Swift Package IndexBuild Information
Failed to build NotificationTask, reference main (1cd6db), with Swift 6.4 for macOS (SPM) on 22 Sep 2026 05:27:33 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/samsonjs/NotificationTask.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/samsonjs/NotificationTask
* branch main -> FETCH_HEAD
* [new branch] main -> origin/main
HEAD is now at 1cd6dba Update Readme.md
Cloned https://github.com/samsonjs/NotificationTask.git
Revision (git rev-parse @):
1cd6dba627af18867b84f597245a77cd1ec81ce3
SUCCESS checkout https://github.com/samsonjs/NotificationTask.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/samsonjs/NotificationTask.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]
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[56 / 65] NotificationTask
/Users/admin/builder/spi-builder-workspace/Sources/NotificationTask/NotificationTask.swift:3:49: [1;33mwarning: [1;39m'Notification' was declared with an unavailable 'Sendable' conformance in 'Foundation'; conforming here risks data races[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/unavailable-sendable-conformance\UnavailableSendableConformance]8;;\]
[0;36m1 |[0;0m public import Foundation
[0;36m2 |[0;0m
[0;36m3 |[0;0m extension Notification: @unchecked @retroactive Sendable {}
[0;36m|[0;0m `- [1;33mwarning: [1;39m'Notification' was declared with an unavailable 'Sendable' conformance in 'Foundation'; conforming here risks data races[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/unavailable-sendable-conformance\UnavailableSendableConformance]8;;\]
[0;36m4 |[0;0m
[0;36m5 |[0;0m /// Manages a task that observes notifications. The tasks's lifetime is tied to the lifetime of the `NotificationTask` instance, so you
Foundation.Notification:6:11: [1;39mnote: [1;39m'Notification' declares unavailable conformance to protocol 'Sendable' here[0;0m
[0;36m4 |[0;0m @available(watchOS, unavailable, introduced: 2.0)
[0;36m5 |[0;0m @available(*, unavailable)
[0;36m6 |[0;0m extension Notification : Sendable {
[0;36m|[0;0m `- [1;39mnote: [1;39m'Notification' declares unavailable conformance to protocol 'Sendable' here[0;0m
[0;36m7 |[0;0m }
[#UnavailableSendableConformance]: <https://docs.swift.org/compiler/documentation/diagnostics/unavailable-sendable-conformance>
error: SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/NotificationTask/NotificationTask.swift failed with a nonzero exit code. Command line: cd /Users/admin/builder
builtin-SwiftPerFileCompile NotificationTask.swift
/Users/admin/builder/spi-builder-workspace/Sources/NotificationTask/NotificationTask.swift:3:49: [1;33mwarning: [1;39m'Notification' was declared with an unavailable 'Sendable' conformance in 'Foundation'; conforming here risks data races[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/unavailable-sendable-conformance\UnavailableSendableConformance]8;;\]
[0;36m1 |[0;0m public import Foundation
[0;36m2 |[0;0m
[0;36m3 |[0;0m extension Notification: @unchecked @retroactive Sendable {}
[0;36m|[0;0m `- [1;33mwarning: [1;39m'Notification' was declared with an unavailable 'Sendable' conformance in 'Foundation'; conforming here risks data races[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/unavailable-sendable-conformance\UnavailableSendableConformance]8;;\]
[0;36m4 |[0;0m
[0;36m5 |[0;0m /// Manages a task that observes notifications. The tasks's lifetime is tied to the lifetime of the `NotificationTask` instance, so you
Foundation.Notification:6:11: [1;39mnote: [1;39m'Notification' declares unavailable conformance to protocol 'Sendable' here[0;0m
[0;36m4 |[0;0m @available(watchOS, unavailable, introduced: 2.0)
[0;36m5 |[0;0m @available(*, unavailable)
[0;36m6 |[0;0m extension Notification : Sendable {
[0;36m|[0;0m `- [1;39mnote: [1;39m'Notification' declares unavailable conformance to protocol 'Sendable' here[0;0m
[0;36m7 |[0;0m }
/Users/admin/builder/spi-builder-workspace/Sources/NotificationTask/NotificationTask.swift:46:23: [1;31merror: [1;39msending 'context' risks causing data races[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/region-isolation\RegionIsolation]8;;\::]8;;https://docs.swift.org/compiler/documentation/diagnostics/sending-risks-data-race\SendingRisksDataRace]8;;\]
[0;36m44 |[0;0m for await notification in center.notifications(named: name) {
[0;36m45 |[0;0m guard let context else { break }
[0;36m46 |[0;0m await block(context, notification)
[0;36m|[0;0m |- [1;31merror: [1;39msending 'context' risks causing data races[0;0m [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/region-isolation\RegionIsolation]8;;\::]8;;https://docs.swift.org/compiler/documentation/diagnostics/sending-risks-data-race\SendingRisksDataRace]8;;\]
[0;36m|[0;0m `- [1;39mnote: [1;39msending main actor-isolated 'context' to @concurrent callee risks causing data races between @concurrent and main actor-isolated uses[0;0m
[0;36m47 |[0;0m }
[0;36m48 |[0;0m }
[#RegionIsolation]: <https://docs.swift.org/compiler/documentation/diagnostics/region-isolation>
[#SendingRisksDataRace]: <https://docs.swift.org/compiler/documentation/diagnostics/sending-risks-data-race>
[#UnavailableSendableConformance]: <https://docs.swift.org/compiler/documentation/diagnostics/unavailable-sendable-conformance>
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/NotificationTask/NotificationTask.swift -emit-dependencies-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/NotificationTask.build/Debug/NotificationTask-t.build/Objects-normal/arm64/NotificationTask.d -emit-const-values-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/NotificationTask.build/Debug/NotificationTask-t.build/Objects-normal/arm64/NotificationTask.swiftconstvalues -emit-reference-dependencies-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/NotificationTask.build/Debug/NotificationTask-t.build/Objects-normal/arm64/NotificationTask.swiftdeps -serialize-diagnostics-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/NotificationTask.build/Debug/NotificationTask-t.build/Objects-normal/arm64/NotificationTask.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/libFoundationMacros.dylib\#/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server\#FoundationMacros -load-resolved-plugin /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins/libObservationMacros.dylib\#/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server\#ObservationMacros -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/NotificationTask.build/Debug/NotificationTask-t.build/Objects-normal/arm64/NotificationTask-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 6 -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/NotificationTask.build/Debug/NotificationTask-t.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/NotificationTask.build/Debug/NotificationTask-t.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/NotificationTask.build/Debug/NotificationTask-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name NotificationTask -package-name spi_builder_workspace -const-gather-protocols-file /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/NotificationTask.build/Debug/NotificationTask-t.build/Objects-normal/arm64/NotificationTask_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/NotificationTask.build/Debug/NotificationTask-t.build/Objects-normal/arm64/NotificationTask.o -debug-module-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/NotificationTask.build/Debug/NotificationTask-t.build/Objects-normal/arm64/NotificationTask.swiftmodule -index-unit-output-path /NotificationTask.build/Debug/NotificationTask-t.build/Objects-normal/arm64/NotificationTask.o -index-store-path /Users/admin/builder/spi-builder-workspace/.build/out -index-system-modules
error: Build failed
BUILD FAILURE 6.4 macosSpm