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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 iOS using Xcode 15.4 on 30 Apr 2025 11:33:27 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:         iOS
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/apple/swift-log.git
Fetching from https://github.com/apple/swift-nio.git
Fetching from https://github.com/apple/swift-protobuf.git
Fetching from https://github.com/apple/swift-system.git
Fetching from https://github.com/johnfairh/SourceMapper.git
Fetching from https://github.com/apple/swift-collections.git
Fetching from https://github.com/johnfairh/Semver.swift.git
Fetching from https://github.com/apple/swift-atomics.git
Creating working copy of package ‘SourceMapper’
Checking out 2.0.0 of package ‘SourceMapper’
Creating working copy of package ‘swift’
Checking out 1.2.4 of package ‘swift’
Creating working copy of package ‘swift-collections’
Checking out 1.1.4 of package ‘swift-collections’
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-protobuf’
Checking out 1.28.2 of package ‘swift-protobuf’
Creating working copy of package ‘swift-nio’
Checking out 2.81.0 of package ‘swift-nio’
Creating working copy of package ‘swift-atomics’
Checking out 1.2.0 of package ‘swift-atomics’
Resolved source packages:
  swift-atomics: https://github.com/apple/swift-atomics.git @ 1.2.0
  swift-collections: https://github.com/apple/swift-collections.git @ 1.1.4
  SourceMapper: https://github.com/johnfairh/SourceMapper.git @ 2.0.0
  swift-nio: https://github.com/apple/swift-nio.git @ 2.81.0
  swift-log: https://github.com/apple/swift-log.git @ 1.6.2
  SwiftProtobuf: https://github.com/apple/swift-protobuf.git @ 1.28.2
  swift-system: https://github.com/apple/swift-system.git @ 1.4.0
  Semver: https://github.com/johnfairh/Semver.swift.git @ 1.2.4
resolved source packages: swift-atomics, swift-collections, SourceMapper, swift-nio, swift-log, SwiftProtobuf, swift-system, Semver
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
  SwiftProtobuf: https://github.com/apple/swift-protobuf.git @ 1.28.2
  Semver: https://github.com/johnfairh/Semver.swift.git @ 1.2.4
  swift-collections: https://github.com/apple/swift-collections.git @ 1.1.4
  swift-atomics: https://github.com/apple/swift-atomics.git @ 1.2.0
  SourceMapper: https://github.com/johnfairh/SourceMapper.git @ 2.0.0
  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-nio, SwiftProtobuf, Semver, swift-collections, swift-atomics, SourceMapper, 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
BUILD FAILURE 5.10 iOS