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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 Codability, reference 0.2.1 (eb5bac), with Swift 6.1 for Linux on 25 Apr 2025 14:49:39 UTC.

Swift 6 data race errors: 1

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/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/yonaskolb/Codability.git
Reference: 0.2.1
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/yonaskolb/Codability
 * tag               0.2.1      -> FETCH_HEAD
HEAD is now at eb5bac7 Add changelog
Cloned https://github.com/yonaskolb/Codability.git
Revision (git rev-parse @):
eb5bac78e0679f521c3f058c1eb9be0dd657dadd
SUCCESS checkout https://github.com/yonaskolb/Codability.git at 0.2.1
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/yonaskolb/Codability.git
https://github.com/yonaskolb/Codability.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Codability",
  "name" : "Codability",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Codability",
      "targets" : [
        "Codability"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "CodabilityTests",
      "module_type" : "SwiftTarget",
      "name" : "CodabilityTests",
      "path" : "Tests/CodabilityTests",
      "sources" : [
        "AnyCodableTests.swift",
        "InvalidElementTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "Codability"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Codability",
      "module_type" : "SwiftTarget",
      "name" : "Codability",
      "path" : "Sources/Codability",
      "product_memberships" : [
        "Codability"
      ],
      "sources" : [
        "AnyCodable.swift",
        "GenericDecodingContainer.swift",
        "InvalidElementStrategy.swift",
        "KeyedDecodingContainer+Any.swift",
        "KeyedEncodingContainer+Any.swift",
        "RawCodingKey.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.0"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/host -w "$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
[3/9] Compiling Codability KeyedDecodingContainer+Any.swift
[4/9] Compiling Codability RawCodingKey.swift
[5/9] Compiling Codability InvalidElementStrategy.swift
/host/spi-builder-workspace/Sources/Codability/InvalidElementStrategy.swift:36:17: warning: generic parameter 'T' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
  8 | import Foundation
  9 |
 10 | public enum InvalidElementStrategy<T>: CustomStringConvertible {
    |                                    `- note: 'T' previously declared here
 11 |     case remove
 12 |     case fail
    :
 34 |     }
 35 |
 36 |     func toType<T>() -> InvalidElementStrategy<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
 37 |         switch self {
 38 |         case .remove:
[6/9] Compiling Codability GenericDecodingContainer.swift
[7/9] Compiling Codability KeyedEncodingContainer+Any.swift
[8/9] Emitting module Codability
/host/spi-builder-workspace/Sources/Codability/InvalidElementStrategy.swift:36:17: warning: generic parameter 'T' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
  8 | import Foundation
  9 |
 10 | public enum InvalidElementStrategy<T>: CustomStringConvertible {
    |                                    `- note: 'T' previously declared here
 11 |     case remove
 12 |     case fail
    :
 34 |     }
 35 |
 36 |     func toType<T>() -> InvalidElementStrategy<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
 37 |         switch self {
 38 |         case .remove:
[9/9] Compiling Codability AnyCodable.swift
Build complete! (13.94s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Codability",
  "name" : "Codability",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Codability",
      "targets" : [
        "Codability"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "CodabilityTests",
      "module_type" : "SwiftTarget",
      "name" : "CodabilityTests",
      "path" : "Tests/CodabilityTests",
      "sources" : [
        "AnyCodableTests.swift",
        "InvalidElementTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "Codability"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Codability",
      "module_type" : "SwiftTarget",
      "name" : "Codability",
      "path" : "Sources/Codability",
      "product_memberships" : [
        "Codability"
      ],
      "sources" : [
        "AnyCodable.swift",
        "GenericDecodingContainer.swift",
        "InvalidElementStrategy.swift",
        "KeyedDecodingContainer+Any.swift",
        "KeyedEncodingContainer+Any.swift",
        "RawCodingKey.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.0"
}
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.