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Build Information

Failed to build URLSessionBackport, reference main (133026), with Swift 6.1 for tvOS using Xcode 16.3 on 26 Apr 2025 17:15:50 UTC.

Build Command

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

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/mochidev/URLSessionBackport.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/mochidev/URLSessionBackport
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 133026d Removed the last preconditionFailure
Cloned https://github.com/mochidev/URLSessionBackport.git
Revision (git rev-parse @):
133026d8723a81d7ddd293ce3d9fcadf72317517
SUCCESS checkout https://github.com/mochidev/URLSessionBackport.git at main
========================================
Build
========================================
Selected platform:         tvOS
Swift version:             6.1
Building package at path:  $PWD
https://github.com/mochidev/URLSessionBackport.git
https://github.com/mochidev/URLSessionBackport.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "URLSessionBackport",
  "name" : "URLSessionBackport",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.15"
    },
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "watchos",
      "version" : "6.0"
    }
  ],
  "products" : [
    {
      "name" : "URLSessionBackport",
      "targets" : [
        "URLSessionBackport"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "URLSessionBackportTests",
      "module_type" : "SwiftTarget",
      "name" : "URLSessionBackportTests",
      "path" : "Tests/URLSessionBackportTests",
      "sources" : [
        "URLSessionBackportTests.swift"
      ],
      "target_dependencies" : [
        "URLSessionBackport"
      ],
      "type" : "test"
    },
    {
      "c99name" : "URLSessionBackport",
      "module_type" : "SwiftTarget",
      "name" : "URLSessionBackport",
      "path" : "Sources/URLSessionBackport",
      "product_memberships" : [
        "URLSessionBackport"
      ],
      "sources" : [
        "AsyncBytes.swift",
        "DataAccumulator.swift",
        "SessionDelegateProxy.swift",
        "TaskDelegateHandler.swift",
        "URLSessionBackport.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.5"
}
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:
  URLSessionBackport: /Users/admin/builder/spi-builder-workspace
resolved source packages: URLSessionBackport
{
  "dependencies" : [
  ],
  "manifest_display_name" : "URLSessionBackport",
  "name" : "URLSessionBackport",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.15"
    },
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "watchos",
      "version" : "6.0"
    }
  ],
  "products" : [
    {
      "name" : "URLSessionBackport",
      "targets" : [
        "URLSessionBackport"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "URLSessionBackportTests",
      "module_type" : "SwiftTarget",
      "name" : "URLSessionBackportTests",
      "path" : "Tests/URLSessionBackportTests",
      "sources" : [
        "URLSessionBackportTests.swift"
      ],
      "target_dependencies" : [
        "URLSessionBackport"
      ],
      "type" : "test"
    },
    {
      "c99name" : "URLSessionBackport",
      "module_type" : "SwiftTarget",
      "name" : "URLSessionBackport",
      "path" : "Sources/URLSessionBackport",
      "product_memberships" : [
        "URLSessionBackport"
      ],
      "sources" : [
        "AsyncBytes.swift",
        "DataAccumulator.swift",
        "SessionDelegateProxy.swift",
        "TaskDelegateHandler.swift",
        "URLSessionBackport.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.5"
}
{
  "workspace" : {
    "name" : "spi-builder-workspace",
    "schemes" : [
      "URLSessionBackport"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme URLSessionBackport -destination generic/platform=tvOS 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 URLSessionBackport -destination generic/platform=tvOS "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:
  URLSessionBackport: /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 'URLSessionBackport' in project 'URLSessionBackport'
        ➜ Explicit dependency on target 'URLSessionBackport' in project 'URLSessionBackport'
    Target 'URLSessionBackport' in project 'URLSessionBackport' (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/AppleTVOS.platform/Developer/SDKs/AppleTVOS18.4.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: d185a00a1331b622ef4c2b1c078772c6
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/d185a00a1331b622ef4c2b1c078772c6.xcbuilddata
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
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/AppleTVOS.platform/Developer/SDKs/AppleTVOS18.4.sdk /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/appletvos18.4-22L251-271d326055c85f9856fa135c41255102.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/AppleTVOS.platform/Developer/SDKs/AppleTVOS18.4.sdk -o /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/appletvos18.4-22L251-271d326055c85f9856fa135c41255102.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/Debug-appletvos
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-appletvos
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/EagerLinkingTBDs/Debug-appletvos
    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-appletvos
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-appletvos/PackageFrameworks
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-appletvos/PackageFrameworks
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/URLSessionBackport.DependencyStaticMetadataFileList (in target 'URLSessionBackport' from project 'URLSessionBackport')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/URLSessionBackport.DependencyStaticMetadataFileList
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/URLSessionBackport.DependencyMetadataFileList (in target 'URLSessionBackport' from project 'URLSessionBackport')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/URLSessionBackport.DependencyMetadataFileList
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/URLSessionBackport.modulemap (in target 'URLSessionBackport' from project 'URLSessionBackport')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/URLSessionBackport.modulemap
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport.SwiftConstValuesFileList (in target 'URLSessionBackport' from project 'URLSessionBackport')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport.SwiftConstValuesFileList
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport_const_extract_protocols.json (in target 'URLSessionBackport' from project 'URLSessionBackport')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport_const_extract_protocols.json
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport.LinkFileList (in target 'URLSessionBackport' from project 'URLSessionBackport')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport.LinkFileList
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport.SwiftFileList (in target 'URLSessionBackport' from project 'URLSessionBackport')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport.SwiftFileList
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport-OutputFileMap.json (in target 'URLSessionBackport' from project 'URLSessionBackport')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport-OutputFileMap.json
Copy /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/GeneratedModuleMaps-appletvos/URLSessionBackport.modulemap /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/URLSessionBackport.modulemap (in target 'URLSessionBackport' from project 'URLSessionBackport')
    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/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/URLSessionBackport.modulemap /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/GeneratedModuleMaps-appletvos
SwiftDriver URLSessionBackport normal arm64 com.apple.xcode.tools.swift.compiler (in target 'URLSessionBackport' from project 'URLSessionBackport')
    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 URLSessionBackport -Onone -enforce-exclusivity\=checked @/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport.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/AppleTVOS.platform/Developer/SDKs/AppleTVOS18.4.sdk -target arm64-apple-tvos13.0 -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 5 -I /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-appletvos -I /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-appletvos -F /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/Library/Frameworks -F /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS18.4.sdk/Developer/Library/Frameworks -c -j10 -enable-batch-mode -incremental -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/appletvos18.4-22L251-271d326055c85f9856fa135c41255102.sdkstatcache -output-file-map /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport-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/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport.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/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/swift-overrides.hmap -emit-const-values -Xfrontend -const-gather-protocols-file -Xfrontend /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport_const_extract_protocols.json -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-appletvos/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.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/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport-Swift.h -working-directory /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode -experimental-emit-module-separately -disable-cmo
SwiftCompile normal arm64 Compiling\ SessionDelegateProxy.swift /Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/SessionDelegateProxy.swift (in target 'URLSessionBackport' from project 'URLSessionBackport')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/SessionDelegateProxy.swift (in target 'URLSessionBackport' from project 'URLSessionBackport')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

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

SwiftEmitModule normal arm64 Emitting\ module\ for\ URLSessionBackport (in target 'URLSessionBackport' from project 'URLSessionBackport')
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/URLSessionBackport/AsyncBytes.swift /Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/DataAccumulator.swift /Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/SessionDelegateProxy.swift /Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/TaskDelegateHandler.swift /Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/URLSessionBackport.swift -target arm64-apple-tvos13.0 -Xllvm -aarch64-use-tbi -enable-objc-interop -stack-check -sdk /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS18.4.sdk -I /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-appletvos -I /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-appletvos -F /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/Library/Frameworks -F /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS18.4.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 5 -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/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport_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/appletvos18.4-22L251-271d326055c85f9856fa135c41255102.sdkstatcache -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/swift-overrides.hmap -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-appletvos/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -module-name URLSessionBackport -frontend-parseable-output -disable-clang-spi -target-sdk-version 18.4 -target-sdk-name appletvos18.4 -external-plugin-path /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/usr/lib/swift/host/plugins\#/Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/usr/bin/swift-plugin-server -external-plugin-path /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/usr/local/lib/swift/host/plugins\#/Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/AppleTVOS.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/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport.swiftdoc -emit-module-source-info-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport.swiftsourceinfo -emit-objc-header-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport-Swift.h -serialize-diagnostics-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport-master-emit-module.dia -emit-dependencies-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport-master-emit-module.d -o /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport.swiftmodule -emit-abi-descriptor-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport.abi.json
EmitSwiftModule normal arm64 (in target 'URLSessionBackport' from project 'URLSessionBackport')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

/Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/AsyncBytes.swift:19:22: error: 'AsyncBytes' is only available in tvOS 15.0 or newer
extension URLSession.AsyncBytes.Iterator: BytesProvider {}
                     ^
/Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/AsyncBytes.swift:19:1: note: add @available attribute to enclosing extension
extension URLSession.AsyncBytes.Iterator: BytesProvider {}
^
/Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/AsyncBytes.swift:47:39: error: 'AsyncBytes' is only available in tvOS 15.0 or newer
        init(_ asyncBytes: URLSession.AsyncBytes) {
                                      ^
/Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/AsyncBytes.swift:47:9: note: add @available attribute to enclosing initializer
        init(_ asyncBytes: URLSession.AsyncBytes) {
        ^
/Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/AsyncBytes.swift:24:19: note: add @available attribute to enclosing struct
    public struct AsyncBytes : AsyncSequence {
                  ^
/Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/SessionDelegateProxy.swift:15:7: warning: non-final class 'SessionDelegateProxy' cannot conform to 'Sendable'; use '@unchecked Sendable'; this is an error in the Swift 6 language mode
class SessionDelegateProxy: NSObject {
      ^
/Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/SessionDelegateProxy.swift:16:9: warning: stored property 'originalDelegate' of 'Sendable'-conforming class 'SessionDelegateProxy' is mutable; this is an error in the Swift 6 language mode
    var originalDelegate: URLSessionDelegate?
        ^
SwiftCompile normal arm64 Compiling\ AsyncBytes.swift /Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/AsyncBytes.swift (in target 'URLSessionBackport' from project 'URLSessionBackport')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/AsyncBytes.swift (in target 'URLSessionBackport' from project 'URLSessionBackport')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

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

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

** BUILD FAILED **
The following build commands failed:
	SwiftEmitModule normal arm64 Emitting\ module\ for\ URLSessionBackport (in target 'URLSessionBackport' from project 'URLSessionBackport')
	EmitSwiftModule normal arm64 (in target 'URLSessionBackport' from project 'URLSessionBackport')
	Building workspace spi-builder-workspace with scheme URLSessionBackport
(3 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:
  URLSessionBackport: /Users/admin/builder/spi-builder-workspace
resolved source packages: URLSessionBackport
{
  "dependencies" : [
  ],
  "manifest_display_name" : "URLSessionBackport",
  "name" : "URLSessionBackport",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.15"
    },
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "watchos",
      "version" : "6.0"
    }
  ],
  "products" : [
    {
      "name" : "URLSessionBackport",
      "targets" : [
        "URLSessionBackport"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "URLSessionBackportTests",
      "module_type" : "SwiftTarget",
      "name" : "URLSessionBackportTests",
      "path" : "Tests/URLSessionBackportTests",
      "sources" : [
        "URLSessionBackportTests.swift"
      ],
      "target_dependencies" : [
        "URLSessionBackport"
      ],
      "type" : "test"
    },
    {
      "c99name" : "URLSessionBackport",
      "module_type" : "SwiftTarget",
      "name" : "URLSessionBackport",
      "path" : "Sources/URLSessionBackport",
      "product_memberships" : [
        "URLSessionBackport"
      ],
      "sources" : [
        "AsyncBytes.swift",
        "DataAccumulator.swift",
        "SessionDelegateProxy.swift",
        "TaskDelegateHandler.swift",
        "URLSessionBackport.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.5"
}
{
  "workspace" : {
    "name" : "spi-builder-workspace",
    "schemes" : [
      "URLSessionBackport"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme URLSessionBackport -destination generic/platform=tvOS
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 URLSessionBackport -destination generic/platform=tvOS
Resolve Package Graph
Resolved source packages:
  URLSessionBackport: /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 'URLSessionBackport' in project 'URLSessionBackport'
        ➜ Explicit dependency on target 'URLSessionBackport' in project 'URLSessionBackport'
    Target 'URLSessionBackport' in project 'URLSessionBackport' (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/AppleTVOS.platform/Developer/SDKs/AppleTVOS18.4.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: d1c3ba0cf65bf887e14639ae72c44c8e
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/d1c3ba0cf65bf887e14639ae72c44c8e.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/AppleTVOS.platform/Developer/SDKs/AppleTVOS18.4.sdk /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/appletvos18.4-22L251-271d326055c85f9856fa135c41255102.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/AppleTVOS.platform/Developer/SDKs/AppleTVOS18.4.sdk -o /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/appletvos18.4-22L251-271d326055c85f9856fa135c41255102.sdkstatcache
SwiftDriver URLSessionBackport normal arm64 com.apple.xcode.tools.swift.compiler (in target 'URLSessionBackport' from project 'URLSessionBackport')
    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 URLSessionBackport -Onone -enforce-exclusivity\=checked @/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport.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/AppleTVOS.platform/Developer/SDKs/AppleTVOS18.4.sdk -target arm64-apple-tvos13.0 -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 5 -I /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-appletvos -I /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-appletvos -F /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/Library/Frameworks -F /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS18.4.sdk/Developer/Library/Frameworks -c -j10 -enable-batch-mode -incremental -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/appletvos18.4-22L251-271d326055c85f9856fa135c41255102.sdkstatcache -output-file-map /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport-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/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport.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/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/swift-overrides.hmap -emit-const-values -Xfrontend -const-gather-protocols-file -Xfrontend /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport_const_extract_protocols.json -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-appletvos/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.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/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport-Swift.h -working-directory /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode -experimental-emit-module-separately -disable-cmo
SwiftCompile normal arm64 Compiling\ DataAccumulator.swift /Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/DataAccumulator.swift (in target 'URLSessionBackport' from project 'URLSessionBackport')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/DataAccumulator.swift (in target 'URLSessionBackport' from project 'URLSessionBackport')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

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

SwiftEmitModule normal arm64 Emitting\ module\ for\ URLSessionBackport (in target 'URLSessionBackport' from project 'URLSessionBackport')
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/URLSessionBackport/AsyncBytes.swift /Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/DataAccumulator.swift /Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/SessionDelegateProxy.swift /Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/TaskDelegateHandler.swift /Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/URLSessionBackport.swift -target arm64-apple-tvos13.0 -Xllvm -aarch64-use-tbi -enable-objc-interop -stack-check -sdk /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS18.4.sdk -I /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-appletvos -I /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-appletvos -F /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/Library/Frameworks -F /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS18.4.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 5 -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/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport_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/appletvos18.4-22L251-271d326055c85f9856fa135c41255102.sdkstatcache -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/swift-overrides.hmap -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-appletvos/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -module-name URLSessionBackport -frontend-parseable-output -disable-clang-spi -target-sdk-version 18.4 -target-sdk-name appletvos18.4 -external-plugin-path /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/usr/lib/swift/host/plugins\#/Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/usr/bin/swift-plugin-server -external-plugin-path /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/usr/local/lib/swift/host/plugins\#/Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/AppleTVOS.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/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport.swiftdoc -emit-module-source-info-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport.swiftsourceinfo -emit-objc-header-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport-Swift.h -serialize-diagnostics-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport-master-emit-module.dia -emit-dependencies-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport-master-emit-module.d -o /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport.swiftmodule -emit-abi-descriptor-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport.abi.json
EmitSwiftModule normal arm64 (in target 'URLSessionBackport' from project 'URLSessionBackport')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

/Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/AsyncBytes.swift:19:22: error: 'AsyncBytes' is only available in tvOS 15.0 or newer
extension URLSession.AsyncBytes.Iterator: BytesProvider {}
                     ^
/Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/AsyncBytes.swift:19:1: note: add @available attribute to enclosing extension
extension URLSession.AsyncBytes.Iterator: BytesProvider {}
^
/Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/AsyncBytes.swift:47:39: error: 'AsyncBytes' is only available in tvOS 15.0 or newer
        init(_ asyncBytes: URLSession.AsyncBytes) {
                                      ^
/Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/AsyncBytes.swift:47:9: note: add @available attribute to enclosing initializer
        init(_ asyncBytes: URLSession.AsyncBytes) {
        ^
/Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/AsyncBytes.swift:24:19: note: add @available attribute to enclosing struct
    public struct AsyncBytes : AsyncSequence {
                  ^
SwiftCompile normal arm64 Compiling\ TaskDelegateHandler.swift /Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/TaskDelegateHandler.swift (in target 'URLSessionBackport' from project 'URLSessionBackport')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/URLSessionBackport/TaskDelegateHandler.swift (in target 'URLSessionBackport' from project 'URLSessionBackport')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

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

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

** BUILD FAILED **
The following build commands failed:
	SwiftEmitModule normal arm64 Emitting\ module\ for\ URLSessionBackport (in target 'URLSessionBackport' from project 'URLSessionBackport')
	EmitSwiftModule normal arm64 (in target 'URLSessionBackport' from project 'URLSessionBackport')
	Building workspace spi-builder-workspace with scheme URLSessionBackport
(3 failures)
BUILD FAILURE 6.1 tvOS