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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 Deferred with Swift 6.1 for visionOS using Xcode 16.3.

Build Command

Build command unavailable

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/bignerdranch/Deferred.git
Reference: develop
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/bignerdranch/Deferred
 * branch            develop    -> FETCH_HEAD
 * [new branch]      develop    -> origin/develop
HEAD is now at c82b9ef Add concurrency migration guide
Cloned https://github.com/bignerdranch/Deferred.git
Revision (git rev-parse @):
c82b9ef73132ac88a768b9e2fdbab7765346c61d
SUCCESS checkout https://github.com/bignerdranch/Deferred.git at develop
========================================
Build
========================================
Selected platform:         visionOS
Swift version:             6.1
Building package at path:  $PWD
https://github.com/bignerdranch/Deferred.git
https://github.com/bignerdranch/Deferred.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Deferred",
  "name" : "Deferred",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.12"
    },
    {
      "name" : "ios",
      "version" : "10.0"
    },
    {
      "name" : "watchos",
      "version" : "3.0"
    },
    {
      "name" : "tvos",
      "version" : "10.0"
    }
  ],
  "products" : [
    {
      "name" : "Deferred",
      "targets" : [
        "Deferred",
        "Task"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "TaskTests",
      "module_type" : "SwiftTarget",
      "name" : "TaskTests",
      "path" : "Tests/TaskTests",
      "sources" : [
        "AllTestsCommon.swift",
        "TaskAsyncTests.swift",
        "TaskCompositionTests.swift",
        "TaskComprehensiveTests.swift",
        "TaskProgressTests.swift",
        "TaskProtocolTests.swift",
        "TaskResultTests.swift",
        "TaskTests.swift"
      ],
      "target_dependencies" : [
        "Deferred",
        "Task"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Task",
      "module_type" : "SwiftTarget",
      "name" : "Task",
      "path" : "Sources/Task",
      "product_memberships" : [
        "Deferred"
      ],
      "sources" : [
        "Either.swift",
        "ExistentialTask.swift",
        "Progress+ExplicitComposition.swift",
        "Progress+Future.swift",
        "Task.swift",
        "TaskAndThen.swift",
        "TaskAsync.swift",
        "TaskChain.swift",
        "TaskCollections.swift",
        "TaskComposition.swift",
        "TaskEveryMap.swift",
        "TaskFallback.swift",
        "TaskIgnore.swift",
        "TaskMap.swift",
        "TaskPromise.swift",
        "TaskRecovery.swift",
        "TaskResult.swift",
        "TaskUpon.swift"
      ],
      "target_dependencies" : [
        "Deferred",
        "CAtomics"
      ],
      "type" : "library"
    },
    {
      "c99name" : "DeferredTests",
      "module_type" : "SwiftTarget",
      "name" : "DeferredTests",
      "path" : "Tests/DeferredTests",
      "sources" : [
        "AllTestsCommon.swift",
        "DeferredTests.swift",
        "ExistentialFutureTests.swift",
        "FilledDeferredTests.swift",
        "FutureAsyncTests.swift",
        "FutureCustomExecutorTests.swift",
        "FutureIgnoreTests.swift",
        "FutureTests.swift",
        "ObjectDeferredTests.swift",
        "PerformanceTests.swift",
        "ProtectedTests.swift",
        "SwiftBugTests.swift"
      ],
      "target_dependencies" : [
        "Deferred"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Deferred",
      "module_type" : "SwiftTarget",
      "name" : "Deferred",
      "path" : "Sources/Deferred",
      "product_memberships" : [
        "Deferred"
      ],
      "sources" : [
        "Atomics.swift",
        "Deferred.swift",
        "DeferredQueue.swift",
        "DeferredVariant.swift",
        "Executor.swift",
        "ExistentialFuture.swift",
        "Future.swift",
        "FutureAndThen.swift",
        "FutureAsync.swift",
        "FutureCollections.swift",
        "FutureComposition.swift",
        "FutureEveryMap.swift",
        "FutureIgnore.swift",
        "FutureMap.swift",
        "FuturePeek.swift",
        "FutureUpon.swift",
        "Locking.swift",
        "Promise.swift",
        "Protected.swift"
      ],
      "target_dependencies" : [
        "CAtomics"
      ],
      "type" : "library"
    },
    {
      "c99name" : "CAtomics",
      "module_type" : "ClangTarget",
      "name" : "CAtomics",
      "path" : "Sources/CAtomics",
      "product_memberships" : [
        "Deferred"
      ],
      "sources" : [
        "Empty.c"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.1"
}
warning: 'spi-builder-workspace': Invalid Exclude '/Users/admin/builder/spi-builder-workspace/Tests/DeferredTests/Tests/AllTestsCommon.swift': File not found.
warning: 'spi-builder-workspace': Invalid Exclude '/Users/admin/builder/spi-builder-workspace/Tests/TaskTests/Tests/AllTestsCommon.swift': File not found.
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" : "Deferred",
  "name" : "Deferred",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.12"
    },
    {
      "name" : "ios",
      "version" : "10.0"
    },
    {
      "name" : "watchos",
      "version" : "3.0"
    },
    {
      "name" : "tvos",
      "version" : "10.0"
    }
  ],
  "products" : [
    {
      "name" : "Deferred",
      "targets" : [
        "Deferred",
        "Task"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "TaskTests",
      "module_type" : "SwiftTarget",
      "name" : "TaskTests",
      "path" : "Tests/TaskTests",
      "sources" : [
        "AllTestsCommon.swift",
        "TaskAsyncTests.swift",
        "TaskCompositionTests.swift",
        "TaskComprehensiveTests.swift",
        "TaskProgressTests.swift",
        "TaskProtocolTests.swift",
        "TaskResultTests.swift",
        "TaskTests.swift"
      ],
      "target_dependencies" : [
        "Deferred",
        "Task"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Task",
      "module_type" : "SwiftTarget",
      "name" : "Task",
      "path" : "Sources/Task",
      "product_memberships" : [
        "Deferred"
      ],
      "sources" : [
        "Either.swift",
        "ExistentialTask.swift",
        "Progress+ExplicitComposition.swift",
        "Progress+Future.swift",
        "Task.swift",
        "TaskAndThen.swift",
        "TaskAsync.swift",
        "TaskChain.swift",
        "TaskCollections.swift",
        "TaskComposition.swift",
        "TaskEveryMap.swift",
        "TaskFallback.swift",
        "TaskIgnore.swift",
        "TaskMap.swift",
        "TaskPromise.swift",
        "TaskRecovery.swift",
        "TaskResult.swift",
        "TaskUpon.swift"
      ],
      "target_dependencies" : [
        "Deferred",
        "CAtomics"
      ],
      "type" : "library"
    },
    {
      "c99name" : "DeferredTests",
      "module_type" : "SwiftTarget",
      "name" : "DeferredTests",
      "path" : "Tests/DeferredTests",
      "sources" : [
        "AllTestsCommon.swift",
        "DeferredTests.swift",
        "ExistentialFutureTests.swift",
        "FilledDeferredTests.swift",
        "FutureAsyncTests.swift",
        "FutureCustomExecutorTests.swift",
        "FutureIgnoreTests.swift",
        "FutureTests.swift",
        "ObjectDeferredTests.swift",
        "PerformanceTests.swift",
        "ProtectedTests.swift",
        "SwiftBugTests.swift"
      ],
      "target_dependencies" : [
        "Deferred"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Deferred",
      "module_type" : "SwiftTarget",
      "name" : "Deferred",
      "path" : "Sources/Deferred",
      "product_memberships" : [
        "Deferred"
      ],
      "sources" : [
        "Atomics.swift",
        "Deferred.swift",
        "DeferredQueue.swift",
        "DeferredVariant.swift",
        "Executor.swift",
        "ExistentialFuture.swift",
        "Future.swift",
        "FutureAndThen.swift",
        "FutureAsync.swift",
        "FutureCollections.swift",
        "FutureComposition.swift",
        "FutureEveryMap.swift",
        "FutureIgnore.swift",
        "FutureMap.swift",
        "FuturePeek.swift",
        "FutureUpon.swift",
        "Locking.swift",
        "Promise.swift",
        "Protected.swift"
      ],
      "target_dependencies" : [
        "CAtomics"
      ],
      "type" : "library"
    },
    {
      "c99name" : "CAtomics",
      "module_type" : "ClangTarget",
      "name" : "CAtomics",
      "path" : "Sources/CAtomics",
      "product_memberships" : [
        "Deferred"
      ],
      "sources" : [
        "Empty.c"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.1"
}
warning: 'spi-builder-workspace': Invalid Exclude '/Users/admin/builder/spi-builder-workspace/Tests/DeferredTests/Tests/AllTestsCommon.swift': File not found.
warning: 'spi-builder-workspace': Invalid Exclude '/Users/admin/builder/spi-builder-workspace/Tests/TaskTests/Tests/AllTestsCommon.swift': File not found.
{
  "project" : {
    "configurations" : [
      "Debug",
      "Release"
    ],
    "name" : "Deferred",
    "schemes" : [
      "Deferred"
    ],
    "targets" : [
      "Deferred",
      "DeferredTests"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme Deferred -destination generic/platform=xrOS 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 Deferred -destination generic/platform=xrOS "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
2025-04-26 20:42:25.114 xcodebuild[576:3291] Writing error result bundle to /var/folders/5k/5yc19ymj0jqd5v0zvgfqz0xw0000gn/T/ResultBundle_2025-26-04_20-42-0025.xcresult
xcodebuild: error: Unable to find a destination matching the provided destination specifier:
		{ generic:1, platform:xrOS }
	Available destinations for the "Deferred" scheme:
		{ platform:macOS, arch:arm64, id:5f7fdb2079e80168bd33eaed31c333fcb4072ed2, name:My Mac }
		{ platform:macOS, arch:x86_64, id:5f7fdb2079e80168bd33eaed31c333fcb4072ed2, name:My Mac }
		{ platform:macOS, arch:arm64, variant:Mac Catalyst, id:5f7fdb2079e80168bd33eaed31c333fcb4072ed2, name:My Mac }
		{ platform:macOS, arch:x86_64, variant:Mac Catalyst, id:5f7fdb2079e80168bd33eaed31c333fcb4072ed2, name:My Mac }
		{ platform:macOS, arch:arm64, variant:Designed for [iPad,iPhone], id:5f7fdb2079e80168bd33eaed31c333fcb4072ed2, 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:macOS, variant:Mac Catalyst, 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:watchOS, id:dvtdevice-DVTiOSDevicePlaceholder-watchos:placeholder, name:Any watchOS Device }
		{ platform:watchOS Simulator, id:dvtdevice-DVTiOSDeviceSimulatorPlaceholder-watchsimulator:placeholder, name:Any watchOS Simulator Device }
INFRASTRUCTURE ERROR (status: destinationUnavailable