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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 Prelude, reference 0.1.2 (5f0b12), with Swift 6.1 for visionOS using Xcode 16.3 on 26 Apr 2025 16:11:22 UTC.

Build Command

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

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/pointfreeco/swift-prelude.git
Reference: 0.1.2
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/pointfreeco/swift-prelude
 * tag               0.1.2      -> FETCH_HEAD
HEAD is now at 5f0b128 move add/mult precedence to 6 and 7 (#9)
Cloned https://github.com/pointfreeco/swift-prelude.git
Revision (git rev-parse @):
5f0b128bf620e162d574219d3d45b272f19c8423
SUCCESS checkout https://github.com/pointfreeco/swift-prelude.git at 0.1.2
========================================
Build
========================================
Selected platform:         visionOS
Swift version:             6.1
Building package at path:  $PWD
https://github.com/pointfreeco/swift-prelude.git
https://github.com/pointfreeco/swift-prelude.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Prelude",
  "name" : "Prelude",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Prelude",
      "targets" : [
        "Prelude"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "PreludeTests",
      "module_type" : "SwiftTarget",
      "name" : "PreludeTests",
      "path" : "Tests/PreludeTests",
      "sources" : [
        "ArrayTests.swift",
        "ChoiceTests.swift",
        "EitherTests.swift",
        "FunctionTests.swift",
        "KeyPathTests.swift",
        "MonoidTests.swift",
        "OptionalTests.swift",
        "SemigroupTests.swift",
        "SequenceTests.swift",
        "StringTests.swift",
        "StrongTests.swift",
        "TupleTests.swift",
        "UnitTests.swift"
      ],
      "target_dependencies" : [
        "Prelude"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Prelude",
      "module_type" : "SwiftTarget",
      "name" : "Prelude",
      "path" : "Sources/Prelude",
      "product_memberships" : [
        "Prelude"
      ],
      "sources" : [
        "Array.swift",
        "Choice.swift",
        "Either.swift",
        "Function.swift",
        "KeyPath.swift",
        "Monoid.swift",
        "Operators.swift",
        "Optional.swift",
        "PrecedenceGroups.swift",
        "Semigroup.swift",
        "Sequence.swift",
        "String.swift",
        "Strong.swift",
        "Tuple.swift",
        "Unit.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.0"
}
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" : "Prelude",
  "name" : "Prelude",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Prelude",
      "targets" : [
        "Prelude"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "PreludeTests",
      "module_type" : "SwiftTarget",
      "name" : "PreludeTests",
      "path" : "Tests/PreludeTests",
      "sources" : [
        "ArrayTests.swift",
        "ChoiceTests.swift",
        "EitherTests.swift",
        "FunctionTests.swift",
        "KeyPathTests.swift",
        "MonoidTests.swift",
        "OptionalTests.swift",
        "SemigroupTests.swift",
        "SequenceTests.swift",
        "StringTests.swift",
        "StrongTests.swift",
        "TupleTests.swift",
        "UnitTests.swift"
      ],
      "target_dependencies" : [
        "Prelude"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Prelude",
      "module_type" : "SwiftTarget",
      "name" : "Prelude",
      "path" : "Sources/Prelude",
      "product_memberships" : [
        "Prelude"
      ],
      "sources" : [
        "Array.swift",
        "Choice.swift",
        "Either.swift",
        "Function.swift",
        "KeyPath.swift",
        "Monoid.swift",
        "Operators.swift",
        "Optional.swift",
        "PrecedenceGroups.swift",
        "Semigroup.swift",
        "Sequence.swift",
        "String.swift",
        "Strong.swift",
        "Tuple.swift",
        "Unit.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.0"
}
{
  "project" : {
    "configurations" : [
      "Debug",
      "Release"
    ],
    "name" : "Prelude",
    "schemes" : [
      "Prelude-Package",
      "PreludePackageTests"
    ],
    "targets" : [
      "PreludeTests",
      "Prelude",
      "PreludePackageTests"
    ]
  }
}
{
  "workspace" : {
    "name" : "spi-builder-workspace",
    "schemes" : [
      "Prelude"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme Prelude -destination generic/platform=xrOS 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 Prelude -destination generic/platform=xrOS "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
Resolved source packages:
  Prelude: /Users/admin/builder/spi-builder-workspace
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (2 targets)
    Target 'Prelude' in project 'Prelude'
        ➜ Explicit dependency on target 'Prelude' in project 'Prelude'
    Target 'Prelude' in project 'Prelude' (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/XROS.platform/Developer/SDKs/XROS2.4.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: b49b58de114656ea7b8b0d12185bda5a
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/b49b58de114656ea7b8b0d12185bda5a.xcbuilddata
ClangStatCache /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang-stat-cache /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/SDKs/XROS2.4.sdk /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/xros2.4-22O233-407b76dbb837030756cbe1ab3f0b01b6.sdkstatcache
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang-stat-cache /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/SDKs/XROS2.4.sdk -o /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/xros2.4-22O233-407b76dbb837030756cbe1ab3f0b01b6.sdkstatcache
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/EagerLinkingTBDs/Debug-xros
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/EagerLinkingTBDs/Debug-xros
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-xros
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-xros
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-xros/PackageFrameworks
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-xros/PackageFrameworks
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Prelude.modulemap (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Prelude.modulemap
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Prelude.DependencyMetadataFileList (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Prelude.DependencyMetadataFileList
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Prelude.DependencyStaticMetadataFileList (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Prelude.DependencyStaticMetadataFileList
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude_const_extract_protocols.json (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude_const_extract_protocols.json
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude-OutputFileMap.json (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude-OutputFileMap.json
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude.SwiftFileList (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude.SwiftFileList
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude.LinkFileList (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude.LinkFileList
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude.SwiftConstValuesFileList (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude.SwiftConstValuesFileList
Copy /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/GeneratedModuleMaps-xros/Prelude.modulemap /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Prelude.modulemap (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace
    builtin-copy -exclude .DS_Store -exclude CVS -exclude .svn -exclude .git -exclude .hg -resolve-src-symlinks /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Prelude.modulemap /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/GeneratedModuleMaps-xros
SwiftDriver Prelude normal arm64 com.apple.xcode.tools.swift.compiler (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-SwiftDriver -- /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc -module-name Prelude -Onone -enforce-exclusivity\=checked @/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude.SwiftFileList -DSWIFT_PACKAGE -DDEBUG -stats-output-dir .stats -strict-concurrency\=complete -enable-upcoming-feature StrictConcurrency -enable-upcoming-feature DisableOutwardActorInference -enable-upcoming-feature GlobalActorIsolatedTypesUsability -enable-upcoming-feature InferSendableFromCaptures -plugin-path /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins/testing -enable-experimental-feature DebugDescriptionMacro -sdk /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/SDKs/XROS2.4.sdk -target arm64-apple-xros1.0 -g -module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex -Xfrontend -serialize-debugging-options -profile-coverage-mapping -profile-generate -enable-testing -index-store-path /Users/admin/builder/spi-builder-workspace/.derivedData/Index.noindex/DataStore -swift-version 4 -I /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-xros -I /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-xros -F /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/Library/Frameworks -F /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/SDKs/XROS2.4.sdk/Developer/Library/Frameworks -c -j10 -enable-batch-mode -incremental -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/xros2.4-22O233-407b76dbb837030756cbe1ab3f0b01b6.sdkstatcache -output-file-map /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude-OutputFileMap.json -use-frontend-parseable-output -save-temps -no-color-diagnostics -serialize-diagnostics -emit-dependencies -emit-module -emit-module-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude.swiftmodule -validate-clang-modules-once -clang-build-session-file /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/Session.modulevalidation -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/swift-overrides.hmap -emit-const-values -Xfrontend -const-gather-protocols-file -Xfrontend /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude_const_extract_protocols.json -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-xros/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -emit-objc-header -emit-objc-header-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude-Swift.h -working-directory /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode -experimental-emit-module-separately -disable-cmo
SwiftCompile normal arm64 Compiling\ Either.swift,\ Function.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Either.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Function.swift (in target 'Prelude' from project 'Prelude')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Either.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Function.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 Compiling\ PrecedenceGroups.swift,\ Semigroup.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/PrecedenceGroups.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Semigroup.swift (in target 'Prelude' from project 'Prelude')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/PrecedenceGroups.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Semigroup.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 Compiling\ Operators.swift,\ Optional.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Operators.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Optional.swift (in target 'Prelude' from project 'Prelude')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Operators.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Optional.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 Compiling\ KeyPath.swift,\ Monoid.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/KeyPath.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Monoid.swift (in target 'Prelude' from project 'Prelude')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/KeyPath.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Monoid.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 Compiling\ Array.swift,\ Choice.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Array.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Choice.swift (in target 'Prelude' from project 'Prelude')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Array.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Choice.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 Compiling\ Sequence.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Sequence.swift (in target 'Prelude' from project 'Prelude')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Sequence.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 Compiling\ Tuple.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Tuple.swift (in target 'Prelude' from project 'Prelude')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Tuple.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 Compiling\ Unit.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Unit.swift (in target 'Prelude' from project 'Prelude')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Unit.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftEmitModule normal arm64 Emitting\ module\ for\ Prelude (in target 'Prelude' from project 'Prelude')
Failed frontend command:
/Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-frontend -frontend -emit-module -experimental-skip-non-inlinable-function-bodies-without-types /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Array.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Choice.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Either.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Function.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/KeyPath.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Monoid.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Operators.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Optional.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/PrecedenceGroups.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Semigroup.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Sequence.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/String.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Strong.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Tuple.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Unit.swift -target arm64-apple-xros1.0 -Xllvm -aarch64-use-tbi -enable-objc-interop -stack-check -sdk /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/SDKs/XROS2.4.sdk -I /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-xros -I /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-xros -F /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/Library/Frameworks -F /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/SDKs/XROS2.4.sdk/Developer/Library/Frameworks -no-color-diagnostics -enable-testing -g -debug-info-format\=dwarf -dwarf-version\=4 -module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex -profile-generate -profile-coverage-mapping -swift-version 4 -enforce-exclusivity\=checked -stats-output-dir /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode/.stats -Onone -D SWIFT_PACKAGE -D DEBUG -serialize-debugging-options -const-gather-protocols-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude_const_extract_protocols.json -enable-upcoming-feature StrictConcurrency -enable-upcoming-feature DisableOutwardActorInference -enable-upcoming-feature GlobalActorIsolatedTypesUsability -enable-upcoming-feature InferSendableFromCaptures -enable-experimental-feature DebugDescriptionMacro -strict-concurrency\=complete -empty-abi-descriptor -plugin-path /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins/testing -validate-clang-modules-once -clang-build-session-file /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/Session.modulevalidation -Xcc -working-directory -Xcc /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode -resource-dir /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift -enable-anonymous-context-mangled-names -file-compilation-dir /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/xros2.4-22O233-407b76dbb837030756cbe1ab3f0b01b6.sdkstatcache -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/swift-overrides.hmap -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-xros/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -module-name Prelude -frontend-parseable-output -disable-clang-spi -target-sdk-version 2.4 -target-sdk-name xros2.4 -external-plugin-path /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/usr/lib/swift/host/plugins\#/Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/usr/bin/swift-plugin-server -external-plugin-path /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/usr/local/lib/swift/host/plugins\#/Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/usr/bin/swift-plugin-server -in-process-plugin-server-path /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/libSwiftInProcPluginServer.dylib -plugin-path /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins -plugin-path /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/local/lib/swift/host/plugins -emit-module-doc-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude.swiftdoc -emit-module-source-info-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude.swiftsourceinfo -emit-objc-header-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude-Swift.h -serialize-diagnostics-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude-master-emit-module.dia -emit-dependencies-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude-master-emit-module.d -o /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude.swiftmodule -emit-abi-descriptor-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude.abi.json
EmitSwiftModule normal arm64 (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Sequence.swift:33:83: error: 'SubSequence' is not a member type of type 'S'
public func drop<S: Sequence>(while p: @escaping (S.Element) -> Bool) -> (S) -> S.SubSequence {
                                                                                ~ ^
/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Sequence.swift:39:50: error: 'SubSequence' is not a member type of type 'S'
public func dropFirst<S: Sequence>(_ xs: S) -> S.SubSequence {
                                               ~ ^
/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Sequence.swift:43:58: error: 'SubSequence' is not a member type of type 'S'
public func dropFirst<S: Sequence>(_ n: Int) -> (S) -> S.SubSequence {
                                                       ~ ^
/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Sequence.swift:49:49: error: 'SubSequence' is not a member type of type 'S'
public func dropLast<S: Sequence>(_ xs: S) -> S.SubSequence {
                                              ~ ^
/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Sequence.swift:53:57: error: 'SubSequence' is not a member type of type 'S'
public func dropLast<S: Sequence>(_ n: Int) -> (S) -> S.SubSequence {
                                                      ~ ^
/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Sequence.swift:83:55: error: 'SubSequence' is not a member type of type 'S'
public func prefix<S: Sequence>(_ n: Int) -> (S) -> S.SubSequence {
                                                    ~ ^
/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Sequence.swift:89:85: error: 'SubSequence' is not a member type of type 'S'
public func prefix<S: Sequence>(while p: @escaping (S.Element) -> Bool) -> (S) -> S.SubSequence {
                                                                                  ~ ^
/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Sequence.swift:103:55: error: 'SubSequence' is not a member type of type 'S'
public func suffix<S: Sequence>(_ n: Int) -> (S) -> S.SubSequence {
                                                    ~ ^
/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Unit.swift:3:12: warning: let 'unit' is not concurrency-safe because non-'Sendable' type 'Unit' may have shared mutable state; this is an error in the Swift 6 language mode
public let unit = Unit()
           ^
/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Unit.swift:1:15: note: consider making struct 'Unit' conform to the 'Sendable' protocol
public struct Unit {}
              ^
                   : Sendable
/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Unit.swift:3:12: note: add '@MainActor' to make let 'unit' part of global actor 'MainActor'
public let unit = Unit()
           ^
@MainActor
/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Unit.swift:3:12: note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
public let unit = Unit()
           ^
nonisolated(unsafe)
SwiftCompile normal arm64 Compiling\ String.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/String.swift (in target 'Prelude' from project 'Prelude')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/String.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 Compiling\ Strong.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Strong.swift (in target 'Prelude' from project 'Prelude')
Command SwiftCompile failed with a nonzero exit code
** BUILD FAILED **
The following build commands failed:
	SwiftEmitModule normal arm64 Emitting\ module\ for\ Prelude (in target 'Prelude' from project 'Prelude')
	EmitSwiftModule normal arm64 (in target 'Prelude' from project 'Prelude')
	SwiftCompile normal arm64 Compiling\ Strong.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Strong.swift (in target 'Prelude' from project 'Prelude')
	Building workspace spi-builder-workspace with scheme Prelude
(4 failures)
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:
  Prelude: /Users/admin/builder/spi-builder-workspace
resolved source packages: Prelude
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Prelude",
  "name" : "Prelude",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Prelude",
      "targets" : [
        "Prelude"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "PreludeTests",
      "module_type" : "SwiftTarget",
      "name" : "PreludeTests",
      "path" : "Tests/PreludeTests",
      "sources" : [
        "ArrayTests.swift",
        "ChoiceTests.swift",
        "EitherTests.swift",
        "FunctionTests.swift",
        "KeyPathTests.swift",
        "MonoidTests.swift",
        "OptionalTests.swift",
        "SemigroupTests.swift",
        "SequenceTests.swift",
        "StringTests.swift",
        "StrongTests.swift",
        "TupleTests.swift",
        "UnitTests.swift"
      ],
      "target_dependencies" : [
        "Prelude"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Prelude",
      "module_type" : "SwiftTarget",
      "name" : "Prelude",
      "path" : "Sources/Prelude",
      "product_memberships" : [
        "Prelude"
      ],
      "sources" : [
        "Array.swift",
        "Choice.swift",
        "Either.swift",
        "Function.swift",
        "KeyPath.swift",
        "Monoid.swift",
        "Operators.swift",
        "Optional.swift",
        "PrecedenceGroups.swift",
        "Semigroup.swift",
        "Sequence.swift",
        "String.swift",
        "Strong.swift",
        "Tuple.swift",
        "Unit.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.0"
}
{
  "workspace" : {
    "name" : "spi-builder-workspace",
    "schemes" : [
      "Prelude"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme Prelude -destination generic/platform=xrOS
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 Prelude -destination generic/platform=xrOS
Resolve Package Graph
Resolved source packages:
  Prelude: /Users/admin/builder/spi-builder-workspace
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (2 targets)
    Target 'Prelude' in project 'Prelude'
        ➜ Explicit dependency on target 'Prelude' in project 'Prelude'
    Target 'Prelude' in project 'Prelude' (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/XROS.platform/Developer/SDKs/XROS2.4.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: 528585cd6b49f9c04e6fabfe5524b40c
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/528585cd6b49f9c04e6fabfe5524b40c.xcbuilddata
ClangStatCache /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang-stat-cache /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/SDKs/XROS2.4.sdk /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/xros2.4-22O233-407b76dbb837030756cbe1ab3f0b01b6.sdkstatcache
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang-stat-cache /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/SDKs/XROS2.4.sdk -o /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/xros2.4-22O233-407b76dbb837030756cbe1ab3f0b01b6.sdkstatcache
SwiftDriver Prelude normal arm64 com.apple.xcode.tools.swift.compiler (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-SwiftDriver -- /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc -module-name Prelude -Onone -enforce-exclusivity\=checked @/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude.SwiftFileList -DSWIFT_PACKAGE -DDEBUG -DXcode -plugin-path /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins/testing -enable-experimental-feature DebugDescriptionMacro -sdk /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/SDKs/XROS2.4.sdk -target arm64-apple-xros1.0 -g -module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex -Xfrontend -serialize-debugging-options -profile-coverage-mapping -profile-generate -enable-testing -index-store-path /Users/admin/builder/spi-builder-workspace/.derivedData/Index.noindex/DataStore -swift-version 4 -I /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-xros -I /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-xros -F /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/Library/Frameworks -F /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/SDKs/XROS2.4.sdk/Developer/Library/Frameworks -c -j10 -enable-batch-mode -incremental -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/xros2.4-22O233-407b76dbb837030756cbe1ab3f0b01b6.sdkstatcache -output-file-map /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude-OutputFileMap.json -use-frontend-parseable-output -save-temps -no-color-diagnostics -serialize-diagnostics -emit-dependencies -emit-module -emit-module-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude.swiftmodule -validate-clang-modules-once -clang-build-session-file /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/Session.modulevalidation -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/swift-overrides.hmap -emit-const-values -Xfrontend -const-gather-protocols-file -Xfrontend /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude_const_extract_protocols.json -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-xros/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -emit-objc-header -emit-objc-header-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude-Swift.h -working-directory /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode -experimental-emit-module-separately -disable-cmo
SwiftCompile normal arm64 Compiling\ Array.swift,\ Choice.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Array.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Choice.swift (in target 'Prelude' from project 'Prelude')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Array.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Choice.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 Compiling\ Either.swift,\ Function.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Either.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Function.swift (in target 'Prelude' from project 'Prelude')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Either.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Function.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftEmitModule normal arm64 Emitting\ module\ for\ Prelude (in target 'Prelude' from project 'Prelude')
Failed frontend command:
/Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-frontend -frontend -emit-module -experimental-skip-non-inlinable-function-bodies-without-types /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Array.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Choice.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Either.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Function.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/KeyPath.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Monoid.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Operators.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Optional.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/PrecedenceGroups.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Semigroup.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Sequence.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/String.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Strong.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Tuple.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Unit.swift -target arm64-apple-xros1.0 -Xllvm -aarch64-use-tbi -enable-objc-interop -stack-check -sdk /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/SDKs/XROS2.4.sdk -I /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-xros -I /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-xros -F /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/Library/Frameworks -F /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/SDKs/XROS2.4.sdk/Developer/Library/Frameworks -no-color-diagnostics -enable-testing -g -debug-info-format\=dwarf -dwarf-version\=4 -module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex -profile-generate -profile-coverage-mapping -swift-version 4 -enforce-exclusivity\=checked -Onone -D SWIFT_PACKAGE -D DEBUG -D Xcode -serialize-debugging-options -const-gather-protocols-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude_const_extract_protocols.json -enable-experimental-feature DebugDescriptionMacro -empty-abi-descriptor -plugin-path /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins/testing -validate-clang-modules-once -clang-build-session-file /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/Session.modulevalidation -Xcc -working-directory -Xcc /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode -resource-dir /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift -enable-anonymous-context-mangled-names -file-compilation-dir /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/xros2.4-22O233-407b76dbb837030756cbe1ab3f0b01b6.sdkstatcache -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/swift-overrides.hmap -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-xros/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -module-name Prelude -frontend-parseable-output -disable-clang-spi -target-sdk-version 2.4 -target-sdk-name xros2.4 -external-plugin-path /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/usr/lib/swift/host/plugins\#/Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/usr/bin/swift-plugin-server -external-plugin-path /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/usr/local/lib/swift/host/plugins\#/Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/XROS.platform/Developer/usr/bin/swift-plugin-server -in-process-plugin-server-path /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/libSwiftInProcPluginServer.dylib -plugin-path /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins -plugin-path /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/local/lib/swift/host/plugins -emit-module-doc-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude.swiftdoc -emit-module-source-info-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude.swiftsourceinfo -emit-objc-header-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude-Swift.h -serialize-diagnostics-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude-master-emit-module.dia -emit-dependencies-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude-master-emit-module.d -o /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude.swiftmodule -emit-abi-descriptor-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/Prelude.build/Debug-xros/Prelude.build/Objects-normal/arm64/Prelude.abi.json
EmitSwiftModule normal arm64 (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Sequence.swift:33:83: error: 'SubSequence' is not a member type of type 'S'
public func drop<S: Sequence>(while p: @escaping (S.Element) -> Bool) -> (S) -> S.SubSequence {
                                                                                ~ ^
/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Sequence.swift:39:50: error: 'SubSequence' is not a member type of type 'S'
public func dropFirst<S: Sequence>(_ xs: S) -> S.SubSequence {
                                               ~ ^
/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Sequence.swift:43:58: error: 'SubSequence' is not a member type of type 'S'
public func dropFirst<S: Sequence>(_ n: Int) -> (S) -> S.SubSequence {
                                                       ~ ^
/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Sequence.swift:49:49: error: 'SubSequence' is not a member type of type 'S'
public func dropLast<S: Sequence>(_ xs: S) -> S.SubSequence {
                                              ~ ^
/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Sequence.swift:53:57: error: 'SubSequence' is not a member type of type 'S'
public func dropLast<S: Sequence>(_ n: Int) -> (S) -> S.SubSequence {
                                                      ~ ^
/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Sequence.swift:83:55: error: 'SubSequence' is not a member type of type 'S'
public func prefix<S: Sequence>(_ n: Int) -> (S) -> S.SubSequence {
                                                    ~ ^
/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Sequence.swift:89:85: error: 'SubSequence' is not a member type of type 'S'
public func prefix<S: Sequence>(while p: @escaping (S.Element) -> Bool) -> (S) -> S.SubSequence {
                                                                                  ~ ^
/Users/admin/builder/spi-builder-workspace/Sources/Prelude/Sequence.swift:103:55: error: 'SubSequence' is not a member type of type 'S'
public func suffix<S: Sequence>(_ n: Int) -> (S) -> S.SubSequence {
                                                    ~ ^
SwiftCompile normal arm64 Compiling\ PrecedenceGroups.swift,\ Semigroup.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/PrecedenceGroups.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Semigroup.swift (in target 'Prelude' from project 'Prelude')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/PrecedenceGroups.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Semigroup.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 Compiling\ Sequence.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Sequence.swift (in target 'Prelude' from project 'Prelude')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Sequence.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 Compiling\ String.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/String.swift (in target 'Prelude' from project 'Prelude')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/String.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 Compiling\ Unit.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Unit.swift (in target 'Prelude' from project 'Prelude')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Unit.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 Compiling\ KeyPath.swift,\ Monoid.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/KeyPath.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Monoid.swift (in target 'Prelude' from project 'Prelude')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/KeyPath.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Monoid.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 Compiling\ Strong.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Strong.swift (in target 'Prelude' from project 'Prelude')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Strong.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 Compiling\ Tuple.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Tuple.swift (in target 'Prelude' from project 'Prelude')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Tuple.swift (in target 'Prelude' from project 'Prelude')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

SwiftCompile normal arm64 Compiling\ Operators.swift,\ Optional.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Operators.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Optional.swift (in target 'Prelude' from project 'Prelude')
Command SwiftCompile failed with a nonzero exit code
** BUILD FAILED **
The following build commands failed:
	SwiftEmitModule normal arm64 Emitting\ module\ for\ Prelude (in target 'Prelude' from project 'Prelude')
	EmitSwiftModule normal arm64 (in target 'Prelude' from project 'Prelude')
	SwiftCompile normal arm64 Compiling\ Operators.swift,\ Optional.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Operators.swift /Users/admin/builder/spi-builder-workspace/Sources/Prelude/Optional.swift (in target 'Prelude' from project 'Prelude')
	Building workspace spi-builder-workspace with scheme Prelude
(4 failures)
BUILD FAILURE 6.1 visionOS