Swift Package Index

Build Information

Failed to build Observation, reference main (9e04c7), with Swift 6.4 for macOS (SPM) on 17 Sep 2026 22:38:20 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/0xLet/Observation.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/0xLet/Observation
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 9e04c70 Merge pull request #2 from 0xLeif/develop
Cloned https://github.com/0xLet/Observation.git
Revision (git rev-parse @):
9e04c7056782c73a8f2ad6cea43f71a1c5a9700b
SUCCESS checkout https://github.com/0xLet/Observation.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/0xLet/Observation.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 / 126]
[Planning deferred tasks]
[31 / 56]
[32 / 57] E
[39 / 64] E
[46 / 65] E
[48 / 65] Chain
[56 / 99]
[61 / 99]
[64 / 99]
[65 / 99]
[69 / 99]
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Fetching https://github.com/0xLeif/Chain
[1/119] Fetching chain
Fetched https://github.com/0xLeif/Chain (1.21s)
Computing version for https://github.com/0xLeif/Chain
Computed https://github.com/0xLeif/Chain at 0.3.0 (1.88s)
Fetching https://github.com/0xLeif/E.num
[1/130] Fetching e.num
Fetched https://github.com/0xLeif/E.num (0.79s)
Computing version for https://github.com/0xLeif/E.num
Computed https://github.com/0xLeif/E.num at 0.3.0 (1.45s)
Creating working copy for https://github.com/0xLeif/E.num
Working copy of https://github.com/0xLeif/E.num resolved at 0.3.0
Creating working copy for https://github.com/0xLeif/Chain
Working copy of https://github.com/0xLeif/Chain resolved at 0.3.0
warning: 'Chain' is missing a dependency on 'Observation' because dependency scan of Swift module 'Chain' discovered a dependency on 'Observation'
error: module dependency cycle: 'Observation (Source Target) -> Chain.swiftmodule -> Foundation.swiftmodule -> Observation.swiftmodule'
error: SwiftDriver Observation normal arm64 com.apple.xcode.tools.swift.compiler failed with a nonzero exit code. Command line:     cd /Users/admin/builder
    builtin-SwiftDriver -- /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc -parse-as-library -module-name Observation -Onone @/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/Observation.build/Debug/Observation-t.build/Objects-normal/arm64/Observation.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/.build/out/ModuleCache.noindex -Xfrontend -serialize-debugging-options -enable-testing -index-store-path /Users/admin/builder/spi-builder-workspace/.build/out -Xcc -D_LIBCPP_HARDENING_MODE\=_LIBCPP_HARDENING_MODE_DEBUG -swift-version 5 -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 -c -j10 -enable-batch-mode -incremental -Xcc -ivfsstatcache -Xcc /Users/admin/builder/spi-builder-workspace/.build/out/SDKStatCaches.noindex/macosx27.0-26A425-80c5bbf1d171475443272936d42f90a36a22442a12e9d48fe1a705f55a1adfc4.sdkstatcache -output-file-map /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/Observation.build/Debug/Observation-t.build/Objects-normal/arm64/Observation-OutputFileMap.json -save-temps -color-diagnostics -explicit-module-build -module-cache-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/SwiftExplicitPrecompiledModules -clang-scanner-module-cache-path /Users/admin/builder/spi-builder-workspace/.build/out/ModuleCache.noindex -sdk-module-cache-path /Users/admin/builder/spi-builder-workspace/.build/out/SDKExplicitPrecompiledModules -emit-dependencies -emit-module -emit-module-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/Observation.build/Debug/Observation-t.build/Objects-normal/arm64/Observation.swiftmodule -serialize-diagnostics -dependency-scan-serialize-diagnostics-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/Observation.build/Debug/Observation-t.build/Objects-normal/arm64/Observation-dependency-scan.dia -validate-clang-modules-once -clang-build-session-file /Users/admin/builder/spi-builder-workspace/.build/out/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/.build/out/Intermediates.noindex/Observation.build/Debug/Observation-t.build/Objects-normal/arm64/Observation_const_extract_protocols.json -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/Observation.build/Debug/Observation-t.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/Observation.build/Debug/Observation-t.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/Observation.build/Debug/Observation-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -emit-objc-header -emit-objc-header-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/Observation.build/Debug/Observation-t.build/Objects-normal/arm64/Observation-Swift.h -working-directory /Users/admin/builder -experimental-emit-module-separately -disable-cmo
error: Build failed
BUILD FAILURE 6.4 macosSpm