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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 Saga, reference main (a9b116), with Swift 6.1 for Linux on 1 May 2025 09:32:04 UTC.

Swift 6 data race errors: 1

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: 4.61.3
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/loopwerk/Saga.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/loopwerk/Saga
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at a9b1165 feat: Improve the atom feed writer, always include the full body text
Cloned https://github.com/loopwerk/Saga.git
Revision (git rev-parse @):
a9b1165b3db3f125454926b78cca02e61016a9aa
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/loopwerk/Saga.git at main
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/loopwerk/Saga.git
https://github.com/loopwerk/Saga.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
    {
      "identity" : "pathkit",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.1",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/kylef/PathKit"
    }
  ],
  "manifest_display_name" : "Saga",
  "name" : "Saga",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "12.0"
    }
  ],
  "products" : [
    {
      "name" : "Saga",
      "targets" : [
        "Saga"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "watch",
      "targets" : [
        "SagaCLI"
      ],
      "type" : {
        "executable" : null
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SagaTests",
      "module_type" : "SwiftTarget",
      "name" : "SagaTests",
      "path" : "Tests/SagaTests",
      "sources" : [
        "SagaTests.swift"
      ],
      "target_dependencies" : [
        "Saga"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SagaCLI",
      "module_type" : "SwiftTarget",
      "name" : "SagaCLI",
      "path" : "Sources/SagaCLI",
      "product_dependencies" : [
        "PathKit"
      ],
      "product_memberships" : [
        "watch"
      ],
      "sources" : [
        "main.swift"
      ],
      "type" : "executable"
    },
    {
      "c99name" : "Saga",
      "module_type" : "SwiftTarget",
      "name" : "Saga",
      "path" : "Sources/Saga",
      "product_dependencies" : [
        "PathKit"
      ],
      "product_memberships" : [
        "Saga"
      ],
      "sources" : [
        "Atom.swift",
        "FileContainer.swift",
        "FileIO.swift",
        "Item.swift",
        "ItemWriteMode.swift",
        "MetadataDecoder.swift",
        "Path+Extensions.swift",
        "ProcessingStep.swift",
        "Reader.swift",
        "RenderingContexts.swift",
        "Saga.swift",
        "String+Slugify.swift",
        "Writer.swift",
        "utils.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.5"
}
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
Fetching https://github.com/kylef/PathKit
[1/1411] Fetching pathkit
Fetched https://github.com/kylef/PathKit from cache (0.42s)
Computing version for https://github.com/kylef/PathKit
Computed https://github.com/kylef/PathKit at 1.0.1 (4.32s)
Fetching https://github.com/kylef/Spectre.git
[1/1021] Fetching spectre
Fetched https://github.com/kylef/Spectre.git from cache (0.38s)
Computing version for https://github.com/kylef/Spectre.git
Computed https://github.com/kylef/Spectre.git at 0.10.1 (1.36s)
Creating working copy for https://github.com/kylef/Spectre.git
Working copy of https://github.com/kylef/Spectre.git resolved at 0.10.1
Creating working copy for https://github.com/kylef/PathKit
Working copy of https://github.com/kylef/PathKit resolved at 1.0.1
Building for debugging...
[0/8] Write sources
[3/8] Write swift-version-24593BA9C3E375BF.txt
[5/10] Emitting module PathKit
[6/10] Compiling PathKit PathKit.swift
[7/11] Wrapping AST for PathKit for debugging
[9/27] Emitting module SagaCLI
[10/27] Compiling SagaCLI main.swift
[11/28] Emitting module Saga
/host/spi-builder-workspace/Sources/Saga/FileIO.swift:15:14: warning: static property 'diskAccess' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
13 | public extension FileIO {
14 |   /// The default version of `FileIO`, which uses PathKit.
15 |   static var diskAccess = Self(
   |              |- warning: static property 'diskAccess' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |              |- note: convert 'diskAccess' to a 'let' constant to make 'Sendable' shared state immutable
   |              |- note: add '@MainActor' to make static property 'diskAccess' part of global actor 'MainActor'
   |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
16 |     resolveSwiftPackageFolder: { path in try path.resolveSwiftPackageFolder() },
17 |     findFiles: { try $0.recursiveChildren().filter(\.isFile) },
/host/spi-builder-workspace/Sources/Saga/Path+Extensions.swift:43:1: warning: extension declares a conformance of imported type 'Path' to imported protocol 'Decodable'; this will not behave correctly if the owners of 'PathKit' introduce this conformance in the future
41 | }
42 |
43 | extension Path: Decodable {
   | |- warning: extension declares a conformance of imported type 'Path' to imported protocol 'Decodable'; this will not behave correctly if the owners of 'PathKit' introduce this conformance in the future
   | `- note: add '@retroactive' to silence this warning
44 |   public init(from decoder: Decoder) throws {
45 |     let container = try decoder.singleValueContainer()
[12/29] Compiling Saga Atom.swift
[13/29] Compiling Saga FileContainer.swift
[15/29] Compiling Saga FileIO.swift
/host/spi-builder-workspace/Sources/Saga/FileIO.swift:15:14: warning: static property 'diskAccess' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
13 | public extension FileIO {
14 |   /// The default version of `FileIO`, which uses PathKit.
15 |   static var diskAccess = Self(
   |              |- warning: static property 'diskAccess' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |              |- note: convert 'diskAccess' to a 'let' constant to make 'Sendable' shared state immutable
   |              |- note: add '@MainActor' to make static property 'diskAccess' part of global actor 'MainActor'
   |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
16 |     resolveSwiftPackageFolder: { path in try path.resolveSwiftPackageFolder() },
17 |     findFiles: { try $0.recursiveChildren().filter(\.isFile) },
[16/29] Compiling Saga Item.swift
/host/spi-builder-workspace/Sources/Saga/FileIO.swift:15:14: warning: static property 'diskAccess' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
13 | public extension FileIO {
14 |   /// The default version of `FileIO`, which uses PathKit.
15 |   static var diskAccess = Self(
   |              |- warning: static property 'diskAccess' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |              |- note: convert 'diskAccess' to a 'let' constant to make 'Sendable' shared state immutable
   |              |- note: add '@MainActor' to make static property 'diskAccess' part of global actor 'MainActor'
   |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
16 |     resolveSwiftPackageFolder: { path in try path.resolveSwiftPackageFolder() },
17 |     findFiles: { try $0.recursiveChildren().filter(\.isFile) },
[17/29] Compiling Saga Path+Extensions.swift
/host/spi-builder-workspace/Sources/Saga/Path+Extensions.swift:43:1: warning: extension declares a conformance of imported type 'Path' to imported protocol 'Decodable'; this will not behave correctly if the owners of 'PathKit' introduce this conformance in the future
41 | }
42 |
43 | extension Path: Decodable {
   | |- warning: extension declares a conformance of imported type 'Path' to imported protocol 'Decodable'; this will not behave correctly if the owners of 'PathKit' introduce this conformance in the future
   | `- note: add '@retroactive' to silence this warning
44 |   public init(from decoder: Decoder) throws {
45 |     let container = try decoder.singleValueContainer()
[18/29] Compiling Saga ProcessingStep.swift
/host/spi-builder-workspace/Sources/Saga/Path+Extensions.swift:43:1: warning: extension declares a conformance of imported type 'Path' to imported protocol 'Decodable'; this will not behave correctly if the owners of 'PathKit' introduce this conformance in the future
41 | }
42 |
43 | extension Path: Decodable {
   | |- warning: extension declares a conformance of imported type 'Path' to imported protocol 'Decodable'; this will not behave correctly if the owners of 'PathKit' introduce this conformance in the future
   | `- note: add '@retroactive' to silence this warning
44 |   public init(from decoder: Decoder) throws {
45 |     let container = try decoder.singleValueContainer()
[19/29] Compiling Saga utils.swift
[19/29] Wrapping AST for SagaCLI for debugging
[20/29] Write Objects.LinkFileList
[22/29] Compiling Saga Saga.swift
[23/29] Compiling Saga String+Slugify.swift
[24/29] Compiling Saga Reader.swift
[25/29] Compiling Saga RenderingContexts.swift
[26/29] Compiling Saga Writer.swift
[26/29] Linking watch
[28/29] Compiling Saga ItemWriteMode.swift
[29/29] Compiling Saga MetadataDecoder.swift
Build complete! (24.99s)
Build complete.
{
  "dependencies" : [
    {
      "identity" : "pathkit",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.1",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/kylef/PathKit"
    }
  ],
  "manifest_display_name" : "Saga",
  "name" : "Saga",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "12.0"
    }
  ],
  "products" : [
    {
      "name" : "Saga",
      "targets" : [
        "Saga"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "watch",
      "targets" : [
        "SagaCLI"
      ],
      "type" : {
        "executable" : null
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SagaTests",
      "module_type" : "SwiftTarget",
      "name" : "SagaTests",
      "path" : "Tests/SagaTests",
      "sources" : [
        "SagaTests.swift"
      ],
      "target_dependencies" : [
        "Saga"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SagaCLI",
      "module_type" : "SwiftTarget",
      "name" : "SagaCLI",
      "path" : "Sources/SagaCLI",
      "product_dependencies" : [
        "PathKit"
      ],
      "product_memberships" : [
        "watch"
      ],
      "sources" : [
        "main.swift"
      ],
      "type" : "executable"
    },
    {
      "c99name" : "Saga",
      "module_type" : "SwiftTarget",
      "name" : "Saga",
      "path" : "Sources/Saga",
      "product_dependencies" : [
        "PathKit"
      ],
      "product_memberships" : [
        "Saga"
      ],
      "sources" : [
        "Atom.swift",
        "FileContainer.swift",
        "FileIO.swift",
        "Item.swift",
        "ItemWriteMode.swift",
        "MetadataDecoder.swift",
        "Path+Extensions.swift",
        "ProcessingStep.swift",
        "Reader.swift",
        "RenderingContexts.swift",
        "Saga.swift",
        "String+Slugify.swift",
        "Writer.swift",
        "utils.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.5"
}
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.