CLI – Build Information – Swift Package Index

Build Information

Failed to build CLI, reference 2.3.1 (30b84c), with Swift 6.4 for macOS (SPM) on 17 Sep 2026 03:59:04 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun swift build --arch arm64

Build Log

========================================
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/Ponyboy47/CLI.git
Reference: 2.3.1
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/Ponyboy47/CLI
 * tag               2.3.1      -> FETCH_HEAD
HEAD is now at 30b84cd Updated README for MultiOption
Cloned https://github.com/Ponyboy47/CLI.git
Revision (git rev-parse @):
30b84cd3b751789e8a53f1ca428731ae6ec4e011
SUCCESS checkout https://github.com/Ponyboy47/CLI.git at 2.3.1
========================================
Build
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Selected platform:         macosSpm
Swift version:             6.4
Building package at path:  $PWD
https://github.com/Ponyboy47/CLI.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun swift build --arch arm64
Building for debugging...
[Pre-planning 1 / 96]
[Planning deferred tasks]
[25 / 42]
[31 / 48] Strings
[45 / 56] CLI
[46 / 56] CLI
Fetching https://github.com/Ponyboy47/Strings.git
[1/104] Fetching strings
Fetched https://github.com/Ponyboy47/Strings.git (0.77s)
Computing version for https://github.com/Ponyboy47/Strings.git
Computed https://github.com/Ponyboy47/Strings.git at 2.2.1 (1.46s)
Creating working copy for https://github.com/Ponyboy47/Strings.git
Working copy of https://github.com/Ponyboy47/Strings.git resolved at 2.2.1
/Users/admin/builder/spi-builder-workspace/Sources/CLI/MultiOption.swift:73:5: [1;33mwarning: [1;39m'public' modifier is redundant for instance method declared in a public extension[0;0m
[0;36m71 |[0;0m
[0;36m72 |[0;0m public extension MultiOption where A: Equatable {
[0;36m73 |[0;0m     public func index(of element: A) -> Int? {
   [0;36m|[0;0m     `- [1;33mwarning: [1;39m'public' modifier is redundant for instance method declared in a public extension[0;0m
[0;36m74 |[0;0m         return values.index(of: element)
[0;36m75 |[0;0m     }
error: SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/CLI/MultiOption.swift failed with a nonzero exit code. Command line:     cd /Users/admin/builder
    builtin-SwiftPerFileCompile MultiOption.swift
/Users/admin/builder/spi-builder-workspace/Sources/CLI/MultiOption.swift:73:5: [1;33mwarning: [1;39m'public' modifier is redundant for instance method declared in a public extension[0;0m
[0;36m71 |[0;0m
[0;36m72 |[0;0m public extension MultiOption where A: Equatable {
[0;36m73 |[0;0m     public func index(of element: A) -> Int? {
   [0;36m|[0;0m     `- [1;33mwarning: [1;39m'public' modifier is redundant for instance method declared in a public extension[0;0m
[0;36m74 |[0;0m         return values.index(of: element)
[0;36m75 |[0;0m     }
/Users/admin/builder/spi-builder-workspace/Sources/CLI/MultiOption.swift:52:16: [1;31merror: [1;39m'subscript(_:)' is unavailable[0;0m
[0;36m50 |[0;0m
[0;36m51 |[0;0m     public subscript(bounds: Range<Int>) -> Slice<[A]> {
[0;36m52 |[0;0m         return [4;39mvalues[bounds][0;0m
   [0;36m|[0;0m                `- [1;31merror: [1;39m'subscript(_:)' is unavailable[0;0m
[0;36m53 |[0;0m     }
[0;36m54 |[0;0m
Swift.MutableCollection.subscript:3:21: [1;39mnote: [1;39m'subscript(_:)' has been explicitly marked unavailable here[0;0m
[0;36m1 |[0;0m protocol MutableCollection {
[0;36m2 |[0;0m @available(*, unavailable)
[0;36m3 |[0;0m   @inlinable public subscript(bounds: Range<Self.Index>) -> Slice<Self> { get set }}
  [0;36m|[0;0m                     `- [1;39mnote: [1;39m'subscript(_:)' has been explicitly marked unavailable here[0;0m
[0;36m4 |[0;0m
Failed frontend command:
/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-frontend -frontend -c /Users/admin/builder/spi-builder-workspace/Sources/CLI/ArgumentErrors.swift /Users/admin/builder/spi-builder-workspace/Sources/CLI/ArgumentParser.swift /Users/admin/builder/spi-builder-workspace/Sources/CLI/ArgumentProtocols.swift /Users/admin/builder/spi-builder-workspace/Sources/CLI/ArgumentTypes.swift -primary-file /Users/admin/builder/spi-builder-workspace/Sources/CLI/MultiOption.swift /Users/admin/builder/spi-builder-workspace/Sources/CLI/Option+Flag.swift -emit-dependencies-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/CLI.build/Debug/CLI-t.build/Objects-normal/arm64/MultiOption.d -emit-const-values-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/CLI.build/Debug/CLI-t.build/Objects-normal/arm64/MultiOption.swiftconstvalues -emit-reference-dependencies-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/CLI.build/Debug/CLI-t.build/Objects-normal/arm64/MultiOption.swiftdeps -serialize-diagnostics-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/CLI.build/Debug/CLI-t.build/Objects-normal/arm64/MultiOption.dia -target arm64-apple-macos12.0 -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/PackageFrameworks -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/ModuleCache.noindex -color-diagnostics -Xcc -fcolor-diagnostics -enable-testing -g -debug-info-format\=dwarf -dwarf-version\=4 -swift-version 4 -Onone -D SWIFT_PACKAGE -D DEBUG -D SWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -D Xcode -serialize-debugging-options -enable-experimental-feature DebugDescriptionMacro -empty-abi-descriptor -plugin-path /Applications/Xcode-27.0.0-Release.Candidate.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/.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/CLI.build/Debug/CLI-t.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/CLI.build/Debug/CLI-t.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/CLI.build/Debug/CLI-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name CLI -const-gather-protocols-file /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/CLI.build/Debug/CLI-t.build/Objects-normal/arm64/CLI_const_extract_protocols.json -disable-clang-spi -target-sdk-version 27.0 -target-sdk-name macosx27.0 -external-plugin-path /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins\#/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server -external-plugin-path /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/local/lib/swift/host/plugins\#/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server -in-process-plugin-server-path /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/libSwiftInProcPluginServer.dylib -plugin-path /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/host/plugins -plugin-path /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/local/lib/swift/host/plugins -parse-as-library -o /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/CLI.build/Debug/CLI-t.build/Objects-normal/arm64/MultiOption.o -index-unit-output-path /CLI.build/Debug/CLI-t.build/Objects-normal/arm64/MultiOption.o -index-store-path /Users/admin/builder/spi-builder-workspace/.build/out -index-system-modules
error: Build failed
BUILD FAILURE 6.4 macosSpm