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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 SourceMapper, reference main (8fb4bd), with Swift 6.1 for watchOS using Xcode 16.3 on 29 Apr 2025 15:29:59 UTC.

Build Command

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

Build Log

========================================
RunAll
========================================
Builder version: 4.61.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/johnfairh/SourceMapper.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/johnfairh/SourceMapper
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 8fb4bd6 Move CI to Swift 6.1 (#8)
Cloned https://github.com/johnfairh/SourceMapper.git
Revision (git rev-parse @):
8fb4bd6d9eeb064a77642d61b75d396127b71741
SUCCESS checkout https://github.com/johnfairh/SourceMapper.git at main
========================================
Build
========================================
Selected platform:         watchOS
Swift version:             6.1
Building package at path:  $PWD
https://github.com/johnfairh/SourceMapper.git
https://github.com/johnfairh/SourceMapper.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "SourceMapper",
  "name" : "SourceMapper",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "SourceMapper",
      "targets" : [
        "SourceMapper"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "srcmapcat",
      "targets" : [
        "Cli"
      ],
      "type" : {
        "executable" : null
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SourceMapperTests",
      "module_type" : "SwiftTarget",
      "name" : "SourceMapperTests",
      "path" : "Tests/SourceMapperTests",
      "sources" : [
        "TestBasics.swift",
        "TestHelpers.swift",
        "TestJSON.swift",
        "TestMappings.swift",
        "TestVLQ.swift"
      ],
      "target_dependencies" : [
        "SourceMapper"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SourceMapper",
      "module_type" : "SwiftTarget",
      "name" : "SourceMapper",
      "path" : "Sources/SourceMapper",
      "product_memberships" : [
        "SourceMapper",
        "srcmapcat"
      ],
      "sources" : [
        "Errors.swift",
        "JSON.swift",
        "Mappings.swift",
        "SourceMap.swift",
        "UnpackedSourceMap.swift",
        "VLQ.swift"
      ],
      "type" : "library"
    },
    {
      "c99name" : "Cli",
      "module_type" : "SwiftTarget",
      "name" : "Cli",
      "path" : "Sources/Cli",
      "product_memberships" : [
        "srcmapcat"
      ],
      "sources" : [
        "main.swift"
      ],
      "target_dependencies" : [
        "SourceMapper"
      ],
      "type" : "executable"
    }
  ],
  "tools_version" : "6.0"
}
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" : "SourceMapper",
  "name" : "SourceMapper",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "SourceMapper",
      "targets" : [
        "SourceMapper"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "srcmapcat",
      "targets" : [
        "Cli"
      ],
      "type" : {
        "executable" : null
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SourceMapperTests",
      "module_type" : "SwiftTarget",
      "name" : "SourceMapperTests",
      "path" : "Tests/SourceMapperTests",
      "sources" : [
        "TestBasics.swift",
        "TestHelpers.swift",
        "TestJSON.swift",
        "TestMappings.swift",
        "TestVLQ.swift"
      ],
      "target_dependencies" : [
        "SourceMapper"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SourceMapper",
      "module_type" : "SwiftTarget",
      "name" : "SourceMapper",
      "path" : "Sources/SourceMapper",
      "product_memberships" : [
        "SourceMapper",
        "srcmapcat"
      ],
      "sources" : [
        "Errors.swift",
        "JSON.swift",
        "Mappings.swift",
        "SourceMap.swift",
        "UnpackedSourceMap.swift",
        "VLQ.swift"
      ],
      "type" : "library"
    },
    {
      "c99name" : "Cli",
      "module_type" : "SwiftTarget",
      "name" : "Cli",
      "path" : "Sources/Cli",
      "product_memberships" : [
        "srcmapcat"
      ],
      "sources" : [
        "main.swift"
      ],
      "target_dependencies" : [
        "SourceMapper"
      ],
      "type" : "executable"
    }
  ],
  "tools_version" : "6.0"
}
{
  "project" : {
    "configurations" : [
      "Debug",
      "Release"
    ],
    "name" : "SourceMapper",
    "schemes" : [
      "SourceMapper-Package"
    ],
    "targets" : [
      "SourceMapper",
      "SourceMapperTests",
      "Cli"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme SourceMapper-Package -destination generic/platform=watchOS OTHER_SWIFT_FLAGS=-stats-output-dir .stats
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 SourceMapper-Package -destination generic/platform=watchOS "OTHER_SWIFT_FLAGS=-stats-output-dir .stats"
Build settings from command line:
    OTHER_SWIFT_FLAGS = -stats-output-dir .stats
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (2 targets)
    Target 'Cli' in project 'SourceMapper'
        ➜ Explicit dependency on target 'SourceMapper' in project 'SourceMapper'
    Target 'SourceMapper' in project 'SourceMapper' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
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/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/ld -version_details
Build description signature: 64bd623fc01b34d224bf6d09bd1e6a49
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/64bd623fc01b34d224bf6d09bd1e6a49.xcbuilddata
/Users/admin/builder/spi-builder-workspace/SourceMapper.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 'SourceMapper' from project 'SourceMapper')
/Users/admin/builder/spi-builder-workspace/SourceMapper.xcodeproj: error: Signing for "Cli" requires a development team. Select a development team in the Signing & Capabilities editor. (in target 'Cli' from project 'SourceMapper')
** BUILD FAILED **
The following build commands failed:
	Building project SourceMapper with scheme SourceMapper-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" : "SourceMapper",
  "name" : "SourceMapper",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "SourceMapper",
      "targets" : [
        "SourceMapper"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "srcmapcat",
      "targets" : [
        "Cli"
      ],
      "type" : {
        "executable" : null
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SourceMapperTests",
      "module_type" : "SwiftTarget",
      "name" : "SourceMapperTests",
      "path" : "Tests/SourceMapperTests",
      "sources" : [
        "TestBasics.swift",
        "TestHelpers.swift",
        "TestJSON.swift",
        "TestMappings.swift",
        "TestVLQ.swift"
      ],
      "target_dependencies" : [
        "SourceMapper"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SourceMapper",
      "module_type" : "SwiftTarget",
      "name" : "SourceMapper",
      "path" : "Sources/SourceMapper",
      "product_memberships" : [
        "SourceMapper",
        "srcmapcat"
      ],
      "sources" : [
        "Errors.swift",
        "JSON.swift",
        "Mappings.swift",
        "SourceMap.swift",
        "UnpackedSourceMap.swift",
        "VLQ.swift"
      ],
      "type" : "library"
    },
    {
      "c99name" : "Cli",
      "module_type" : "SwiftTarget",
      "name" : "Cli",
      "path" : "Sources/Cli",
      "product_memberships" : [
        "srcmapcat"
      ],
      "sources" : [
        "main.swift"
      ],
      "target_dependencies" : [
        "SourceMapper"
      ],
      "type" : "executable"
    }
  ],
  "tools_version" : "6.0"
}
{
  "project" : {
    "configurations" : [
      "Debug",
      "Release"
    ],
    "name" : "SourceMapper",
    "schemes" : [
      "SourceMapper-Package"
    ],
    "targets" : [
      "SourceMapper",
      "SourceMapperTests",
      "Cli"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme SourceMapper-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 SourceMapper-Package -destination generic/platform=watchOS
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (2 targets)
    Target 'Cli' in project 'SourceMapper'
        ➜ Explicit dependency on target 'SourceMapper' in project 'SourceMapper'
    Target 'SourceMapper' in project 'SourceMapper' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
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/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/ld -version_details
Build description signature: d99349e82411993c9d737e24c794f599
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/d99349e82411993c9d737e24c794f599.xcbuilddata
/Users/admin/builder/spi-builder-workspace/SourceMapper.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 'SourceMapper' from project 'SourceMapper')
/Users/admin/builder/spi-builder-workspace/SourceMapper.xcodeproj: error: Signing for "Cli" requires a development team. Select a development team in the Signing & Capabilities editor. (in target 'Cli' from project 'SourceMapper')
** BUILD FAILED **
The following build commands failed:
	Building project SourceMapper with scheme SourceMapper-Package
(1 failure)
BUILD FAILURE 6.1 watchOS