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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, reference 2.4.0 (faf8e5), with Swift 6.0 for macOS (SPM) on 4 Nov 2024 01:50:26 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.1.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete

Build Log

========================================
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/java_util.git
Reference: 2.4.0
Initialized empty Git repository in /Users/admin/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
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
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $PWD
https://github.com/PureSwift/java_util.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.1.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete
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: '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 6.0 macosSpm