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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 CStack with Swift 5.9 for macOS (Xcode) using Xcode 15.2.

Swift 6 data race errors: 0

Build Command

env DEVELOPER_DIR=/Applications/Xcode-15.2.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$workDir/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $workDir/.derivedData build -scheme CStack-Package -destination platform=macos,arch=arm64

Build Log

========================================
RunAll
========================================
Builder version: 4.35.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/ml-archive/cstack.git
Reference: 1.0.1
Initialized empty Git repository in /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.git/
From https://github.com/ml-archive/cstack
 * tag               1.0.1      -> FETCH_HEAD
HEAD is now at 213b69f Make CStack product
Cloned https://github.com/ml-archive/cstack.git
Revision (git rev-parse @):
213b69f9b9666b3dea954939f54cbe0fc6800c1d
SUCCESS checkout https://github.com/ml-archive/cstack.git at 1.0.1
========================================
Build
========================================
Selected platform:         macosXcodebuild
Swift version:             5.9
Building package at path:  $workDir
https://github.com/ml-archive/cstack.git
Command line invocation:
    /Applications/Xcode-15.2.0.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
Resolve Package Graph
ignoring declared target(s) 'CStack' in the system packagefailed to retrieve search paths with pkg-config; maybe pkg-config is not installedyou may be able to install cstack using your system-packager:
    brew install vapor/tap/cstack
Resolved source packages:
  CStack: /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace
resolved source packages: CStack
objc[1700]: Class XROS1_1SimRuntime is implemented in both /Library/Developer/CoreSimulator/Volumes/xrOS_21O209/Library/Developer/CoreSimulator/Profiles/Runtimes/xrOS 1.1.simruntime/Contents/MacOS/xrOS 1.1 (0x10d6100e0) and /Library/Developer/CoreSimulator/Volumes/xrOS_21O5181e/Library/Developer/CoreSimulator/Profiles/Runtimes/xrOS 1.1.simruntime/Contents/MacOS/xrOS 1.1 (0x10e5300e0). One of the two will be used. Which one is undefined.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "CStack",
  "name" : "CStack",
  "path" : "/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "CStack",
      "targets" : [
        "CStack"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "CStack",
      "module_type" : "SystemLibraryTarget",
      "name" : "CStack",
      "path" : ".",
      "product_memberships" : [
        "CStack"
      ],
      "sources" : [
      ],
      "type" : "system-target"
    }
  ],
  "tools_version" : "4.0"
}
warning: 'spi-builder-workspace': ignoring declared target(s) 'CStack' in the system package
{
  "workspace" : {
    "name" : "spi-builder-workspace",
    "schemes" : [
      "CStack-Package"
    ]
  }
}
objc[1740]: Class XROS1_1SimRuntime is implemented in both /Library/Developer/CoreSimulator/Volumes/xrOS_21O209/Library/Developer/CoreSimulator/Profiles/Runtimes/xrOS 1.1.simruntime/Contents/MacOS/xrOS 1.1 (0x10f4080e0) and /Library/Developer/CoreSimulator/Volumes/xrOS_21O5181e/Library/Developer/CoreSimulator/Profiles/Runtimes/xrOS 1.1.simruntime/Contents/MacOS/xrOS 1.1 (0x10f41c0e0). One of the two will be used. Which one is undefined.
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-15.2.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$workDir/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $workDir/.derivedData build -scheme CStack-Package -destination platform=macos,arch=arm64
Command line invocation:
    /Applications/Xcode-15.2.0.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 CStack-Package -destination platform=macos,arch=arm64
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
Resolve Package Graph
ignoring declared target(s) 'CStack' in the system packagefailed to retrieve search paths with pkg-config; maybe pkg-config is not installedyou may be able to install cstack using your system-packager:
    brew install vapor/tap/cstack
Resolved source packages:
  CStack: /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace
Prepare packages
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (2 targets)
    Target 'CStack' in project 'CStack'
        ➜ Explicit dependency on target 'CStack' in project 'CStack'
    Target 'CStack' in project 'CStack' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
Build description signature: e04dc40c810bed2418fefe82928d69bc
Build description path: /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/e04dc40c810bed2418fefe82928d69bc.xcbuilddata
CreateBuildDirectory /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData/Build/Products
    cd /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData/Build/Products
CreateBuildDirectory /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex
    cd /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex
CreateBuildDirectory /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/EagerLinkingTBDs/Debug
    cd /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/EagerLinkingTBDs/Debug
CreateBuildDirectory /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData/Build/Products/Debug
    cd /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData/Build/Products/Debug
CreateBuildDirectory /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData/Build/Products/Debug/PackageFrameworks
    cd /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData/Build/Products/Debug/PackageFrameworks
** BUILD SUCCEEDED **
objc[1790]: Class XROS1_1SimRuntime is implemented in both /Library/Developer/CoreSimulator/Volumes/xrOS_21O209/Library/Developer/CoreSimulator/Profiles/Runtimes/xrOS 1.1.simruntime/Contents/MacOS/xrOS 1.1 (0x10d7ec0e0) and /Library/Developer/CoreSimulator/Volumes/xrOS_21O5181e/Library/Developer/CoreSimulator/Profiles/Runtimes/xrOS 1.1.simruntime/Contents/MacOS/xrOS 1.1 (0x112fe00e0). One of the two will be used. Which one is undefined.
--- xcodebuild: WARNING: Using the first of multiple matching destinations:
{ platform:macOS, arch:arm64, id:00008103-001A103E26D2001E }
{ platform:macOS, arch:arm64, variant:Mac Catalyst, id:00008103-001A103E26D2001E }
{ platform:macOS, arch:arm64, variant:DriverKit, id:00008103-001A103E26D2001E }
{ platform:macOS, arch:arm64, variant:Designed for [iPad,iPhone], id:00008103-001A103E26D2001E }
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "CStack",
  "name" : "CStack",
  "path" : "/Users/builder/builds/UKfvDsi8u/2/finestructure/swiftpackageindex-builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "CStack",
      "targets" : [
        "CStack"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "CStack",
      "module_type" : "SystemLibraryTarget",
      "name" : "CStack",
      "path" : ".",
      "product_memberships" : [
        "CStack"
      ],
      "sources" : [
      ],
      "type" : "system-target"
    }
  ],
  "tools_version" : "4.0"
}
warning: 'spi-builder-workspace': ignoring declared target(s) 'CStack' in the system package
Done.