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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 Rasterize, reference main (f44e6c), with Swift 6.1 for macOS (SPM) on 26 Apr 2025 06:24:51 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/fourplusone/rasterize.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/fourplusone/rasterize
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at f44e6c0 Create LICENSE
Cloned https://github.com/fourplusone/rasterize.git
Revision (git rev-parse @):
f44e6c0421fe93b136d7bee85f51b1595657bac3
SUCCESS checkout https://github.com/fourplusone/rasterize.git at main
========================================
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": "rasterize",
      "name": "Rasterize",
      "url": "https://github.com/fourplusone/rasterize.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/rasterize",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/fourplusone/rasterize.git
[3/32] Fetching rasterize
Fetched https://github.com/fourplusone/rasterize.git from cache (0.57s)
Creating working copy for https://github.com/fourplusone/rasterize.git
Working copy of https://github.com/fourplusone/rasterize.git resolved at main (f44e6c0)
Found 0 product dependencies
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/fourplusone/rasterize.git
https://github.com/fourplusone/rasterize.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Rasterize",
  "name" : "Rasterize",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.15"
    }
  ],
  "products" : [
    {
      "name" : "Rasterize",
      "targets" : [
        "Rasterize"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "Example",
      "targets" : [
        "Example"
      ],
      "type" : {
        "executable" : null
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "RasterizeTests",
      "module_type" : "SwiftTarget",
      "name" : "RasterizeTests",
      "path" : "Tests/RasterizeTests",
      "sources" : [
        "RasterizeTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "Rasterize"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Rasterize",
      "module_type" : "SwiftTarget",
      "name" : "Rasterize",
      "path" : "Sources/Rasterize",
      "product_memberships" : [
        "Rasterize",
        "Example"
      ],
      "sources" : [
        "Rasterized.swift"
      ],
      "type" : "library"
    },
    {
      "c99name" : "Example",
      "module_type" : "SwiftTarget",
      "name" : "Example",
      "path" : "Sources/Example",
      "product_memberships" : [
        "Example"
      ],
      "sources" : [
        "main.swift"
      ],
      "target_dependencies" : [
        "Rasterize"
      ],
      "type" : "executable"
    }
  ],
  "tools_version" : "5.3"
}
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...
[0/7] Write sources
[2/7] Write Example-entitlement.plist
[3/7] Write swift-version-2F0A5646E1D333AE.txt
[5/9] Compiling Rasterize Rasterized.swift
/Users/admin/builder/spi-builder-workspace/Sources/Rasterize/Rasterized.swift:22:27: warning: call to main actor-isolated initializer 'init(rootView:)' in a synchronous nonisolated context; this is an error in the Swift 6 language mode
19 |     /// Create a bitmap representation of the view
20 |     /// - Returns: The bitmap representation.
21 |     public func bitmapRepresentation() -> NSBitmapImageRep {
   |                 `- note: add '@MainActor' to make instance method 'bitmapRepresentation()' part of global actor 'MainActor'
22 |         let hostingView = NSHostingView(rootView: view)
   |                           `- warning: call to main actor-isolated initializer 'init(rootView:)' in a synchronous nonisolated context; this is an error in the Swift 6 language mode
23 |         let size = hostingView.intrinsicContentSize
24 |         hostingView.frame = NSRect(origin: .zero, size: size)
SwiftUI.NSHostingView.init:2:44: note: calls to initializer 'init(rootView:)' from outside of its actor context are implicitly asynchronous
1 | generic class NSHostingView {
2 | @MainActor @preconcurrency required public init(rootView: Content)}
  |                                            `- note: calls to initializer 'init(rootView:)' from outside of its actor context are implicitly asynchronous
3 |
/Users/admin/builder/spi-builder-workspace/Sources/Rasterize/Rasterized.swift:23:32: warning: main actor-isolated property 'intrinsicContentSize' can not be referenced from a nonisolated context; this is an error in the Swift 6 language mode
19 |     /// Create a bitmap representation of the view
20 |     /// - Returns: The bitmap representation.
21 |     public func bitmapRepresentation() -> NSBitmapImageRep {
   |                 `- note: add '@MainActor' to make instance method 'bitmapRepresentation()' part of global actor 'MainActor'
22 |         let hostingView = NSHostingView(rootView: view)
23 |         let size = hostingView.intrinsicContentSize
   |                                `- warning: main actor-isolated property 'intrinsicContentSize' can not be referenced from a nonisolated context; this is an error in the Swift 6 language mode
24 |         hostingView.frame = NSRect(origin: .zero, size: size)
25 |
SwiftUI.NSHostingView.intrinsicContentSize:2:54: note: property declared here
1 | generic class NSHostingView {
2 | @MainActor @preconcurrency override dynamic open var intrinsicContentSize: NSSize { get }}
  |                                                      `- note: property declared here
3 |
/Users/admin/builder/spi-builder-workspace/Sources/Rasterize/Rasterized.swift:24:21: warning: main actor-isolated property 'frame' can not be mutated from a nonisolated context; this is an error in the Swift 6 language mode
19 |     /// Create a bitmap representation of the view
20 |     /// - Returns: The bitmap representation.
21 |     public func bitmapRepresentation() -> NSBitmapImageRep {
   |                 `- note: add '@MainActor' to make instance method 'bitmapRepresentation()' part of global actor 'MainActor'
22 |         let hostingView = NSHostingView(rootView: view)
23 |         let size = hostingView.intrinsicContentSize
24 |         hostingView.frame = NSRect(origin: .zero, size: size)
   |                     `- warning: main actor-isolated property 'frame' can not be mutated from a nonisolated context; this is an error in the Swift 6 language mode
25 |
26 |         let context = CGContext(data: nil,
/Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX15.4.sdk/System/Library/Frameworks/AppKit.framework/Headers/NSView.h:129:18: note: mutation of this property is only permitted within the actor
127 | - (void)setFrameOrigin:(NSPoint)newOrigin;
128 | - (void)setFrameSize:(NSSize)newSize;
129 | @property NSRect frame;
    |                  `- note: mutation of this property is only permitted within the actor
130 | @property CGFloat frameRotation;
131 | @property CGFloat frameCenterRotation API_AVAILABLE(macos(10.5));
/Users/admin/builder/spi-builder-workspace/Sources/Rasterize/Rasterized.swift:38:21: warning: call to main actor-isolated instance method 'displayIgnoringOpacity(_:in:)' in a synchronous nonisolated context; this is an error in the Swift 6 language mode
19 |     /// Create a bitmap representation of the view
20 |     /// - Returns: The bitmap representation.
21 |     public func bitmapRepresentation() -> NSBitmapImageRep {
   |                 `- note: add '@MainActor' to make instance method 'bitmapRepresentation()' part of global actor 'MainActor'
22 |         let hostingView = NSHostingView(rootView: view)
23 |         let size = hostingView.intrinsicContentSize
   :
36 |         let graphicsContext = NSGraphicsContext(cgContext: context, flipped: false)
37 |
38 |         hostingView.displayIgnoringOpacity(hostingView.bounds, in: graphicsContext)
   |                     `- warning: call to main actor-isolated instance method 'displayIgnoringOpacity(_:in:)' in a synchronous nonisolated context; this is an error in the Swift 6 language mode
39 |
40 |         return NSBitmapImageRep(cgImage: context.makeImage()!)
AppKit.NSView.displayIgnoringOpacity:2:22: note: calls to instance method 'displayIgnoringOpacity(_:in:)' from outside of its actor context are implicitly asynchronous
1 | class NSView {
2 | @MainActor open func displayIgnoringOpacity(_ rect: NSRect, in context: NSGraphicsContext)}
  |                      |- note: calls to instance method 'displayIgnoringOpacity(_:in:)' from outside of its actor context are implicitly asynchronous
  |                      `- note: main actor isolation inferred from inheritance from class 'NSResponder'
3 |
/Users/admin/builder/spi-builder-workspace/Sources/Rasterize/Rasterized.swift:38:56: warning: main actor-isolated property 'bounds' can not be referenced from a nonisolated context; this is an error in the Swift 6 language mode
19 |     /// Create a bitmap representation of the view
20 |     /// - Returns: The bitmap representation.
21 |     public func bitmapRepresentation() -> NSBitmapImageRep {
   |                 `- note: add '@MainActor' to make instance method 'bitmapRepresentation()' part of global actor 'MainActor'
22 |         let hostingView = NSHostingView(rootView: view)
23 |         let size = hostingView.intrinsicContentSize
   :
36 |         let graphicsContext = NSGraphicsContext(cgContext: context, flipped: false)
37 |
38 |         hostingView.displayIgnoringOpacity(hostingView.bounds, in: graphicsContext)
   |                                                        `- warning: main actor-isolated property 'bounds' can not be referenced from a nonisolated context; this is an error in the Swift 6 language mode
39 |
40 |         return NSBitmapImageRep(cgImage: context.makeImage()!)
/Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX15.4.sdk/System/Library/Frameworks/AppKit.framework/Headers/NSView.h:139:18: note: property declared here
137 | - (void)scaleUnitSquareToSize:(NSSize)newUnitSize;
138 | - (void)rotateByAngle:(CGFloat)angle;
139 | @property NSRect bounds;
    |                  `- note: property declared here
140 |
141 | @property (getter=isFlipped, readonly) BOOL flipped;
/Users/admin/builder/spi-builder-workspace/Sources/Rasterize/Rasterized.swift:38:21: warning: sending 'graphicsContext' risks causing data races; this is an error in the Swift 6 language mode
36 |         let graphicsContext = NSGraphicsContext(cgContext: context, flipped: false)
37 |
38 |         hostingView.displayIgnoringOpacity(hostingView.bounds, in: graphicsContext)
   |                     |- warning: sending 'graphicsContext' risks causing data races; this is an error in the Swift 6 language mode
   |                     `- note: sending 'graphicsContext' to main actor-isolated instance method 'displayIgnoringOpacity(_:in:)' risks causing data races between main actor-isolated and local nonisolated uses
39 |
40 |         return NSBitmapImageRep(cgImage: context.makeImage()!)
   |                                                  `- note: access can happen concurrently
41 |     }
42 | }
/Users/admin/builder/spi-builder-workspace/Sources/Rasterize/Rasterized.swift:22:27: warning: sending 'self.view' risks causing data races; this is an error in the Swift 6 language mode
20 |     /// - Returns: The bitmap representation.
21 |     public func bitmapRepresentation() -> NSBitmapImageRep {
22 |         let hostingView = NSHostingView(rootView: view)
   |                           |- warning: sending 'self.view' risks causing data races; this is an error in the Swift 6 language mode
   |                           `- note: sending task-isolated 'self.view' to main actor-isolated callee risks causing data races between main actor-isolated and task-isolated uses
23 |         let size = hostingView.intrinsicContentSize
24 |         hostingView.frame = NSRect(origin: .zero, size: size)
[6/9] Emitting module Rasterize
[7/11] Emitting module Example
[8/11] Compiling Example main.swift
[8/11] Write Objects.LinkFileList
[9/11] Linking Example
[10/11] Applying Example
Build complete! (8.23s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Rasterize",
  "name" : "Rasterize",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.15"
    }
  ],
  "products" : [
    {
      "name" : "Rasterize",
      "targets" : [
        "Rasterize"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "Example",
      "targets" : [
        "Example"
      ],
      "type" : {
        "executable" : null
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "RasterizeTests",
      "module_type" : "SwiftTarget",
      "name" : "RasterizeTests",
      "path" : "Tests/RasterizeTests",
      "sources" : [
        "RasterizeTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "Rasterize"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Rasterize",
      "module_type" : "SwiftTarget",
      "name" : "Rasterize",
      "path" : "Sources/Rasterize",
      "product_memberships" : [
        "Rasterize",
        "Example"
      ],
      "sources" : [
        "Rasterized.swift"
      ],
      "type" : "library"
    },
    {
      "c99name" : "Example",
      "module_type" : "SwiftTarget",
      "name" : "Example",
      "path" : "Sources/Example",
      "product_memberships" : [
        "Example"
      ],
      "sources" : [
        "main.swift"
      ],
      "target_dependencies" : [
        "Rasterize"
      ],
      "type" : "executable"
    }
  ],
  "tools_version" : "5.3"
}
Done.