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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 Cachy, reference master (b5f8db), with Swift 6.1 for watchOS using Xcode 16.3 on 26 Apr 2025 11:26:46 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme Cachy-Package -destination generic/platform=watchOS

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/Sadmansamee/CachyKit.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/Sadmansamee/CachyKit
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at b5f8dbe Update README.md
Cloned https://github.com/Sadmansamee/CachyKit.git
Revision (git rev-parse @):
b5f8dbed3f2903591ec1718fdc0b55d261797db4
SUCCESS checkout https://github.com/Sadmansamee/CachyKit.git at master
========================================
Build
========================================
Selected platform:         watchOS
Swift version:             6.1
Building package at path:  $PWD
https://github.com/Sadmansamee/CachyKit.git
https://github.com/Sadmansamee/CachyKit.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Cachy",
  "name" : "Cachy",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Cachy",
      "targets" : [
        "Cachy"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "CachyTests",
      "module_type" : "SwiftTarget",
      "name" : "CachyTests",
      "path" : "Tests/CachyTests",
      "sources" : [
        "CachyTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "Cachy"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Cachy",
      "module_type" : "SwiftTarget",
      "name" : "Cachy",
      "path" : "Sources/Cachy",
      "product_memberships" : [
        "Cachy"
      ],
      "sources" : [
        "Cachy.swift",
        "CachyLoader.swift",
        "CachyObject.swift",
        "CachyUIImage.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" : "Cachy",
  "name" : "Cachy",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Cachy",
      "targets" : [
        "Cachy"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "CachyTests",
      "module_type" : "SwiftTarget",
      "name" : "CachyTests",
      "path" : "Tests/CachyTests",
      "sources" : [
        "CachyTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "Cachy"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Cachy",
      "module_type" : "SwiftTarget",
      "name" : "Cachy",
      "path" : "Sources/Cachy",
      "product_memberships" : [
        "Cachy"
      ],
      "sources" : [
        "Cachy.swift",
        "CachyLoader.swift",
        "CachyObject.swift",
        "CachyUIImage.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
{
  "project" : {
    "configurations" : [
      "Debug",
      "Release"
    ],
    "name" : "Cachy",
    "schemes" : [
      "Cachy-Package"
    ],
    "targets" : [
      "Cachy",
      "CachyPackageDescription",
      "CachyPackageTests",
      "CachyTests"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme Cachy-Package -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 Cachy-Package -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
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (1 target)
    Target 'Cachy' in project 'Cachy' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
ExecuteExternalTool /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -isysroot /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS11.4.sdk -x c -c /dev/null
ExecuteExternalTool /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc --version
ExecuteExternalTool /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld -version_details
Build description signature: 1007dca39ed4a74e972d2cb0d601a3e2
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/1007dca39ed4a74e972d2cb0d601a3e2.xcbuilddata
/Users/admin/builder/spi-builder-workspace/Cachy.xcodeproj:1:1: error: Unable to open base configuration reference file '/Users/admin/builder/spi-builder-workspace/Pods/Target Support Files/Pods-Cachy/Pods-Cachy.debug.xcconfig'. (in target 'Cachy' from project 'Cachy')
/Users/admin/builder/spi-builder-workspace/Cachy.xcodeproj: warning: The watchOS deployment target 'WATCHOS_DEPLOYMENT_TARGET' is set to 2.0, but the range of supported deployment target versions is 4.0 to 11.4.99. (in target 'Cachy' from project 'Cachy')
** BUILD FAILED **
The following build commands failed:
	Building project Cachy with scheme Cachy-Package
(1 failure)
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" : "Cachy",
  "name" : "Cachy",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Cachy",
      "targets" : [
        "Cachy"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "CachyTests",
      "module_type" : "SwiftTarget",
      "name" : "CachyTests",
      "path" : "Tests/CachyTests",
      "sources" : [
        "CachyTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "Cachy"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Cachy",
      "module_type" : "SwiftTarget",
      "name" : "Cachy",
      "path" : "Sources/Cachy",
      "product_memberships" : [
        "Cachy"
      ],
      "sources" : [
        "Cachy.swift",
        "CachyLoader.swift",
        "CachyObject.swift",
        "CachyUIImage.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
{
  "project" : {
    "configurations" : [
      "Debug",
      "Release"
    ],
    "name" : "Cachy",
    "schemes" : [
      "Cachy-Package"
    ],
    "targets" : [
      "Cachy",
      "CachyPackageDescription",
      "CachyPackageTests",
      "CachyTests"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme Cachy-Package -destination generic/platform=watchOS
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 Cachy-Package -destination generic/platform=watchOS
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (1 target)
    Target 'Cachy' in project 'Cachy' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
ExecuteExternalTool /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -isysroot /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS11.4.sdk -x c -c /dev/null
ExecuteExternalTool /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc --version
ExecuteExternalTool /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld -version_details
Build description signature: 7ab0937af2978ac3d8c9c737254e56a5
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/7ab0937af2978ac3d8c9c737254e56a5.xcbuilddata
/Users/admin/builder/spi-builder-workspace/Cachy.xcodeproj:1:1: error: Unable to open base configuration reference file '/Users/admin/builder/spi-builder-workspace/Pods/Target Support Files/Pods-Cachy/Pods-Cachy.debug.xcconfig'. (in target 'Cachy' from project 'Cachy')
/Users/admin/builder/spi-builder-workspace/Cachy.xcodeproj: warning: The watchOS deployment target 'WATCHOS_DEPLOYMENT_TARGET' is set to 2.0, but the range of supported deployment target versions is 4.0 to 11.4.99. (in target 'Cachy' from project 'Cachy')
** BUILD FAILED **
The following build commands failed:
	Building project Cachy with scheme Cachy-Package
(1 failure)
BUILD FAILURE 6.1 watchOS