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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 SKClient, reference 4.1.0 (008e10), with Swift 6.1 for Linux on 25 Apr 2025 21:02:25 UTC.

Swift 6 data race errors: 0

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4606859-0":/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/pvzig/SKClient.git
Reference: 4.1.0
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/pvzig/SKClient
 * tag               4.1.0      -> FETCH_HEAD
HEAD is now at 008e10a Merge branch 'swift4'
Cloned https://github.com/pvzig/SKClient.git
Revision (git rev-parse @):
008e10a402f17519750a5b94c4cf6b16310abf18
SUCCESS checkout https://github.com/pvzig/SKClient.git at 4.1.0
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/pvzig/SKClient.git
https://github.com/pvzig/SKClient.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
    {
      "identity" : "skcore",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "4.1.0",
            "upper_bound" : "4.2.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/SlackKit/SKCore"
    }
  ],
  "manifest_display_name" : "SKClient",
  "name" : "SKClient",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "SKClient",
      "targets" : [
        "SKClient"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SKClient",
      "module_type" : "SwiftTarget",
      "name" : "SKClient",
      "path" : "Sources",
      "product_dependencies" : [
        "SKCore"
      ],
      "product_memberships" : [
        "SKClient"
      ],
      "sources" : [
        "Client.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.0"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-0":/host -w "$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
Fetching https://github.com/SlackKit/SKCore
[1/288] Fetching skcore
Fetched https://github.com/SlackKit/SKCore from cache (0.22s)
Computing version for https://github.com/SlackKit/SKCore
Computed https://github.com/SlackKit/SKCore at 4.1.3 (0.76s)
Creating working copy for https://github.com/SlackKit/SKCore
Working copy of https://github.com/SlackKit/SKCore resolved at 4.1.3
Building for debugging...
[0/3] Write sources
[2/3] Write swift-version-24593BA9C3E375BF.txt
[4/28] Emitting module SKCore
[5/31] Compiling SKCore Reaction.swift
[6/31] Compiling SKCore Reply.swift
[7/31] Compiling SKCore Scope.swift
[8/31] Compiling SKCore Channel.swift
[9/31] Compiling SKCore Comment.swift
[10/31] Compiling SKCore CustomProfile.swift
[11/31] Compiling SKCore CustomProfileField.swift
[12/31] Compiling SKCore Topic.swift
[13/31] Compiling SKCore User.swift
[14/31] Compiling SKCore UserGroup.swift
[15/31] Compiling SKCore SlackError.swift
[16/31] Compiling SKCore Team.swift
[17/31] Compiling SKCore TeamIcon.swift
[18/31] Compiling SKCore DoNotDisturbStatus.swift
[19/31] Compiling SKCore Edited.swift
[20/31] Compiling SKCore Event.swift
[21/31] Compiling SKCore Extensions.swift
[22/31] Compiling SKCore Action.swift
[23/31] Compiling SKCore Attachment.swift
[24/31] Compiling SKCore AttachmentField.swift
[25/31] Compiling SKCore Bot.swift
[26/31] Compiling SKCore Message.swift
[27/31] Compiling SKCore OAuthConfig.swift
[28/31] Compiling SKCore RTMOptions.swift
[29/31] Compiling SKCore File.swift
[30/31] Compiling SKCore History.swift
[31/31] Compiling SKCore Item.swift
[33/34] Emitting module SKClient
[34/34] Compiling SKClient Client.swift
/host/spi-builder-workspace/Sources/Client.swift:279:28: warning: sending 'self' risks causing data races; this is an error in the Swift 6 language mode
277 |         let timeout = DispatchTime.now() + Double(Int64(5.0 * Double(UInt64.nanosecondsPerSecond))) / Double(UInt64.nanosecondsPerSecond)
278 |         DispatchQueue.main.asyncAfter(deadline: timeout, execute: {
279 |             if let index = self.channels[channelID]?.usersTyping.index(of: userID) {
    |                            |- warning: sending 'self' risks causing data races; this is an error in the Swift 6 language mode
    |                            `- note: task-isolated 'self' is captured by a main actor-isolated closure. main actor-isolated uses in closure may race against later nonisolated uses
280 |                 self.channels[channelID]?.usersTyping.remove(at: index)
281 |             }
Build complete! (9.83s)
Build complete.
{
  "dependencies" : [
    {
      "identity" : "skcore",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "4.1.0",
            "upper_bound" : "4.2.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/SlackKit/SKCore"
    }
  ],
  "manifest_display_name" : "SKClient",
  "name" : "SKClient",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "SKClient",
      "targets" : [
        "SKClient"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SKClient",
      "module_type" : "SwiftTarget",
      "name" : "SKClient",
      "path" : "Sources",
      "product_dependencies" : [
        "SKCore"
      ],
      "product_memberships" : [
        "SKClient"
      ],
      "sources" : [
        "Client.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.