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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 TimeLapse, reference master (3150a4), with Swift 6.1 for Linux on 25 Apr 2025 12:47:27 UTC.

Swift 6 data race errors: 2

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4606859-2":/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/aguilarpgc/timelapse.git
Reference: master
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/aguilarpgc/timelapse
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 3150a43 improved readability
Cloned https://github.com/aguilarpgc/timelapse.git
Revision (git rev-parse @):
3150a438d45ea056d72211e3f595197e095f673c
SUCCESS checkout https://github.com/aguilarpgc/timelapse.git at master
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/aguilarpgc/timelapse.git
https://github.com/aguilarpgc/timelapse.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "TimeLapse",
  "name" : "TimeLapse",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "TimeLapse",
      "targets" : [
        "TimeLapse"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "TimeLapseTests",
      "module_type" : "SwiftTarget",
      "name" : "TimeLapseTests",
      "path" : "Tests/TimeLapseTests",
      "sources" : [
        "TimeLapseTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "TimeLapse"
      ],
      "type" : "test"
    },
    {
      "c99name" : "TimeLapse",
      "module_type" : "SwiftTarget",
      "name" : "TimeLapse",
      "path" : "Sources/TimeLapse",
      "product_memberships" : [
        "TimeLapse"
      ],
      "sources" : [
        "TimeLapse.swift",
        "TimeLapseFormat.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-2":/host -w "$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
[3/5] Compiling TimeLapse TimeLapseFormat.swift
[4/5] Compiling TimeLapse TimeLapse.swift
/host/spi-builder-workspace/Sources/TimeLapse/TimeLapse.swift:11:23: warning: static property 'format' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 9 |
10 | public struct TimeLapse {
11 |     public static var format: TimeLapseFormat = TimeLapseDefaultFormat()
   |                       |- warning: static property 'format' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: convert 'format' to a 'let' constant to make 'Sendable' shared state immutable
   |                       |- note: add '@MainActor' to make static property 'format' part of global actor 'MainActor'
   |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
12 |     public static var justNowSecondsLimit: Int = 5
13 |
/host/spi-builder-workspace/Sources/TimeLapse/TimeLapse.swift:12:23: warning: static property 'justNowSecondsLimit' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
10 | public struct TimeLapse {
11 |     public static var format: TimeLapseFormat = TimeLapseDefaultFormat()
12 |     public static var justNowSecondsLimit: Int = 5
   |                       |- warning: static property 'justNowSecondsLimit' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: convert 'justNowSecondsLimit' to a 'let' constant to make 'Sendable' shared state immutable
   |                       |- note: add '@MainActor' to make static property 'justNowSecondsLimit' part of global actor 'MainActor'
   |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
13 |
14 |     public static func setDefaultFormat() {
[5/5] Emitting module TimeLapse
/host/spi-builder-workspace/Sources/TimeLapse/TimeLapse.swift:11:23: warning: static property 'format' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 9 |
10 | public struct TimeLapse {
11 |     public static var format: TimeLapseFormat = TimeLapseDefaultFormat()
   |                       |- warning: static property 'format' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: convert 'format' to a 'let' constant to make 'Sendable' shared state immutable
   |                       |- note: add '@MainActor' to make static property 'format' part of global actor 'MainActor'
   |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
12 |     public static var justNowSecondsLimit: Int = 5
13 |
/host/spi-builder-workspace/Sources/TimeLapse/TimeLapse.swift:12:23: warning: static property 'justNowSecondsLimit' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
10 | public struct TimeLapse {
11 |     public static var format: TimeLapseFormat = TimeLapseDefaultFormat()
12 |     public static var justNowSecondsLimit: Int = 5
   |                       |- warning: static property 'justNowSecondsLimit' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: convert 'justNowSecondsLimit' to a 'let' constant to make 'Sendable' shared state immutable
   |                       |- note: add '@MainActor' to make static property 'justNowSecondsLimit' part of global actor 'MainActor'
   |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
13 |
14 |     public static func setDefaultFormat() {
Build complete! (17.50s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "TimeLapse",
  "name" : "TimeLapse",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "TimeLapse",
      "targets" : [
        "TimeLapse"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "TimeLapseTests",
      "module_type" : "SwiftTarget",
      "name" : "TimeLapseTests",
      "path" : "Tests/TimeLapseTests",
      "sources" : [
        "TimeLapseTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "TimeLapse"
      ],
      "type" : "test"
    },
    {
      "c99name" : "TimeLapse",
      "module_type" : "SwiftTarget",
      "name" : "TimeLapse",
      "path" : "Sources/TimeLapse",
      "product_memberships" : [
        "TimeLapse"
      ],
      "sources" : [
        "TimeLapse.swift",
        "TimeLapseFormat.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.