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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 java_util 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

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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/PureSwift/java_util.git
Reference: 2.4.0
Initialized empty Git repository in /Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/.git/
From https://github.com/PureSwift/java_util
 * tag               2.4.0      -> FETCH_HEAD
HEAD is now at faf8e50 Swift 4.2/5
Cloned https://github.com/PureSwift/java_util.git
Revision (git rev-parse @):
faf8e50be4ee3059d4f6da6ba7f0ec7ba2bea7e9
SUCCESS checkout https://github.com/PureSwift/java_util.git at 2.4.0
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             5.10
Building package at path:  $workDir
https://github.com/PureSwift/java_util.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-15.3.0-Beta.2.app xcrun swift build --arch arm64
error: 'spi-builder-workspace': the Swift tools version specification is missing a label; consider inserting 'swift-tools-version:' between the comment marker and the version specifier
error: the Swift tools version specification is missing a label; consider inserting 'swift-tools-version:' between the comment marker and the version specifier
error: 'spi-builder-workspace': the Swift tools version specification is missing a label; consider inserting 'swift-tools-version:' between the comment marker and the version specifier
error: the Swift tools version specification is missing a label; consider inserting 'swift-tools-version:' between the comment marker and the version specifier
BUILD FAILURE 5.10 macosSpm