Swift Package Index

Build Information

Failed to build SemanticVersion, reference main (d8070b), with Swift 6.4 for macOS (Xcode) using Xcode 27.0 on 19 Sep 2026 09:53:20 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme SemanticVersion -destination platform=macOS,arch=arm64

Build Log

========================================
RunAll
========================================
Builder version: 5.1.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/smumriak/SemanticVersion.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/smumriak/SemanticVersion
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at d8070b9 Type annotation for regex builder because swift 5.9 fails to infer types in reasonable time
Cloned https://github.com/smumriak/SemanticVersion.git
Revision (git rev-parse @):
d8070b9edb47c0f526128b8e08e87c7709d10ed9
SUCCESS checkout https://github.com/smumriak/SemanticVersion.git at main
========================================
Build
========================================
Selected platform:         macosXcodebuild
Swift version:             6.4
Building package at path:  $PWD
https://github.com/smumriak/SemanticVersion.git
Command line invocation:
    /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
Resolve Package Graph
Resolved source packages:
  SemanticVersion: /Users/admin/builder/spi-builder-workspace
resolved source packages: SemanticVersion
2026-09-19 05:52:30.164 xcodebuild[529:3015] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "SemanticVersion",
  "name" : "SemanticVersion",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "SemanticVersion",
      "targets" : [
        "SemanticVersion"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SemanticVersionTests",
      "module_type" : "SwiftTarget",
      "name" : "SemanticVersionTests",
      "path" : "Tests/SemanticVersionTests",
      "sources" : [
        "SemanticVersionTests.swift"
      ],
      "target_dependencies" : [
        "SemanticVersion"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SemanticVersion",
      "module_type" : "SwiftTarget",
      "name" : "SemanticVersion",
      "path" : "Sources/SemanticVersion",
      "product_memberships" : [
        "SemanticVersion"
      ],
      "sources" : [
        "SemanticVersion.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.7"
}
{
  "workspace" : {
    "name" : "SemanticVersion",
    "schemes" : [
      "SemanticVersion"
    ]
  }
}
2026-09-19 05:53:11.645 xcodebuild[647:4121] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme SemanticVersion -destination platform=macOS,arch=arm64
Command line invocation:
    /Applications/Xcode-27.0.0-Release.Candidate.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 SemanticVersion -destination platform=macOS,arch=arm64
Resolve Package Graph
Resolved source packages:
  SemanticVersion: /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 'SemanticVersion-product' in project 'SemanticVersion'
        ➜ Explicit dependency on target 'SemanticVersion' in project 'SemanticVersion'
    Target 'SemanticVersion' in project 'SemanticVersion' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
ExecuteExternalTool /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -isysroot /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk -x c -c /dev/null
ExecuteExternalTool /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc --version
ExecuteExternalTool /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld -version_details
Build description signature: 4f66fafbd4b7fb0ade7398746841169b
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/4f66fafbd4b7fb0ade7398746841169b.xcbuilddata
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/SDKExplicitPrecompiledModules
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/SDKExplicitPrecompiledModules
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/CompilationCache.noindex
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/CompilationCache.noindex
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex
    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-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang-stat-cache /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/macosx27.0-26A425-e829b21a6f8c9b70876ba0858053c0446a22442a12e9d48fe1a705f55a1adfc4.sdkstatcache
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang-stat-cache /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk -o /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/macosx27.0-26A425-e829b21a6f8c9b70876ba0858053c0446a22442a12e9d48fe1a705f55a1adfc4.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/PrecompiledHeaders
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/PrecompiledHeaders
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/Intermediates.noindex/EagerLinkingTBDs/Debug
    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
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug/PackageFrameworks
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug/PackageFrameworks
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/SemanticVersion.modulemap (in target 'SemanticVersion' from project 'SemanticVersion')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/SemanticVersion.modulemap
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/SemanticVersion.DependencyStaticMetadataFileList (in target 'SemanticVersion' from project 'SemanticVersion')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/SemanticVersion.DependencyStaticMetadataFileList
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/SemanticVersion.DependencyMetadataFileList (in target 'SemanticVersion' from project 'SemanticVersion')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/SemanticVersion.DependencyMetadataFileList
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion.SwiftFileList (in target 'SemanticVersion' from project 'SemanticVersion')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion.SwiftFileList
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion-OutputFileMap.json (in target 'SemanticVersion' from project 'SemanticVersion')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion-OutputFileMap.json
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion.LinkFileList (in target 'SemanticVersion' from project 'SemanticVersion')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion.LinkFileList
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion.SwiftConstValuesFileList (in target 'SemanticVersion' from project 'SemanticVersion')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion.SwiftConstValuesFileList
WriteAuxiliaryFile /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion_const_extract_protocols.json (in target 'SemanticVersion' from project 'SemanticVersion')
    cd /Users/admin/builder/spi-builder-workspace
    write-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion_const_extract_protocols.json
Copy /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/GeneratedModuleMaps/SemanticVersion.modulemap /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/SemanticVersion.modulemap (in target 'SemanticVersion' from project 'SemanticVersion')
    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/SemanticVersion.build/Debug/SemanticVersion-t.build/SemanticVersion.modulemap /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/GeneratedModuleMaps
SwiftDriver SemanticVersion normal arm64 com.apple.xcode.tools.swift.compiler (in target 'SemanticVersion' from project 'SemanticVersion')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-SwiftDriver -- /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc -parse-as-library -module-name SemanticVersion -Onone @/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion.SwiftFileList -DSWIFT_PACKAGE -DDEBUG -DSWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -DXcode -plugin-path /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins/testing -enable-experimental-feature DebugDescriptionMacro -sdk /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk -target arm64-apple-macos12.0 -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 -Isystem /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug -F /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Frameworks -c -j10 -enable-batch-mode -incremental -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/macosx27.0-26A425-e829b21a6f8c9b70876ba0858053c0446a22442a12e9d48fe1a705f55a1adfc4.sdkstatcache -output-file-map /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion-OutputFileMap.json -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/SDKExplicitPrecompiledModules -emit-dependencies -emit-module -emit-module-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion.swiftmodule -serialize-diagnostics -dependency-scan-serialize-diagnostics-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion-dependency-scan.dia -validate-clang-modules-once -clang-build-session-file /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/Session.modulevalidation -Xcc -fmodules-prune-interval\=86400 -Xcc -fmodules-prune-after\=345600 -emit-const-values -const-gather-protocols-list /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion_const_extract_protocols.json -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.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/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion-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/SDKExplicitPrecompiledModules/SwiftShims-C4V0DQ62WSTCYBYGILXXGQNO3.pcm
SwiftExplicitDependencyGeneratePcm arm64 /Users/admin/builder/spi-builder-workspace/.derivedData/SDKExplicitPrecompiledModules/_SwiftConcurrencyShims-BLUUWKI6AGMD7TJ4RGYS7DP6T.pcm
SwiftEmitModule normal arm64 Emitting\ module\ for\ SemanticVersion (in target 'SemanticVersion' from project 'SemanticVersion')
SwiftCompile normal arm64 (in target 'SemanticVersion' from project 'SemanticVersion')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

/Users/admin/builder/spi-builder-workspace/Sources/SemanticVersion/SemanticVersion.swift:244:66: error: result builder 'AlternationBuilder' does not implement any 'buildBlock' or a combination of 'buildPartialBlock(first:)' and 'buildPartialBlock(accumulated:next:)' with sufficient availability for this call site [#ResultBuilderMethods]
242 |         }
243 |
244 |         let preReleaseIdentifier: ChoiceOf<Substring> = ChoiceOf {
    |                                                                  `- error: result builder 'AlternationBuilder' does not implement any 'buildBlock' or a combination of 'buildPartialBlock(first:)' and 'buildPartialBlock(accumulated:next:)' with sufficient availability for this call site [#ResultBuilderMethods]
245 |             "0"
246 |             positiveNumber
/Users/admin/builder/spi-builder-workspace/Sources/SemanticVersion/SemanticVersion.swift:233:30: error: trailing closure passed to parameter of type 'String' that does not accept a closure
231 |     }
232 |
233 |     static let regex = Regex {
    |                              `- error: trailing closure passed to parameter of type 'String' that does not accept a closure
234 |         // Swift compiler has troubles type checking this builder. 5.8.1 takes 30 seconds to do it on my PC. 5.9 errors out with "failed to type check in reasonable type"
235 |         // One could think this is a problem of the past, but actually no. With proper type annotation made by hand build takes only 3 seconds. 10 times better
_StringProcessing.Regex.init:2:8: note: 'init(_:)' declared here
1 | generic struct Regex {
2 | public init(_ pattern: String) throws}
  |        `- note: 'init(_:)' declared here
3 |
[#ResultBuilderMethods]: <https://docs.swift.org/compiler/documentation/diagnostics/result-builder-methods>
Failed frontend command:
/Applications/Xcode-27.0.0-Release.Candidate.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/SemanticVersion/SemanticVersion.swift -target arm64-apple-macos12.0 -disable-cross-import-overlay-search -load-resolved-plugin /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins/libSwiftMacros.dylib\#/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.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/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion-dependencies-1.json -Xllvm -aarch64-use-tbi -enable-objc-interop -stack-check -sdk /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk -I /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug -Isystem /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug -F /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Frameworks -module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SwiftExplicitPrecompiledModules -no-color-diagnostics -Xcc -fno-color-diagnostics -enable-testing -g -debug-info-format\=dwarf -dwarf-version\=4 -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 -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/macosx27.0-26A425-e829b21a6f8c9b70876ba0858053c0446a22442a12e9d48fe1a705f55a1adfc4.sdkstatcache -Xcc -fmodules-prune-interval\=86400 -Xcc -fmodules-prune-after\=345600 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name SemanticVersion -const-gather-protocols-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion_const_extract_protocols.json -disable-clang-spi -clang-target arm64-apple-macos27.0 -target-sdk-version 27.0 -target-sdk-name macosx27.0 -in-process-plugin-server-path /Applications/Xcode-27.0.0-Release.Candidate.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/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion.swiftdoc -emit-module-source-info-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion.swiftsourceinfo -emit-objc-header-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion-Swift.h -serialize-diagnostics-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion-primary-emit-module.dia -emit-dependencies-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion-primary-emit-module.d -parse-as-library -o /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion.swiftmodule -emit-abi-descriptor-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion.abi.json
SwiftCompile normal arm64 Compiling\ SemanticVersion.swift /Users/admin/builder/spi-builder-workspace/Sources/SemanticVersion/SemanticVersion.swift (in target 'SemanticVersion' from project 'SemanticVersion')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/SemanticVersion/SemanticVersion.swift (in target 'SemanticVersion' from project 'SemanticVersion')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-SwiftPerFileCompile SemanticVersion.swift
/Users/admin/builder/spi-builder-workspace/Sources/SemanticVersion/SemanticVersion.swift:244:66: error: result builder 'AlternationBuilder' does not implement any 'buildBlock' or a combination of 'buildPartialBlock(first:)' and 'buildPartialBlock(accumulated:next:)' with sufficient availability for this call site [#ResultBuilderMethods]
242 |         }
243 |
244 |         let preReleaseIdentifier: ChoiceOf<Substring> = ChoiceOf {
    |                                                                  `- error: result builder 'AlternationBuilder' does not implement any 'buildBlock' or a combination of 'buildPartialBlock(first:)' and 'buildPartialBlock(accumulated:next:)' with sufficient availability for this call site [#ResultBuilderMethods]
245 |             "0"
246 |             positiveNumber
PruneExplicitPrecompiledModules /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SwiftExplicitPrecompiledModules
PruneExplicitPrecompiledModules /Users/admin/builder/spi-builder-workspace/.derivedData/SDKExplicitPrecompiledModules
PruneExplicitPrecompiledModules /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/ExplicitPrecompiledModules
2026-09-19 05:53:13.255 xcodebuild[648:4161] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
--- xcodebuild: WARNING: Using the first of multiple matching destinations:
{ platform:macOS, arch:arm64, id:2af17553bbed6e2a65668da3eddf70a049b713b7, name:My Mac }
{ platform:macOS, arch:arm64, variant:Mac Catalyst, id:2af17553bbed6e2a65668da3eddf70a049b713b7, name:My Mac }
{ platform:macOS, arch:arm64, variant:DriverKit, id:2af17553bbed6e2a65668da3eddf70a049b713b7, name:My Mac }
{ platform:macOS, arch:arm64, variant:Designed for [iPad,iPhone], id:2af17553bbed6e2a65668da3eddf70a049b713b7, name:My Mac }
** BUILD FAILED **
The following build commands failed:
	SwiftCompile normal arm64 (in target 'SemanticVersion' from project 'SemanticVersion')
	SwiftEmitModule normal arm64 Emitting\ module\ for\ SemanticVersion (in target 'SemanticVersion' from project 'SemanticVersion')
	Building workspace SemanticVersion with scheme SemanticVersion
(3 failures)
Command line invocation:
    /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
Resolved source packages:
  SemanticVersion: /Users/admin/builder/spi-builder-workspace
resolved source packages: SemanticVersion
2026-09-19 05:53:17.863 xcodebuild[667:4310] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "SemanticVersion",
  "name" : "SemanticVersion",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "SemanticVersion",
      "targets" : [
        "SemanticVersion"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SemanticVersionTests",
      "module_type" : "SwiftTarget",
      "name" : "SemanticVersionTests",
      "path" : "Tests/SemanticVersionTests",
      "sources" : [
        "SemanticVersionTests.swift"
      ],
      "target_dependencies" : [
        "SemanticVersion"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SemanticVersion",
      "module_type" : "SwiftTarget",
      "name" : "SemanticVersion",
      "path" : "Sources/SemanticVersion",
      "product_memberships" : [
        "SemanticVersion"
      ],
      "sources" : [
        "SemanticVersion.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.7"
}
{
  "workspace" : {
    "name" : "SemanticVersion",
    "schemes" : [
      "SemanticVersion"
    ]
  }
}
2026-09-19 05:53:19.059 xcodebuild[675:4378] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme SemanticVersion -destination platform=macOS,arch=arm64
Command line invocation:
    /Applications/Xcode-27.0.0-Release.Candidate.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 SemanticVersion -destination platform=macOS,arch=arm64
Resolve Package Graph
Resolved source packages:
  SemanticVersion: /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 'SemanticVersion-product' in project 'SemanticVersion'
        ➜ Explicit dependency on target 'SemanticVersion' in project 'SemanticVersion'
    Target 'SemanticVersion' in project 'SemanticVersion' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
ClangStatCache /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang-stat-cache /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/macosx27.0-26A425-e829b21a6f8c9b70876ba0858053c0446a22442a12e9d48fe1a705f55a1adfc4.sdkstatcache
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang-stat-cache /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk -o /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/macosx27.0-26A425-e829b21a6f8c9b70876ba0858053c0446a22442a12e9d48fe1a705f55a1adfc4.sdkstatcache
SwiftDriver SemanticVersion normal arm64 com.apple.xcode.tools.swift.compiler (in target 'SemanticVersion' from project 'SemanticVersion')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-SwiftDriver -- /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc -parse-as-library -module-name SemanticVersion -Onone @/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion.SwiftFileList -DSWIFT_PACKAGE -DDEBUG -DSWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -DXcode -plugin-path /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins/testing -enable-experimental-feature DebugDescriptionMacro -sdk /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk -target arm64-apple-macos12.0 -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 -Isystem /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug -F /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Frameworks -c -j10 -enable-batch-mode -incremental -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.derivedData/SDKStatCaches.noindex/macosx27.0-26A425-e829b21a6f8c9b70876ba0858053c0446a22442a12e9d48fe1a705f55a1adfc4.sdkstatcache -output-file-map /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion-OutputFileMap.json -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/SDKExplicitPrecompiledModules -emit-dependencies -emit-module -emit-module-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion.swiftmodule -serialize-diagnostics -dependency-scan-serialize-diagnostics-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion-dependency-scan.dia -validate-clang-modules-once -clang-build-session-file /Users/admin/builder/spi-builder-workspace/.derivedData/ModuleCache.noindex/Session.modulevalidation -Xcc -fmodules-prune-interval\=86400 -Xcc -fmodules-prune-after\=345600 -emit-const-values -const-gather-protocols-list /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion_const_extract_protocols.json -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.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/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion-Swift.h -working-directory /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode -experimental-emit-module-separately -disable-cmo
SwiftEmitModule normal arm64 Emitting\ module\ for\ SemanticVersion (in target 'SemanticVersion' from project 'SemanticVersion')
SwiftCompile normal arm64 (in target 'SemanticVersion' from project 'SemanticVersion')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode

/Users/admin/builder/spi-builder-workspace/Sources/SemanticVersion/SemanticVersion.swift:244:66: error: result builder 'AlternationBuilder' does not implement any 'buildBlock' or a combination of 'buildPartialBlock(first:)' and 'buildPartialBlock(accumulated:next:)' with sufficient availability for this call site [#ResultBuilderMethods]
242 |         }
243 |
244 |         let preReleaseIdentifier: ChoiceOf<Substring> = ChoiceOf {
    |                                                                  `- error: result builder 'AlternationBuilder' does not implement any 'buildBlock' or a combination of 'buildPartialBlock(first:)' and 'buildPartialBlock(accumulated:next:)' with sufficient availability for this call site [#ResultBuilderMethods]
245 |             "0"
246 |             positiveNumber
/Users/admin/builder/spi-builder-workspace/Sources/SemanticVersion/SemanticVersion.swift:233:30: error: trailing closure passed to parameter of type 'String' that does not accept a closure
231 |     }
232 |
233 |     static let regex = Regex {
    |                              `- error: trailing closure passed to parameter of type 'String' that does not accept a closure
234 |         // Swift compiler has troubles type checking this builder. 5.8.1 takes 30 seconds to do it on my PC. 5.9 errors out with "failed to type check in reasonable type"
235 |         // One could think this is a problem of the past, but actually no. With proper type annotation made by hand build takes only 3 seconds. 10 times better
_StringProcessing.Regex.init:2:8: note: 'init(_:)' declared here
1 | generic struct Regex {
2 | public init(_ pattern: String) throws}
  |        `- note: 'init(_:)' declared here
3 |
[#ResultBuilderMethods]: <https://docs.swift.org/compiler/documentation/diagnostics/result-builder-methods>
Failed frontend command:
/Applications/Xcode-27.0.0-Release.Candidate.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/SemanticVersion/SemanticVersion.swift -target arm64-apple-macos12.0 -disable-cross-import-overlay-search -load-resolved-plugin /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins/libSwiftMacros.dylib\#/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.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/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion-dependencies-1.json -Xllvm -aarch64-use-tbi -enable-objc-interop -stack-check -sdk /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX27.0.sdk -I /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug -Isystem /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib -F /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug -F /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Frameworks -module-cache-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SwiftExplicitPrecompiledModules -no-color-diagnostics -Xcc -fno-color-diagnostics -enable-testing -g -debug-info-format\=dwarf -dwarf-version\=4 -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 -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/macosx27.0-26A425-e829b21a6f8c9b70876ba0858053c0446a22442a12e9d48fe1a705f55a1adfc4.sdkstatcache -Xcc -fmodules-prune-interval\=86400 -Xcc -fmodules-prune-after\=345600 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name SemanticVersion -const-gather-protocols-file /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion_const_extract_protocols.json -disable-clang-spi -clang-target arm64-apple-macos27.0 -target-sdk-version 27.0 -target-sdk-name macosx27.0 -in-process-plugin-server-path /Applications/Xcode-27.0.0-Release.Candidate.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/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion.swiftdoc -emit-module-source-info-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion.swiftsourceinfo -emit-objc-header-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion-Swift.h -serialize-diagnostics-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion-primary-emit-module.dia -emit-dependencies-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion-primary-emit-module.d -parse-as-library -o /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion.swiftmodule -emit-abi-descriptor-path /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion.abi.json
SwiftCompile normal arm64 Compiling\ SemanticVersion.swift /Users/admin/builder/spi-builder-workspace/Sources/SemanticVersion/SemanticVersion.swift (in target 'SemanticVersion' from project 'SemanticVersion')
SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/SemanticVersion/SemanticVersion.swift (in target 'SemanticVersion' from project 'SemanticVersion')
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-SwiftPerFileCompile SemanticVersion.swift
/Users/admin/builder/spi-builder-workspace/Sources/SemanticVersion/SemanticVersion.swift:244:66: error: result builder 'AlternationBuilder' does not implement any 'buildBlock' or a combination of 'buildPartialBlock(first:)' and 'buildPartialBlock(accumulated:next:)' with sufficient availability for this call site [#ResultBuilderMethods]
242 |         }
243 |
244 |         let preReleaseIdentifier: ChoiceOf<Substring> = ChoiceOf {
    |                                                                  `- error: result builder 'AlternationBuilder' does not implement any 'buildBlock' or a combination of 'buildPartialBlock(first:)' and 'buildPartialBlock(accumulated:next:)' with sufficient availability for this call site [#ResultBuilderMethods]
245 |             "0"
246 |             positiveNumber
PruneExplicitPrecompiledModules /Users/admin/builder/spi-builder-workspace/.derivedData/SDKExplicitPrecompiledModules
PruneExplicitPrecompiledModules /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/SwiftExplicitPrecompiledModules
PruneExplicitPrecompiledModules /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/ExplicitPrecompiledModules
2026-09-19 05:53:20.013 xcodebuild[676:4405] [MT] IDERunDestination: Supported platforms for the buildables in the current scheme is empty.
--- xcodebuild: WARNING: Using the first of multiple matching destinations:
{ platform:macOS, arch:arm64, id:2af17553bbed6e2a65668da3eddf70a049b713b7, name:My Mac }
{ platform:macOS, arch:arm64, variant:Mac Catalyst, id:2af17553bbed6e2a65668da3eddf70a049b713b7, name:My Mac }
{ platform:macOS, arch:arm64, variant:DriverKit, id:2af17553bbed6e2a65668da3eddf70a049b713b7, name:My Mac }
{ platform:macOS, arch:arm64, variant:Designed for [iPad,iPhone], id:2af17553bbed6e2a65668da3eddf70a049b713b7, name:My Mac }
** BUILD FAILED **
The following build commands failed:
	SwiftCompile normal arm64 (in target 'SemanticVersion' from project 'SemanticVersion')
	SwiftEmitModule normal arm64 Emitting\ module\ for\ SemanticVersion (in target 'SemanticVersion' from project 'SemanticVersion')
	Building workspace SemanticVersion with scheme SemanticVersion
(3 failures)
BUILD FAILURE 6.4 macosXcodebuild