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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

Failed to build MatomoTracker with Swift 6.1 for watchOS using Xcode 16.3.

Build Command

Build command unavailable

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
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Clone URL: https://github.com/matomo-org/matomo-sdk-ios.git
Reference: develop
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/matomo-org/matomo-sdk-ios
 * branch            develop    -> FETCH_HEAD
 * [new branch]      develop    -> origin/develop
HEAD is now at 3b2dd46 Updated developer dependencies
Cloned https://github.com/matomo-org/matomo-sdk-ios.git
Revision (git rev-parse @):
3b2dd4669112119596213202c3882b6a2371ea27
SUCCESS checkout https://github.com/matomo-org/matomo-sdk-ios.git at develop
========================================
Build
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Selected platform:         watchOS
Swift version:             6.1
Building package at path:  $PWD
https://github.com/matomo-org/matomo-sdk-ios.git
https://github.com/matomo-org/matomo-sdk-ios.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "MatomoTracker",
  "name" : "MatomoTracker",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "MatomoTracker",
      "targets" : [
        "MatomoTracker"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "5"
  ],
  "targets" : [
    {
      "c99name" : "MatomoTracker",
      "module_type" : "SwiftTarget",
      "name" : "MatomoTracker",
      "path" : "MatomoTracker",
      "product_memberships" : [
        "MatomoTracker"
      ],
      "sources" : [
        "Application.swift",
        "CustomDimension.swift",
        "CustomVariable.swift",
        "Device.swift",
        "Dispatcher.swift",
        "Event.swift",
        "EventAPISerializer.swift",
        "Locale+HttpAcceptLanguage.swift",
        "Logger.swift",
        "MainThread.swift",
        "MatomoTracker.swift",
        "MatomoUserDefaults.swift",
        "MemoryQueue.swift",
        "OrderItem.swift",
        "Queue.swift",
        "Session.swift",
        "URLSessionDispatcher.swift",
        "UserAgent.swift",
        "UserDefaultsQueue.swift",
        "Visitor.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Command line invocation:
    /Applications/Xcode-16.3.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
resolved source packages:
{
  "dependencies" : [
  ],
  "manifest_display_name" : "MatomoTracker",
  "name" : "MatomoTracker",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "MatomoTracker",
      "targets" : [
        "MatomoTracker"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "5"
  ],
  "targets" : [
    {
      "c99name" : "MatomoTracker",
      "module_type" : "SwiftTarget",
      "name" : "MatomoTracker",
      "path" : "MatomoTracker",
      "product_memberships" : [
        "MatomoTracker"
      ],
      "sources" : [
        "Application.swift",
        "CustomDimension.swift",
        "CustomVariable.swift",
        "Device.swift",
        "Dispatcher.swift",
        "Event.swift",
        "EventAPISerializer.swift",
        "Locale+HttpAcceptLanguage.swift",
        "Logger.swift",
        "MainThread.swift",
        "MatomoTracker.swift",
        "MatomoUserDefaults.swift",
        "MemoryQueue.swift",
        "OrderItem.swift",
        "Queue.swift",
        "Session.swift",
        "URLSessionDispatcher.swift",
        "UserAgent.swift",
        "UserDefaultsQueue.swift",
        "Visitor.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
{
  "project" : {
    "configurations" : [
      "Debug",
      "Release"
    ],
    "name" : "MatomoTracker",
    "schemes" : [
      "MatomoTracker"
    ],
    "targets" : [
      "MatomoTracker",
      "MatomoTrackerTests"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme MatomoTracker -destination generic/platform=watchOS OTHER_SWIFT_FLAGS=-stats-output-dir .stats -strict-concurrency=complete -enable-upcoming-feature StrictConcurrency -enable-upcoming-feature DisableOutwardActorInference -enable-upcoming-feature GlobalActorIsolatedTypesUsability -enable-upcoming-feature InferSendableFromCaptures
Command line invocation:
    /Applications/Xcode-16.3.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath /Users/admin/builder/spi-builder-workspace/.derivedData build -scheme MatomoTracker -destination generic/platform=watchOS "OTHER_SWIFT_FLAGS=-stats-output-dir .stats -strict-concurrency=complete -enable-upcoming-feature StrictConcurrency -enable-upcoming-feature DisableOutwardActorInference -enable-upcoming-feature GlobalActorIsolatedTypesUsability -enable-upcoming-feature InferSendableFromCaptures"
Build settings from command line:
    OTHER_SWIFT_FLAGS = -stats-output-dir .stats -strict-concurrency=complete -enable-upcoming-feature StrictConcurrency -enable-upcoming-feature DisableOutwardActorInference -enable-upcoming-feature GlobalActorIsolatedTypesUsability -enable-upcoming-feature InferSendableFromCaptures
2025-04-29 01:32:58.209 xcodebuild[576:3259] Writing error result bundle to /var/folders/5k/5yc19ymj0jqd5v0zvgfqz0xw0000gn/T/ResultBundle_2025-29-04_01-32-0058.xcresult
xcodebuild: error: Unable to find a destination matching the provided destination specifier:
		{ generic:1, platform:watchOS }
	Available destinations for the "MatomoTracker" scheme:
		{ platform:macOS, arch:arm64, id:cdb8343944f11ee0bccebc9e3ef9554dd2b11bb3, name:My Mac }
		{ platform:macOS, arch:x86_64, id:cdb8343944f11ee0bccebc9e3ef9554dd2b11bb3, name:My Mac }
		{ platform:iOS, id:dvtdevice-DVTiPhonePlaceholder-iphoneos:placeholder, name:Any iOS Device }
		{ platform:iOS Simulator, id:dvtdevice-DVTiOSDeviceSimulatorPlaceholder-iphonesimulator:placeholder, name:Any iOS Simulator Device }
		{ platform:macOS, name:Any Mac }
		{ platform:tvOS, id:dvtdevice-DVTiOSDevicePlaceholder-appletvos:placeholder, name:Any tvOS Device }
		{ platform:tvOS Simulator, id:dvtdevice-DVTiOSDeviceSimulatorPlaceholder-appletvsimulator:placeholder, name:Any tvOS Simulator Device }
		{ platform:visionOS, id:dvtdevice-DVTiOSDevicePlaceholder-xros:placeholder, name:Any visionOS Device }
		{ platform:visionOS Simulator, id:dvtdevice-DVTiOSDeviceSimulatorPlaceholder-xrsimulator:placeholder, name:Any visionOS Simulator Device }
INFRASTRUCTURE ERROR (status: destinationUnavailable