Swift Package IndexBuild Information
Failed to build URLSessionBackport, reference main (133026), with Swift 6.3 for tvOS using Xcode 26.4 on 12 Apr 2026 14:29:10 UTC.
Build Command
env DEVELOPER_DIR=/Applications/Xcode-26.4.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme URLSessionBackport -destination generic/platform=tvOSBuild Log
========================================
RunAll
========================================
Builder version: 4.70.0
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: 6.3
Building package at path: $PWD
https://github.com/mochidev/URLSessionBackport.git
Command line invocation:
/Applications/Xcode-26.4.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
Resolve Package Graph
Resolved source packages:
URLSessionBackport: /Users/admin/builder/spi-builder-workspace
resolved source packages: URLSessionBackport
2026-04-12 10:28:52.942 xcodebuild[529:3110] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
{
"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"
]
}
}
2026-04-12 10:29:01.051 xcodebuild[631:3860] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-26.4.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme URLSessionBackport -destination generic/platform=tvOS
Command line invocation:
/Applications/Xcode-26.4.0.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-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -isysroot /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS26.4.sdk -x c -c /dev/null
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc --version
ExecuteExternalTool /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld -version_details
Build description signature: 97df48fbf27223656a30ff1d5fcd6085
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/97df48fbf27223656a30ff1d5fcd6085.xcbuilddata
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
ClangStatCache /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang-stat-cache /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS26.4.sdk /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/appletvos26.4-23L236-688ef53f1462e2c8f657fdc38a81448fe9417fc108aa677fd4261ecaa021a5e7.sdkstatcache
cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
/Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang-stat-cache /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS26.4.sdk -o /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/appletvos26.4-23L236-688ef53f1462e2c8f657fdc38a81448fe9417fc108aa677fd4261ecaa021a5e7.sdkstatcache
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SwiftExplicitPrecompiledModules
cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SwiftExplicitPrecompiledModules
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/ExplicitPrecompiledModules
cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/ExplicitPrecompiledModules
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.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/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/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.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.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_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-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-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc -module-name URLSessionBackport -Onone @/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport.SwiftFileList -DSWIFT_PACKAGE -DDEBUG -DSWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -DXcode -plugin-path /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins/testing -enable-experimental-feature DebugDescriptionMacro -sdk /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS26.4.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 -Xcc -D_LIBCPP_HARDENING_MODE\=_LIBCPP_HARDENING_MODE_DEBUG -swift-version 5 -I /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-appletvos -Isystem /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-appletvos -F /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/Library/Frameworks -F /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS26.4.sdk/Developer/Library/Frameworks -c -j10 -enable-batch-mode -incremental -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/appletvos26.4-23L236-688ef53f1462e2c8f657fdc38a81448fe9417fc108aa677fd4261ecaa021a5e7.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 -explicit-module-build -module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SwiftExplicitPrecompiledModules -clang-scanner-module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex -sdk-module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex -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
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/_SwiftConcurrencyShims-96MY5YMIZE1U4MOE11R9ULKIT.pcm
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/_Builtin_stddef-C6Z7GBHIDKCEKLMFM2YYI3A7W.pcm
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/_Builtin_float-9H0QRNNC5ZMLD86R6TPVNQQLB.pcm
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/_AvailabilityInternal-AQ1HY8MQB40OBEMHIY1GTTYAP.pcm
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/ptrcheck-1IU6E9SKRA3YNK7CWSCP8LFFS.pcm
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/_Builtin_stdarg-6IR74AZANZ723GQ22P5KSUCNO.pcm
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/SwiftShims-9YF1YACEBW6IEGLI4RGNNNLKV.pcm
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/_Builtin_stdbool-CTW4BL8O8PXECFGEXKIKZLVOF.pcm
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/ptrauth-A40102RLLHJJJ9IDUDEST5BCC.pcm
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/_DarwinFoundation1-C8K25E426DLKPVCAJ8SHHXWCC.pcm
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/_Builtin_limits-AJ9HGUY5IRAH91VM50P1L9B11.pcm
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/_DarwinFoundation2-83M597VMZ10XO5UMBNT95WK00.pcm
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/sys_types-4OHVUM6HD4FHWY3AVYX8MYOG5.pcm
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/_Builtin_stdint-2JW6725WSOM329AHHOI2IXHEL.pcm
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/_DarwinFoundation3-2FMS4S00LDVTM3A5F3HG2NCPF.pcm
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/_Builtin_inttypes-EK28CMNHQB1F0TL1JOVI3MZKI.pcm
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/Darwin-5GDWD1R0ICI11NFRTJALQMUXN.pcm
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/ObjectiveC-4QNQ63T8WBQT7Y6WL2QAAYPBA.pcm
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/os_object-26N59NSK2V9GM0RAGWJKYQ34I.pcm
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/os_workgroup-9LU39TAQEKUMHYW4P4QHHRUB5.pcm
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/Dispatch-3L2DRS4XWXWJFWZ35FJ52YWX5.pcm
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/XPC-C379776BHPBCF6T0UJQ2T5KDU.pcm
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/CoreFoundation-D0YBWMNC4I2CMNNCJIKGGV2JT.pcm
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/Security-407VQ2T1SPKBHZUHTGS89B2G3.pcm
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/CFNetwork-AUUBCXQJ3JUND273V2HIDNB00.pcm
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/Foundation-DBRMRWHF30W1EVX28MPWOGTP4.pcm
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\ 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
SwiftEmitModule normal arm64 Emitting\ module\ for\ URLSessionBackport (in target 'URLSessionBackport' from project 'URLSessionBackport')
Failed frontend command:
/Applications/Xcode-26.4.0.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 -load-resolved-plugin /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/usr/lib/swift/host/plugins/libFoundationMacros.dylib\#/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/usr/bin/swift-plugin-server\#FoundationMacros -load-resolved-plugin /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/usr/lib/swift/host/plugins/libObservationMacros.dylib\#/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/usr/bin/swift-plugin-server\#ObservationMacros -load-resolved-plugin /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/usr/lib/swift/host/plugins/libSwiftMacros.dylib\#/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/usr/bin/swift-plugin-server\#SwiftMacros -disable-implicit-swift-modules -Xcc -fno-implicit-modules -Xcc -fno-implicit-module-maps -explicit-swift-module-map-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport-dependencies-1.json -Xllvm -aarch64-use-tbi -enable-objc-interop -stack-check -sdk /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS26.4.sdk -I /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-appletvos -Isystem /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-appletvos -F /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/Library/Frameworks -F /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS26.4.sdk/Developer/Library/Frameworks -no-color-diagnostics -Xcc -fno-color-diagnostics -enable-testing -g -debug-info-format\=dwarf -dwarf-version\=4 -module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SwiftExplicitPrecompiledModules -profile-generate -profile-coverage-mapping -swift-version 5 -Onone -D SWIFT_PACKAGE -D DEBUG -D SWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -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 -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 -enable-anonymous-context-mangled-names -file-compilation-dir /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode -Xcc -D_LIBCPP_HARDENING_MODE\=_LIBCPP_HARDENING_MODE_DEBUG -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/appletvos26.4-23L236-688ef53f1462e2c8f657fdc38a81448fe9417fc108aa677fd4261ecaa021a5e7.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 -no-auto-bridging-header-chaining -module-name URLSessionBackport -frontend-parseable-output -disable-clang-spi -clang-target arm64-apple-tvos26.4 -target-sdk-version 26.4 -target-sdk-name appletvos26.4 -in-process-plugin-server-path /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/libSwiftInProcPluginServer.dylib -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-primary-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-primary-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\ 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\ 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\ 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
2026-04-12 10:29:02.561 xcodebuild[638:3921] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
** 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-26.4.0.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
2026-04-12 10:29:07.513 xcodebuild[687:4143] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
{
"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"
]
}
}
2026-04-12 10:29:08.654 xcodebuild[697:4240] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-26.4.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme URLSessionBackport -destination generic/platform=tvOS
Command line invocation:
/Applications/Xcode-26.4.0.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
ClangStatCache /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang-stat-cache /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS26.4.sdk /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/appletvos26.4-23L236-688ef53f1462e2c8f657fdc38a81448fe9417fc108aa677fd4261ecaa021a5e7.sdkstatcache
cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
/Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang-stat-cache /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS26.4.sdk -o /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/appletvos26.4-23L236-688ef53f1462e2c8f657fdc38a81448fe9417fc108aa677fd4261ecaa021a5e7.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-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc -module-name URLSessionBackport -Onone @/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport.SwiftFileList -DSWIFT_PACKAGE -DDEBUG -DSWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -DXcode -plugin-path /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins/testing -enable-experimental-feature DebugDescriptionMacro -sdk /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS26.4.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 -Xcc -D_LIBCPP_HARDENING_MODE\=_LIBCPP_HARDENING_MODE_DEBUG -swift-version 5 -I /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-appletvos -Isystem /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-appletvos -F /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/Library/Frameworks -F /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS26.4.sdk/Developer/Library/Frameworks -c -j10 -enable-batch-mode -incremental -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/appletvos26.4-23L236-688ef53f1462e2c8f657fdc38a81448fe9417fc108aa677fd4261ecaa021a5e7.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 -explicit-module-build -module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SwiftExplicitPrecompiledModules -clang-scanner-module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex -sdk-module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex -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\ 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\ 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-26.4.0.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 -load-resolved-plugin /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/usr/lib/swift/host/plugins/libFoundationMacros.dylib\#/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/usr/bin/swift-plugin-server\#FoundationMacros -load-resolved-plugin /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/usr/lib/swift/host/plugins/libObservationMacros.dylib\#/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/usr/bin/swift-plugin-server\#ObservationMacros -load-resolved-plugin /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/usr/lib/swift/host/plugins/libSwiftMacros.dylib\#/Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/usr/bin/swift-plugin-server\#SwiftMacros -disable-implicit-swift-modules -Xcc -fno-implicit-modules -Xcc -fno-implicit-module-maps -explicit-swift-module-map-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/URLSessionBackport.build/Debug-appletvos/URLSessionBackport.build/Objects-normal/arm64/URLSessionBackport-dependencies-1.json -Xllvm -aarch64-use-tbi -enable-objc-interop -stack-check -sdk /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS26.4.sdk -I /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-appletvos -Isystem /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-appletvos -F /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/Library/Frameworks -F /Applications/Xcode-26.4.0.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS26.4.sdk/Developer/Library/Frameworks -no-color-diagnostics -Xcc -fno-color-diagnostics -enable-testing -g -debug-info-format\=dwarf -dwarf-version\=4 -module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SwiftExplicitPrecompiledModules -profile-generate -profile-coverage-mapping -swift-version 5 -Onone -D SWIFT_PACKAGE -D DEBUG -D SWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -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 -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 -enable-anonymous-context-mangled-names -file-compilation-dir /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode -Xcc -D_LIBCPP_HARDENING_MODE\=_LIBCPP_HARDENING_MODE_DEBUG -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/appletvos26.4-23L236-688ef53f1462e2c8f657fdc38a81448fe9417fc108aa677fd4261ecaa021a5e7.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 -no-auto-bridging-header-chaining -module-name URLSessionBackport -frontend-parseable-output -disable-clang-spi -clang-target arm64-apple-tvos26.4 -target-sdk-version 26.4 -target-sdk-name appletvos26.4 -in-process-plugin-server-path /Applications/Xcode-26.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/libSwiftInProcPluginServer.dylib -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-primary-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-primary-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\ 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
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
2026-04-12 10:29:09.622 xcodebuild[700:4277] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
** 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 6.3 tvOS