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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 master (89d050), with Swift 6.1 for macOS (SPM) on 25 Apr 2025 21:10:13 UTC.

Swift 6 data race errors: 0

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64 -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

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/pvzig/SKClient.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/pvzig/SKClient
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 89d0503 Update README.md
Cloned https://github.com/pvzig/SKClient.git
Revision (git rev-parse @):
89d050307ac42f5a4de5d74dd790ff25185f0c99
SUCCESS checkout https://github.com/pvzig/SKClient.git at master
Fetching https://github.com/pvzig/SKCore
[1/288] Fetching skcore
Fetched https://github.com/pvzig/SKCore from cache (0.70s)
Computing version for https://github.com/pvzig/SKCore
Computed https://github.com/pvzig/SKCore at 4.1.3 (1.28s)
Creating working copy for https://github.com/pvzig/SKCore
Working copy of https://github.com/pvzig/SKCore resolved at 4.1.3
========================================
ResolveProductDependencies
========================================
Resolving dependencies ...
{
  "identity": ".resolve-product-dependencies",
  "name": "resolve-dependencies",
  "url": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "version": "unspecified",
  "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "dependencies": [
    {
      "identity": "skclient",
      "name": "SKClient",
      "url": "https://github.com/pvzig/SKClient.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/SKClient",
      "dependencies": [
        {
          "identity": "skcore",
          "name": "SKCore",
          "url": "https://github.com/pvzig/SKCore",
          "version": "4.1.3",
          "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/SKCore",
          "dependencies": [
          ]
        }
      ]
    }
  ]
}
Fetching https://github.com/pvzig/SKClient.git
[1/125] Fetching skclient
Fetched https://github.com/pvzig/SKClient.git from cache (0.59s)
Fetching https://github.com/pvzig/SKCore from cache
Fetched https://github.com/pvzig/SKCore from cache (0.42s)
Computing version for https://github.com/pvzig/SKCore
Computed https://github.com/pvzig/SKCore at 4.1.3 (0.47s)
Creating working copy for https://github.com/pvzig/SKClient.git
Working copy of https://github.com/pvzig/SKClient.git resolved at master (89d0503)
Creating working copy for https://github.com/pvzig/SKCore
Working copy of https://github.com/pvzig/SKCore resolved at 4.1.3
warning: '.resolve-product-dependencies': dependency 'skclient' is not used by any target
Found 1 product dependencies
  - SKCore
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/pvzig/SKClient.git
https://github.com/pvzig/SKClient.git
{
  "dependencies" : [
    {
      "identity" : "skcore",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "4.1.0",
            "upper_bound" : "4.2.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/pvzig/SKCore"
    }
  ],
  "manifest_display_name" : "SKClient",
  "name" : "SKClient",
  "path" : "/Users/admin/builder/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 ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64 -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
Building for debugging...
[0/3] Write sources
[2/3] Write swift-version-2F0A5646E1D333AE.txt
[4/29] Emitting module SKCore
[5/29] Compiling SKCore TeamIcon.swift
[6/29] Compiling SKCore Topic.swift
[7/31] Compiling SKCore Action.swift
[8/31] Compiling SKCore Attachment.swift
[9/31] Compiling SKCore AttachmentField.swift
[10/31] Compiling SKCore CustomProfile.swift
[11/31] Compiling SKCore CustomProfileField.swift
[12/31] Compiling SKCore DoNotDisturbStatus.swift
[13/31] Compiling SKCore Bot.swift
[14/31] Compiling SKCore Channel.swift
[15/31] Compiling SKCore Comment.swift
[16/31] Compiling SKCore User.swift
[17/31] Compiling SKCore UserGroup.swift
[18/31] Compiling SKCore Message.swift
[19/31] Compiling SKCore OAuthConfig.swift
[20/31] Compiling SKCore RTMOptions.swift
[21/31] Compiling SKCore SlackError.swift
[22/31] Compiling SKCore Team.swift
[23/31] Compiling SKCore File.swift
[24/31] Compiling SKCore History.swift
[25/31] Compiling SKCore Item.swift
[26/31] Compiling SKCore Edited.swift
[27/31] Compiling SKCore Event.swift
[28/31] Compiling SKCore Extensions.swift
[29/31] Compiling SKCore Reaction.swift
[30/31] Compiling SKCore Reply.swift
[31/31] Compiling SKCore Scope.swift
[32/33] Emitting module SKClient
[33/33] Compiling SKClient Client.swift
/Users/admin/builder/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! (6.00s)
Build complete.
{
  "dependencies" : [
    {
      "identity" : "skcore",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "4.1.0",
            "upper_bound" : "4.2.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/pvzig/SKCore"
    }
  ],
  "manifest_display_name" : "SKClient",
  "name" : "SKClient",
  "path" : "/Users/admin/builder/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"
}
Done.