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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 Cairo with Swift 6.0 for macOS (Xcode) using Xcode 16.0.

Build Command

Build command unavailable

Build Log

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RunAll
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Builder version: 4.56.0
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/pureswift/cairo.git
Reference: 1.2.3
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/pureswift/cairo
 * tag               1.2.3      -> FETCH_HEAD
HEAD is now at bc207ab Fixed for Swift 3.0.2 compatibility
Cloned https://github.com/pureswift/cairo.git
Revision (git rev-parse @):
bc207ab2e367fbafef51a47b85a7e1eb2821ce57
SUCCESS checkout https://github.com/pureswift/cairo.git at 1.2.3
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Build
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Selected platform:         macosXcodebuild
Swift version:             6.0
Building package at path:  $PWD
https://github.com/pureswift/cairo.git
Command line invocation:
    /Applications/Xcode-16.1.0.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
package 'spi-builder-workspace' is using Swift tools version 3.0.2 which is no longer supported; consider using '// swift-tools-version: 6.0' to specify the current tools version
Resolved source packages:
  spi-builder-workspace: (null)
Resolve Package Graph
package 'spi-builder-workspace' is using Swift tools version 3.0.2 which is no longer supported; consider using '// swift-tools-version: 6.0' to specify the current tools version
2024-10-31 07:34:55.691 xcodebuild[464:2583] Writing error result bundle to /var/folders/fs/0w3t9t1d28xc3bj0tgb8hcrw0000gn/T/ResultBundle_2024-31-10_07-34-0055.xcresult
xcodebuild: error: Could not resolve package dependencies:
  package 'spi-builder-workspace' is using Swift tools version 3.0.2 which is no longer supported; consider using '// swift-tools-version: 6.0' to specify the current tools version
GENERIC FAILURE 6.0 macosXcodebuild