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Track the adoption of Swift 6 strict concurrency checks for data race safety. How many packages are Ready for Swift 6?

Build Information

Failed to build swiftui-showcase, reference main (0c2f4b), with Swift 5.10 for watchOS using Xcode 15.4 on 13 Mar 2025 22:50:21 UTC.

Build Command

No build command. This typically means the build failed at an early stage where we determine the build command.

Build Log

========================================
RunAll
========================================
Builder version: 4.60.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/ipedro/swiftui-showcase.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/ipedro/swiftui-showcase
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 0c2f4b9 tweak availability
Cloned https://github.com/ipedro/swiftui-showcase.git
Revision (git rev-parse @):
0c2f4b9297bb3b277d38e04ed9ade89dffac5440
SUCCESS checkout https://github.com/ipedro/swiftui-showcase.git at main
========================================
Build
========================================
Selected platform:         watchOS
Swift version:             5.10
Building package at path:  $PWD
https://github.com/ipedro/swiftui-showcase.git
Command line invocation:
    /Applications/Xcode-15.4.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
User defaults from command line:
    IDEClonedSourcePackagesDirPathOverride = /Users/admin/builder/spi-builder-workspace/.dependencies
    IDEPackageSupportUseBuiltinSCM = YES
Resolve Package Graph
Fetching from https://github.com/JohnSundell/Splash
Fetching from https://github.com/nathantannar4/Engine
Fetching from https://github.com/nicklockwood/SwiftFormat
Fetching from https://github.com/SimplyDanny/SwiftLintPlugins
Fetching from https://github.com/swiftlang/swift-syntax
Creating working copy of package ‘SwiftFormat’
Checking out 0.55.5 of package ‘SwiftFormat’
Creating working copy of package ‘SwiftLintPlugins’
Checking out 0.58.2 of package ‘SwiftLintPlugins’
Creating working copy of package ‘Splash’
Checking out 0.16.0 of package ‘Splash’
Creating working copy of package ‘swift-syntax’
Checking out 600.0.1 of package ‘swift-syntax’
Creating working copy of package ‘Engine’
Checking out 2.0.2 of package ‘Engine’
Resolved source packages:
  swiftui-showcase: /Users/admin/builder/spi-builder-workspace
  swift-syntax: https://github.com/swiftlang/swift-syntax @ 600.0.1
  SwiftLintPlugins: https://github.com/SimplyDanny/SwiftLintPlugins @ 0.58.2
  Engine: https://github.com/nathantannar4/Engine @ 2.0.2
  SwiftFormat: https://github.com/nicklockwood/SwiftFormat @ 0.55.5
  Splash: https://github.com/JohnSundell/Splash @ 0.16.0
resolved source packages: swiftui-showcase, swift-syntax, SwiftLintPlugins, Engine, SwiftFormat, Splash
error: 'spi-builder-workspace': Invalid manifest (compiled with: ["/Applications/Xcode-15.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc", "-vfsoverlay", "/var/folders/fs/0w3t9t1d28xc3bj0tgb8hcrw0000gn/T/TemporaryDirectory.JgDyxG/vfs.yaml", "-L", "/Applications/Xcode-15.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/pm/ManifestAPI", "-lPackageDescription", "-Xlinker", "-rpath", "-Xlinker", "/Applications/Xcode-15.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/pm/ManifestAPI", "-target", "arm64-apple-macosx13.0", "-sdk", "/Applications/Xcode-15.4.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.5.sdk", "-F", "/Applications/Xcode-15.4.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Frameworks", "-I", "/Applications/Xcode-15.4.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib", "-L", "/Applications/Xcode-15.4.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib", "-swift-version", "5", "-I", "/Applications/Xcode-15.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/pm/ManifestAPI", "-sdk", "/Applications/Xcode-15.4.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.5.sdk", "-package-description-version", "5.9.0", "/Users/admin/builder/spi-builder-workspace/Package.swift", "-Xfrontend", "-disable-implicit-concurrency-module-import", "-Xfrontend", "-disable-implicit-string-processing-module-import", "-o", "/var/folders/fs/0w3t9t1d28xc3bj0tgb8hcrw0000gn/T/TemporaryDirectory.t1T8KH/spi-builder-workspace-manifest"])
error: fatalError
/Users/admin/builder/spi-builder-workspace/Package.swift:5:56: error: cannot convert value of type 'String' to expected argument type 'String.Element' (aka 'Character')
let isDevelopment = !Context.packageDirectory.contains("/checkouts/")
                                                       ^
error: fatalError
Command line invocation:
    /Applications/Xcode-15.4.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
User defaults from command line:
    IDEClonedSourcePackagesDirPathOverride = /Users/admin/builder/spi-builder-workspace/.dependencies
    IDEPackageSupportUseBuiltinSCM = YES
Resolve Package Graph
Resolved source packages:
  SwiftFormat: https://github.com/nicklockwood/SwiftFormat @ 0.55.5
  SwiftLintPlugins: https://github.com/SimplyDanny/SwiftLintPlugins @ 0.58.2
  swift-syntax: https://github.com/swiftlang/swift-syntax @ 600.0.1
  swiftui-showcase: /Users/admin/builder/spi-builder-workspace
  Splash: https://github.com/JohnSundell/Splash @ 0.16.0
  Engine: https://github.com/nathantannar4/Engine @ 2.0.2
resolved source packages: SwiftFormat, SwiftLintPlugins, swift-syntax, swiftui-showcase, Splash, Engine
error: 'spi-builder-workspace': Invalid manifest (compiled with: ["/Applications/Xcode-15.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swiftc", "-vfsoverlay", "/var/folders/fs/0w3t9t1d28xc3bj0tgb8hcrw0000gn/T/TemporaryDirectory.k8cTcx/vfs.yaml", "-L", "/Applications/Xcode-15.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/pm/ManifestAPI", "-lPackageDescription", "-Xlinker", "-rpath", "-Xlinker", "/Applications/Xcode-15.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/pm/ManifestAPI", "-target", "arm64-apple-macosx13.0", "-sdk", "/Applications/Xcode-15.4.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.5.sdk", "-F", "/Applications/Xcode-15.4.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/Library/Frameworks", "-I", "/Applications/Xcode-15.4.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib", "-L", "/Applications/Xcode-15.4.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/usr/lib", "-swift-version", "5", "-I", "/Applications/Xcode-15.4.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/pm/ManifestAPI", "-sdk", "/Applications/Xcode-15.4.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.5.sdk", "-package-description-version", "5.9.0", "/Users/admin/builder/spi-builder-workspace/Package.swift", "-Xfrontend", "-disable-implicit-concurrency-module-import", "-Xfrontend", "-disable-implicit-string-processing-module-import", "-o", "/var/folders/fs/0w3t9t1d28xc3bj0tgb8hcrw0000gn/T/TemporaryDirectory.MT048v/spi-builder-workspace-manifest"])
error: fatalError
/Users/admin/builder/spi-builder-workspace/Package.swift:5:56: error: cannot convert value of type 'String' to expected argument type 'String.Element' (aka 'Character')
let isDevelopment = !Context.packageDirectory.contains("/checkouts/")
                                                       ^
error: fatalError
BUILD FAILURE 5.10 watchOS