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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 Stubber, reference master (9f1833), with Swift 6.0 for macOS (SPM) on 31 Oct 2024 18:48:50 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/devxoul/Stubber.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/devxoul/Stubber
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 9f18335 Bump version to 1.5.3
Cloned https://github.com/devxoul/Stubber.git
Revision (git rev-parse @):
9f1833587f2ec1b590e0047b00ab11c85d3ae57b
SUCCESS checkout https://github.com/devxoul/Stubber.git at master
========================================
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": "stubber",
      "name": "Stubber",
      "url": "https://github.com/devxoul/Stubber.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Stubber",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/devxoul/Stubber.git
[1/303] Fetching stubber
Fetched https://github.com/devxoul/Stubber.git from cache (1.44s)
Creating working copy for https://github.com/devxoul/Stubber.git
Working copy of https://github.com/devxoul/Stubber.git resolved at master (9f18335)
warning: '.resolve-product-dependencies': dependency 'stubber' 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/devxoul/Stubber.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
[3/6] Compiling Stubber Escaping.Arguments.swift
[4/6] Compiling Stubber Stubber.swift
/Users/admin/builder/spi-builder-workspace/Sources/Stubber/Stubber.swift:11:13: warning: let 'store' is not concurrency-safe because non-'Sendable' type 'Store' may have shared mutable state; this is an error in the Swift 6 language mode
  4 | private typealias Function = Any
  5 |
  6 | private final class Store {
    |                     `- note: class 'Store' does not conform to the 'Sendable' protocol
  7 |   var stubs: [FunctionAddress: Function] = [:]
  8 |   var executions: [FunctionAddress: [AnyExecution]] = [:]
  9 | }
 10 |
 11 | private let store = Store()
    |             |- warning: let 'store' is not concurrency-safe because non-'Sendable' type 'Store' may have shared mutable state; this is an error in the Swift 6 language mode
    |             |- note: annotate 'store' 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
 12 | private let lock = NSLock()
 13 |
[5/6] Compiling Stubber Execution.swift
[6/6] Emitting module Stubber
/Users/admin/builder/spi-builder-workspace/Sources/Stubber/Stubber.swift:11:13: warning: let 'store' is not concurrency-safe because non-'Sendable' type 'Store' may have shared mutable state; this is an error in the Swift 6 language mode
  4 | private typealias Function = Any
  5 |
  6 | private final class Store {
    |                     `- note: class 'Store' does not conform to the 'Sendable' protocol
  7 |   var stubs: [FunctionAddress: Function] = [:]
  8 |   var executions: [FunctionAddress: [AnyExecution]] = [:]
  9 | }
 10 |
 11 | private let store = Store()
    |             |- warning: let 'store' is not concurrency-safe because non-'Sendable' type 'Store' may have shared mutable state; this is an error in the Swift 6 language mode
    |             |- note: annotate 'store' 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
 12 | private let lock = NSLock()
 13 |
Build complete! (6.31s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Stubber",
  "name" : "Stubber",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.10"
    },
    {
      "name" : "ios",
      "version" : "8.0"
    },
    {
      "name" : "tvos",
      "version" : "9.0"
    },
    {
      "name" : "watchos",
      "version" : "2.0"
    }
  ],
  "products" : [
    {
      "name" : "Stubber",
      "targets" : [
        "Stubber"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "5"
  ],
  "targets" : [
    {
      "c99name" : "StubberTests",
      "module_type" : "SwiftTarget",
      "name" : "StubberTests",
      "path" : "Tests/StubberTests",
      "sources" : [
        "StubberTests.swift",
        "Stubs.swift"
      ],
      "target_dependencies" : [
        "Stubber"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Stubber",
      "module_type" : "SwiftTarget",
      "name" : "Stubber",
      "path" : "Sources/Stubber",
      "product_memberships" : [
        "Stubber"
      ],
      "sources" : [
        "Escaping.Arguments.swift",
        "Execution.swift",
        "Stubber.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Done.