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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 SquirrelCore with Swift 6.0 for macOS (SPM).

Build Command

env DEVELOPER_DIR=/Applications/Xcode-15.3.0.app xcrun --toolchain org.swift.600202405261a 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: 4.40.0
Interrupt handler set up.
========================================
Checkout
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Clone URL: https://github.com/Swift-Squirrel/Squirrel-Core.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/Swift-Squirrel/Squirrel-Core
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at b7a7c41 Custom representation type
Cloned https://github.com/Swift-Squirrel/Squirrel-Core.git
Revision (git rev-parse @):
b7a7c4128c5a1d4d18baa5cf0f3dc91793e5c620
SUCCESS checkout https://github.com/Swift-Squirrel/Squirrel-Core.git at master
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $workDir
https://github.com/Swift-Squirrel/Squirrel-Core.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-15.3.0.app xcrun --toolchain org.swift.600202405261a swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete
Fetching https://github.com/sharplet/Regex.git
[1/1254] Fetching regex
Fetched https://github.com/sharplet/Regex.git from cache (2.50s)
Computing version for https://github.com/sharplet/Regex.git
error: Dependencies could not be resolved because root depends on 'regex' 1.1.0..<2.0.0.
'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).
BUILD FAILURE 6.0 macosSpm
This is a staging environment. For live and up-to-date package information, visit swiftpackageindex.com.