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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 SignalHandler, reference main (bb52b9), with Swift 6.1 for macOS (SPM) on 28 Apr 2025 09:04:53 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 -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/Genaro-Chris/SignalHandler.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/Genaro-Chris/SignalHandler
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at bb52b9c fix the signal handling bug
Cloned https://github.com/Genaro-Chris/SignalHandler.git
Revision (git rev-parse @):
bb52b9c5df6eba21adb6d540a19a2da6e6fab2fa
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/Genaro-Chris/SignalHandler.git at main
Fetching https://github.com/apple/swift-docc-plugin
[1/2049] Fetching swift-docc-plugin
Fetched https://github.com/apple/swift-docc-plugin from cache (1.10s)
Fetching https://github.com/apple/swift-docc-symbolkit
[1/3377] Fetching swift-docc-symbolkit
Fetched https://github.com/apple/swift-docc-symbolkit from cache (1.08s)
Computing version for https://github.com/apple/swift-docc-symbolkit
Computed https://github.com/apple/swift-docc-symbolkit at 1.0.0 (1.75s)
Creating working copy for https://github.com/apple/swift-docc-symbolkit
Working copy of https://github.com/apple/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 main (3aad4aa)
========================================
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": "signalhandler",
      "name": "SignalHandler",
      "url": "https://github.com/Genaro-Chris/SignalHandler.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/SignalHandler",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/Genaro-Chris/SignalHandler.git
[1/1433] Fetching signalhandler
Fetched https://github.com/Genaro-Chris/SignalHandler.git from cache (0.92s)
Creating working copy for https://github.com/Genaro-Chris/SignalHandler.git
Working copy of https://github.com/Genaro-Chris/SignalHandler.git resolved at main (bb52b9c)
warning: '.resolve-product-dependencies': dependency 'signalhandler' 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/Genaro-Chris/SignalHandler.git
https://github.com/Genaro-Chris/SignalHandler.git
{
  "dependencies" : [
    {
      "identity" : "swift-docc-plugin",
      "requirement" : {
        "branch" : [
          "main"
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-docc-plugin"
    }
  ],
  "manifest_display_name" : "SignalHandler",
  "name" : "SignalHandler",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "Linux",
      "version" : "1.0.0"
    },
    {
      "name" : "macos",
      "version" : "10.15"
    }
  ],
  "products" : [
    {
      "name" : "SignalHandler",
      "targets" : [
        "SignalHandler"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SignalHandler",
      "module_type" : "SwiftTarget",
      "name" : "SignalHandler",
      "path" : "Sources/SignalHandler",
      "product_memberships" : [
        "SignalHandler"
      ],
      "sources" : [
        "SignalHandler.swift",
        "Signals.swift",
        "SourceSequence.swift",
        "extensions.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.8"
}
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 -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures
[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
[5/9] Compiling SignalHandler extensions.swift
[6/9] Compiling SignalHandler SourceSequence.swift
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SourceSequence.swift:29:22: warning: sending 'newValue' risks causing data races; this is an error in the Swift 6 language mode
27 |
28 |     fileprivate func appendToStream(newValue: Element) {
29 |         continuation.yield(newValue)
   |                      |- warning: sending 'newValue' risks causing data races; this is an error in the Swift 6 language mode
   |                      `- note: task-isolated 'newValue' is passed as a 'sending' parameter; Uses in callee may race with later task-isolated uses
30 |     }
31 | }
[7/9] Compiling SignalHandler Signals.swift
[8/9] Emitting module SignalHandler
[9/9] Compiling SignalHandler SignalHandler.swift
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:150:22: warning: sending 'completion' risks causing data races; this is an error in the Swift 6 language mode
148 |         with signals: [Signals], completion: @escaping ((Int32) async -> Void)
149 |     ) async {
150 |         let signal = SignalHandler(signals: signals, handler: completion)
    |                      |- warning: sending 'completion' risks causing data races; this is an error in the Swift 6 language mode
    |                      `- note: sending task-isolated 'completion' to actor-isolated initializer 'init(signals:handler:)' risks causing data races between actor-isolated and task-isolated uses
151 |         await signal.start()
152 |     }
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:182:22: warning: sending 'handler' risks causing data races; this is an error in the Swift 6 language mode
180 |         with signals: Signals..., handler: @escaping ((Int32) async -> Void)
181 |     ) async {
182 |         let signal = SignalHandler(signals: signals, handler: handler)
    |                      |- warning: sending 'handler' risks causing data races; this is an error in the Swift 6 language mode
    |                      `- note: sending task-isolated 'handler' to actor-isolated initializer 'init(signals:handler:)' risks causing data races between actor-isolated and task-isolated uses
183 |         await signal.start()
184 |     }
Build complete! (13.49s)
Build complete.
{
  "dependencies" : [
    {
      "identity" : "swift-docc-plugin",
      "requirement" : {
        "branch" : [
          "main"
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-docc-plugin"
    }
  ],
  "manifest_display_name" : "SignalHandler",
  "name" : "SignalHandler",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "Linux",
      "version" : "1.0.0"
    },
    {
      "name" : "macos",
      "version" : "10.15"
    }
  ],
  "products" : [
    {
      "name" : "SignalHandler",
      "targets" : [
        "SignalHandler"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SignalHandler",
      "module_type" : "SwiftTarget",
      "name" : "SignalHandler",
      "path" : "Sources/SignalHandler",
      "product_memberships" : [
        "SignalHandler"
      ],
      "sources" : [
        "SignalHandler.swift",
        "Signals.swift",
        "SourceSequence.swift",
        "extensions.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.8"
}
Done.