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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 NeedleFoundation, reference v0.25.1 (69f7a8), with Swift 6.1 for macOS (SPM) on 30 Apr 2025 10:23:26 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/uber/needle.git
Reference: v0.25.1
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/uber/needle
 * tag               v0.25.1    -> FETCH_HEAD
HEAD is now at 69f7a88 Update generator binary and version file for v0.25.1
Cloned https://github.com/uber/needle.git
Revision (git rev-parse @):
69f7a889d2736f2621c6083ac29e0a75d158f249
SUCCESS checkout https://github.com/uber/needle.git at v0.25.1
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/uber/needle.git
https://github.com/uber/needle.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "NeedleFoundation",
  "name" : "NeedleFoundation",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "NeedleFoundation",
      "targets" : [
        "NeedleFoundation"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "NeedleFoundationTest",
      "targets" : [
        "NeedleFoundationTest"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "5"
  ],
  "targets" : [
    {
      "c99name" : "NeedleFoundationTests",
      "module_type" : "SwiftTarget",
      "name" : "NeedleFoundationTests",
      "path" : "Tests/NeedleFoundationTests",
      "sources" : [
        "ComponentTests.swift",
        "DependencyProviderRegistryTests.swift",
        "Pluginized/PluginizedComponentTests.swift"
      ],
      "target_dependencies" : [
        "NeedleFoundation"
      ],
      "type" : "test"
    },
    {
      "c99name" : "NeedleFoundationTestTests",
      "module_type" : "SwiftTarget",
      "name" : "NeedleFoundationTestTests",
      "path" : "Tests/NeedleFoundationTestTests",
      "sources" : [
        "MockComponentPathBuilderTests.swift"
      ],
      "target_dependencies" : [
        "NeedleFoundationTest"
      ],
      "type" : "test"
    },
    {
      "c99name" : "NeedleFoundationTest",
      "module_type" : "SwiftTarget",
      "name" : "NeedleFoundationTest",
      "path" : "Sources/NeedleFoundationTest",
      "product_memberships" : [
        "NeedleFoundationTest"
      ],
      "sources" : [
        "MockComponentPathBuilder.swift"
      ],
      "target_dependencies" : [
        "NeedleFoundation"
      ],
      "type" : "library"
    },
    {
      "c99name" : "NeedleFoundation",
      "module_type" : "SwiftTarget",
      "name" : "NeedleFoundation",
      "path" : "Sources/NeedleFoundation",
      "product_memberships" : [
        "NeedleFoundation",
        "NeedleFoundationTest"
      ],
      "sources" : [
        "Bootstrap.swift",
        "Component.swift",
        "Internal/DependencyProviderRegistry.swift",
        "Pluginized/Internal/PluginExtensionProviderRegistry.swift",
        "Pluginized/NonCoreComponent.swift",
        "Pluginized/PluginizedComponent.swift",
        "Pluginized/PluginizedScopeLifecycle.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.10"
}
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...
[0/3] Write sources
[2/3] Write swift-version-2F0A5646E1D333AE.txt
[4/11] Compiling NeedleFoundation NonCoreComponent.swift
[5/11] Compiling NeedleFoundation DependencyProviderRegistry.swift
/Users/admin/builder/spi-builder-workspace/Sources/NeedleFoundation/Internal/DependencyProviderRegistry.swift:32:23: warning: static property 'instance' is not concurrency-safe because non-'Sendable' type '__DependencyProviderRegistry' may have shared mutable state; this is an error in the Swift 6 language mode
 27 | // component subclasses that override the method to instantiate the
 28 | // dependency providers.
 29 | public class __DependencyProviderRegistry {
    |              `- note: class '__DependencyProviderRegistry' does not conform to the 'Sendable' protocol
 30 |
 31 |     /// The singleton instance.
 32 |     public static let instance = __DependencyProviderRegistry()
    |                       |- warning: static property 'instance' is not concurrency-safe because non-'Sendable' type '__DependencyProviderRegistry' may have shared mutable state; this is an error in the Swift 6 language mode
    |                       |- note: add '@MainActor' to make static property 'instance' part of global actor 'MainActor'
    |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 33 |
 34 |     /// Register the given factory closure with given key.
[6/11] Compiling NeedleFoundation Component.swift
[7/11] Compiling NeedleFoundation PluginizedComponent.swift
[8/11] Compiling NeedleFoundation PluginExtensionProviderRegistry.swift
/Users/admin/builder/spi-builder-workspace/Sources/NeedleFoundation/Pluginized/Internal/PluginExtensionProviderRegistry.swift:31:23: warning: static property 'instance' is not concurrency-safe because non-'Sendable' type '__PluginExtensionProviderRegistry' may have shared mutable state; this is an error in the Swift 6 language mode
26 | // all the pluginized component subclasses that override the method to
27 | // instantiate the dependency providers.
28 | public class __PluginExtensionProviderRegistry {
   |              `- note: class '__PluginExtensionProviderRegistry' does not conform to the 'Sendable' protocol
29 |
30 |     /// The singleton instance.
31 |     public static let instance = __PluginExtensionProviderRegistry()
   |                       |- warning: static property 'instance' is not concurrency-safe because non-'Sendable' type '__PluginExtensionProviderRegistry' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: add '@MainActor' to make static property 'instance' part of global actor 'MainActor'
   |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
32 |
33 |     /// Register the given factory closure with given key.
[9/11] Compiling NeedleFoundation Bootstrap.swift
[10/11] Compiling NeedleFoundation PluginizedScopeLifecycle.swift
[11/11] Emitting module NeedleFoundation
/Users/admin/builder/spi-builder-workspace/Sources/NeedleFoundation/Internal/DependencyProviderRegistry.swift:32:23: warning: static property 'instance' is not concurrency-safe because non-'Sendable' type '__DependencyProviderRegistry' may have shared mutable state; this is an error in the Swift 6 language mode
 27 | // component subclasses that override the method to instantiate the
 28 | // dependency providers.
 29 | public class __DependencyProviderRegistry {
    |              `- note: class '__DependencyProviderRegistry' does not conform to the 'Sendable' protocol
 30 |
 31 |     /// The singleton instance.
 32 |     public static let instance = __DependencyProviderRegistry()
    |                       |- warning: static property 'instance' is not concurrency-safe because non-'Sendable' type '__DependencyProviderRegistry' may have shared mutable state; this is an error in the Swift 6 language mode
    |                       |- note: add '@MainActor' to make static property 'instance' part of global actor 'MainActor'
    |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 33 |
 34 |     /// Register the given factory closure with given key.
/Users/admin/builder/spi-builder-workspace/Sources/NeedleFoundation/Pluginized/Internal/PluginExtensionProviderRegistry.swift:31:23: warning: static property 'instance' is not concurrency-safe because non-'Sendable' type '__PluginExtensionProviderRegistry' may have shared mutable state; this is an error in the Swift 6 language mode
26 | // all the pluginized component subclasses that override the method to
27 | // instantiate the dependency providers.
28 | public class __PluginExtensionProviderRegistry {
   |              `- note: class '__PluginExtensionProviderRegistry' does not conform to the 'Sendable' protocol
29 |
30 |     /// The singleton instance.
31 |     public static let instance = __PluginExtensionProviderRegistry()
   |                       |- warning: static property 'instance' is not concurrency-safe because non-'Sendable' type '__PluginExtensionProviderRegistry' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: add '@MainActor' to make static property 'instance' part of global actor 'MainActor'
   |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
32 |
33 |     /// Register the given factory closure with given key.
[12/13] Compiling NeedleFoundationTest MockComponentPathBuilder.swift
[13/13] Emitting module NeedleFoundationTest
Build complete! (5.72s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "NeedleFoundation",
  "name" : "NeedleFoundation",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "NeedleFoundation",
      "targets" : [
        "NeedleFoundation"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "NeedleFoundationTest",
      "targets" : [
        "NeedleFoundationTest"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "5"
  ],
  "targets" : [
    {
      "c99name" : "NeedleFoundationTests",
      "module_type" : "SwiftTarget",
      "name" : "NeedleFoundationTests",
      "path" : "Tests/NeedleFoundationTests",
      "sources" : [
        "ComponentTests.swift",
        "DependencyProviderRegistryTests.swift",
        "Pluginized/PluginizedComponentTests.swift"
      ],
      "target_dependencies" : [
        "NeedleFoundation"
      ],
      "type" : "test"
    },
    {
      "c99name" : "NeedleFoundationTestTests",
      "module_type" : "SwiftTarget",
      "name" : "NeedleFoundationTestTests",
      "path" : "Tests/NeedleFoundationTestTests",
      "sources" : [
        "MockComponentPathBuilderTests.swift"
      ],
      "target_dependencies" : [
        "NeedleFoundationTest"
      ],
      "type" : "test"
    },
    {
      "c99name" : "NeedleFoundationTest",
      "module_type" : "SwiftTarget",
      "name" : "NeedleFoundationTest",
      "path" : "Sources/NeedleFoundationTest",
      "product_memberships" : [
        "NeedleFoundationTest"
      ],
      "sources" : [
        "MockComponentPathBuilder.swift"
      ],
      "target_dependencies" : [
        "NeedleFoundation"
      ],
      "type" : "library"
    },
    {
      "c99name" : "NeedleFoundation",
      "module_type" : "SwiftTarget",
      "name" : "NeedleFoundation",
      "path" : "Sources/NeedleFoundation",
      "product_memberships" : [
        "NeedleFoundation",
        "NeedleFoundationTest"
      ],
      "sources" : [
        "Bootstrap.swift",
        "Component.swift",
        "Internal/DependencyProviderRegistry.swift",
        "Pluginized/Internal/PluginExtensionProviderRegistry.swift",
        "Pluginized/NonCoreComponent.swift",
        "Pluginized/PluginizedComponent.swift",
        "Pluginized/PluginizedScopeLifecycle.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.10"
}
Done.