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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 Finite, reference 4.0.0 (f5376d), with Swift 6.0 for macOS (SPM) on 1 Nov 2024 00:03:33 UTC.

Swift 6 data race errors: 4

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/vknabel/Finite.git
Reference: 4.0.0
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/vknabel/Finite
 * tag               4.0.0      -> FETCH_HEAD
HEAD is now at f5376dd Version 4.0.0
Cloned https://github.com/vknabel/Finite.git
Revision (git rev-parse @):
f5376dd4fe161d7d9f006247754db64982a5b87b
SUCCESS checkout https://github.com/vknabel/Finite.git at 4.0.0
========================================
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": "finite",
      "name": "Finite",
      "url": "https://github.com/vknabel/Finite.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Finite",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/vknabel/Finite.git
[1/810] Fetching finite
Fetched https://github.com/vknabel/Finite.git from cache (1.10s)
Creating working copy for https://github.com/vknabel/Finite.git
Working copy of https://github.com/vknabel/Finite.git resolved at 4.0.0 (f5376dd)
warning: '.resolve-product-dependencies': dependency 'finite' 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/vknabel/Finite.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
[3/7] Compiling Finite Transition.swift
[4/7] Compiling Finite Ref.swift
/Users/admin/builder/spi-builder-workspace/Sources/Ref.swift:37:25: warning: generic parameter 'T' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 5 | }
 6 |
 7 | internal class Ref<T> {
   |                    `- note: 'T' previously declared here
 8 |     private var value: () -> T?
 9 |
   :
35 |     }
36 |
37 |     private struct Weak<T> {
   |                         `- warning: generic parameter 'T' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
38 |         fileprivate weak var value: Box<T>?
39 |     }
/Users/admin/builder/spi-builder-workspace/Sources/Ref.swift:41:23: warning: generic parameter 'T' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 5 | }
 6 |
 7 | internal class Ref<T> {
   |                    `- note: 'T' previously declared here
 8 |     private var value: () -> T?
 9 |
   :
39 |     }
40 |
41 |     private class Box<T>: ReferenceDisposable {
   |                       `- warning: generic parameter 'T' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
42 |         var value: T?
43 |
[5/7] Compiling Finite StateFlow.swift
[6/7] Compiling Finite StateMachine.swift
/Users/admin/builder/spi-builder-workspace/Sources/StateMachine.swift:17:10: warning: associated value 'denied(from:to:)' of 'Sendable'-conforming generic enum 'TransitionError' has non-sendable type 'T'; this is an error in the Swift 6 language mode
 13 |
 14 | /// Indicates that a transition failed.
 15 | public enum TransitionError<T: Hashable>: Error {
    |                             `- note: consider making generic parameter 'T' conform to the 'Sendable' protocol
 16 |     /// Represents a tried transition that is not allowed.
 17 |     case denied(from: T, to: T)
    |          `- warning: associated value 'denied(from:to:)' of 'Sendable'-conforming generic enum 'TransitionError' has non-sendable type 'T'; this is an error in the Swift 6 language mode
 18 | }
 19 |
/Users/admin/builder/spi-builder-workspace/Sources/StateMachine.swift:17:10: warning: associated value 'denied(from:to:)' of 'Sendable'-conforming generic enum 'TransitionError' has non-sendable type 'T'; this is an error in the Swift 6 language mode
 13 |
 14 | /// Indicates that a transition failed.
 15 | public enum TransitionError<T: Hashable>: Error {
    |                             `- note: consider making generic parameter 'T' conform to the 'Sendable' protocol
 16 |     /// Represents a tried transition that is not allowed.
 17 |     case denied(from: T, to: T)
    |          `- warning: associated value 'denied(from:to:)' of 'Sendable'-conforming generic enum 'TransitionError' has non-sendable type 'T'; this is an error in the Swift 6 language mode
 18 | }
 19 |
[7/7] Emitting module Finite
/Users/admin/builder/spi-builder-workspace/Sources/Ref.swift:37:25: warning: generic parameter 'T' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 5 | }
 6 |
 7 | internal class Ref<T> {
   |                    `- note: 'T' previously declared here
 8 |     private var value: () -> T?
 9 |
   :
35 |     }
36 |
37 |     private struct Weak<T> {
   |                         `- warning: generic parameter 'T' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
38 |         fileprivate weak var value: Box<T>?
39 |     }
/Users/admin/builder/spi-builder-workspace/Sources/Ref.swift:41:23: warning: generic parameter 'T' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 5 | }
 6 |
 7 | internal class Ref<T> {
   |                    `- note: 'T' previously declared here
 8 |     private var value: () -> T?
 9 |
   :
39 |     }
40 |
41 |     private class Box<T>: ReferenceDisposable {
   |                       `- warning: generic parameter 'T' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
42 |         var value: T?
43 |
/Users/admin/builder/spi-builder-workspace/Sources/StateMachine.swift:17:10: warning: associated value 'denied(from:to:)' of 'Sendable'-conforming generic enum 'TransitionError' has non-sendable type 'T'; this is an error in the Swift 6 language mode
 13 |
 14 | /// Indicates that a transition failed.
 15 | public enum TransitionError<T: Hashable>: Error {
    |                             `- note: consider making generic parameter 'T' conform to the 'Sendable' protocol
 16 |     /// Represents a tried transition that is not allowed.
 17 |     case denied(from: T, to: T)
    |          `- warning: associated value 'denied(from:to:)' of 'Sendable'-conforming generic enum 'TransitionError' has non-sendable type 'T'; this is an error in the Swift 6 language mode
 18 | }
 19 |
/Users/admin/builder/spi-builder-workspace/Sources/StateMachine.swift:17:10: warning: associated value 'denied(from:to:)' of 'Sendable'-conforming generic enum 'TransitionError' has non-sendable type 'T'; this is an error in the Swift 6 language mode
 13 |
 14 | /// Indicates that a transition failed.
 15 | public enum TransitionError<T: Hashable>: Error {
    |                             `- note: consider making generic parameter 'T' conform to the 'Sendable' protocol
 16 |     /// Represents a tried transition that is not allowed.
 17 |     case denied(from: T, to: T)
    |          `- warning: associated value 'denied(from:to:)' of 'Sendable'-conforming generic enum 'TransitionError' has non-sendable type 'T'; this is an error in the Swift 6 language mode
 18 | }
 19 |
Build complete! (2.55s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Finite",
  "name" : "Finite",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Finite",
      "targets" : [
        "Finite"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "FiniteTests",
      "module_type" : "SwiftTarget",
      "name" : "FiniteTests",
      "path" : "Tests",
      "sources" : [
        "FiniteTests/StateFlowTests.swift",
        "FiniteTests/StateMachine.swift",
        "FiniteTests/SwiftShim.swift",
        "FiniteTests/TransitionTests.swift",
        "LinuxMain.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "Finite"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Finite",
      "module_type" : "SwiftTarget",
      "name" : "Finite",
      "path" : "Sources",
      "product_memberships" : [
        "Finite"
      ],
      "sources" : [
        "Ref.swift",
        "StateFlow.swift",
        "StateMachine.swift",
        "Transition.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Done.