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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 Aespa with Swift 5.10 for macOS (SPM).

Build Command

env DEVELOPER_DIR=/Applications/Xcode-15.3.0.app xcrun swift build --arch arm64

Build Log

========================================
RunAll
========================================
Builder version: 4.40.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/enebin/Aespa.git
Reference: main
Initialized empty Git repository in /Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/.git/
From https://github.com/enebin/Aespa
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 66a9fac Merge pull request #44 from enebin/release/0.5.3
Cloned https://github.com/enebin/Aespa.git
Revision (git rev-parse @):
66a9face7d4ab96f184650b0e006bcd8bce8f4c2
SUCCESS checkout https://github.com/enebin/Aespa.git at main
========================================
ResolveProductDependencies
========================================
Resolving dependencies ...
{
  "identity": ".resolve-product-dependencies",
  "name": "resolve-dependencies",
  "url": "/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/.resolve-product-dependencies",
  "version": "unspecified",
  "path": "/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/.resolve-product-dependencies",
  "dependencies": [
    {
      "identity": "aespa",
      "name": "Aespa",
      "url": "https://github.com/enebin/Aespa.git",
      "version": "unspecified",
      "path": "/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Aespa",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/enebin/Aespa.git from cache
Fetched https://github.com/enebin/Aespa.git from cache (0.32s)
Creating working copy for https://github.com/enebin/Aespa.git
Working copy of https://github.com/enebin/Aespa.git resolved at main (66a9fac)
warning: '.resolve-product-dependencies': dependency 'aespa' is not used by any target
Found 0 product dependencies
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             5.10
Building package at path:  $workDir
https://github.com/enebin/Aespa.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-15.3.0.app xcrun swift build --arch arm64
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-6044DDE57671499D.txt
Foundation/JSONDecoder.swift:1180: Fatal error: 'try!' expression unexpectedly raised an error: Foundation.JSONError.unescapedControlCharacterInString(ascii: 16, location: Foundation.JSONError.SourceLocation(line: 119, column: 130, index: 18075))
BUILD FAILURE 5.10 macosSpm