Swift Package IndexBuild Information
Failed to build SemanticVersion, reference main (d8070b), with Swift 6.4 for macOS (SPM) on 19 Sep 2026 09:52:39 UTC.
Build Command
env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun swift build --arch arm64Build Log
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RunAll
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Builder version: 5.1.0
Interrupt handler set up.
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Checkout
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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
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Build
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Selected platform: macosSpm
Swift version: 6.4
Building package at path: $PWD
https://github.com/smumriak/SemanticVersion.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun swift build --arch arm64
Building for debugging...
[Planning deferred tasks]
[19 / 28]
[20 / 29] SemanticVersion
error: SwiftCompile normal arm64 failed with a nonzero exit code. Command line: cd /Users/admin/builder
/Users/admin/builder/spi-builder-workspace/Sources/SemanticVersion/SemanticVersion.swift:244:66: [1;31merror: [1;39mresult builder 'AlternationBuilder' does not implement any 'buildBlock' or a combination of 'buildPartialBlock(first:)' and 'buildPartialBlock(accumulated:next:)' with sufficient availability for this call site[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/result-builder-methods\ResultBuilderMethods]8;;\]
[0;36m242 |[0;0m }
[0;36m243 |[0;0m
[0;36m244 |[0;0m let preReleaseIdentifier: ChoiceOf<Substring> = ChoiceOf {
[0;36m|[0;0m `- [1;31merror: [1;39mresult builder 'AlternationBuilder' does not implement any 'buildBlock' or a combination of 'buildPartialBlock(first:)' and 'buildPartialBlock(accumulated:next:)' with sufficient availability for this call site[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/result-builder-methods\ResultBuilderMethods]8;;\]
[0;36m245 |[0;0m "0"
[0;36m246 |[0;0m positiveNumber
/Users/admin/builder/spi-builder-workspace/Sources/SemanticVersion/SemanticVersion.swift:233:30: [1;31merror: [1;39mtrailing closure passed to parameter of type 'String' that does not accept a closure[0;0m
[0;36m231 |[0;0m }
[0;36m232 |[0;0m
[0;36m233 |[0;0m static let regex = Regex [4;39m{[0;0m
[0;36m|[0;0m `- [1;31merror: [1;39mtrailing closure passed to parameter of type 'String' that does not accept a closure[0;0m
[0;36m234 |[0;0m // 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"
[0;36m235 |[0;0m // 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: [1;39mnote: [1;39m'init(_:)' declared here[0;0m
[0;36m1 |[0;0m generic struct Regex {
[0;36m2 |[0;0m public init(_ pattern: String) throws}
[0;36m|[0;0m `- [1;39mnote: [1;39m'init(_:)' declared here[0;0m
[0;36m3 |[0;0m
[#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/.build/out/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/.build/out/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/.build/out/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/.build/out/Intermediates.noindex/SwiftExplicitPrecompiledModules -color-diagnostics -Xcc -fcolor-diagnostics -enable-testing -g -debug-info-format\=dwarf -dwarf-version\=4 -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/.build/out/ModuleCache.noindex/Session.modulevalidation -Xcc -working-directory -Xcc /Users/admin/builder -enable-anonymous-context-mangled-names -file-compilation-dir /Users/admin/builder -Xcc -D_LIBCPP_HARDENING_MODE\=_LIBCPP_HARDENING_MODE_DEBUG -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.build/out/SDKStatCaches.noindex/macosx27.0-26A425-80c5bbf1d171475443272936d42f90a36a22442a12e9d48fe1a705f55a1adfc4.sdkstatcache -Xcc -fmodules-prune-interval\=86400 -Xcc -fmodules-prune-after\=345600 -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Products/Debug/include -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/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/.build/out/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/.build/out/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion.swiftdoc -emit-module-source-info-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion.swiftsourceinfo -emit-objc-header-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion-Swift.h -serialize-diagnostics-path /Users/admin/builder/spi-builder-workspace/.build/out/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/.build/out/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/.build/out/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion.swiftmodule -emit-abi-descriptor-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/SemanticVersion.build/Debug/SemanticVersion-t.build/Objects-normal/arm64/SemanticVersion.abi.json
error: Build failed
BUILD FAILURE 6.4 macosSpm