Swift Package Index

Build Information

Failed to build swiftui-matched-inline-title, reference main (a86cc6), with Swift 6.4 for macOS (SPM) on 17 Sep 2026 18:19:34 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/sebj/swiftui-matched-inline-title.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/sebj/swiftui-matched-inline-title
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at a86cc62 🚀 Initial commit
Cloned https://github.com/sebj/swiftui-matched-inline-title.git
Revision (git rev-parse @):
a86cc6266c20ea476046f8402065ef9875e31c2f
SUCCESS checkout https://github.com/sebj/swiftui-matched-inline-title.git at main
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.4
Building package at path:  $PWD
https://github.com/sebj/swiftui-matched-inline-title.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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[20 / 29] MatchedInlineTitle
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[92 / 101] MatchedInlineTitle
error: SwiftCompile normal arm64 /Users/admin/builder/spi-builder-workspace/Sources/MatchedInlineTitle/ScrollView+MatchedInlineTitle.swift failed with a nonzero exit code. Command line:     cd /Users/admin/builder
    builtin-SwiftPerFileCompile ScrollView+MatchedInlineTitle.swift
/Users/admin/builder/spi-builder-workspace/Sources/MatchedInlineTitle/ScrollView+MatchedInlineTitle.swift:20:18: error: 'navigationBarTitleDisplayMode' is unavailable in macOS
18 |             self
19 |                 .coordinateSpace(name: namespace)
20 |                 .navigationBarTitleDisplayMode(.inline)
   |                  `- error: 'navigationBarTitleDisplayMode' is unavailable in macOS
21 |         }
22 |     }
SwiftUI.View.navigationBarTitleDisplayMode:2:25: note: 'navigationBarTitleDisplayMode' has been explicitly marked unavailable here
1 | protocol View {
2 | nonisolated public func navigationBarTitleDisplayMode(_ displayMode: NavigationBarItem.TitleDisplayMode) -> some View
  |                         `- note: 'navigationBarTitleDisplayMode' has been explicitly marked unavailable here
3 |   }
4 |
/Users/admin/builder/spi-builder-workspace/Sources/MatchedInlineTitle/ScrollView+MatchedInlineTitle.swift:17:9: warning: conformance of underlying type of 'some View' to protocol 'View' may be isolated and cannot be passed to main actor-isolated context [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/isolated-conformances\IsolatedConformances]8;;\]
15 |     ///     method.
16 |     func matchedInlineTitle(in namespace: Namespace.ID) -> some View {
17 |         _MatchedTitleContainer {
   |         `- warning: conformance of underlying type of 'some View' to protocol 'View' may be isolated and cannot be passed to main actor-isolated context [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/isolated-conformances\IsolatedConformances]8;;\]
18 |             self
19 |                 .coordinateSpace(name: namespace)
/Users/admin/builder/spi-builder-workspace/Sources/MatchedInlineTitle/ScrollView+MatchedInlineTitle.swift:17:9: warning: call to main actor-isolated initializer 'init(_:)' in a synchronous nonisolated context [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/actor-isolated-call\ActorIsolatedCall]8;;\]
15 |     ///     method.
16 |     func matchedInlineTitle(in namespace: Namespace.ID) -> some View {
17 |         _MatchedTitleContainer {
   |         `- warning: call to main actor-isolated initializer 'init(_:)' in a synchronous nonisolated context [#]8;;https://docs.swift.org/compiler/documentation/diagnostics/actor-isolated-call\ActorIsolatedCall]8;;\]
18 |             self
19 |                 .coordinateSpace(name: namespace)
/Users/admin/builder/spi-builder-workspace/Sources/MatchedInlineTitle/Internal/_MatchedTitleContainer.swift:13:5: note: calls to initializer 'init(_:)' from outside of its actor context are implicitly asynchronous
11 |     private let content: () -> Content
12 |
13 |     init(@ViewBuilder _ content: @escaping () -> Content) {
   |     |- note: calls to initializer 'init(_:)' from outside of its actor context are implicitly asynchronous
   |     `- note: main actor isolation inferred from conformance to protocol 'View'
14 |         self.content = content
15 |     }
[#ActorIsolatedCall]: <https://docs.swift.org/compiler/documentation/diagnostics/actor-isolated-call>
[#IsolatedConformances]: <https://docs.swift.org/compiler/documentation/diagnostics/isolated-conformances>
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/MatchedInlineTitle/Internal/TextContent.swift /Users/admin/builder/spi-builder-workspace/Sources/MatchedInlineTitle/Internal/_MatchedTitleContainer.swift /Users/admin/builder/spi-builder-workspace/Sources/MatchedInlineTitle/Internal/_TitlePreferenceKey.swift /Users/admin/builder/spi-builder-workspace/Sources/MatchedInlineTitle/MatchedTitle.swift -primary-file /Users/admin/builder/spi-builder-workspace/Sources/MatchedInlineTitle/ScrollView+MatchedInlineTitle.swift -emit-dependencies-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/swiftui-matched-inline-title.build/Debug/MatchedInlineTitle-t.build/Objects-normal/arm64/ScrollView+MatchedInlineTitle.d -emit-const-values-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/swiftui-matched-inline-title.build/Debug/MatchedInlineTitle-t.build/Objects-normal/arm64/ScrollView+MatchedInlineTitle.swiftconstvalues -emit-reference-dependencies-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/swiftui-matched-inline-title.build/Debug/MatchedInlineTitle-t.build/Objects-normal/arm64/ScrollView+MatchedInlineTitle.swiftdeps -serialize-diagnostics-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/swiftui-matched-inline-title.build/Debug/MatchedInlineTitle-t.build/Objects-normal/arm64/ScrollView+MatchedInlineTitle.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/libPreviewsMacros.dylib\#/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server\#PreviewsMacros -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 -load-resolved-plugin /Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib/swift/host/plugins/libSwiftUIMacros.dylib\#/Applications/Xcode-27.0.0-Release.Candidate.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/bin/swift-plugin-server\#SwiftUIMacros -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/swiftui-matched-inline-title.build/Debug/MatchedInlineTitle-t.build/Objects-normal/arm64/MatchedInlineTitle-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/swiftui-matched-inline-title.build/Debug/MatchedInlineTitle-t.build/DerivedSources-normal/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/swiftui-matched-inline-title.build/Debug/MatchedInlineTitle-t.build/DerivedSources/arm64 -Xcc -I/Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/swiftui-matched-inline-title.build/Debug/MatchedInlineTitle-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name MatchedInlineTitle -const-gather-protocols-file /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/swiftui-matched-inline-title.build/Debug/MatchedInlineTitle-t.build/Objects-normal/arm64/MatchedInlineTitle_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/swiftui-matched-inline-title.build/Debug/MatchedInlineTitle-t.build/Objects-normal/arm64/ScrollView+MatchedInlineTitle.o -debug-module-path /Users/admin/builder/spi-builder-workspace/.build/out/Intermediates.noindex/swiftui-matched-inline-title.build/Debug/MatchedInlineTitle-t.build/Objects-normal/arm64/MatchedInlineTitle.swiftmodule -index-unit-output-path /swiftui-matched-inline-title.build/Debug/MatchedInlineTitle-t.build/Objects-normal/arm64/ScrollView+MatchedInlineTitle.o -index-store-path /Users/admin/builder/spi-builder-workspace/.build/out -index-system-modules
error: Build failed
BUILD FAILURE 6.4 macosSpm