSource.git from cache (0.71s)
Creating working copy for https://github.com/Recouse/EventSource.git
Working copy of https://github.com/Recouse/EventSource.git resolved at 0.1.4 (d783b1c)
warning: '.resolve-product-dependencies': dependency 'eventsource' is not used by any target
Found 0 product dependencies
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/Recouse/EventSource.git
https://github.com/Recouse/EventSource.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "EventSource",
  "name" : "EventSource",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.15"
    },
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "tvos",
      "version" : "13.0"
    },
    {
      "name" : "watchos",
      "version" : "6.0"
    },
    {
      "name" : "visionos",
      "version" : "1.0"
    }
  ],
  "products" : [
    {
      "name" : "EventSource",
      "targets" : [
        "EventSource"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "EventSourceTests",
      "module_type" : "SwiftTarget",
      "name" : "EventSourceTests",
      "path" : "Tests/EventSourceTests",
      "sources" : [
        "EventParserTests.swift"
      ],
      "target_dependencies" : [
        "EventSource"
      ],
      "type" : "test"
    },
    {
      "c99name" : "EventSource",
      "module_type" : "SwiftTarget",
      "name" : "EventSource",
      "path" : "Sources/EventSource",
      "product_memberships" : [
        "EventSource"
      ],
      "sources" : [
        "EventParser.swift",
        "EventSource.swift",
        "EventSourceError.swift",
        "Extensions.swift",
        "Headers.swift",
        "ServerEvent.swift",
        "SessionDelegate.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
[3/10] Compiling EventSource Extensions.swift
[4/10] Compiling EventSource Headers.swift
[5/10] Compiling EventSource EventSourceError.swift
[6/10] Compiling EventSource SessionDelegate.swift
[7/10] Compiling EventSource ServerEvent.swift
[8/10] Compiling EventSource EventSource.swift
[9/10] Compiling EventSource EventParser.swift
[10/10] Emitting module EventSource
Build complete! (5.22s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "EventSource",
  "name" : "EventSource",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.15"
    },
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "tvos",
      "version" : "13.0"
    },
    {
      "name" : "watchos",
      "version" : "6.0"
    },
    {
      "name" : "visionos",
      "version" : "1.0"
    }
  ],
  "products" : [
    {
      "name" : "EventSource",
      "targets" : [
        "EventSource"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "EventSourceTests",
      "module_type" : "SwiftTarget",
      "name" : "EventSourceTests",
      "path" : "Tests/EventSourceTests",
      "sources" : [
        "EventParserTests.swift"
      ],
      "target_dependencies" : [
        "EventSource"
      ],
      "type" : "test"
    },
    {
      "c99name" : "EventSource",
      "module_type" : "SwiftTarget",
      "name" : "EventSource",
      "path" : "Sources/EventSource",
      "product_memberships" : [
        "EventSource"
      ],
      "sources" : [
        "EventParser.swift",
        "EventSource.swift",
        "EventSourceError.swift",
        "Extensions.swift",
        "Headers.swift",
        "ServerEvent.swift",
        "SessionDelegate.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "6.0"
}
Done.