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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 jemalloc 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/ordo-one/package-jemalloc.git
Reference: 1.0.0
Initialized empty Git repository in /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.git/
From https://github.com/ordo-one/package-jemalloc
 * tag               1.0.0      -> FETCH_HEAD
HEAD is now at e8a5db0 Fix documentation
Cloned https://github.com/ordo-one/package-jemalloc.git
Revision (git rev-parse @):
e8a5db026963f5bfeac842d9d3f2cc8cde323b49
SUCCESS checkout https://github.com/ordo-one/package-jemalloc.git at 1.0.0
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Build
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Selected platform:         macosSpm
Swift version:             5.10
Building package at path:  $workDir
https://github.com/ordo-one/package-jemalloc.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-15.3.0-Beta.2.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`.
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