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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 Puddles, reference main (8ccd78), with Swift 6.1 for macOS (SPM) on 27 Apr 2025 20:14:38 UTC.

Swift 6 data race errors: 1

Build Command

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

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/SwiftedMind/Puddles.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/SwiftedMind/Puddles
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 8ccd78d Merge pull request #24 from SwiftedMind/SwiftedMind-patch-2
Cloned https://github.com/SwiftedMind/Puddles.git
Revision (git rev-parse @):
8ccd78d72039e325623ca614361cca40460823de
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/SwiftedMind/Puddles.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": "puddles",
      "name": "Puddles",
      "url": "https://github.com/SwiftedMind/Puddles.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Puddles",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/SwiftedMind/Puddles.git
[1/13860] Fetching puddles
Fetched https://github.com/SwiftedMind/Puddles.git from cache (2.50s)
Creating working copy for https://github.com/SwiftedMind/Puddles.git
Working copy of https://github.com/SwiftedMind/Puddles.git resolved at main (8ccd78d)
warning: '.resolve-product-dependencies': dependency 'puddles' 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/SwiftedMind/Puddles.git
https://github.com/SwiftedMind/Puddles.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Puddles",
  "name" : "Puddles",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "15.0"
    },
    {
      "name" : "macos",
      "version" : "12.0"
    },
    {
      "name" : "watchos",
      "version" : "8.0"
    },
    {
      "name" : "tvos",
      "version" : "15.0"
    }
  ],
  "products" : [
    {
      "name" : "Puddles",
      "targets" : [
        "Puddles"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "Puddles",
      "module_type" : "SwiftTarget",
      "name" : "Puddles",
      "path" : "Sources/Puddles",
      "product_memberships" : [
        "Puddles"
      ],
      "sources" : [
        "Interface/Interface.swift",
        "Lifetime Helpers/OnFirstAppear.swift",
        "Preview Helpers/DebugError.swift",
        "Puddles.swift",
        "Router/NavigationRouter.swift",
        "StateHosting/StateHosting.swift",
        "StateHosting/StateObjectHosting.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.7"
}
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
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-2F0A5646E1D333AE.txt
[3/10] Compiling Puddles NavigationRouter.swift
[4/10] Compiling Puddles Puddles.swift
/Users/admin/builder/spi-builder-workspace/Sources/Puddles/Puddles.swift:27:22: warning: var 'logger' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
25 |
26 | // Internal logger for the framework.
27 | fileprivate(set) var logger: Logger = .init(OSLog.disabled)
   |                      |- warning: var 'logger' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                      |- note: convert 'logger' to a 'let' constant to make 'Sendable' shared state immutable
   |                      |- note: add '@MainActor' to make var 'logger' part of global actor 'MainActor'
   |                      `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
28 |
29 | /// A configuration object for the `Puddles` framework.
[5/10] Compiling Puddles StateObjectHosting.swift
[6/10] Compiling Puddles StateHosting.swift
[7/10] Compiling Puddles DebugError.swift
[8/10] Emitting module Puddles
/Users/admin/builder/spi-builder-workspace/Sources/Puddles/Puddles.swift:27:22: warning: var 'logger' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
25 |
26 | // Internal logger for the framework.
27 | fileprivate(set) var logger: Logger = .init(OSLog.disabled)
   |                      |- warning: var 'logger' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                      |- note: convert 'logger' to a 'let' constant to make 'Sendable' shared state immutable
   |                      |- note: add '@MainActor' to make var 'logger' part of global actor 'MainActor'
   |                      `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
28 |
29 | /// A configuration object for the `Puddles` framework.
[9/10] Compiling Puddles OnFirstAppear.swift
/Users/admin/builder/spi-builder-workspace/Sources/Puddles/Lifetime Helpers/OnFirstAppear.swift:61:45: warning: passing non-sendable parameter 'action' to function expecting a @Sendable closure
58 |     /// - Parameter perform: The action to perform. It is exactly called once at the very beginning of the view's lifetime.
59 |     /// - Returns: A view that triggers the given `action` before it appears for the first time.
60 |     @MainActor public func onFirstAppear(perform action: @escaping () -> Void) -> some View {
   |                                                  `- note: parameter 'action' is implicitly non-sendable
61 |         modifier(ViewLifetimeHelper(onInit: action))
   |                                             `- warning: passing non-sendable parameter 'action' to function expecting a @Sendable closure
62 |     }
63 | }
[10/10] Compiling Puddles Interface.swift
/Users/admin/builder/spi-builder-workspace/Sources/Puddles/Interface/Interface.swift:70:20: warning: passing non-sendable parameter 'value' to function expecting a @Sendable closure
65 |     @MainActor
66 |     public func binding<Value>(
67 |         _ value: @autoclosure @escaping () -> Value,
   |           `- note: parameter 'value' is implicitly non-sendable
68 |         to action: @escaping (_ newValue: Value) -> Action
69 |     ) -> Binding<Value> {
70 |         .init(get: value) { newValue in
   |                    `- warning: passing non-sendable parameter 'value' to function expecting a @Sendable closure
71 |             actionHandler(action(newValue))
72 |         }
Build complete! (8.41s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Puddles",
  "name" : "Puddles",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "15.0"
    },
    {
      "name" : "macos",
      "version" : "12.0"
    },
    {
      "name" : "watchos",
      "version" : "8.0"
    },
    {
      "name" : "tvos",
      "version" : "15.0"
    }
  ],
  "products" : [
    {
      "name" : "Puddles",
      "targets" : [
        "Puddles"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "Puddles",
      "module_type" : "SwiftTarget",
      "name" : "Puddles",
      "path" : "Sources/Puddles",
      "product_memberships" : [
        "Puddles"
      ],
      "sources" : [
        "Interface/Interface.swift",
        "Lifetime Helpers/OnFirstAppear.swift",
        "Preview Helpers/DebugError.swift",
        "Puddles.swift",
        "Router/NavigationRouter.swift",
        "StateHosting/StateHosting.swift",
        "StateHosting/StateObjectHosting.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.7"
}
Done.