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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

Successful build of ReadyForSwift6Test, reference main (0969bd), with Swift 6.0 for macOS (SPM) on 4 Nov 2024 21:26:41 UTC.

Swift 6 data race errors: 1

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.1.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete

Build Log

========================================
RunAll
========================================
Builder version: 4.56.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/SwiftPackageIndex/ReadyForSwift6Test.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/SwiftPackageIndex/ReadyForSwift6Test
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 0969bd4 Update readme with language mode build command
Cloned https://github.com/SwiftPackageIndex/ReadyForSwift6Test.git
Revision (git rev-parse @):
0969bd4f78bb942d96b8ca1df466f296a67c808a
SUCCESS checkout https://github.com/SwiftPackageIndex/ReadyForSwift6Test.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": "readyforswift6test",
      "name": "ReadyForSwift6Test",
      "url": "https://github.com/SwiftPackageIndex/ReadyForSwift6Test.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/ReadyForSwift6Test",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/SwiftPackageIndex/ReadyForSwift6Test.git
[1/26] Fetching readyforswift6test
Fetched https://github.com/SwiftPackageIndex/ReadyForSwift6Test.git from cache (0.58s)
Creating working copy for https://github.com/SwiftPackageIndex/ReadyForSwift6Test.git
Working copy of https://github.com/SwiftPackageIndex/ReadyForSwift6Test.git resolved at main (0969bd4)
warning: '.resolve-product-dependencies': dependency 'readyforswift6test' is not used by any target
Found 0 product dependencies
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $PWD
https://github.com/SwiftPackageIndex/ReadyForSwift6Test.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.1.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version--7754E27361AE5C74.txt
[3/4] Emitting module ReadyForSwift6Test
/Users/admin/builder/spi-builder-workspace/Sources/ReadyForSwift6Test/ReadyForSwift6Test.swift:1:5: warning: var 'global' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
1 | var global = 0
  |     |- warning: var 'global' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
  |     |- note: convert 'global' to a 'let' constant to make 'Sendable' shared state immutable
  |     |- note: annotate 'global' with '@MainActor' if property should only be accessed from the main actor
  |     `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
2 |
3 | func f() async {
[4/4] Compiling ReadyForSwift6Test ReadyForSwift6Test.swift
/Users/admin/builder/spi-builder-workspace/Sources/ReadyForSwift6Test/ReadyForSwift6Test.swift:1:5: warning: var 'global' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
1 | var global = 0
  |     |- warning: var 'global' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
  |     |- note: convert 'global' to a 'let' constant to make 'Sendable' shared state immutable
  |     |- note: annotate 'global' with '@MainActor' if property should only be accessed from the main actor
  |     `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
2 |
3 | func f() async {
Build complete! (1.57s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "ReadyForSwift6Test",
  "name" : "ReadyForSwift6Test",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "tvos",
      "version" : "13.0"
    },
    {
      "name" : "watchos",
      "version" : "6.0"
    }
  ],
  "products" : [
    {
      "name" : "ReadyForSwift6Test",
      "targets" : [
        "ReadyForSwift6Test"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ReadyForSwift6Test",
      "module_type" : "SwiftTarget",
      "name" : "ReadyForSwift6Test",
      "path" : "Sources/ReadyForSwift6Test",
      "product_memberships" : [
        "ReadyForSwift6Test"
      ],
      "sources" : [
        "ReadyForSwift6Test.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.10"
}
Done.