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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 NavigationBackport, reference main (91ed75), with Swift 6.1 for macOS (SPM) on 30 Apr 2025 03:36:38 UTC.

Swift 6 data race errors: 2

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: 4.61.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/johnpatrickmorgan/NavigationBackport.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/johnpatrickmorgan/NavigationBackport
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 91ed751 Adds availability annotation for all platforms
Cloned https://github.com/johnpatrickmorgan/NavigationBackport.git
Revision (git rev-parse @):
91ed75126f8d7e72eb56842794e80580343e2d4f
SUCCESS checkout https://github.com/johnpatrickmorgan/NavigationBackport.git at main
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/johnpatrickmorgan/NavigationBackport.git
https://github.com/johnpatrickmorgan/NavigationBackport.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "NavigationBackport",
  "name" : "NavigationBackport",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "14.0"
    },
    {
      "name" : "watchos",
      "version" : "7.0"
    },
    {
      "name" : "macos",
      "version" : "11.0"
    },
    {
      "name" : "tvos",
      "version" : "14.0"
    }
  ],
  "products" : [
    {
      "name" : "NavigationBackport",
      "targets" : [
        "NavigationBackport"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "NavigationBackportTests",
      "module_type" : "SwiftTarget",
      "name" : "NavigationBackportTests",
      "path" : "Tests/NavigationBackportTests",
      "sources" : [
        "NavigationBackportTests.swift"
      ],
      "target_dependencies" : [
        "NavigationBackport"
      ],
      "type" : "test"
    },
    {
      "c99name" : "NavigationBackport",
      "module_type" : "SwiftTarget",
      "name" : "NavigationBackport",
      "path" : "Sources/NavigationBackport",
      "product_memberships" : [
        "NavigationBackport"
      ],
      "sources" : [
        "Array+utilities.swift",
        "Binding+withDelaysIfUnsupported.swift",
        "CodableRepresentation.swift",
        "ConditionalViewBuilder.swift",
        "DestinationBuilderHolder.swift",
        "DestinationBuilderModifier.swift",
        "DestinationBuilderView.swift",
        "EnvironmentValues+navigationStack.swift",
        "LocalDestinationBuilderModifier.swift",
        "NBNavigationLink.swift",
        "NBNavigationPath+utilities.swift",
        "NBNavigationPath.swift",
        "NBNavigationStack.swift",
        "NBScreen.swift",
        "NavigationBackport.swift",
        "NavigationLinkRowStyle.swift",
        "NavigationPathHolder.swift",
        "Navigator+utilities.swift",
        "Navigator+withDelaysIfUnsupported.swift",
        "Navigator.swift",
        "Node.swift",
        "NonReactiveState.swift",
        "ObservableObject+withDelaysIfUnsupported.swift",
        "Router.swift",
        "Unobserved.swift",
        "UseNavigationStackPolicy.swift",
        "View+_navigationDestination.swift",
        "View+nbNavigationDestination.swift",
        "View+nbUseNavigationStack.swift",
        "View+onFirstAppear.swift",
        "apply.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.6"
}
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
[3/31] Emitting module NavigationBackport
/Users/admin/builder/spi-builder-workspace/Sources/NavigationBackport/DestinationBuilderView.swift:16:15: warning: main actor-isolated operator function '==' cannot be used to satisfy nonisolated requirement from protocol 'Equatable'; this is an error in the Swift 6 language mode
13 | }
14 |
15 | struct DataDependentView<Content: View>: View, Equatable {
   |                                                `- note: add '@preconcurrency' to the 'Equatable' conformance to defer isolation checking to run time
16 |   static func ==(lhs: DataDependentView, rhs: DataDependentView) -> Bool {
   |               |- warning: main actor-isolated operator function '==' cannot be used to satisfy nonisolated requirement from protocol 'Equatable'; this is an error in the Swift 6 language mode
   |               `- note: add 'nonisolated' to '==' to make this operator function not isolated to the actor
17 |     return lhs.data == rhs.data
18 |   }
/Users/admin/builder/spi-builder-workspace/Sources/NavigationBackport/EnvironmentValues+navigationStack.swift:4:14: warning: static property 'defaultValue' is not concurrency-safe because non-'Sendable' type 'UseNavigationStackPolicy' may have shared mutable state; this is an error in the Swift 6 language mode
 2 |
 3 | struct UseNavigationStackPolicyKey: EnvironmentKey {
 4 |   static let defaultValue = UseNavigationStackPolicy.whenAvailable
   |              |- warning: static property 'defaultValue' is not concurrency-safe because non-'Sendable' type 'UseNavigationStackPolicy' may have shared mutable state; this is an error in the Swift 6 language mode
   |              |- note: add '@MainActor' to make static property 'defaultValue' part of global actor 'MainActor'
   |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 5 | }
 6 |
/Users/admin/builder/spi-builder-workspace/Sources/NavigationBackport/UseNavigationStackPolicy.swift:3:13: note: consider making enum 'UseNavigationStackPolicy' conform to the 'Sendable' protocol
1 | import SwiftUI
2 |
3 | public enum UseNavigationStackPolicy {
  |             `- note: consider making enum 'UseNavigationStackPolicy' conform to the 'Sendable' protocol
4 |   case whenAvailable
5 |   case never
[4/34] Compiling NavigationBackport View+nbUseNavigationStack.swift
[5/34] Compiling NavigationBackport View+onFirstAppear.swift
[6/34] Compiling NavigationBackport apply.swift
[7/34] Compiling NavigationBackport Navigator.swift
[8/34] Compiling NavigationBackport Node.swift
[9/34] Compiling NavigationBackport NonReactiveState.swift
[10/34] Compiling NavigationBackport Array+utilities.swift
[11/34] Compiling NavigationBackport Binding+withDelaysIfUnsupported.swift
[12/34] Compiling NavigationBackport CodableRepresentation.swift
[13/34] Compiling NavigationBackport ConditionalViewBuilder.swift
[14/34] Compiling NavigationBackport NBScreen.swift
[15/34] Compiling NavigationBackport NavigationBackport.swift
[16/34] Compiling NavigationBackport NavigationLinkRowStyle.swift
[17/34] Compiling NavigationBackport UseNavigationStackPolicy.swift
[18/34] Compiling NavigationBackport View+_navigationDestination.swift
[19/34] Compiling NavigationBackport View+nbNavigationDestination.swift
[20/34] Compiling NavigationBackport DestinationBuilderHolder.swift
/Users/admin/builder/spi-builder-workspace/Sources/NavigationBackport/DestinationBuilderView.swift:16:15: warning: main actor-isolated operator function '==' cannot be used to satisfy nonisolated requirement from protocol 'Equatable'; this is an error in the Swift 6 language mode
13 | }
14 |
15 | struct DataDependentView<Content: View>: View, Equatable {
   |                                                `- note: add '@preconcurrency' to the 'Equatable' conformance to defer isolation checking to run time
16 |   static func ==(lhs: DataDependentView, rhs: DataDependentView) -> Bool {
   |               |- warning: main actor-isolated operator function '==' cannot be used to satisfy nonisolated requirement from protocol 'Equatable'; this is an error in the Swift 6 language mode
   |               `- note: add 'nonisolated' to '==' to make this operator function not isolated to the actor
17 |     return lhs.data == rhs.data
18 |   }
[21/34] Compiling NavigationBackport DestinationBuilderModifier.swift
/Users/admin/builder/spi-builder-workspace/Sources/NavigationBackport/DestinationBuilderView.swift:16:15: warning: main actor-isolated operator function '==' cannot be used to satisfy nonisolated requirement from protocol 'Equatable'; this is an error in the Swift 6 language mode
13 | }
14 |
15 | struct DataDependentView<Content: View>: View, Equatable {
   |                                                `- note: add '@preconcurrency' to the 'Equatable' conformance to defer isolation checking to run time
16 |   static func ==(lhs: DataDependentView, rhs: DataDependentView) -> Bool {
   |               |- warning: main actor-isolated operator function '==' cannot be used to satisfy nonisolated requirement from protocol 'Equatable'; this is an error in the Swift 6 language mode
   |               `- note: add 'nonisolated' to '==' to make this operator function not isolated to the actor
17 |     return lhs.data == rhs.data
18 |   }
[22/34] Compiling NavigationBackport DestinationBuilderView.swift
/Users/admin/builder/spi-builder-workspace/Sources/NavigationBackport/DestinationBuilderView.swift:16:15: warning: main actor-isolated operator function '==' cannot be used to satisfy nonisolated requirement from protocol 'Equatable'; this is an error in the Swift 6 language mode
13 | }
14 |
15 | struct DataDependentView<Content: View>: View, Equatable {
   |                                                `- note: add '@preconcurrency' to the 'Equatable' conformance to defer isolation checking to run time
16 |   static func ==(lhs: DataDependentView, rhs: DataDependentView) -> Bool {
   |               |- warning: main actor-isolated operator function '==' cannot be used to satisfy nonisolated requirement from protocol 'Equatable'; this is an error in the Swift 6 language mode
   |               `- note: add 'nonisolated' to '==' to make this operator function not isolated to the actor
17 |     return lhs.data == rhs.data
18 |   }
[23/34] Compiling NavigationBackport ObservableObject+withDelaysIfUnsupported.swift
[24/34] Compiling NavigationBackport Router.swift
[25/34] Compiling NavigationBackport Unobserved.swift
[26/34] Compiling NavigationBackport EnvironmentValues+navigationStack.swift
/Users/admin/builder/spi-builder-workspace/Sources/NavigationBackport/EnvironmentValues+navigationStack.swift:4:14: warning: static property 'defaultValue' is not concurrency-safe because non-'Sendable' type 'UseNavigationStackPolicy' may have shared mutable state; this is an error in the Swift 6 language mode
 2 |
 3 | struct UseNavigationStackPolicyKey: EnvironmentKey {
 4 |   static let defaultValue = UseNavigationStackPolicy.whenAvailable
   |              |- warning: static property 'defaultValue' is not concurrency-safe because non-'Sendable' type 'UseNavigationStackPolicy' may have shared mutable state; this is an error in the Swift 6 language mode
   |              |- note: add '@MainActor' to make static property 'defaultValue' part of global actor 'MainActor'
   |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 5 | }
 6 |
/Users/admin/builder/spi-builder-workspace/Sources/NavigationBackport/UseNavigationStackPolicy.swift:3:13: note: consider making enum 'UseNavigationStackPolicy' conform to the 'Sendable' protocol
1 | import SwiftUI
2 |
3 | public enum UseNavigationStackPolicy {
  |             `- note: consider making enum 'UseNavigationStackPolicy' conform to the 'Sendable' protocol
4 |   case whenAvailable
5 |   case never
/Users/admin/builder/spi-builder-workspace/Sources/NavigationBackport/LocalDestinationBuilderModifier.swift:22:7: warning: sending 'destinationBuilder' risks causing data races; this is an error in the Swift 6 language mode
20 |     // the view tree. Dispatching async allows those re-renders to succeed before removing the local builder.
21 |     DispatchQueue.main.async { [destinationBuilder, id] in
22 |       destinationBuilder?.removeLocalBuilder(identifier: id)
   |       |- warning: sending 'destinationBuilder' risks causing data races; this is an error in the Swift 6 language mode
   |       `- note: task-isolated 'destinationBuilder' is captured by a main actor-isolated closure. main actor-isolated uses in closure may race against later nonisolated uses
23 |     }
24 |   }
[27/34] Compiling NavigationBackport LocalDestinationBuilderModifier.swift
/Users/admin/builder/spi-builder-workspace/Sources/NavigationBackport/EnvironmentValues+navigationStack.swift:4:14: warning: static property 'defaultValue' is not concurrency-safe because non-'Sendable' type 'UseNavigationStackPolicy' may have shared mutable state; this is an error in the Swift 6 language mode
 2 |
 3 | struct UseNavigationStackPolicyKey: EnvironmentKey {
 4 |   static let defaultValue = UseNavigationStackPolicy.whenAvailable
   |              |- warning: static property 'defaultValue' is not concurrency-safe because non-'Sendable' type 'UseNavigationStackPolicy' may have shared mutable state; this is an error in the Swift 6 language mode
   |              |- note: add '@MainActor' to make static property 'defaultValue' part of global actor 'MainActor'
   |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 5 | }
 6 |
/Users/admin/builder/spi-builder-workspace/Sources/NavigationBackport/UseNavigationStackPolicy.swift:3:13: note: consider making enum 'UseNavigationStackPolicy' conform to the 'Sendable' protocol
1 | import SwiftUI
2 |
3 | public enum UseNavigationStackPolicy {
  |             `- note: consider making enum 'UseNavigationStackPolicy' conform to the 'Sendable' protocol
4 |   case whenAvailable
5 |   case never
/Users/admin/builder/spi-builder-workspace/Sources/NavigationBackport/LocalDestinationBuilderModifier.swift:22:7: warning: sending 'destinationBuilder' risks causing data races; this is an error in the Swift 6 language mode
20 |     // the view tree. Dispatching async allows those re-renders to succeed before removing the local builder.
21 |     DispatchQueue.main.async { [destinationBuilder, id] in
22 |       destinationBuilder?.removeLocalBuilder(identifier: id)
   |       |- warning: sending 'destinationBuilder' risks causing data races; this is an error in the Swift 6 language mode
   |       `- note: task-isolated 'destinationBuilder' is captured by a main actor-isolated closure. main actor-isolated uses in closure may race against later nonisolated uses
23 |     }
24 |   }
[28/34] Compiling NavigationBackport NBNavigationLink.swift
/Users/admin/builder/spi-builder-workspace/Sources/NavigationBackport/EnvironmentValues+navigationStack.swift:4:14: warning: static property 'defaultValue' is not concurrency-safe because non-'Sendable' type 'UseNavigationStackPolicy' may have shared mutable state; this is an error in the Swift 6 language mode
 2 |
 3 | struct UseNavigationStackPolicyKey: EnvironmentKey {
 4 |   static let defaultValue = UseNavigationStackPolicy.whenAvailable
   |              |- warning: static property 'defaultValue' is not concurrency-safe because non-'Sendable' type 'UseNavigationStackPolicy' may have shared mutable state; this is an error in the Swift 6 language mode
   |              |- note: add '@MainActor' to make static property 'defaultValue' part of global actor 'MainActor'
   |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 5 | }
 6 |
/Users/admin/builder/spi-builder-workspace/Sources/NavigationBackport/UseNavigationStackPolicy.swift:3:13: note: consider making enum 'UseNavigationStackPolicy' conform to the 'Sendable' protocol
1 | import SwiftUI
2 |
3 | public enum UseNavigationStackPolicy {
  |             `- note: consider making enum 'UseNavigationStackPolicy' conform to the 'Sendable' protocol
4 |   case whenAvailable
5 |   case never
/Users/admin/builder/spi-builder-workspace/Sources/NavigationBackport/LocalDestinationBuilderModifier.swift:22:7: warning: sending 'destinationBuilder' risks causing data races; this is an error in the Swift 6 language mode
20 |     // the view tree. Dispatching async allows those re-renders to succeed before removing the local builder.
21 |     DispatchQueue.main.async { [destinationBuilder, id] in
22 |       destinationBuilder?.removeLocalBuilder(identifier: id)
   |       |- warning: sending 'destinationBuilder' risks causing data races; this is an error in the Swift 6 language mode
   |       `- note: task-isolated 'destinationBuilder' is captured by a main actor-isolated closure. main actor-isolated uses in closure may race against later nonisolated uses
23 |     }
24 |   }
[29/34] Compiling NavigationBackport NBNavigationPath+utilities.swift
[30/34] Compiling NavigationBackport NBNavigationPath.swift
[31/34] Compiling NavigationBackport NBNavigationStack.swift
[32/34] Compiling NavigationBackport NavigationPathHolder.swift
[33/34] Compiling NavigationBackport Navigator+utilities.swift
[34/34] Compiling NavigationBackport Navigator+withDelaysIfUnsupported.swift
Build complete! (10.52s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "NavigationBackport",
  "name" : "NavigationBackport",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "14.0"
    },
    {
      "name" : "watchos",
      "version" : "7.0"
    },
    {
      "name" : "macos",
      "version" : "11.0"
    },
    {
      "name" : "tvos",
      "version" : "14.0"
    }
  ],
  "products" : [
    {
      "name" : "NavigationBackport",
      "targets" : [
        "NavigationBackport"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "NavigationBackportTests",
      "module_type" : "SwiftTarget",
      "name" : "NavigationBackportTests",
      "path" : "Tests/NavigationBackportTests",
      "sources" : [
        "NavigationBackportTests.swift"
      ],
      "target_dependencies" : [
        "NavigationBackport"
      ],
      "type" : "test"
    },
    {
      "c99name" : "NavigationBackport",
      "module_type" : "SwiftTarget",
      "name" : "NavigationBackport",
      "path" : "Sources/NavigationBackport",
      "product_memberships" : [
        "NavigationBackport"
      ],
      "sources" : [
        "Array+utilities.swift",
        "Binding+withDelaysIfUnsupported.swift",
        "CodableRepresentation.swift",
        "ConditionalViewBuilder.swift",
        "DestinationBuilderHolder.swift",
        "DestinationBuilderModifier.swift",
        "DestinationBuilderView.swift",
        "EnvironmentValues+navigationStack.swift",
        "LocalDestinationBuilderModifier.swift",
        "NBNavigationLink.swift",
        "NBNavigationPath+utilities.swift",
        "NBNavigationPath.swift",
        "NBNavigationStack.swift",
        "NBScreen.swift",
        "NavigationBackport.swift",
        "NavigationLinkRowStyle.swift",
        "NavigationPathHolder.swift",
        "Navigator+utilities.swift",
        "Navigator+withDelaysIfUnsupported.swift",
        "Navigator.swift",
        "Node.swift",
        "NonReactiveState.swift",
        "ObservableObject+withDelaysIfUnsupported.swift",
        "Router.swift",
        "Unobserved.swift",
        "UseNavigationStackPolicy.swift",
        "View+_navigationDestination.swift",
        "View+nbNavigationDestination.swift",
        "View+nbUseNavigationStack.swift",
        "View+onFirstAppear.swift",
        "apply.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.6"
}
Done.