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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 swift-gen, reference main (099f4d), with Swift 6.1 for watchOS using Xcode 16.3 on 27 Apr 2025 19:43:33 UTC.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme Gen_watchOS -destination generic/platform=watchOS

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/pointfreeco/swift-gen.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/pointfreeco/swift-gen
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 099f4d2 Update README.md
Cloned https://github.com/pointfreeco/swift-gen.git
Revision (git rev-parse @):
099f4d2cd0a8c245035257de52477da642e909ff
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/pointfreeco/swift-gen.git at main
========================================
Build
========================================
Selected platform:         watchOS
Swift version:             6.1
Building package at path:  $PWD
https://github.com/pointfreeco/swift-gen.git
https://github.com/pointfreeco/swift-gen.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "swift-gen",
  "name" : "swift-gen",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Gen",
      "targets" : [
        "Gen"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "GenTests",
      "module_type" : "SwiftTarget",
      "name" : "GenTests",
      "path" : "Tests/GenTests",
      "sources" : [
        "GenTests.swift"
      ],
      "target_dependencies" : [
        "Gen"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Gen",
      "module_type" : "SwiftTarget",
      "name" : "Gen",
      "path" : "Sources/Gen",
      "product_memberships" : [
        "Gen"
      ],
      "sources" : [
        "AnyRandomNumberGenerator.swift",
        "Gen.swift",
        "LCRNG.swift",
        "UIKit.swift",
        "Xoshiro.swift",
        "Zip.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Command line invocation:
    /Applications/Xcode-16.3.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
Resolved source packages:
  swift-gen: /Users/admin/builder/spi-builder-workspace
resolved source packages: swift-gen
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme Gen_watchOS -destination generic/platform=watchOS 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 Gen_watchOS -destination generic/platform=watchOS "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
Resolve Package Graph
Resolved source packages:
  swift-gen: /Users/admin/builder/spi-builder-workspace
2025-04-27 12:43:32.038 xcodebuild[558:3177] Writing error result bundle to /var/folders/5k/5yc19ymj0jqd5v0zvgfqz0xw0000gn/T/ResultBundle_2025-27-04_12-43-0032.xcresult
xcodebuild: error: The workspace named "spi-builder-workspace" does not contain a scheme named "Gen_watchOS". The "-list" option can be used to find the names of the schemes in the workspace.
Command line invocation:
    /Applications/Xcode-16.3.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/admin/builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
Resolve Package Graph
Resolved source packages:
  swift-gen: /Users/admin/builder/spi-builder-workspace
resolved source packages: swift-gen
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme Gen_watchOS -destination generic/platform=watchOS
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 Gen_watchOS -destination generic/platform=watchOS
Resolve Package Graph
Resolved source packages:
  swift-gen: /Users/admin/builder/spi-builder-workspace
2025-04-27 12:43:33.503 xcodebuild[640:3596] Writing error result bundle to /var/folders/5k/5yc19ymj0jqd5v0zvgfqz0xw0000gn/T/ResultBundle_2025-27-04_12-43-0033.xcresult
xcodebuild: error: The workspace named "spi-builder-workspace" does not contain a scheme named "Gen_watchOS". The "-list" option can be used to find the names of the schemes in the workspace.
BUILD FAILURE 6.1 watchOS