Swift Package Index

Build Information

Failed to build swift-syntax, reference main (56ef32), with Swift 6.4 for macOS (SPM) on 20 Sep 2026 22:48:06 UTC.

Build Command

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

Build 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/peripheryapp/swift-syntax.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/peripheryapp/swift-syntax
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 56ef324 Merge pull request #1668 from ahoppen/ahoppen/drop-keyword-suffix
Cloned https://github.com/peripheryapp/swift-syntax.git
Revision (git rev-parse @):
56ef324e094ad1e655ae7d8c8dabadc7e6bd64e9
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/peripheryapp/swift-syntax.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/peripheryapp/swift-syntax.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-27.0.0-Release.Candidate.app xcrun swift build --arch arm64
Building for debugging...
[Computing dependencies]
[Pre-planning 1 / 1025]
[Planning deferred tasks]
[148 / 323]
[151 / 325] ArgumentParserToolInfo
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[171 / 343] SwiftSyntax
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[223 / 415] SwiftSyntax
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[227 / 415] SwiftSyntax
[229 / 415] SwiftSyntax
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[257 / 415] SwiftSyntax
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[355 / 490] SwiftBasicFormat
[364 / 490]
[369 / 490] SwiftBasicFormat-product
Fetching https://github.com/apple/swift-argument-parser.git
[1/18918] Fetching swift-argument-parser
Fetched https://github.com/apple/swift-argument-parser.git (1.91s)
Computing version for https://github.com/apple/swift-argument-parser.git
Computed https://github.com/apple/swift-argument-parser.git at 1.8.2 (2.52s)
Creating working copy for https://github.com/apple/swift-argument-parser.git
Working copy of https://github.com/apple/swift-argument-parser.git resolved at 1.8.2
/Users/admin/builder/spi-builder-workspace/Sources/SwiftSyntax/SyntaxText.swift:15:22: warning: safely use '@_implementationOnly' without library evolution by setting '-enable-experimental-feature CheckImplementationOnly' for 'SwiftSyntax' [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/implementation-only-deprecated\ImplementationOnlyDeprecated]8;;\]
 13 | #if !SWIFT_SYNTAX_ALWAYS_SINGLE_THREADED
 14 | #if canImport(Darwin)
 15 | @_implementationOnly import Darwin
    |                      `- warning: safely use '@_implementationOnly' without library evolution by setting '-enable-experimental-feature CheckImplementationOnly' for 'SwiftSyntax' [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/implementation-only-deprecated\ImplementationOnlyDeprecated]8;;\]
 16 | #elseif canImport(Glibc)
 17 | @_implementationOnly import Glibc
[#ImplementationOnlyDeprecated]: <https://docs.swift.org/compiler/documentation/diagnostics/implementation-only-deprecated>
/Users/admin/builder/spi-builder-workspace/Sources/SwiftSyntax/SyntaxText.swift:15:22: warning: safely use '@_implementationOnly' without library evolution by setting '-enable-experimental-feature CheckImplementationOnly' for 'SwiftSyntax' [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/implementation-only-deprecated\ImplementationOnlyDeprecated]8;;\]
 13 | #if !SWIFT_SYNTAX_ALWAYS_SINGLE_THREADED
 14 | #if canImport(Darwin)
 15 | @_implementationOnly import Darwin
    |                      `- warning: safely use '@_implementationOnly' without library evolution by setting '-enable-experimental-feature CheckImplementationOnly' for 'SwiftSyntax' [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/implementation-only-deprecated\ImplementationOnlyDeprecated]8;;\]
 16 | #elseif canImport(Glibc)
 17 | @_implementationOnly import Glibc
[#ImplementationOnlyDeprecated]: <https://docs.swift.org/compiler/documentation/diagnostics/implementation-only-deprecated>
error: SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/SwiftBasicFormat/BasicFormat.swift failed with a nonzero exit code. Command line:     cd /Users/admin/builder
    builtin-SwiftPerFileCompile BasicFormat.swift
/Users/admin/builder/spi-builder-workspace/Sources/SwiftBasicFormat/BasicFormat.swift:362:14: error: use of local variable 'trailingTrivia' before its declaration
360 |     lazy var combinedTrailingTrivia: Trivia = {
361 |       let nextTokenLeadingWhitespace = nextToken?.leadingTrivia.prefix(while: { $0.isSpaceOrTab }) ?? []
362 |       return trailingTrivia + Trivia(pieces: nextTokenLeadingWhitespace)
    |              `- error: use of local variable 'trailingTrivia' before its declaration
363 |     }()
364 |
365 |     var leadingTrivia = token.leadingTrivia
366 |     var trailingTrivia = token.trailingTrivia
    |         `- note: 'trailingTrivia' declared here
367 |
368 |     if requiresNewline(between: previousToken, and: token) {
Failed frontend command:
/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift-frontend -frontend -c -primary-file /Users/admin/builder/spi-builder-workspace/Sources/SwiftBasicFormat/BasicFormat.swift /Users/admin/builder/spi-builder-workspace/Sources/SwiftBasicFormat/SyntaxProtocol+Formatted.swift /Users/admin/builder/spi-builder-workspace/Sources/SwiftBasicFormat/Trivia+FormatExtensions.swift /Users/admin/builder/spi-builder-workspace/Sources/SwiftBasicFormat/generated/BasicFormat+Extensions.swift -emit-dependencies-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/swift-syntax.build/Debug/SwiftBasicFormat-t.build/Objects-normal/arm64/BasicFormat.d -emit-const-values-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/swift-syntax.build/Debug/SwiftBasicFormat-t.build/Objects-normal/arm64/BasicFormat.swiftconstvalues -emit-reference-dependencies-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/swift-syntax.build/Debug/SwiftBasicFormat-t.build/Objects-normal/arm64/BasicFormat.swiftdeps -serialize-diagnostics-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/swift-syntax.build/Debug/SwiftBasicFormat-t.build/Objects-normal/arm64/BasicFormat.dia -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/swift-syntax.build/Debug/SwiftBasicFormat-t.build/Objects-normal/arm64/SwiftBasicFormat-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/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/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/swift-syntax.build/Debug/SwiftBasicFormat-t.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/swift-syntax.build/Debug/SwiftBasicFormat-t.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/swift-syntax.build/Debug/SwiftBasicFormat-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name SwiftBasicFormat -const-gather-protocols-file /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/swift-syntax.build/Debug/SwiftBasicFormat-t.build/Objects-normal/arm64/SwiftBasicFormat_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 -parse-as-library -o /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/swift-syntax.build/Debug/SwiftBasicFormat-t.build/Objects-normal/arm64/BasicFormat.o -debug-module-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/swift-syntax.build/Debug/SwiftBasicFormat-t.build/Objects-normal/arm64/SwiftBasicFormat.swiftmodule -index-unit-output-path /swift-syntax.build/Debug/SwiftBasicFormat-t.build/Objects-normal/arm64/BasicFormat.o -index-store-path /Users/admin/builder/spi-builder-workspace/.build/out -index-system-modules
error: Build failed
BUILD FAILURE 6.4 macosSpm