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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 Apache, reference 0.5.0 (bd9a97), with Swift 6.1 for macOS (Xcode) using Xcode 16.3 on 24 Apr 2025 19:53:46 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme Apache -destination platform=macOS,arch=arm64

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/modswift/Apache.git
Reference: 0.5.0
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/modswift/Apache
 * tag               0.5.0      -> FETCH_HEAD
HEAD is now at bd9a976 Travis: Use Swift 4.2/5 tarballs
Cloned https://github.com/modswift/Apache.git
Revision (git rev-parse @):
bd9a97623070c0c068daabc30ffc144937815ff8
SUCCESS checkout https://github.com/modswift/Apache.git at 0.5.0
========================================
Build
========================================
Selected platform:         macosXcodebuild
Swift version:             6.1
Building package at path:  $PWD
https://github.com/modswift/Apache.git
https://github.com/modswift/Apache.git
{
  "dependencies" : [
    {
      "identity" : "capache",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "2.0.1",
            "upper_bound" : "3.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/modswift/CApache.git"
    }
  ],
  "manifest_display_name" : "Apache",
  "name" : "Apache",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Apache",
      "targets" : [
        "Apache"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "Apache",
      "module_type" : "SwiftTarget",
      "name" : "Apache",
      "path" : "Sources/Apache",
      "product_dependencies" : [
        "CApache"
      ],
      "product_memberships" : [
        "Apache"
      ],
      "sources" : [
        "APRTable.swift",
        "ApacheModuleConfig.swift",
        "ApacheRequest.swift",
        "DatabaseAPI.swift",
        "OptionalFNs.swift",
        "SemanticUI.swift",
        "module.swift",
        "request_rec.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.2"
}
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" : [
    {
      "identity" : "capache",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "2.0.1",
            "upper_bound" : "3.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/modswift/CApache.git"
    }
  ],
  "manifest_display_name" : "Apache",
  "name" : "Apache",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Apache",
      "targets" : [
        "Apache"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "Apache",
      "module_type" : "SwiftTarget",
      "name" : "Apache",
      "path" : "Sources/Apache",
      "product_dependencies" : [
        "CApache"
      ],
      "product_memberships" : [
        "Apache"
      ],
      "sources" : [
        "APRTable.swift",
        "ApacheModuleConfig.swift",
        "ApacheRequest.swift",
        "DatabaseAPI.swift",
        "OptionalFNs.swift",
        "SemanticUI.swift",
        "module.swift",
        "request_rec.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.2"
}
{
  "project" : {
    "configurations" : [
      "Debug",
      "Release"
    ],
    "name" : "Apache",
    "schemes" : [
      "Apache"
    ],
    "targets" : [
      "Apache"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme Apache -destination platform=macOS,arch=arm64 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 Apache -destination platform=macOS,arch=arm64 "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 'Apache' in project 'Apache' (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/MacOSX.platform/Developer/SDKs/MacOSX15.4.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: 539a839d6e6ebee20612b4b8a254f73e
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/539a839d6e6ebee20612b4b8a254f73e.xcbuilddata
/Users/admin/builder/spi-builder-workspace/xcconfig/ModSwiftLib.xcconfig:6:1: error: included file '/usr/local/lib/xcconfig/mod_swift.xcconfig' does not exist (in target 'Apache' from project 'Apache')
/Users/admin/builder/spi-builder-workspace/Apache.xcodeproj: warning: The macOS deployment target 'MACOSX_DEPLOYMENT_TARGET' is set to 10.11, but the range of supported deployment target versions is 10.13 to 15.4.99. (in target 'Apache' from project 'Apache')
note: Disabling previews because SWIFT_VERSION is set and SWIFT_OPTIMIZATION_LEVEL=-O, expected -Onone (in target 'Apache' from project 'Apache')
** BUILD FAILED **
The following build commands failed:
	Building project Apache with scheme Apache
(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" : [
    {
      "identity" : "capache",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "2.0.1",
            "upper_bound" : "3.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/modswift/CApache.git"
    }
  ],
  "manifest_display_name" : "Apache",
  "name" : "Apache",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Apache",
      "targets" : [
        "Apache"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "Apache",
      "module_type" : "SwiftTarget",
      "name" : "Apache",
      "path" : "Sources/Apache",
      "product_dependencies" : [
        "CApache"
      ],
      "product_memberships" : [
        "Apache"
      ],
      "sources" : [
        "APRTable.swift",
        "ApacheModuleConfig.swift",
        "ApacheRequest.swift",
        "DatabaseAPI.swift",
        "OptionalFNs.swift",
        "SemanticUI.swift",
        "module.swift",
        "request_rec.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.2"
}
{
  "project" : {
    "configurations" : [
      "Debug",
      "Release"
    ],
    "name" : "Apache",
    "schemes" : [
      "Apache"
    ],
    "targets" : [
      "Apache"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme Apache -destination platform=macOS,arch=arm64
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 Apache -destination platform=macOS,arch=arm64
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (1 target)
    Target 'Apache' in project 'Apache' (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/MacOSX.platform/Developer/SDKs/MacOSX15.4.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: f0a6459c819c2d1e0b7d5736fd8d60b7
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/f0a6459c819c2d1e0b7d5736fd8d60b7.xcbuilddata
/Users/admin/builder/spi-builder-workspace/xcconfig/ModSwiftLib.xcconfig:6:1: error: included file '/usr/local/lib/xcconfig/mod_swift.xcconfig' does not exist (in target 'Apache' from project 'Apache')
/Users/admin/builder/spi-builder-workspace/Apache.xcodeproj: warning: The macOS deployment target 'MACOSX_DEPLOYMENT_TARGET' is set to 10.11, but the range of supported deployment target versions is 10.13 to 15.4.99. (in target 'Apache' from project 'Apache')
note: Disabling previews because SWIFT_VERSION is set and SWIFT_OPTIMIZATION_LEVEL=-O, expected -Onone (in target 'Apache' from project 'Apache')
** BUILD FAILED **
The following build commands failed:
	Building project Apache with scheme Apache
(1 failure)
BUILD FAILURE 6.1 macosXcodebuild