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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 Einsteinium with Swift 6.1 for visionOS using Xcode 16.3.

Build Command

Build command unavailable

Build Log

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RunAll
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Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/e-sites/Einsteinium.git
Reference: v1.3.0
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/e-sites/Einsteinium
 * tag               v1.3.0     -> FETCH_HEAD
HEAD is now at 6fb4530 Made upmost and root viewcontrollers optional
Cloned https://github.com/e-sites/Einsteinium.git
Revision (git rev-parse @):
6fb4530339a8bdaf71614237d488d94ad732de90
SUCCESS checkout https://github.com/e-sites/Einsteinium.git at v1.3.0
========================================
Build
========================================
Selected platform:         visionOS
Swift version:             6.1
Building package at path:  $PWD
https://github.com/e-sites/Einsteinium.git
https://github.com/e-sites/Einsteinium.git
{
  "dependencies" : [
    {
      "identity" : "swift-log",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-log.git"
    }
  ],
  "manifest_display_name" : "Einsteinium",
  "name" : "Einsteinium",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "9.0"
    }
  ],
  "products" : [
    {
      "name" : "Einsteinium",
      "targets" : [
        "Einsteinium"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "Einsteinium",
      "module_type" : "SwiftTarget",
      "name" : "Einsteinium",
      "path" : "Sources",
      "product_dependencies" : [
        "Logging"
      ],
      "product_memberships" : [
        "Einsteinium"
      ],
      "sources" : [
        "Core/Array.swift",
        "Core/Collection.swift",
        "Core/DispatchQueue.swift",
        "Core/Optional.swift",
        "Core/String.swift",
        "CoreGraphics/CGFloat.swift",
        "CoreGraphics/CGRect.swift",
        "CoreLocation/CLLocationCoordinate2D.swift",
        "Foundation/Bundle.swift",
        "Foundation/URL.swift",
        "Logging.swift",
        "UIKit/DesignableXibView.swift",
        "UIKit/UIButton.swift",
        "UIKit/UIDevice.swift",
        "UIKit/UIImage.swift",
        "UIKit/UINavigationController.swift",
        "UIKit/UINibView.swift",
        "UIKit/UITableView.swift",
        "UIKit/UITextField.swift",
        "UIKit/UIView.swift",
        "UIKit/UIViewController.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Command line invocation:
    /Applications/Xcode-16.3.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
resolved source packages:
{
  "dependencies" : [
    {
      "identity" : "swift-log",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-log.git"
    }
  ],
  "manifest_display_name" : "Einsteinium",
  "name" : "Einsteinium",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "9.0"
    }
  ],
  "products" : [
    {
      "name" : "Einsteinium",
      "targets" : [
        "Einsteinium"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "Einsteinium",
      "module_type" : "SwiftTarget",
      "name" : "Einsteinium",
      "path" : "Sources",
      "product_dependencies" : [
        "Logging"
      ],
      "product_memberships" : [
        "Einsteinium"
      ],
      "sources" : [
        "Core/Array.swift",
        "Core/Collection.swift",
        "Core/DispatchQueue.swift",
        "Core/Optional.swift",
        "Core/String.swift",
        "CoreGraphics/CGFloat.swift",
        "CoreGraphics/CGRect.swift",
        "CoreLocation/CLLocationCoordinate2D.swift",
        "Foundation/Bundle.swift",
        "Foundation/URL.swift",
        "Logging.swift",
        "UIKit/DesignableXibView.swift",
        "UIKit/UIButton.swift",
        "UIKit/UIDevice.swift",
        "UIKit/UIImage.swift",
        "UIKit/UINavigationController.swift",
        "UIKit/UINibView.swift",
        "UIKit/UITableView.swift",
        "UIKit/UITextField.swift",
        "UIKit/UIView.swift",
        "UIKit/UIViewController.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
{
  "project" : {
    "configurations" : [
      "Debug",
      "Release"
    ],
    "name" : "Einsteinium",
    "schemes" : [
      "Einsteinium"
    ],
    "targets" : [
      "Einsteinium",
      "EinsteiniumTests"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme Einsteinium -destination generic/platform=xrOS OTHER_SWIFT_FLAGS=-stats-output-dir .stats -strict-concurrency=complete -enable-upcoming-feature StrictConcurrency -enable-upcoming-feature DisableOutwardActorInference -enable-upcoming-feature GlobalActorIsolatedTypesUsability -enable-upcoming-feature InferSendableFromCaptures
Command line invocation:
    /Applications/Xcode-16.3.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath /Users/admin/builder/spi-builder-workspace/.derivedData build -scheme Einsteinium -destination generic/platform=xrOS "OTHER_SWIFT_FLAGS=-stats-output-dir .stats -strict-concurrency=complete -enable-upcoming-feature StrictConcurrency -enable-upcoming-feature DisableOutwardActorInference -enable-upcoming-feature GlobalActorIsolatedTypesUsability -enable-upcoming-feature InferSendableFromCaptures"
Build settings from command line:
    OTHER_SWIFT_FLAGS = -stats-output-dir .stats -strict-concurrency=complete -enable-upcoming-feature StrictConcurrency -enable-upcoming-feature DisableOutwardActorInference -enable-upcoming-feature GlobalActorIsolatedTypesUsability -enable-upcoming-feature InferSendableFromCaptures
2025-04-26 11:30:25.587 xcodebuild[578:3305] Writing error result bundle to /var/folders/5k/5yc19ymj0jqd5v0zvgfqz0xw0000gn/T/ResultBundle_2025-26-04_11-30-0025.xcresult
xcodebuild: error: Unable to find a destination matching the provided destination specifier:
		{ generic:1, platform:xrOS }
	Available destinations for the "Einsteinium" scheme:
		{ platform:macOS, arch:arm64, variant:Mac Catalyst, id:f1ec2f19e0fa23f67112b4ca34772b385e072a96, name:My Mac }
		{ platform:macOS, arch:x86_64, variant:Mac Catalyst, id:f1ec2f19e0fa23f67112b4ca34772b385e072a96, name:My Mac }
		{ platform:macOS, arch:arm64, variant:Designed for [iPad,iPhone], id:f1ec2f19e0fa23f67112b4ca34772b385e072a96, name:My Mac }
		{ platform:iOS, id:dvtdevice-DVTiPhonePlaceholder-iphoneos:placeholder, name:Any iOS Device }
		{ platform:iOS Simulator, id:dvtdevice-DVTiOSDeviceSimulatorPlaceholder-iphonesimulator:placeholder, name:Any iOS Simulator Device }
		{ platform:macOS, variant:Mac Catalyst, name:Any Mac }
INFRASTRUCTURE ERROR (status: destinationUnavailable