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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 Ditto, reference 0.1.1 (65ed86), with Swift 6.1 for Linux on 25 Apr 2025 12:46:46 UTC.

Swift 6 data race errors: 1

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.1-latest swift build --triple x86_64-unknown-linux-gnu -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 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/xspyhack/ditto.git
Reference: 0.1.1
Initialized empty Git repository in /host/spi-builder-workspace/.git/
hint: Using 'master' as the name for the initial branch. This default branch name
hint: is subject to change. To configure the initial branch name to use in all
hint: of your new repositories, which will suppress this warning, call:
hint:
hint: 	git config --global init.defaultBranch <name>
hint:
hint: Names commonly chosen instead of 'master' are 'main', 'trunk' and
hint: 'development'. The just-created branch can be renamed via this command:
hint:
hint: 	git branch -m <name>
From https://github.com/xspyhack/ditto
 * tag               0.1.1      -> FETCH_HEAD
HEAD is now at 65ed861 Fix example build error
Cloned https://github.com/xspyhack/ditto.git
Revision (git rev-parse @):
65ed861e3ef0f3745628e6ab7e118b6442769746
SUCCESS checkout https://github.com/xspyhack/ditto.git at 0.1.1
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/xspyhack/ditto.git
https://github.com/xspyhack/ditto.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Ditto",
  "name" : "Ditto",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Ditto",
      "targets" : [
        "Ditto"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "DittoTests",
      "module_type" : "SwiftTarget",
      "name" : "DittoTests",
      "path" : "Tests/DittoTests",
      "sources" : [
        "ContextTests.swift",
        "EndpointTests.swift",
        "RouteTests.swift",
        "RouterTests.swift"
      ],
      "target_dependencies" : [
        "Ditto"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Ditto",
      "module_type" : "SwiftTarget",
      "name" : "Ditto",
      "path" : "Sources/Ditto",
      "product_memberships" : [
        "Ditto"
      ],
      "sources" : [
        "Context.swift",
        "Endpoint.swift",
        "Extractable.swift",
        "Routable.swift",
        "Route.swift",
        "Router.swift",
        "Routing.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.1-latest swift build --triple x86_64-unknown-linux-gnu -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 2>&1
basic-6.1-latest: Pulling from finestructure/spi-images
Digest: sha256:3bdcac04179f4ed3e5b8e9dbd6e74bbf5ebc0f4fde48bbaad7d1e5c757e65bcb
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-6.1-latest
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-24593BA9C3E375BF.txt
[3/10] Compiling Ditto Routable.swift
[4/10] Compiling Ditto Extractable.swift
[5/10] Compiling Ditto Routing.swift
[6/10] Compiling Ditto Endpoint.swift
[7/10] Compiling Ditto Context.swift
[8/10] Emitting module Ditto
/host/spi-builder-workspace/Sources/Ditto/Router.swift:80:14: warning: associated value 'registerFailed(reason:)' of 'Sendable'-conforming enum 'Error' has non-sendable type 'Router<Coordinator>.Error.RegisterFailureReason'; this is an error in the Swift 6 language mode
 73 | public extension Router {
 74 |     enum Error: Swift.Error, Equatable {
 75 |         public enum RegisterFailureReason: Equatable {
    |                     `- note: consider making enum 'RegisterFailureReason' conform to the 'Sendable' protocol
 76 |             case invalidScheme
 77 |             case invalidHost
 78 |         }
 79 |
 80 |         case registerFailed(reason: RegisterFailureReason)
    |              `- warning: associated value 'registerFailed(reason:)' of 'Sendable'-conforming enum 'Error' has non-sendable type 'Router<Coordinator>.Error.RegisterFailureReason'; this is an error in the Swift 6 language mode
 81 |
 82 |         public static func ==(lhs: Error, rhs: Error) -> Bool {
[9/10] Compiling Ditto Router.swift
/host/spi-builder-workspace/Sources/Ditto/Router.swift:80:14: warning: associated value 'registerFailed(reason:)' of 'Sendable'-conforming enum 'Error' has non-sendable type 'Router<Coordinator>.Error.RegisterFailureReason'; this is an error in the Swift 6 language mode
 73 | public extension Router {
 74 |     enum Error: Swift.Error, Equatable {
 75 |         public enum RegisterFailureReason: Equatable {
    |                     `- note: consider making enum 'RegisterFailureReason' conform to the 'Sendable' protocol
 76 |             case invalidScheme
 77 |             case invalidHost
 78 |         }
 79 |
 80 |         case registerFailed(reason: RegisterFailureReason)
    |              `- warning: associated value 'registerFailed(reason:)' of 'Sendable'-conforming enum 'Error' has non-sendable type 'Router<Coordinator>.Error.RegisterFailureReason'; this is an error in the Swift 6 language mode
 81 |
 82 |         public static func ==(lhs: Error, rhs: Error) -> Bool {
[10/10] Compiling Ditto Route.swift
Build complete! (8.28s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Ditto",
  "name" : "Ditto",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Ditto",
      "targets" : [
        "Ditto"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "DittoTests",
      "module_type" : "SwiftTarget",
      "name" : "DittoTests",
      "path" : "Tests/DittoTests",
      "sources" : [
        "ContextTests.swift",
        "EndpointTests.swift",
        "RouteTests.swift",
        "RouterTests.swift"
      ],
      "target_dependencies" : [
        "Ditto"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Ditto",
      "module_type" : "SwiftTarget",
      "name" : "Ditto",
      "path" : "Sources/Ditto",
      "product_memberships" : [
        "Ditto"
      ],
      "sources" : [
        "Context.swift",
        "Endpoint.swift",
        "Extractable.swift",
        "Routable.swift",
        "Route.swift",
        "Router.swift",
        "Routing.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
basic-6.1-latest: Pulling from finestructure/spi-images
Digest: sha256:3bdcac04179f4ed3e5b8e9dbd6e74bbf5ebc0f4fde48bbaad7d1e5c757e65bcb
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-6.1-latest
Done.