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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 AsyncValue, reference main (c04bdc), with Swift 6.1 for Linux on 27 Apr 2025 04:50:44 UTC.

Swift 6 data race errors: 0

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4606859-3":/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/BrentMifsud/AsyncValue.git
Reference: main
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/BrentMifsud/AsyncValue
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at c04bdc3 Update README to reflect latest api changes (#9)
Cloned https://github.com/BrentMifsud/AsyncValue.git
Revision (git rev-parse @):
c04bdc325ad7f48dd2eb43bdb401c6cfaa5019e3
SUCCESS checkout https://github.com/BrentMifsud/AsyncValue.git at main
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/BrentMifsud/AsyncValue.git
https://github.com/BrentMifsud/AsyncValue.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "AsyncValue",
  "name" : "AsyncValue",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "maccatalyst",
      "version" : "13.0"
    },
    {
      "name" : "macos",
      "version" : "10.15"
    },
    {
      "name" : "tvos",
      "version" : "13.0"
    },
    {
      "name" : "watchos",
      "version" : "6.0"
    }
  ],
  "products" : [
    {
      "name" : "AsyncValue",
      "targets" : [
        "AsyncValue"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "AsyncValueTests",
      "module_type" : "SwiftTarget",
      "name" : "AsyncValueTests",
      "path" : "Tests/AsyncValueTests",
      "sources" : [
        "AsyncValueTests.swift"
      ],
      "target_dependencies" : [
        "AsyncValue"
      ],
      "type" : "test"
    },
    {
      "c99name" : "AsyncValue",
      "module_type" : "SwiftTarget",
      "name" : "AsyncValue",
      "path" : "Sources/AsyncValue",
      "product_memberships" : [
        "AsyncValue"
      ],
      "sources" : [
        "AsyncValue.swift",
        "ContinuationStorage.swift",
        "View+AsyncValue.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.7"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-3":/host -w "$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
[3/6] Compiling AsyncValue View+AsyncValue.swift
[4/6] Emitting module AsyncValue
[5/6] Compiling AsyncValue ContinuationStorage.swift
/host/spi-builder-workspace/Sources/AsyncValue/ContinuationStorage.swift:29:26: warning: sending 'value' risks causing data races; this is an error in the Swift 6 language mode
27 |     func yield(_ value: Value) {
28 |         for (_, continuation) in continuations {
29 |             continuation.yield(value)
   |                          |- warning: sending 'value' risks causing data races; this is an error in the Swift 6 language mode
   |                          `- note: task-isolated 'value' is passed as a 'sending' parameter; Uses in callee may race with later task-isolated uses
30 |         }
31 |     }
[6/6] Compiling AsyncValue AsyncValue.swift
/host/spi-builder-workspace/Sources/AsyncValue/AsyncValue.swift:103:17: warning: capture of 'self' with non-sendable type 'AsyncValue<Value>' in a '@Sendable' closure; this is an error in the Swift 6 language mode
 75 | ///   ```
 76 | @propertyWrapper
 77 | public struct AsyncValue<Value: Equatable> {
    |               `- note: consider making generic struct 'AsyncValue' conform to the 'Sendable' protocol
 78 |     public enum YieldBehavior {
 79 |         case newValues
    :
101 |
102 |             continuation.onTermination = { @Sendable _ in
103 |                 storage.removeContinuation(for: uuid)
    |                 `- warning: capture of 'self' with non-sendable type 'AsyncValue<Value>' in a '@Sendable' closure; this is an error in the Swift 6 language mode
104 |             }
105 |         }
/host/spi-builder-workspace/Sources/AsyncValue/AsyncValue.swift:99:30: warning: sending 'self.wrappedValue' risks causing data races; this is an error in the Swift 6 language mode
 97 |
 98 |             if behavior == .allValues {
 99 |                 continuation.yield(wrappedValue)
    |                              |- warning: sending 'self.wrappedValue' risks causing data races; this is an error in the Swift 6 language mode
    |                              `- note: task-isolated 'self.wrappedValue' is passed as a 'sending' parameter; Uses in callee may race with later task-isolated uses
100 |             }
101 |
Build complete! (8.61s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "AsyncValue",
  "name" : "AsyncValue",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "maccatalyst",
      "version" : "13.0"
    },
    {
      "name" : "macos",
      "version" : "10.15"
    },
    {
      "name" : "tvos",
      "version" : "13.0"
    },
    {
      "name" : "watchos",
      "version" : "6.0"
    }
  ],
  "products" : [
    {
      "name" : "AsyncValue",
      "targets" : [
        "AsyncValue"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "AsyncValueTests",
      "module_type" : "SwiftTarget",
      "name" : "AsyncValueTests",
      "path" : "Tests/AsyncValueTests",
      "sources" : [
        "AsyncValueTests.swift"
      ],
      "target_dependencies" : [
        "AsyncValue"
      ],
      "type" : "test"
    },
    {
      "c99name" : "AsyncValue",
      "module_type" : "SwiftTarget",
      "name" : "AsyncValue",
      "path" : "Sources/AsyncValue",
      "product_memberships" : [
        "AsyncValue"
      ],
      "sources" : [
        "AsyncValue.swift",
        "ContinuationStorage.swift",
        "View+AsyncValue.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.7"
}
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.