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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 java_lang with Swift 5.10 for watchOS using Xcode 15.4.

Build Command

env DEVELOPER_DIR=/Applications/Xcode-15.3.0-Beta.2.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$workDir/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $workDir/.derivedData build -scheme java_lang -destination generic/platform=watchos

Build Log

========================================
RunAll
========================================
Builder version: 4.29.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/PureSwift/java_lang.git
Reference: 2.4.0
Initialized empty Git repository in /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.git/
From https://github.com/PureSwift/java_lang
 * tag               2.4.0      -> FETCH_HEAD
HEAD is now at 2617a20 Swift 4.2/5
Cloned https://github.com/PureSwift/java_lang.git
Revision (git rev-parse @):
2617a2065e53fe0a1cf1151d3ccf40a435a3eeb8
SUCCESS checkout https://github.com/PureSwift/java_lang.git at 2.4.0
========================================
Build
========================================
Selected platform:         watchOS
Swift version:             5.10
Building package at path:  $workDir
https://github.com/PureSwift/java_lang.git
Command line invocation:
    /Applications/Xcode-15.3.0-Beta.2.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
User defaults from command line:
    IDEClonedSourcePackagesDirPathOverride = /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.dependencies
    IDEPackageSupportUseBuiltinSCM = YES
resolved source packages:
2024-02-19 03:54:36.346 xcodebuild[23594:52300525] Requested but did not find extension point with identifier Xcode.DVTDeviceFoundation.Aspect for extension Xcode.IDEiOSSupportCore.Aspect.NBDD of plug-in com.apple.dt.IDE.IDEiOSSupportCore
{
  "project" : {
    "configurations" : [
      "Debug",
      "Release"
    ],
    "name" : "java_lang",
    "schemes" : [
      "java_lang"
    ],
    "targets" : [
      "java_lang"
    ]
  }
}
2024-02-19 03:54:37.368 xcodebuild[23626:52300679] Requested but did not find extension point with identifier Xcode.DVTDeviceFoundation.Aspect for extension Xcode.IDEiOSSupportCore.Aspect.NBDD of plug-in com.apple.dt.IDE.IDEiOSSupportCore
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-15.3.0-Beta.2.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$workDir/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $workDir/.derivedData build -scheme java_lang -destination generic/platform=watchos
Command line invocation:
    /Applications/Xcode-15.3.0-Beta.2.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData build -scheme java_lang -destination generic/platform=watchos
User defaults from command line:
    IDEClonedSourcePackagesDirPathOverride = /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.dependencies
    IDEDerivedDataPathOverride = /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData
    IDEPackageSupportUseBuiltinSCM = YES
2024-02-19 03:54:38.035 xcodebuild[23657:52300792] Requested but did not find extension point with identifier Xcode.DVTDeviceFoundation.Aspect for extension Xcode.IDEiOSSupportCore.Aspect.NBDD of plug-in com.apple.dt.IDE.IDEiOSSupportCore
2024-02-19 03:54:38.476 xcodebuild[23657:52300792] Writing error result bundle to /var/folders/b3/8p5yvk0d16s637btgmtl295m0000gp/T/ResultBundle_2024-19-02_03-54-0038.xcresult
xcodebuild: error: Unable to find a destination matching the provided destination specifier:
		{ generic:1, platform:watchos }
	Available destinations for the "java_lang" scheme:
		{ platform:macOS, arch:arm64, id:00008103-001A103E26D2001E, name:My Mac }
		{ platform:macOS, arch:x86_64, id:00008103-001A103E26D2001E, name:My Mac }
		{ platform:macOS, name:Any Mac }
Command line invocation:
    /Applications/Xcode-15.3.0-Beta.2.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData build -scheme java_lang -destination generic/platform=watchos
User defaults from command line:
    IDEClonedSourcePackagesDirPathOverride = /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.dependencies
    IDEDerivedDataPathOverride = /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData
    IDEPackageSupportUseBuiltinSCM = YES
2024-02-19 03:54:39.838 xcodebuild[23798:52301287] Requested but did not find extension point with identifier Xcode.DVTDeviceFoundation.Aspect for extension Xcode.IDEiOSSupportCore.Aspect.NBDD of plug-in com.apple.dt.IDE.IDEiOSSupportCore
2024-02-19 03:54:40.166 xcodebuild[23798:52301287] Writing error result bundle to /var/folders/b3/8p5yvk0d16s637btgmtl295m0000gp/T/ResultBundle_2024-19-02_03-54-0040.xcresult
xcodebuild: error: Unable to find a destination matching the provided destination specifier:
		{ generic:1, platform:watchos }
	Available destinations for the "java_lang" scheme:
		{ platform:macOS, arch:arm64, id:00008103-001A103E26D2001E, name:My Mac }
		{ platform:macOS, arch:x86_64, id:00008103-001A103E26D2001E, name:My Mac }
		{ platform:macOS, name:Any Mac }
BUILD FAILURE 5.10 watchOS