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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 CRuntime with Swift 5.9 for macOS (SPM).

Build Command

env DEVELOPER_DIR=/Applications/Xcode-15.2.0-Beta.app xcrun swift build --arch arm64

Build Log

========================================
RunAll
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Builder version: 4.28.6
Interrupt handler set up.
========================================
Checkout
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Clone URL: https://github.com/nerdsupremacist/CRuntime.git
Reference: master
Initialized empty Git repository in /Users/builder/builds/TDmZkXJm/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/.git/
From https://github.com/nerdsupremacist/CRuntime
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 1ad0c05 using memset
Cloned https://github.com/nerdsupremacist/CRuntime.git
Revision (git rev-parse @):
1ad0c05e0d2bc83546df2c7883eb33dbc3678d4c
SUCCESS checkout https://github.com/nerdsupremacist/CRuntime.git at master
========================================
ResolveProductDependencies
========================================
Resolving dependencies ...
{
  "identity": ".resolve-product-dependencies",
  "name": "resolve-dependencies",
  "url": "/Users/builder/builds/TDmZkXJm/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/.resolve-product-dependencies",
  "version": "unspecified",
  "path": "/Users/builder/builds/TDmZkXJm/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/.resolve-product-dependencies",
  "dependencies": [
    {
      "identity": "cruntime",
      "name": "CRuntime",
      "url": "https://github.com/nerdsupremacist/CRuntime.git",
      "version": "unspecified",
      "path": "/Users/builder/builds/TDmZkXJm/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/CRuntime",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/nerdsupremacist/CRuntime.git from cache
Fetched https://github.com/nerdsupremacist/CRuntime.git (0.62s)
Creating working copy for https://github.com/nerdsupremacist/CRuntime.git
Working copy of https://github.com/nerdsupremacist/CRuntime.git resolved at master
warning: '.resolve-product-dependencies': dependency 'cruntime' is not used by any target
Found 0 product dependencies
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             5.9
Building package at path:  $PWD/checkout
https://github.com/nerdsupremacist/CRuntime.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-15.2.0-Beta.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 5.9 macosSpm