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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 CRuby, reference v2.1.0 (6cdfc7), with Swift 5.10 for macOS (SPM) on 11 Dec 2024 04:16:22 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-15.4.0.app xcrun swift build --arch arm64

Build Log

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RunAll
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Builder version: 4.58.5
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/johnfairh/CRuby.git
Reference: v2.1.0
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/johnfairh/CRuby
 * tag               v2.1.0     -> FETCH_HEAD
HEAD is now at 6cdfc7d Release 2.1.0
Cloned https://github.com/johnfairh/CRuby.git
Revision (git rev-parse @):
6cdfc7db30f8fc7a27199a1b6b829e42e67bb5c7
SUCCESS checkout https://github.com/johnfairh/CRuby.git at v2.1.0
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Build
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Selected platform:         macosSpm
Swift version:             5.10
Building package at path:  $PWD
https://github.com/johnfairh/CRuby.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-15.4.0.app xcrun swift build --arch arm64
error: The package does not contain a buildable target.
Add at least one `.target` or `.executableTarget` to your `Package.swift`.
BUILD FAILURE 5.10 macosSpm