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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 SquirrelConfig with Swift 5.10 for macOS (SPM).

Build Command

env DEVELOPER_DIR=/Applications/Xcode-15.3.0-Beta.2.app xcrun swift build --arch arm64

Build Log

========================================
RunAll
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Builder version: 4.29.0
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/swift-squirrel/squirrelconfig.git
Reference: 0.1.1
Initialized empty Git repository in /Users/builder/builds/TDmZkXJm/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/.git/
From https://github.com/swift-squirrel/squirrelconfig
 * tag               0.1.1      -> FETCH_HEAD
HEAD is now at ce47f7e remove observer
Cloned https://github.com/swift-squirrel/squirrelconfig.git
Revision (git rev-parse @):
ce47f7e0637be352ff89d36d7cd996ac7e42502e
SUCCESS checkout https://github.com/swift-squirrel/squirrelconfig.git at 0.1.1
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             5.10
Building package at path:  $workDir
https://github.com/swift-squirrel/squirrelconfig.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-15.3.0-Beta.2.app xcrun swift build --arch arm64
Fetching https://github.com/kylef/PathKit.git from cache
Fetching https://github.com/jpsim/Yams.git from cache
Fetching https://github.com/Swift-Squirrel/Squirrel-Core.git from cache
Fetched https://github.com/jpsim/Yams.git from cache (0.43s)
Fetched https://github.com/Swift-Squirrel/Squirrel-Core.git from cache (0.43s)
Fetched https://github.com/kylef/PathKit.git from cache (0.43s)
Computing version for https://github.com/Swift-Squirrel/Squirrel-Core.git
Computed https://github.com/Swift-Squirrel/Squirrel-Core.git at 0.1.3 (0.55s)
Fetching https://github.com/sharplet/Regex.git from cache
Fetched https://github.com/sharplet/Regex.git from cache (0.22s)
Computing version for https://github.com/sharplet/Regex.git
error: Dependencies could not be resolved because root depends on 'squirrel-core' 0.1.2..<1.0.0.
'squirrel-core' >= 0.1.2 cannot be used.
'regex' < 2.0.0 cannot be used because no versions of 'regex' match the requirement 1.1.2..<2.0.0 and 'regex' < 1.1.2 contains incompatible tools version (3.1.0).
'squirrel-core' >= 0.1.2 practically depends on 'regex' 1.1.0..<2.0.0 because 'squirrel-core' 0.1.2 depends on 'regex' 1.1.0..<2.0.0 and 'squirrel-core' 0.1.3 depends on 'regex' 1.1.0..<2.0.0.
'squirrel-core' {0.1.2, 0.1.4..<1.0.0} practically depends on 'regex' 1.1.0..<2.0.0 because no versions of 'squirrel-core' match the requirement 0.1.4..<1.0.0 and 'squirrel-core' 0.1.2 depends on 'regex' 1.1.0..<2.0.0.
Updating https://github.com/kylef/PathKit.git
Updating https://github.com/Swift-Squirrel/Squirrel-Core.git
Updating https://github.com/jpsim/Yams.git
Updated https://github.com/kylef/PathKit.git (0.17s)
Updated https://github.com/Swift-Squirrel/Squirrel-Core.git (0.17s)
Updated https://github.com/jpsim/Yams.git (0.17s)
Computing version for https://github.com/Swift-Squirrel/Squirrel-Core.git
Computed https://github.com/Swift-Squirrel/Squirrel-Core.git at 0.1.3 (0.01s)
warning: 'regex': /Users/builder/builds/TDmZkXJm/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/.build/repositories/Regex-8914ffd2 is not valid git repository for 'https://github.com/sharplet/Regex.git', will fetch again.
Fetching https://github.com/sharplet/Regex.git from cache
Fetched https://github.com/sharplet/Regex.git from cache (0.15s)
Computing version for https://github.com/sharplet/Regex.git
error: Dependencies could not be resolved because root depends on 'squirrel-core' 0.1.2..<1.0.0.
'squirrel-core' >= 0.1.2 cannot be used.
'regex' < 2.0.0 cannot be used because no versions of 'regex' match the requirement 1.1.2..<2.0.0 and 'regex' < 1.1.2 contains incompatible tools version (3.1.0).
'squirrel-core' >= 0.1.2 practically depends on 'regex' 1.1.0..<2.0.0 because 'squirrel-core' 0.1.2 depends on 'regex' 1.1.0..<2.0.0 and 'squirrel-core' 0.1.3 depends on 'regex' 1.1.0..<2.0.0.
'squirrel-core' {0.1.2, 0.1.4..<1.0.0} practically depends on 'regex' 1.1.0..<2.0.0 because no versions of 'squirrel-core' match the requirement 0.1.4..<1.0.0 and 'squirrel-core' 0.1.2 depends on 'regex' 1.1.0..<2.0.0.
BUILD FAILURE 5.10 macosSpm