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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 Just, reference master (be341d), with Swift 6.0 for macOS (SPM) on 1 Nov 2024 01:49:42 UTC.

Swift 6 data race errors: 2

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.1.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete

Build Log

========================================
RunAll
========================================
Builder version: 4.56.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/dduan/Just.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/dduan/Just
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at be341d3 Fix github url
Cloned https://github.com/dduan/Just.git
Revision (git rev-parse @):
be341d3df1102954339ce04b7f99f6a952535b9f
SUCCESS checkout https://github.com/dduan/Just.git at master
========================================
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": "just",
      "name": "Just",
      "url": "https://github.com/dduan/Just.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Just",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/dduan/Just.git
[1/2172] Fetching just
Fetched https://github.com/dduan/Just.git from cache (1.17s)
Creating working copy for https://github.com/dduan/Just.git
Working copy of https://github.com/dduan/Just.git resolved at master (be341d3)
warning: '.resolve-product-dependencies': dependency 'just' is not used by any target
Found 0 product dependencies
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $PWD
https://github.com/dduan/Just.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.1.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version--7754E27361AE5C74.txt
[3/4] Compiling Just Just.swift
/Users/admin/builder/spi-builder-workspace/Sources/Just/Just.swift:749:7: warning: stored property 'taskConfigs' of 'Sendable'-conforming class 'HTTP' is mutable; this is an error in the Swift 6 language mode
 747 |   }
 748 |
 749 |   var taskConfigs: [TaskID: TaskConfiguration]=[:]
     |       `- warning: stored property 'taskConfigs' of 'Sendable'-conforming class 'HTTP' is mutable; this is an error in the Swift 6 language mode
 750 |   var defaults: JustSessionDefaults!
 751 |   var session: URLSession!
/Users/admin/builder/spi-builder-workspace/Sources/Just/Just.swift:1130:12: warning: let 'Just' is not concurrency-safe because non-'Sendable' type 'JustOf<HTTP>' may have shared mutable state; this is an error in the Swift 6 language mode
 420 | }
 421 |
 422 | public struct JustOf<Adaptor: JustAdaptor> {
     |               `- note: consider making generic struct 'JustOf' conform to the 'Sendable' protocol
 423 |   let adaptor: Adaptor
 424 |   public init(session: URLSession? = nil,
     :
1128 | }
1129 |
1130 | public let Just = JustOf<HTTP>()
     |            |- warning: let 'Just' is not concurrency-safe because non-'Sendable' type 'JustOf<HTTP>' may have shared mutable state; this is an error in the Swift 6 language mode
     |            |- note: annotate 'Just' with '@MainActor' if property should only be accessed from the main actor
     |            `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
1131 |
[4/4] Emitting module Just
/Users/admin/builder/spi-builder-workspace/Sources/Just/Just.swift:749:7: warning: stored property 'taskConfigs' of 'Sendable'-conforming class 'HTTP' is mutable; this is an error in the Swift 6 language mode
 747 |   }
 748 |
 749 |   var taskConfigs: [TaskID: TaskConfiguration]=[:]
     |       `- warning: stored property 'taskConfigs' of 'Sendable'-conforming class 'HTTP' is mutable; this is an error in the Swift 6 language mode
 750 |   var defaults: JustSessionDefaults!
 751 |   var session: URLSession!
/Users/admin/builder/spi-builder-workspace/Sources/Just/Just.swift:1130:12: warning: let 'Just' is not concurrency-safe because non-'Sendable' type 'JustOf<HTTP>' may have shared mutable state; this is an error in the Swift 6 language mode
 420 | }
 421 |
 422 | public struct JustOf<Adaptor: JustAdaptor> {
     |               `- note: consider making generic struct 'JustOf' conform to the 'Sendable' protocol
 423 |   let adaptor: Adaptor
 424 |   public init(session: URLSession? = nil,
     :
1128 | }
1129 |
1130 | public let Just = JustOf<HTTP>()
     |            |- warning: let 'Just' is not concurrency-safe because non-'Sendable' type 'JustOf<HTTP>' may have shared mutable state; this is an error in the Swift 6 language mode
     |            |- note: annotate 'Just' with '@MainActor' if property should only be accessed from the main actor
     |            `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
1131 |
Build complete! (6.61s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Just",
  "name" : "Just",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Just",
      "targets" : [
        "Just"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "JustTests",
      "module_type" : "SwiftTarget",
      "name" : "JustTests",
      "path" : "Tests/JustTests",
      "sources" : [
        "CaseInsensitiveDictionaryTests.swift",
        "JustTests.swift"
      ],
      "target_dependencies" : [
        "Just"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Just",
      "module_type" : "SwiftTarget",
      "name" : "Just",
      "path" : "Sources/Just",
      "product_memberships" : [
        "Just"
      ],
      "sources" : [
        "Just.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Done.