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Track the adoption of Swift 6 strict concurrency checks for data race safety. How many packages are Ready for Swift 6?

Build Information

Failed to build SignalHandler, reference main (bb52b9), with Swift 6.1 for iOS using Xcode 16.3 on 28 Apr 2025 09:05:40 UTC.

Build Command

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

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/Genaro-Chris/SignalHandler.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/Genaro-Chris/SignalHandler
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at bb52b9c fix the signal handling bug
Cloned https://github.com/Genaro-Chris/SignalHandler.git
Revision (git rev-parse @):
bb52b9c5df6eba21adb6d540a19a2da6e6fab2fa
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/Genaro-Chris/SignalHandler.git at main
========================================
Build
========================================
Selected platform:         iOS
Swift version:             6.1
Building package at path:  $PWD
https://github.com/Genaro-Chris/SignalHandler.git
https://github.com/Genaro-Chris/SignalHandler.git
{
  "dependencies" : [
    {
      "identity" : "swift-docc-plugin",
      "requirement" : {
        "branch" : [
          "main"
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-docc-plugin"
    }
  ],
  "manifest_display_name" : "SignalHandler",
  "name" : "SignalHandler",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "Linux",
      "version" : "1.0.0"
    },
    {
      "name" : "macos",
      "version" : "10.15"
    }
  ],
  "products" : [
    {
      "name" : "SignalHandler",
      "targets" : [
        "SignalHandler"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SignalHandler",
      "module_type" : "SwiftTarget",
      "name" : "SignalHandler",
      "path" : "Sources/SignalHandler",
      "product_memberships" : [
        "SignalHandler"
      ],
      "sources" : [
        "SignalHandler.swift",
        "Signals.swift",
        "SourceSequence.swift",
        "extensions.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.8"
}
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
Fetching from https://github.com/apple/swift-docc-plugin
Fetching from https://github.com/swiftlang/swift-docc-symbolkit (cached)
Creating working copy of package ‘swift-docc-plugin’
Checking out main (8357c77) of package ‘swift-docc-plugin’
Creating working copy of package ‘swift-docc-symbolkit’
Checking out 1.0.0 of package ‘swift-docc-symbolkit’
Resolve Package Graph
Resolved source packages:
  SwiftDocCPlugin: https://github.com/apple/swift-docc-plugin @ main (8357c77)
  SymbolKit: https://github.com/swiftlang/swift-docc-symbolkit @ 1.0.0
  SignalHandler: /Users/admin/builder/spi-builder-workspace
resolved source packages: SwiftDocCPlugin, SymbolKit, SignalHandler
{
  "dependencies" : [
    {
      "identity" : "swift-docc-plugin",
      "requirement" : {
        "branch" : [
          "main"
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-docc-plugin"
    }
  ],
  "manifest_display_name" : "SignalHandler",
  "name" : "SignalHandler",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "Linux",
      "version" : "1.0.0"
    },
    {
      "name" : "macos",
      "version" : "10.15"
    }
  ],
  "products" : [
    {
      "name" : "SignalHandler",
      "targets" : [
        "SignalHandler"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SignalHandler",
      "module_type" : "SwiftTarget",
      "name" : "SignalHandler",
      "path" : "Sources/SignalHandler",
      "product_memberships" : [
        "SignalHandler"
      ],
      "sources" : [
        "SignalHandler.swift",
        "Signals.swift",
        "SourceSequence.swift",
        "extensions.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.8"
}
{
  "workspace" : {
    "name" : "spi-builder-workspace",
    "schemes" : [
      "SignalHandler"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme SignalHandler -destination generic/platform=iOS 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 SignalHandler -destination generic/platform=iOS "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
Resolve Package Graph
Resolved source packages:
  SymbolKit: https://github.com/swiftlang/swift-docc-symbolkit @ 1.0.0
  SignalHandler: /Users/admin/builder/spi-builder-workspace
  SwiftDocCPlugin: https://github.com/apple/swift-docc-plugin @ main (8357c77)
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (2 targets)
    Target 'SignalHandler' in project 'SignalHandler'
        ➜ Explicit dependency on target 'SignalHandler' in project 'SignalHandler'
    Target 'SignalHandler' in project 'SignalHandler' (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/iPhoneOS.platform/Developer/SDKs/iPhoneOS18.4.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: a484cf82426c9c235d15d88ba3a6e29d
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/a484cf82426c9c235d15d88ba3a6e29d.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
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
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/iPhoneOS.platform/Developer/SDKs/iPhoneOS18.4.sdk /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/iphoneos18.4-22E235-339d34bc69d7fc736c3220795c36f340.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/iPhoneOS.platform/Developer/SDKs/iPhoneOS18.4.sdk -o /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/iphoneos18.4-22E235-339d34bc69d7fc736c3220795c36f340.sdkstatcache
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-iphoneos
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-iphoneos
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/EagerLinkingTBDs/Debug-iphoneos
    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-iphoneos
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-iphoneos/PackageFrameworks
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-iphoneos/PackageFrameworks
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/SignalHandler.modulemap (in target 'SignalHandler' from project 'SignalHandler')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/SignalHandler.modulemap
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/SignalHandler.DependencyStaticMetadataFileList (in target 'SignalHandler' from project 'SignalHandler')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/SignalHandler.DependencyStaticMetadataFileList
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/SignalHandler.DependencyMetadataFileList (in target 'SignalHandler' from project 'SignalHandler')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/SignalHandler.DependencyMetadataFileList
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler.LinkFileList (in target 'SignalHandler' from project 'SignalHandler')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler.LinkFileList
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler.SwiftFileList (in target 'SignalHandler' from project 'SignalHandler')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler.SwiftFileList
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler.SwiftConstValuesFileList (in target 'SignalHandler' from project 'SignalHandler')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler.SwiftConstValuesFileList
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler-OutputFileMap.json (in target 'SignalHandler' from project 'SignalHandler')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler-OutputFileMap.json
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler_const_extract_protocols.json (in target 'SignalHandler' from project 'SignalHandler')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler_const_extract_protocols.json
Copy /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/GeneratedModuleMaps-iphoneos/SignalHandler.modulemap /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/SignalHandler.modulemap (in target 'SignalHandler' from project 'SignalHandler')
    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/SignalHandler.build/Debug-iphoneos/SignalHandler.build/SignalHandler.modulemap /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/GeneratedModuleMaps-iphoneos
SwiftDriver SignalHandler normal arm64 com.apple.xcode.tools.swift.compiler (in target 'SignalHandler' from project 'SignalHandler')
    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 SignalHandler -Onone -enforce-exclusivity\=checked @/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler.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/iPhoneOS.platform/Developer/SDKs/iPhoneOS18.4.sdk -target arm64-apple-ios12.0 -g -module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex -Xfrontend -serialize-debugging-options -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-iphoneos -I /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-iphoneos -F /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/Frameworks -F /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS18.4.sdk/Developer/Library/Frameworks -c -j10 -enable-batch-mode -incremental -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/iphoneos18.4-22E235-339d34bc69d7fc736c3220795c36f340.sdkstatcache -output-file-map /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler-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/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler.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/SignalHandler.build/Debug-iphoneos/SignalHandler.build/swift-overrides.hmap -emit-const-values -Xfrontend -const-gather-protocols-file -Xfrontend /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler_const_extract_protocols.json -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-iphoneos/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.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/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler-Swift.h -working-directory /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode -experimental-emit-module-separately -disable-cmo
SwiftEmitModule normal arm64 Emitting\ module\ for\ SignalHandler (in target 'SignalHandler' from project 'SignalHandler')
EmitSwiftModule normal arm64 (in target 'SignalHandler' from project 'SignalHandler')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:32:14: error: concurrency is only available in iOS 13.0.0 or newer
public actor SignalHandler {
             ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:32:14: note: add @available attribute to enclosing actor
public actor SignalHandler {
             ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:92:31: error: concurrency is only available in iOS 13.0.0 or newer
        private func notify() async
                              ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:92:22: note: add @available attribute to enclosing instance method
        private func notify() async
                     ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:32:14: note: add @available attribute to enclosing actor
public actor SignalHandler {
             ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:114:25: error: concurrency is only available in iOS 13.0.0 or newer
    public func start() async {
                        ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:114:17: note: add @available attribute to enclosing instance method
    public func start() async {
                ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:32:14: note: add @available attribute to enclosing actor
public actor SignalHandler {
             ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:149:7: error: concurrency is only available in iOS 13.0.0 or newer
    ) async {
      ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:147:36: note: add @available attribute to enclosing static method
    public static nonisolated func start(
                                   ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:32:14: note: add @available attribute to enclosing actor
public actor SignalHandler {
             ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:181:7: error: concurrency is only available in iOS 13.0.0 or newer
    ) async {
      ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:179:36: note: add @available attribute to enclosing static method
    public static nonisolated func start(
                                   ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:32:14: note: add @available attribute to enclosing actor
public actor SignalHandler {
             ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SourceSequence.swift:10:25: error: 'AsyncStream' is only available in iOS 13.0 or newer
    let projectedValue: AsyncStream<Element>
                        ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SourceSequence.swift:2:8: note: add @available attribute to enclosing generic struct
struct SourceSequence<Element> {
       ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SourceSequence.swift:11:31: error: 'AsyncStream' is only available in iOS 13.0 or newer
    private let continuation: AsyncStream<Element>.Continuation
                              ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SourceSequence.swift:2:8: note: add @available attribute to enclosing generic struct
struct SourceSequence<Element> {
       ^
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/SignalHandler/SignalHandler.swift /Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/Signals.swift /Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SourceSequence.swift /Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/extensions.swift -target arm64-apple-ios12.0 -Xllvm -aarch64-use-tbi -enable-objc-interop -sdk /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS18.4.sdk -I /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-iphoneos -I /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-iphoneos -F /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/Frameworks -F /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS18.4.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 -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/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler_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/iphoneos18.4-22E235-339d34bc69d7fc736c3220795c36f340.sdkstatcache -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/swift-overrides.hmap -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-iphoneos/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -module-name SignalHandler -frontend-parseable-output -disable-clang-spi -target-sdk-version 18.4 -target-sdk-name iphoneos18.4 -external-plugin-path /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/lib/swift/host/plugins\#/Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/swift-plugin-server -external-plugin-path /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/local/lib/swift/host/plugins\#/Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/iPhoneOS.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/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler.swiftdoc -emit-module-source-info-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler.swiftsourceinfo -emit-objc-header-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler-Swift.h -serialize-diagnostics-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler-master-emit-module.dia -emit-dependencies-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler-master-emit-module.d -o /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler.swiftmodule -emit-abi-descriptor-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler.abi.json
SwiftCompile normal arm64 Compiling\ SignalHandler.swift /Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift (in target 'SignalHandler' from project 'SignalHandler')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift (in target 'SignalHandler' from project 'SignalHandler')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

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

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

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

** BUILD FAILED **
The following build commands failed:
	EmitSwiftModule normal arm64 (in target 'SignalHandler' from project 'SignalHandler')
	SwiftEmitModule normal arm64 Emitting\ module\ for\ SignalHandler (in target 'SignalHandler' from project 'SignalHandler')
	Building workspace spi-builder-workspace with scheme SignalHandler
(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:
  SymbolKit: https://github.com/swiftlang/swift-docc-symbolkit @ 1.0.0
  SwiftDocCPlugin: https://github.com/apple/swift-docc-plugin @ main (8357c77)
  SignalHandler: /Users/admin/builder/spi-builder-workspace
resolved source packages: SymbolKit, SwiftDocCPlugin, SignalHandler
{
  "dependencies" : [
    {
      "identity" : "swift-docc-plugin",
      "requirement" : {
        "branch" : [
          "main"
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-docc-plugin"
    }
  ],
  "manifest_display_name" : "SignalHandler",
  "name" : "SignalHandler",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "Linux",
      "version" : "1.0.0"
    },
    {
      "name" : "macos",
      "version" : "10.15"
    }
  ],
  "products" : [
    {
      "name" : "SignalHandler",
      "targets" : [
        "SignalHandler"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SignalHandler",
      "module_type" : "SwiftTarget",
      "name" : "SignalHandler",
      "path" : "Sources/SignalHandler",
      "product_memberships" : [
        "SignalHandler"
      ],
      "sources" : [
        "SignalHandler.swift",
        "Signals.swift",
        "SourceSequence.swift",
        "extensions.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.8"
}
{
  "workspace" : {
    "name" : "spi-builder-workspace",
    "schemes" : [
      "SignalHandler"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme SignalHandler -destination generic/platform=iOS
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 SignalHandler -destination generic/platform=iOS
Resolve Package Graph
Resolved source packages:
  SymbolKit: https://github.com/swiftlang/swift-docc-symbolkit @ 1.0.0
  SignalHandler: /Users/admin/builder/spi-builder-workspace
  SwiftDocCPlugin: https://github.com/apple/swift-docc-plugin @ main (8357c77)
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (2 targets)
    Target 'SignalHandler' in project 'SignalHandler'
        ➜ Explicit dependency on target 'SignalHandler' in project 'SignalHandler'
    Target 'SignalHandler' in project 'SignalHandler' (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/iPhoneOS.platform/Developer/SDKs/iPhoneOS18.4.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: 22398655ec755e6e2cd130b2d2386f03
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/22398655ec755e6e2cd130b2d2386f03.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/iPhoneOS.platform/Developer/SDKs/iPhoneOS18.4.sdk /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/iphoneos18.4-22E235-339d34bc69d7fc736c3220795c36f340.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/iPhoneOS.platform/Developer/SDKs/iPhoneOS18.4.sdk -o /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/iphoneos18.4-22E235-339d34bc69d7fc736c3220795c36f340.sdkstatcache
SwiftDriver SignalHandler normal arm64 com.apple.xcode.tools.swift.compiler (in target 'SignalHandler' from project 'SignalHandler')
    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 SignalHandler -Onone -enforce-exclusivity\=checked @/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler.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/iPhoneOS.platform/Developer/SDKs/iPhoneOS18.4.sdk -target arm64-apple-ios12.0 -g -module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex -Xfrontend -serialize-debugging-options -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-iphoneos -I /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-iphoneos -F /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/Frameworks -F /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS18.4.sdk/Developer/Library/Frameworks -c -j10 -enable-batch-mode -incremental -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/iphoneos18.4-22E235-339d34bc69d7fc736c3220795c36f340.sdkstatcache -output-file-map /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler-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/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler.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/SignalHandler.build/Debug-iphoneos/SignalHandler.build/swift-overrides.hmap -emit-const-values -Xfrontend -const-gather-protocols-file -Xfrontend /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler_const_extract_protocols.json -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-iphoneos/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.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/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler-Swift.h -working-directory /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode -experimental-emit-module-separately -disable-cmo
SwiftEmitModule normal arm64 Emitting\ module\ for\ SignalHandler (in target 'SignalHandler' from project 'SignalHandler')
EmitSwiftModule normal arm64 (in target 'SignalHandler' from project 'SignalHandler')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:32:14: error: concurrency is only available in iOS 13.0.0 or newer
public actor SignalHandler {
             ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:32:14: note: add @available attribute to enclosing actor
public actor SignalHandler {
             ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:92:31: error: concurrency is only available in iOS 13.0.0 or newer
        private func notify() async
                              ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:92:22: note: add @available attribute to enclosing instance method
        private func notify() async
                     ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:32:14: note: add @available attribute to enclosing actor
public actor SignalHandler {
             ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:114:25: error: concurrency is only available in iOS 13.0.0 or newer
    public func start() async {
                        ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:114:17: note: add @available attribute to enclosing instance method
    public func start() async {
                ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:32:14: note: add @available attribute to enclosing actor
public actor SignalHandler {
             ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:149:7: error: concurrency is only available in iOS 13.0.0 or newer
    ) async {
      ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:147:36: note: add @available attribute to enclosing static method
    public static nonisolated func start(
                                   ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:32:14: note: add @available attribute to enclosing actor
public actor SignalHandler {
             ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:181:7: error: concurrency is only available in iOS 13.0.0 or newer
    ) async {
      ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:179:36: note: add @available attribute to enclosing static method
    public static nonisolated func start(
                                   ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift:32:14: note: add @available attribute to enclosing actor
public actor SignalHandler {
             ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SourceSequence.swift:10:25: error: 'AsyncStream' is only available in iOS 13.0 or newer
    let projectedValue: AsyncStream<Element>
                        ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SourceSequence.swift:2:8: note: add @available attribute to enclosing generic struct
struct SourceSequence<Element> {
       ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SourceSequence.swift:11:31: error: 'AsyncStream' is only available in iOS 13.0 or newer
    private let continuation: AsyncStream<Element>.Continuation
                              ^
/Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SourceSequence.swift:2:8: note: add @available attribute to enclosing generic struct
struct SourceSequence<Element> {
       ^
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/SignalHandler/SignalHandler.swift /Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/Signals.swift /Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SourceSequence.swift /Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/extensions.swift -target arm64-apple-ios12.0 -Xllvm -aarch64-use-tbi -enable-objc-interop -sdk /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS18.4.sdk -I /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-iphoneos -I /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-iphoneos -F /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/Frameworks -F /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS18.4.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 -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/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler_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/iphoneos18.4-22E235-339d34bc69d7fc736c3220795c36f340.sdkstatcache -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/swift-overrides.hmap -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug-iphoneos/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -module-name SignalHandler -frontend-parseable-output -disable-clang-spi -target-sdk-version 18.4 -target-sdk-name iphoneos18.4 -external-plugin-path /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/lib/swift/host/plugins\#/Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/swift-plugin-server -external-plugin-path /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/local/lib/swift/host/plugins\#/Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/iPhoneOS.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/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler.swiftdoc -emit-module-source-info-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler.swiftsourceinfo -emit-objc-header-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler-Swift.h -serialize-diagnostics-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler-master-emit-module.dia -emit-dependencies-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler-master-emit-module.d -o /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler.swiftmodule -emit-abi-descriptor-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SignalHandler.build/Debug-iphoneos/SignalHandler.build/Objects-normal/arm64/SignalHandler.abi.json
SwiftCompile normal arm64 Compiling\ SignalHandler.swift /Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift (in target 'SignalHandler' from project 'SignalHandler')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/SignalHandler/SignalHandler.swift (in target 'SignalHandler' from project 'SignalHandler')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

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

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

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

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