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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 SecurityKit 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: 4.55.0
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/DynamicKit/SecurityKit.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/DynamicKit/SecurityKit
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at daab2bf Merge pull request #3 from DynamicKit/development
Cloned https://github.com/DynamicKit/SecurityKit.git
Revision (git rev-parse @):
daab2bfee4c8be7ca05983a7e878cc1434c08a01
SUCCESS checkout https://github.com/DynamicKit/SecurityKit.git at master
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Build
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Selected platform:         macosXcodebuild
Swift version:             6.0
Building package at path:  $PWD
https://github.com/DynamicKit/SecurityKit.git
Command line invocation:
    /Applications/Xcode-16.0.0.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
resolved source packages:
error: target at '/Users/admin/builder/spi-builder-workspace/Source' contains mixed language source files; feature not supported
GENERIC FAILURE 6.0 macosXcodebuild