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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 sXPC, reference main (6d743b), with Swift 6.1 for watchOS using Xcode 16.3 on 28 Apr 2025 07:36:22 UTC.

Build Command

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

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/Alkenso/sXPC.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/Alkenso/sXPC
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 6d743ba Update README.md
Cloned https://github.com/Alkenso/sXPC.git
Revision (git rev-parse @):
6d743ba952197e02468f2a3a51bf13be27ddbdee
SUCCESS checkout https://github.com/Alkenso/sXPC.git at main
========================================
Build
========================================
Selected platform:         watchOS
Swift version:             6.1
Building package at path:  $PWD
https://github.com/Alkenso/sXPC.git
https://github.com/Alkenso/sXPC.git
{
  "dependencies" : [
    {
      "identity" : "swiftspellbook",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "0.3.3",
            "upper_bound" : "1.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/Alkenso/SwiftSpellbook.git"
    }
  ],
  "manifest_display_name" : "sXPC",
  "name" : "sXPC",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.15"
    }
  ],
  "products" : [
    {
      "name" : "sXPC",
      "targets" : [
        "sXPC"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "sXPCTests",
      "module_type" : "SwiftTarget",
      "name" : "sXPCTests",
      "path" : "Tests/sXPCTests",
      "product_dependencies" : [
        "SpellbookFoundation",
        "SpellbookTestUtils"
      ],
      "sources" : [
        "XPCClientTests.swift",
        "XPCTransportTests.swift"
      ],
      "target_dependencies" : [
        "sXPC"
      ],
      "type" : "test"
    },
    {
      "c99name" : "sXPC",
      "module_type" : "SwiftTarget",
      "name" : "sXPC",
      "path" : "Sources/sXPC",
      "product_dependencies" : [
        "SpellbookFoundation"
      ],
      "product_memberships" : [
        "sXPC"
      ],
      "sources" : [
        "XPC Transport/XPCTransportConnection.swift",
        "XPC Transport/XPCTransportListener.swift",
        "XPC Transport/XPCTransportMessage.swift",
        "XPC Transport/XPCTransportUtils.swift",
        "XPCConnection/Utils.swift",
        "XPCConnection/XPCClient.swift",
        "XPCConnection/XPCConnection.swift",
        "XPCConnection/XPCInterface.swift",
        "XPCConnection/XPCListener.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.7"
}
Command line invocation:
    /Applications/Xcode-16.3.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
Fetching from https://github.com/Alkenso/SwiftSpellbook.git
Creating working copy of package ‘SwiftSpellbook’
Checking out 0.4.2 of package ‘SwiftSpellbook’
Resolve Package Graph
Resolved source packages:
  SwiftSpellbook: https://github.com/Alkenso/SwiftSpellbook.git @ 0.4.2
  sXPC: /Users/admin/builder/spi-builder-workspace
resolved source packages: SwiftSpellbook, sXPC
{
  "dependencies" : [
    {
      "identity" : "swiftspellbook",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "0.3.3",
            "upper_bound" : "1.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/Alkenso/SwiftSpellbook.git"
    }
  ],
  "manifest_display_name" : "sXPC",
  "name" : "sXPC",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.15"
    }
  ],
  "products" : [
    {
      "name" : "sXPC",
      "targets" : [
        "sXPC"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "sXPCTests",
      "module_type" : "SwiftTarget",
      "name" : "sXPCTests",
      "path" : "Tests/sXPCTests",
      "product_dependencies" : [
        "SpellbookFoundation",
        "SpellbookTestUtils"
      ],
      "sources" : [
        "XPCClientTests.swift",
        "XPCTransportTests.swift"
      ],
      "target_dependencies" : [
        "sXPC"
      ],
      "type" : "test"
    },
    {
      "c99name" : "sXPC",
      "module_type" : "SwiftTarget",
      "name" : "sXPC",
      "path" : "Sources/sXPC",
      "product_dependencies" : [
        "SpellbookFoundation"
      ],
      "product_memberships" : [
        "sXPC"
      ],
      "sources" : [
        "XPC Transport/XPCTransportConnection.swift",
        "XPC Transport/XPCTransportListener.swift",
        "XPC Transport/XPCTransportMessage.swift",
        "XPC Transport/XPCTransportUtils.swift",
        "XPCConnection/Utils.swift",
        "XPCConnection/XPCClient.swift",
        "XPCConnection/XPCConnection.swift",
        "XPCConnection/XPCInterface.swift",
        "XPCConnection/XPCListener.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.7"
}
{
  "workspace" : {
    "name" : "spi-builder-workspace",
    "schemes" : [
      "sXPC"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme sXPC -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 sXPC -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
Resolve Package Graph
Resolve Package Graph
Resolved source packages:
  sXPC: /Users/admin/builder/spi-builder-workspace
  SwiftSpellbook: https://github.com/Alkenso/SwiftSpellbook.git @ 0.4.2
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (5 targets)
    Target 'sXPC' in project 'sXPC'
        ➜ Explicit dependency on target 'sXPC' in project 'sXPC'
        ➜ Explicit dependency on target 'SpellbookFoundation' in project 'SwiftSpellbook'
    Target 'sXPC' in project 'sXPC'
        ➜ Explicit dependency on target 'SpellbookFoundation' in project 'SwiftSpellbook'
    Target 'SpellbookFoundation' in project 'SwiftSpellbook'
        ➜ Explicit dependency on target 'SpellbookFoundation' in project 'SwiftSpellbook'
        ➜ Explicit dependency on target 'SpellbookFoundationObjC' in project 'SwiftSpellbook'
    Target 'SpellbookFoundation' in project 'SwiftSpellbook'
        ➜ Explicit dependency on target 'SpellbookFoundationObjC' in project 'SwiftSpellbook'
    Target 'SpellbookFoundationObjC' in project 'SwiftSpellbook' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
ExecuteExternalTool /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -arch arm64 -isysroot /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS11.4.sdk -x objective-c++ -c /dev/null
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
ExecuteExternalTool /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -arch arm64 -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/clang -v -E -dM -arch armv7k -isysroot /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS11.4.sdk -x objective-c++ -c /dev/null
ExecuteExternalTool /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -arch armv7k -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/clang -v -E -dM -arch arm64_32 -isysroot /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS11.4.sdk -x objective-c++ -c /dev/null
ExecuteExternalTool /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -arch arm64_32 -isysroot /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS11.4.sdk -x c -c /dev/null
Build description signature: 75e918e1d7dce30cd3c5336775595c2c
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/75e918e1d7dce30cd3c5336775595c2c.xcbuilddata
error: The package product 'SpellbookFoundation' requires minimum platform version 6.0 for the watchOS platform, but this target supports 5.0 (in target 'sXPC' from project 'sXPC')
** BUILD FAILED **
The following build commands failed:
	Building workspace spi-builder-workspace with scheme sXPC
(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
Resolve Package Graph
Resolved source packages:
  sXPC: /Users/admin/builder/spi-builder-workspace
  SwiftSpellbook: https://github.com/Alkenso/SwiftSpellbook.git @ 0.4.2
resolved source packages: sXPC, SwiftSpellbook
{
  "dependencies" : [
    {
      "identity" : "swiftspellbook",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "0.3.3",
            "upper_bound" : "1.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/Alkenso/SwiftSpellbook.git"
    }
  ],
  "manifest_display_name" : "sXPC",
  "name" : "sXPC",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.15"
    }
  ],
  "products" : [
    {
      "name" : "sXPC",
      "targets" : [
        "sXPC"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "sXPCTests",
      "module_type" : "SwiftTarget",
      "name" : "sXPCTests",
      "path" : "Tests/sXPCTests",
      "product_dependencies" : [
        "SpellbookFoundation",
        "SpellbookTestUtils"
      ],
      "sources" : [
        "XPCClientTests.swift",
        "XPCTransportTests.swift"
      ],
      "target_dependencies" : [
        "sXPC"
      ],
      "type" : "test"
    },
    {
      "c99name" : "sXPC",
      "module_type" : "SwiftTarget",
      "name" : "sXPC",
      "path" : "Sources/sXPC",
      "product_dependencies" : [
        "SpellbookFoundation"
      ],
      "product_memberships" : [
        "sXPC"
      ],
      "sources" : [
        "XPC Transport/XPCTransportConnection.swift",
        "XPC Transport/XPCTransportListener.swift",
        "XPC Transport/XPCTransportMessage.swift",
        "XPC Transport/XPCTransportUtils.swift",
        "XPCConnection/Utils.swift",
        "XPCConnection/XPCClient.swift",
        "XPCConnection/XPCConnection.swift",
        "XPCConnection/XPCInterface.swift",
        "XPCConnection/XPCListener.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.7"
}
{
  "workspace" : {
    "name" : "spi-builder-workspace",
    "schemes" : [
      "sXPC"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme sXPC -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 sXPC -destination generic/platform=watchOS
Resolve Package Graph
Resolved source packages:
  sXPC: /Users/admin/builder/spi-builder-workspace
  SwiftSpellbook: https://github.com/Alkenso/SwiftSpellbook.git @ 0.4.2
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (5 targets)
    Target 'sXPC' in project 'sXPC'
        ➜ Explicit dependency on target 'sXPC' in project 'sXPC'
        ➜ Explicit dependency on target 'SpellbookFoundation' in project 'SwiftSpellbook'
    Target 'sXPC' in project 'sXPC'
        ➜ Explicit dependency on target 'SpellbookFoundation' in project 'SwiftSpellbook'
    Target 'SpellbookFoundation' in project 'SwiftSpellbook'
        ➜ Explicit dependency on target 'SpellbookFoundation' in project 'SwiftSpellbook'
        ➜ Explicit dependency on target 'SpellbookFoundationObjC' in project 'SwiftSpellbook'
    Target 'SpellbookFoundation' in project 'SwiftSpellbook'
        ➜ Explicit dependency on target 'SpellbookFoundationObjC' in project 'SwiftSpellbook'
    Target 'SpellbookFoundationObjC' in project 'SwiftSpellbook' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
ExecuteExternalTool /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -arch arm64 -isysroot /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS11.4.sdk -x objective-c++ -c /dev/null
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
ExecuteExternalTool /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -arch arm64 -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/clang -v -E -dM -arch armv7k -isysroot /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS11.4.sdk -x objective-c++ -c /dev/null
ExecuteExternalTool /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -arch armv7k -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/clang -v -E -dM -arch arm64_32 -isysroot /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS11.4.sdk -x objective-c++ -c /dev/null
ExecuteExternalTool /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -arch arm64_32 -isysroot /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS11.4.sdk -x c -c /dev/null
Build description signature: c93463c49713dae72fd3383d249c67a9
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/c93463c49713dae72fd3383d249c67a9.xcbuilddata
error: The package product 'SpellbookFoundation' requires minimum platform version 6.0 for the watchOS platform, but this target supports 5.0 (in target 'sXPC' from project 'sXPC')
** BUILD FAILED **
The following build commands failed:
	Building workspace spi-builder-workspace with scheme sXPC
(1 failure)
BUILD FAILURE 6.1 watchOS