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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 Cgd, reference main (9cb9d5), with Swift 6.1 for macOS (SPM) on 28 Apr 2025 06:38:59 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/twostraws/Cgd.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/twostraws/Cgd
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 9cb9d56 Require Swift 5.0.
Cloned https://github.com/twostraws/Cgd.git
Revision (git rev-parse @):
9cb9d56e8fe9c893c4e2ab5011dee9b6a13234c4
SUCCESS checkout https://github.com/twostraws/Cgd.git at main
========================================
ResolveProductDependencies
========================================
Resolving dependencies ...
{
  "identity": ".resolve-product-dependencies",
  "name": "resolve-dependencies",
  "url": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "version": "unspecified",
  "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "dependencies": [
    {
      "identity": "cgd",
      "name": "Cgd",
      "url": "https://github.com/twostraws/Cgd.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Cgd",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/twostraws/Cgd.git
[1/20] Fetching cgd
Fetched https://github.com/twostraws/Cgd.git from cache (0.55s)
Creating working copy for https://github.com/twostraws/Cgd.git
Working copy of https://github.com/twostraws/Cgd.git resolved at main (9cb9d56)
warning: 'cgd': ignoring declared target(s) 'Cgd' in the system package
warning: 'cgd': system packages are deprecated; use system library targets instead
warning: '.resolve-product-dependencies': dependency 'cgd' is not used by any target
Found 0 product dependencies
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/twostraws/Cgd.git
https://github.com/twostraws/Cgd.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Cgd",
  "name" : "Cgd",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Cgd",
      "targets" : [
        "Cgd"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "Cgd",
      "module_type" : "SystemLibraryTarget",
      "name" : "Cgd",
      "path" : ".",
      "product_memberships" : [
        "Cgd"
      ],
      "sources" : [
      ],
      "type" : "system-target"
    }
  ],
  "tools_version" : "5.0"
}
warning: 'spi-builder-workspace': ignoring declared target(s) 'Cgd' in the system package
warning: 'spi-builder-workspace': system packages are deprecated; use system library targets instead
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures
warning: 'spi-builder-workspace': ignoring declared target(s) 'Cgd' in the system package
warning: 'spi-builder-workspace': system packages are deprecated; use system library targets instead
error: The package does not contain a buildable target.
Add at least one `.target` or `.executableTarget` to your `Package.swift`.
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64
warning: 'spi-builder-workspace': ignoring declared target(s) 'Cgd' in the system package
warning: 'spi-builder-workspace': system packages are deprecated; use system library targets instead
error: The package does not contain a buildable target.
Add at least one `.target` or `.executableTarget` to your `Package.swift`.
BUILD FAILURE 6.1 macosSpm