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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 swift-sass, reference main (66d548), with Swift 5.10 for macOS (Xcode) using Xcode 15.4 on 30 Apr 2025 11:32:27 UTC.

Build Command

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

Build Log

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RunAll
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Builder version: 4.61.1
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/johnfairh/swift-sass.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/johnfairh/swift-sass
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 66d548f Update to Sass 1.87.0 (#45)
Submodule path 'sass': checked out 'a3ca9ed36f1aaf88a60b3f1f726691aec2a0ffa2'
Submodule 'sass' (https://github.com/sass/sass.git) registered for path 'sass'
Cloning into '/Users/admin/builder/spi-builder-workspace/sass'...
Cloned https://github.com/johnfairh/swift-sass.git
Revision (git rev-parse @):
66d548f15eb280f3228ac50d6ed17ba59e196b3c
SUCCESS checkout https://github.com/johnfairh/swift-sass.git at main
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Build
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Selected platform:         macosXcodebuild
Swift version:             5.10
Building package at path:  $PWD
https://github.com/johnfairh/swift-sass.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/johnfairh/Semver.swift.git
Fetching from https://github.com/apple/swift-log.git
Fetching from https://github.com/apple/swift-system.git
Fetching from https://github.com/apple/swift-atomics.git
Fetching from https://github.com/apple/swift-nio.git
Fetching from https://github.com/johnfairh/SourceMapper.git
Fetching from https://github.com/apple/swift-collections.git
Fetching from https://github.com/apple/swift-protobuf.git
Creating working copy of package ‘swift’
Checking out 1.2.4 of package ‘swift’
Creating working copy of package ‘swift-atomics’
Checking out 1.2.0 of package ‘swift-atomics’
Creating working copy of package ‘swift-nio’
Checking out 2.81.0 of package ‘swift-nio’
Creating working copy of package ‘swift-log’
Checking out 1.6.2 of package ‘swift-log’
Creating working copy of package ‘swift-system’
Checking out 1.4.0 of package ‘swift-system’
Creating working copy of package ‘swift-collections’
Checking out 1.1.4 of package ‘swift-collections’
Creating working copy of package ‘SourceMapper’
Checking out 2.0.0 of package ‘SourceMapper’
Creating working copy of package ‘swift-protobuf’
Checking out 1.28.2 of package ‘swift-protobuf’
Resolved source packages:
  swift-atomics: https://github.com/apple/swift-atomics.git @ 1.2.0
  Semver: https://github.com/johnfairh/Semver.swift.git @ 1.2.4
  SwiftProtobuf: https://github.com/apple/swift-protobuf.git @ 1.28.2
  SourceMapper: https://github.com/johnfairh/SourceMapper.git @ 2.0.0
  swift-collections: https://github.com/apple/swift-collections.git @ 1.1.4
  swift-nio: https://github.com/apple/swift-nio.git @ 2.81.0
  swift-system: https://github.com/apple/swift-system.git @ 1.4.0
  swift-log: https://github.com/apple/swift-log.git @ 1.6.2
resolved source packages: swift-atomics, Semver, SwiftProtobuf, SourceMapper, swift-collections, swift-nio, swift-system, swift-log
error: 'spi-builder-workspace': package 'spi-builder-workspace' is using Swift tools version 6.0.0 but the installed version is 5.10.0
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:
  swift-nio: https://github.com/apple/swift-nio.git @ 2.81.0
  swift-log: https://github.com/apple/swift-log.git @ 1.6.2
  swift-atomics: https://github.com/apple/swift-atomics.git @ 1.2.0
  Semver: https://github.com/johnfairh/Semver.swift.git @ 1.2.4
  swift-system: https://github.com/apple/swift-system.git @ 1.4.0
  SourceMapper: https://github.com/johnfairh/SourceMapper.git @ 2.0.0
  swift-collections: https://github.com/apple/swift-collections.git @ 1.1.4
  SwiftProtobuf: https://github.com/apple/swift-protobuf.git @ 1.28.2
resolved source packages: swift-nio, swift-log, swift-atomics, Semver, swift-system, SourceMapper, swift-collections, SwiftProtobuf
error: 'spi-builder-workspace': package 'spi-builder-workspace' is using Swift tools version 6.0.0 but the installed version is 5.10.0
error: fatalError
BUILD FAILURE 5.10 macosXcodebuild