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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 InputStepper, reference main (1a94d7), with Swift 6.0 for macOS (SPM) on 29 Mar 2025 09:36:10 UTC.

Swift 6 data race errors: 3

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.2.0.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: 4.60.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/mateusz800/InputStepper.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/mateusz800/InputStepper
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 1a94d73  add minValue and maxValue support
Cloned https://github.com/mateusz800/InputStepper.git
Revision (git rev-parse @):
1a94d73bb0c1ef33a76dbea38b4f538049c3873e
SUCCESS checkout https://github.com/mateusz800/InputStepper.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": "inputstepper",
      "name": "InputStepper",
      "url": "https://github.com/mateusz800/InputStepper.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/InputStepper",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/mateusz800/InputStepper.git
[1/175] Fetching inputstepper
Fetched https://github.com/mateusz800/InputStepper.git from cache (0.62s)
Creating working copy for https://github.com/mateusz800/InputStepper.git
Working copy of https://github.com/mateusz800/InputStepper.git resolved at main (1a94d73)
warning: '.resolve-product-dependencies': dependency 'inputstepper' 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/mateusz800/InputStepper.git
https://github.com/mateusz800/InputStepper.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "InputStepper",
  "name" : "InputStepper",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "14.0"
    },
    {
      "name" : "macos",
      "version" : "11.0"
    },
    {
      "name" : "watchos",
      "version" : "8.0"
    },
    {
      "name" : "tvos",
      "version" : "14.0"
    }
  ],
  "products" : [
    {
      "name" : "InputStepper",
      "targets" : [
        "InputStepper"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "InputStepperTests",
      "module_type" : "SwiftTarget",
      "name" : "InputStepperTests",
      "path" : "Tests/InputStepperTests",
      "sources" : [
        "ValueStoreTests.swift"
      ],
      "target_dependencies" : [
        "InputStepper"
      ],
      "type" : "test"
    },
    {
      "c99name" : "InputStepper",
      "module_type" : "SwiftTarget",
      "name" : "InputStepper",
      "path" : "Sources/InputStepper",
      "product_memberships" : [
        "InputStepper"
      ],
      "sources" : [
        "ValueStore.swift",
        "protocols/InputStepperValueStorage.swift",
        "utils/Environment.swift",
        "utils/FloatExtension.swift",
        "views/ControlButton.swift",
        "views/InputStepper.swift",
        "views/MinusButton.swift",
        "views/PlusButton.swift",
        "views/Value.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.5"
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.2.0.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-5BDAB9E9C0126B9D.txt
[3/12] Compiling InputStepper Value.swift
[4/12] Compiling InputStepper MinusButton.swift
[5/12] Compiling InputStepper Environment.swift
/Users/admin/builder/spi-builder-workspace/Sources/InputStepper/utils/Environment.swift:11:23: warning: static property 'value' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 9 |
10 | private struct ValueStoreKey: EnvironmentKey {
11 |     @State static var value: Float = 0
   |                       |- warning: static property 'value' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: convert 'value' to a 'let' constant to make 'Sendable' shared state immutable
   |                       |- note: annotate 'value' 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 |     static let defaultValue = ValueStore($value)
13 | }
/Users/admin/builder/spi-builder-workspace/Sources/InputStepper/utils/Environment.swift:12:16: warning: static property 'defaultValue' is not concurrency-safe because non-'Sendable' type 'ValueStore' may have shared mutable state; this is an error in the Swift 6 language mode
10 | private struct ValueStoreKey: EnvironmentKey {
11 |     @State static var value: Float = 0
12 |     static let defaultValue = ValueStore($value)
   |                |- warning: static property 'defaultValue' is not concurrency-safe because non-'Sendable' type 'ValueStore' may have shared mutable state; this is an error in the Swift 6 language mode
   |                |- note: annotate 'defaultValue' with '@MainActor' if property should only be accessed from the main actor
   |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
13 | }
14 |
/Users/admin/builder/spi-builder-workspace/Sources/InputStepper/ValueStore.swift:11:7: note: class 'ValueStore' does not conform to the 'Sendable' protocol
 9 | import SwiftUI
10 |
11 | class ValueStore: ObservableObject {
   |       `- note: class 'ValueStore' does not conform to the 'Sendable' protocol
12 |     let uuid = NSUUID().uuidString
13 |     @Published var value: Float = 0
[6/12] Compiling InputStepper PlusButton.swift
[7/12] Emitting module InputStepper
/Users/admin/builder/spi-builder-workspace/Sources/InputStepper/utils/Environment.swift:11:23: warning: static property 'value' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 9 |
10 | private struct ValueStoreKey: EnvironmentKey {
11 |     @State static var value: Float = 0
   |                       |- warning: static property 'value' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: convert 'value' to a 'let' constant to make 'Sendable' shared state immutable
   |                       |- note: annotate 'value' with '@MainActor' if property should only be accessed from the main actor
   |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
12 |     static let defaultValue = ValueStore($value)
13 | }
/Users/admin/builder/spi-builder-workspace/Sources/InputStepper/utils/Environment.swift:12:16: warning: static property 'defaultValue' is not concurrency-safe because non-'Sendable' type 'ValueStore' may have shared mutable state; this is an error in the Swift 6 language mode
10 | private struct ValueStoreKey: EnvironmentKey {
11 |     @State static var value: Float = 0
12 |     static let defaultValue = ValueStore($value)
   |                |- warning: static property 'defaultValue' is not concurrency-safe because non-'Sendable' type 'ValueStore' may have shared mutable state; this is an error in the Swift 6 language mode
   |                |- note: annotate 'defaultValue' 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
13 | }
14 |
/Users/admin/builder/spi-builder-workspace/Sources/InputStepper/ValueStore.swift:11:7: note: class 'ValueStore' does not conform to the 'Sendable' protocol
 9 | import SwiftUI
10 |
11 | class ValueStore: ObservableObject {
   |       `- note: class 'ValueStore' does not conform to the 'Sendable' protocol
12 |     let uuid = NSUUID().uuidString
13 |     @Published var value: Float = 0
/Users/admin/builder/spi-builder-workspace/Sources/InputStepper/views/InputStepper.swift:44:24: warning: main actor-isolated operator function '==' cannot be used to satisfy nonisolated protocol requirement; this is an error in the Swift 6 language mode
 8 | import SwiftUI
 9 |
10 | public struct InputStepper<Content: View>: View, Equatable {
   |                                                  `- note: add '@preconcurrency' to the 'Equatable' conformance to defer isolation checking to run time
11 |     let content: Content
12 |     @State var valueStore: ValueStore
   :
42 |     }
43 |
44 |     public static func == (lhs: InputStepper<Content>, rhs: InputStepper<Content>) -> Bool {
   |                        |- warning: main actor-isolated operator function '==' cannot be used to satisfy nonisolated protocol requirement; this is an error in the Swift 6 language mode
   |                        `- note: add 'nonisolated' to '==' to make this operator function not isolated to the actor
45 |         return true
46 |     }
Swift.Equatable:2:17: note: '==' declared here
1 | public protocol Equatable {
2 |     static func == (lhs: Self, rhs: Self) -> Bool
  |                 `- note: '==' declared here
3 | }
[8/12] Compiling InputStepper ControlButton.swift
[9/12] Compiling InputStepper ValueStore.swift
/Users/admin/builder/spi-builder-workspace/Sources/InputStepper/ValueStore.swift:52:42: warning: sending 'self' risks causing data races; this is an error in the Swift 6 language mode
50 |             while !(self.increaseWork?.isCancelled ?? false) {
51 |                 DispatchQueue.main.async {
52 |                     guard let maxValue = self.maxValue else {
   |                                          |- warning: sending 'self' risks causing data races; this is an error in the Swift 6 language mode
   |                                          `- note: task-isolated 'self' is captured by a main actor-isolated closure. main actor-isolated uses in closure may race against later nonisolated uses
53 |                         self.value += self.step
54 |                         return
/Users/admin/builder/spi-builder-workspace/Sources/InputStepper/ValueStore.swift:76:27: warning: sending 'self' risks causing data races; this is an error in the Swift 6 language mode
74 |             while !(self.decreaseWork?.isCancelled ?? false) {
75 |                 DispatchQueue.main.async {
76 |                     guard self.value < Float(self.minValue) else {
   |                           |- warning: sending 'self' risks causing data races; this is an error in the Swift 6 language mode
   |                           `- note: task-isolated 'self' is captured by a main actor-isolated closure. main actor-isolated uses in closure may race against later nonisolated uses
77 |                         self.value -= self.step
78 |                         return
[10/12] Compiling InputStepper InputStepperValueStorage.swift
[11/12] Compiling InputStepper FloatExtension.swift
[12/12] Compiling InputStepper InputStepper.swift
/Users/admin/builder/spi-builder-workspace/Sources/InputStepper/views/InputStepper.swift:44:24: warning: main actor-isolated operator function '==' cannot be used to satisfy nonisolated protocol requirement; this is an error in the Swift 6 language mode
 8 | import SwiftUI
 9 |
10 | public struct InputStepper<Content: View>: View, Equatable {
   |                                                  `- note: add '@preconcurrency' to the 'Equatable' conformance to defer isolation checking to run time
11 |     let content: Content
12 |     @State var valueStore: ValueStore
   :
42 |     }
43 |
44 |     public static func == (lhs: InputStepper<Content>, rhs: InputStepper<Content>) -> Bool {
   |                        |- warning: main actor-isolated operator function '==' cannot be used to satisfy nonisolated protocol requirement; this is an error in the Swift 6 language mode
   |                        `- note: add 'nonisolated' to '==' to make this operator function not isolated to the actor
45 |         return true
46 |     }
Swift.Equatable:2:17: note: '==' declared here
1 | public protocol Equatable {
2 |     static func == (lhs: Self, rhs: Self) -> Bool
  |                 `- note: '==' declared here
3 | }
Build complete! (20.52s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "InputStepper",
  "name" : "InputStepper",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "14.0"
    },
    {
      "name" : "macos",
      "version" : "11.0"
    },
    {
      "name" : "watchos",
      "version" : "8.0"
    },
    {
      "name" : "tvos",
      "version" : "14.0"
    }
  ],
  "products" : [
    {
      "name" : "InputStepper",
      "targets" : [
        "InputStepper"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "InputStepperTests",
      "module_type" : "SwiftTarget",
      "name" : "InputStepperTests",
      "path" : "Tests/InputStepperTests",
      "sources" : [
        "ValueStoreTests.swift"
      ],
      "target_dependencies" : [
        "InputStepper"
      ],
      "type" : "test"
    },
    {
      "c99name" : "InputStepper",
      "module_type" : "SwiftTarget",
      "name" : "InputStepper",
      "path" : "Sources/InputStepper",
      "product_memberships" : [
        "InputStepper"
      ],
      "sources" : [
        "ValueStore.swift",
        "protocols/InputStepperValueStorage.swift",
        "utils/Environment.swift",
        "utils/FloatExtension.swift",
        "views/ControlButton.swift",
        "views/InputStepper.swift",
        "views/MinusButton.swift",
        "views/PlusButton.swift",
        "views/Value.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.5"
}
Done.