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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 swift-concurrency-extras, reference main (0a250b), with Swift 6.1 for macOS (SPM) on 30 Apr 2025 04:17:58 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/pointfreeco/swift-concurrency-extras.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/pointfreeco/swift-concurrency-extras
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 0a250bb Update README.md
Cloned https://github.com/pointfreeco/swift-concurrency-extras.git
Revision (git rev-parse @):
0a250bb1029e1e439b9523e61e2bef65842072b2
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/pointfreeco/swift-concurrency-extras.git at main
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/pointfreeco/swift-concurrency-extras.git
https://github.com/pointfreeco/swift-concurrency-extras.git
{
  "dependencies" : [
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      "identity" : "swift-docc-plugin",
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  "manifest_display_name" : "swift-concurrency-extras",
  "name" : "swift-concurrency-extras",
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  "platforms" : [
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      "version" : "13.0"
    },
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      "name" : "macos",
      "version" : "10.15"
    },
    {
      "name" : "tvos",
      "version" : "13.0"
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    {
      "name" : "watchos",
      "version" : "6.0"
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  "products" : [
    {
      "name" : "ConcurrencyExtras",
      "targets" : [
        "ConcurrencyExtras"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "6"
  ],
  "targets" : [
    {
      "c99name" : "ConcurrencyExtrasTests",
      "module_type" : "SwiftTarget",
      "name" : "ConcurrencyExtrasTests",
      "path" : "Tests/ConcurrencyExtrasTests",
      "sources" : [
        "ActorIsolatedTests.swift",
        "AnyHashableSendableTests.swift",
        "AsyncStreamTests.swift",
        "LockIsolatedTests.swift",
        "MainSerialExecutorTests.swift",
        "ResultTests.swift"
      ],
      "target_dependencies" : [
        "ConcurrencyExtras"
      ],
      "type" : "test"
    },
    {
      "c99name" : "ConcurrencyExtras",
      "module_type" : "SwiftTarget",
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      "product_memberships" : [
        "ConcurrencyExtras"
      ],
      "sources" : [
        "ActorIsolated.swift",
        "AnyHashableSendable.swift",
        "AsyncStream.swift",
        "AsyncThrowingStream.swift",
        "Internal/Locking.swift",
        "Internal/UncheckedBox.swift",
        "LockIsolated.swift",
        "MainSerialExecutor.swift",
        "Result.swift",
        "Task.swift",
        "UncheckedSendable.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
[1/1] Compiling plugin Swift-DocC Preview
[2/2] Compiling plugin Swift-DocC
Building for debugging...
[2/4] Write sources
[3/4] Write swift-version-2F0A5646E1D333AE.txt
[5/15] Compiling ConcurrencyExtras Result.swift
[6/15] Compiling ConcurrencyExtras LockIsolated.swift
[7/15] Compiling ConcurrencyExtras Task.swift
[8/16] Compiling ConcurrencyExtras MainSerialExecutor.swift
[9/16] Compiling ConcurrencyExtras AsyncThrowingStream.swift
[10/16] Compiling ConcurrencyExtras UncheckedBox.swift
[11/16] Compiling ConcurrencyExtras ActorIsolated.swift
[12/16] Compiling ConcurrencyExtras AnyHashableSendable.swift
[13/16] Compiling ConcurrencyExtras AsyncStream.swift
[14/16] Emitting module ConcurrencyExtras
[15/16] Compiling ConcurrencyExtras Locking.swift
[16/16] Compiling ConcurrencyExtras UncheckedSendable.swift
Build complete! (18.28s)
Fetching https://github.com/apple/swift-docc-plugin
[1/2049] Fetching swift-docc-plugin
Fetched https://github.com/apple/swift-docc-plugin from cache (1.12s)
Computing version for https://github.com/apple/swift-docc-plugin
Computed https://github.com/apple/swift-docc-plugin at 1.4.3 (2.03s)
Fetching https://github.com/swiftlang/swift-docc-symbolkit from cache
Fetched https://github.com/swiftlang/swift-docc-symbolkit from cache (0.74s)
Computing version for https://github.com/swiftlang/swift-docc-symbolkit
Computed https://github.com/swiftlang/swift-docc-symbolkit at 1.0.0 (1.36s)
Creating working copy for https://github.com/swiftlang/swift-docc-symbolkit
Working copy of https://github.com/swiftlang/swift-docc-symbolkit resolved at 1.0.0
Creating working copy for https://github.com/apple/swift-docc-plugin
Working copy of https://github.com/apple/swift-docc-plugin resolved at 1.4.3
Build complete.
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      "requirement" : {
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  "manifest_display_name" : "swift-concurrency-extras",
  "name" : "swift-concurrency-extras",
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    },
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    },
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      "version" : "13.0"
    },
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      "name" : "watchos",
      "version" : "6.0"
    }
  ],
  "products" : [
    {
      "name" : "ConcurrencyExtras",
      "targets" : [
        "ConcurrencyExtras"
      ],
      "type" : {
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        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "6"
  ],
  "targets" : [
    {
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      "name" : "ConcurrencyExtrasTests",
      "path" : "Tests/ConcurrencyExtrasTests",
      "sources" : [
        "ActorIsolatedTests.swift",
        "AnyHashableSendableTests.swift",
        "AsyncStreamTests.swift",
        "LockIsolatedTests.swift",
        "MainSerialExecutorTests.swift",
        "ResultTests.swift"
      ],
      "target_dependencies" : [
        "ConcurrencyExtras"
      ],
      "type" : "test"
    },
    {
      "c99name" : "ConcurrencyExtras",
      "module_type" : "SwiftTarget",
      "name" : "ConcurrencyExtras",
      "path" : "Sources/ConcurrencyExtras",
      "product_memberships" : [
        "ConcurrencyExtras"
      ],
      "sources" : [
        "ActorIsolated.swift",
        "AnyHashableSendable.swift",
        "AsyncStream.swift",
        "AsyncThrowingStream.swift",
        "Internal/Locking.swift",
        "Internal/UncheckedBox.swift",
        "LockIsolated.swift",
        "MainSerialExecutor.swift",
        "Result.swift",
        "Task.swift",
        "UncheckedSendable.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "6.0"
}
Done.