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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

Failed to build Transmission, reference main (747deb), with Swift 6.1 for macOS (SPM) on 28 Apr 2025 06:48:17 UTC.

Build Command

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

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/nathantannar4/Transmission.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/nathantannar4/Transmission
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 747debc 2.2.1
Cloned https://github.com/nathantannar4/Transmission.git
Revision (git rev-parse @):
747debcb016be47ba53cabf5862763688475b43e
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/nathantannar4/Transmission.git at main
Fetching https://github.com/nathantannar4/Engine
[11/1010] Fetching engine
Fetched https://github.com/nathantannar4/Engine from cache (1.12s)
Computing version for https://github.com/nathantannar4/Engine
Computed https://github.com/nathantannar4/Engine at 2.1.2 (1.63s)
Fetching https://github.com/swiftlang/swift-syntax from cache
Fetched https://github.com/swiftlang/swift-syntax from cache (1.03s)
Computing version for https://github.com/swiftlang/swift-syntax
Computed https://github.com/swiftlang/swift-syntax at 600.0.1 (2.07s)
Creating working copy for https://github.com/nathantannar4/Engine
Working copy of https://github.com/nathantannar4/Engine resolved at 2.1.2
Creating working copy for https://github.com/swiftlang/swift-syntax
Working copy of https://github.com/swiftlang/swift-syntax resolved at 600.0.1
========================================
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": "transmission",
      "name": "Transmission",
      "url": "https://github.com/nathantannar4/Transmission.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Transmission",
      "dependencies": [
        {
          "identity": "engine",
          "name": "Engine",
          "url": "https://github.com/nathantannar4/Engine",
          "version": "2.1.2",
          "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Engine",
          "dependencies": [
            {
              "identity": "swift-syntax",
              "name": "swift-syntax",
              "url": "https://github.com/swiftlang/swift-syntax",
              "version": "600.0.1",
              "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/swift-syntax",
              "dependencies": [
              ]
            }
          ]
        }
      ]
    }
  ]
}
Fetching https://github.com/nathantannar4/Transmission.git
[1/1315] Fetching transmission
Fetched https://github.com/nathantannar4/Transmission.git from cache (4.89s)
Fetching https://github.com/nathantannar4/Engine from cache
Fetched https://github.com/nathantannar4/Engine from cache (0.44s)
Computing version for https://github.com/nathantannar4/Engine
Computed https://github.com/nathantannar4/Engine at 2.1.2 (0.49s)
Fetching https://github.com/swiftlang/swift-syntax from cache
Fetched https://github.com/swiftlang/swift-syntax from cache (0.85s)
Computing version for https://github.com/swiftlang/swift-syntax
Computed https://github.com/swiftlang/swift-syntax at 600.0.1 (0.91s)
Creating working copy for https://github.com/nathantannar4/Engine
Working copy of https://github.com/nathantannar4/Engine resolved at 2.1.2
Creating working copy for https://github.com/swiftlang/swift-syntax
Working copy of https://github.com/swiftlang/swift-syntax resolved at 600.0.1
Creating working copy for https://github.com/nathantannar4/Transmission.git
Working copy of https://github.com/nathantannar4/Transmission.git resolved at main (747debc)
warning: '.resolve-product-dependencies': dependency 'transmission' is not used by any target
Found 1 product dependencies
  - Engine
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/nathantannar4/Transmission.git
https://github.com/nathantannar4/Transmission.git
{
  "dependencies" : [
    {
      "identity" : "engine",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "2.1.1",
            "upper_bound" : "3.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/nathantannar4/Engine"
    }
  ],
  "manifest_display_name" : "Transmission",
  "name" : "Transmission",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "maccatalyst",
      "version" : "13.0"
    },
    {
      "name" : "visionos",
      "version" : "1.0"
    }
  ],
  "products" : [
    {
      "name" : "Transmission",
      "targets" : [
        "Transmission"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "Transmission",
      "module_type" : "SwiftTarget",
      "name" : "Transmission",
      "path" : "Sources/Transmission",
      "product_dependencies" : [
        "Engine"
      ],
      "product_memberships" : [
        "Transmission"
      ],
      "sources" : [
        "Sources/DestinationCoordinator.swift",
        "Sources/DestinationLink.swift",
        "Sources/DestinationLinkAdapter.swift",
        "Sources/DestinationLinkModifier.swift",
        "Sources/DestinationLinkTransition.swift",
        "Sources/DestinationLinkTransitionRepresentable.swift",
        "Sources/DestinationSourceViewLink.swift",
        "Sources/DismissPresentationLink.swift",
        "Sources/DynamicProperty/WeakState.swift",
        "Sources/Extensions/Animation+Extensions.swift",
        "Sources/Extensions/CGAffineTransform+Extensions.swift",
        "Sources/Extensions/CGRect+Extensions.swift",
        "Sources/Extensions/UIColor+Extensions.swift",
        "Sources/Extensions/UIGestureRecognizer+Extensions.swift",
        "Sources/Extensions/UIKit+Extensions.swift",
        "Sources/Extensions/UINavigationController+Extensions.swift",
        "Sources/Extensions/UIScreen+Extensions.swift",
        "Sources/Extensions/UISheetPresentationController+Extensions.swift",
        "Sources/Extensions/UISplitViewController+Extensions.swift",
        "Sources/Extensions/UIView+Extensions.swift",
        "Sources/Extensions/UIViewController+Extensions.swift",
        "Sources/Extensions/UIWindow+Extensions.swift",
        "Sources/Hosting/AnyHostingView.swift",
        "Sources/Hosting/DestinationHostingController.swift",
        "Sources/Hosting/PresentationHostingController.swift",
        "Sources/Hosting/PresentationHostingWindow.swift",
        "Sources/Hosting/SnapshotRenderer.swift",
        "Sources/Presentation Controllers/CardPresentationController.swift",
        "Sources/Presentation Controllers/InteractivePresentationController.swift",
        "Sources/Presentation Controllers/MatchedGeometryPresentationController.swift",
        "Sources/Presentation Controllers/PopoverPresentationController.swift",
        "Sources/Presentation Controllers/PresentationController.swift",
        "Sources/Presentation Controllers/PresentationControllerTransition.swift",
        "Sources/Presentation Controllers/SheetPresentationController.swift",
        "Sources/Presentation Controllers/SlidePresentationController.swift",
        "Sources/Presentation Controllers/ToastPresentationController.swift",
        "Sources/PresentationCoordinator.swift",
        "Sources/PresentationLink.swift",
        "Sources/PresentationLinkAdapter.swift",
        "Sources/PresentationLinkAsymmetricTransition.swift",
        "Sources/PresentationLinkModifier.swift",
        "Sources/PresentationLinkTransition.swift",
        "Sources/PresentationLinkTransitionRepresentable.swift",
        "Sources/PresentationSourceViewLink.swift",
        "Sources/QuickLookPreviewLink.swift",
        "Sources/ShareSheetLink.swift",
        "Sources/StatusBarModifier.swift",
        "Sources/Supporting Files/ObjCBox.swift",
        "Sources/Supporting Files/PortalView.swift",
        "Sources/Supporting Files/PresentationDelegate.swift",
        "Sources/Supporting Files/TransitionSourceView.swift",
        "Sources/Supporting Files/WindowReader.swift",
        "Sources/TransitionReader+AppearanceTransition .swift",
        "Sources/TransitionReader.swift",
        "Sources/ViewControllerReader.swift",
        "Sources/ViewControllerRepresentableAdapter.swift",
        "Sources/ViewRepresentableAdapter.swift",
        "Sources/WindowLink.swift",
        "Sources/WindowLinkModifier.swift",
        "Sources/WindowLinkTransition.swift",
        "module.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.9"
}
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
error: the library 'Transmission' requires macos 10.13, but depends on the product 'Engine' which requires macos 10.15; consider changing the library 'Transmission' to require macos 10.15 or later, or the product 'Engine' to require macos 10.13 or earlier.
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64
error: the library 'Transmission' requires macos 10.13, but depends on the product 'Engine' which requires macos 10.15; consider changing the library 'Transmission' to require macos 10.15 or later, or the product 'Engine' to require macos 10.13 or earlier.
BUILD FAILURE 6.1 macosSpm