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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 RubyGateway with Swift 6.1 for watchOS using Xcode 16.3.

Build Command

Build command unavailable

Build Log

========================================
RunAll
========================================
Builder version: 4.61.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/johnfairh/RubyGateway.git
Reference: v6.1.1
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/johnfairh/RubyGateway
 * tag               v6.1.1     -> FETCH_HEAD
HEAD is now at 7955a45 Version 6.1.1
Submodule path 'CRuby': checked out '6cdfc7db30f8fc7a27199a1b6b829e42e67bb5c7'
Submodule 'CRuby' (https://github.com/johnfairh/CRuby.git) registered for path 'CRuby'
Cloning into '/Users/admin/builder/spi-builder-workspace/CRuby'...
Cloned https://github.com/johnfairh/RubyGateway.git
Revision (git rev-parse @):
7955a459712adb58aad622843c781946097b2e91
SUCCESS checkout https://github.com/johnfairh/RubyGateway.git at v6.1.1
========================================
Build
========================================
Selected platform:         watchOS
Swift version:             6.1
Building package at path:  $PWD
https://github.com/johnfairh/RubyGateway.git
https://github.com/johnfairh/RubyGateway.git
{
  "dependencies" : [
    {
      "identity" : "cruby",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "2.1.0",
            "upper_bound" : "3.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/johnfairh/CRuby"
    }
  ],
  "manifest_display_name" : "RubyGateway",
  "name" : "RubyGateway",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "RubyGateway",
      "targets" : [
        "RubyGateway",
        "RubyGatewayHelpers"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "RubyThreadSample",
      "targets" : [
        "RubyThreadSample"
      ],
      "type" : {
        "executable" : null
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "RubyThreadSample",
      "module_type" : "SwiftTarget",
      "name" : "RubyThreadSample",
      "path" : "Sources/RubyThreadSample",
      "product_memberships" : [
        "RubyThreadSample"
      ],
      "sources" : [
        "RubyExecutor.swift",
        "main.swift"
      ],
      "target_dependencies" : [
        "RubyGateway"
      ],
      "type" : "executable"
    },
    {
      "c99name" : "RubyGatewayTests",
      "module_type" : "SwiftTarget",
      "name" : "RubyGatewayTests",
      "path" : "Tests/RubyGatewayTests",
      "sources" : [
        "Helpers.swift",
        "TestArrays.swift",
        "TestCallable.swift",
        "TestClassDef.swift",
        "TestCollection.swift",
        "TestComplex.swift",
        "TestConstants.swift",
        "TestDemo.swift",
        "TestDictionaries.swift",
        "TestDynamic.swift",
        "TestErrors.swift",
        "TestFailable.swift",
        "TestGlobalVars.swift",
        "TestMethods.swift",
        "TestMiscObjTypes.swift",
        "TestNumerics.swift",
        "TestObjMethods.swift",
        "TestOperators.swift",
        "TestProcs.swift",
        "TestRanges.swift",
        "TestRational.swift",
        "TestRbObject.swift",
        "TestSets.swift",
        "TestStrings.swift",
        "TestThreads.swift",
        "TestVM.swift",
        "TestVars.swift"
      ],
      "target_dependencies" : [
        "RubyGateway"
      ],
      "type" : "test"
    },
    {
      "c99name" : "RubyGatewayHelpers",
      "module_type" : "ClangTarget",
      "name" : "RubyGatewayHelpers",
      "path" : "Sources/RubyGatewayHelpers",
      "product_dependencies" : [
        "CRuby"
      ],
      "product_memberships" : [
        "RubyGateway",
        "RubyThreadSample"
      ],
      "sources" : [
        "rbg_macros.m",
        "rbg_protect.m",
        "rbg_value.m"
      ],
      "type" : "library"
    },
    {
      "c99name" : "RubyGateway",
      "module_type" : "SwiftTarget",
      "name" : "RubyGateway",
      "path" : "Sources/RubyGateway",
      "product_dependencies" : [
        "CRuby"
      ],
      "product_memberships" : [
        "RubyGateway",
        "RubyThreadSample"
      ],
      "sources" : [
        "CRubyMacros.swift",
        "Lock.swift",
        "RbBlockCall.swift",
        "RbClass.swift",
        "RbComplex.swift",
        "RbConversions.swift",
        "RbError.swift",
        "RbFailableAccess.swift",
        "RbGateway.swift",
        "RbGlobalVar.swift",
        "RbMethod.swift",
        "RbNumericConversions.swift",
        "RbObject.swift",
        "RbObjectAccess.swift",
        "RbObjectCollection.swift",
        "RbOperators.swift",
        "RbProc.swift",
        "RbRational.swift",
        "RbSymbol.swift",
        "RbThread.swift",
        "RbVM.swift",
        "String+RubyGateway.swift"
      ],
      "target_dependencies" : [
        "RubyGatewayHelpers"
      ],
      "type" : "library"
    }
  ],
  "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" : [
    {
      "identity" : "cruby",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "2.1.0",
            "upper_bound" : "3.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/johnfairh/CRuby"
    }
  ],
  "manifest_display_name" : "RubyGateway",
  "name" : "RubyGateway",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "RubyGateway",
      "targets" : [
        "RubyGateway",
        "RubyGatewayHelpers"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "RubyThreadSample",
      "targets" : [
        "RubyThreadSample"
      ],
      "type" : {
        "executable" : null
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "RubyThreadSample",
      "module_type" : "SwiftTarget",
      "name" : "RubyThreadSample",
      "path" : "Sources/RubyThreadSample",
      "product_memberships" : [
        "RubyThreadSample"
      ],
      "sources" : [
        "RubyExecutor.swift",
        "main.swift"
      ],
      "target_dependencies" : [
        "RubyGateway"
      ],
      "type" : "executable"
    },
    {
      "c99name" : "RubyGatewayTests",
      "module_type" : "SwiftTarget",
      "name" : "RubyGatewayTests",
      "path" : "Tests/RubyGatewayTests",
      "sources" : [
        "Helpers.swift",
        "TestArrays.swift",
        "TestCallable.swift",
        "TestClassDef.swift",
        "TestCollection.swift",
        "TestComplex.swift",
        "TestConstants.swift",
        "TestDemo.swift",
        "TestDictionaries.swift",
        "TestDynamic.swift",
        "TestErrors.swift",
        "TestFailable.swift",
        "TestGlobalVars.swift",
        "TestMethods.swift",
        "TestMiscObjTypes.swift",
        "TestNumerics.swift",
        "TestObjMethods.swift",
        "TestOperators.swift",
        "TestProcs.swift",
        "TestRanges.swift",
        "TestRational.swift",
        "TestRbObject.swift",
        "TestSets.swift",
        "TestStrings.swift",
        "TestThreads.swift",
        "TestVM.swift",
        "TestVars.swift"
      ],
      "target_dependencies" : [
        "RubyGateway"
      ],
      "type" : "test"
    },
    {
      "c99name" : "RubyGatewayHelpers",
      "module_type" : "ClangTarget",
      "name" : "RubyGatewayHelpers",
      "path" : "Sources/RubyGatewayHelpers",
      "product_dependencies" : [
        "CRuby"
      ],
      "product_memberships" : [
        "RubyGateway",
        "RubyThreadSample"
      ],
      "sources" : [
        "rbg_macros.m",
        "rbg_protect.m",
        "rbg_value.m"
      ],
      "type" : "library"
    },
    {
      "c99name" : "RubyGateway",
      "module_type" : "SwiftTarget",
      "name" : "RubyGateway",
      "path" : "Sources/RubyGateway",
      "product_dependencies" : [
        "CRuby"
      ],
      "product_memberships" : [
        "RubyGateway",
        "RubyThreadSample"
      ],
      "sources" : [
        "CRubyMacros.swift",
        "Lock.swift",
        "RbBlockCall.swift",
        "RbClass.swift",
        "RbComplex.swift",
        "RbConversions.swift",
        "RbError.swift",
        "RbFailableAccess.swift",
        "RbGateway.swift",
        "RbGlobalVar.swift",
        "RbMethod.swift",
        "RbNumericConversions.swift",
        "RbObject.swift",
        "RbObjectAccess.swift",
        "RbObjectCollection.swift",
        "RbOperators.swift",
        "RbProc.swift",
        "RbRational.swift",
        "RbSymbol.swift",
        "RbThread.swift",
        "RbVM.swift",
        "String+RubyGateway.swift"
      ],
      "target_dependencies" : [
        "RubyGatewayHelpers"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "6.0"
}
{
  "project" : {
    "configurations" : [
      "Debug",
      "Release"
    ],
    "name" : "RubyGateway",
    "schemes" : [
      "RubyGateway-Package"
    ],
    "targets" : [
      "RubyGatewayTests",
      "RubyGateway",
      "RubyGatewayHelpers"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme RubyGateway-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 RubyGateway-Package -destination generic/platform=watchOS "OTHER_SWIFT_FLAGS=-stats-output-dir .stats"
Build settings from command line:
    OTHER_SWIFT_FLAGS = -stats-output-dir .stats
2025-04-29 10:38:54.670 xcodebuild[581:3247] Writing error result bundle to /var/folders/5k/5yc19ymj0jqd5v0zvgfqz0xw0000gn/T/ResultBundle_2025-29-04_10-38-0054.xcresult
xcodebuild: error: Unable to find a destination matching the provided destination specifier:
		{ generic:1, platform:watchOS }
	Available destinations for the "RubyGateway-Package" scheme:
		{ platform:macOS, arch:arm64, id:25db2f9f3c00b5bd8fa9631a3d741414cdc06b4c, name:My Mac }
		{ platform:macOS, arch:x86_64, id:25db2f9f3c00b5bd8fa9631a3d741414cdc06b4c, name:My Mac }
		{ platform:macOS, name:Any Mac }
INFRASTRUCTURE ERROR (status: destinationUnavailable