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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 watchOS 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 generic/platform=watchos

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/TDmZkXJm/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:         watchOS
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/TDmZkXJm/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.dependencies -resolvePackageDependencies
User defaults from command line:
    IDEClonedSourcePackagesDirPathOverride = /Users/builder/builds/TDmZkXJm/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/TDmZkXJm/2/finestructure/swiftpackageindex-builder/spi-builder-workspace
resolved source packages: CStack
objc[65262]: 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 (0x10d7f40e0) and /Library/Developer/CoreSimulator/Volumes/xrOS_21O5181e/Library/Developer/CoreSimulator/Profiles/Runtimes/xrOS 1.1.simruntime/Contents/MacOS/xrOS 1.1 (0x10ef300e0). One of the two will be used. Which one is undefined.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "CStack",
  "name" : "CStack",
  "path" : "/Users/builder/builds/TDmZkXJm/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[65455]: 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 (0x10ce540e0) and /Library/Developer/CoreSimulator/Volumes/xrOS_21O5181e/Library/Developer/CoreSimulator/Profiles/Runtimes/xrOS 1.1.simruntime/Contents/MacOS/xrOS 1.1 (0x10e5980e0). 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 generic/platform=watchos
Command line invocation:
    /Applications/Xcode-15.2.0.app/Contents/Developer/usr/bin/xcodebuild -IDEClonedSourcePackagesDirPathOverride=/Users/builder/builds/TDmZkXJm/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath /Users/builder/builds/TDmZkXJm/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData build -scheme CStack-Package -destination generic/platform=watchos
User defaults from command line:
    IDEClonedSourcePackagesDirPathOverride = /Users/builder/builds/TDmZkXJm/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.dependencies
    IDEDerivedDataPathOverride = /Users/builder/builds/TDmZkXJm/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/TDmZkXJm/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: 6157e8d0efbdffec1feb9ae1997b913e
Build description path: /Users/builder/builds/TDmZkXJm/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/6157e8d0efbdffec1feb9ae1997b913e.xcbuilddata
CreateBuildDirectory /Users/builder/builds/TDmZkXJm/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex
    cd /Users/builder/builds/TDmZkXJm/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/builder/builds/TDmZkXJm/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex
CreateBuildDirectory /Users/builder/builds/TDmZkXJm/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData/Build/Products
    cd /Users/builder/builds/TDmZkXJm/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/builder/builds/TDmZkXJm/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData/Build/Products
CreateBuildDirectory /Users/builder/builds/TDmZkXJm/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData/Build/Products/Debug-watchos
    cd /Users/builder/builds/TDmZkXJm/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/builder/builds/TDmZkXJm/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData/Build/Products/Debug-watchos
CreateBuildDirectory /Users/builder/builds/TDmZkXJm/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/EagerLinkingTBDs/Debug-watchos
    cd /Users/builder/builds/TDmZkXJm/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/builder/builds/TDmZkXJm/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/EagerLinkingTBDs/Debug-watchos
CreateBuildDirectory /Users/builder/builds/TDmZkXJm/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData/Build/Products/Debug-watchos/PackageFrameworks
    cd /Users/builder/builds/TDmZkXJm/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/builder/builds/TDmZkXJm/2/finestructure/swiftpackageindex-builder/spi-builder-workspace/.derivedData/Build/Products/Debug-watchos/PackageFrameworks
** BUILD SUCCEEDED **
objc[65622]: 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 (0x10b3980e0) and /Library/Developer/CoreSimulator/Volumes/xrOS_21O5181e/Library/Developer/CoreSimulator/Profiles/Runtimes/xrOS 1.1.simruntime/Contents/MacOS/xrOS 1.1 (0x10b86c0e0). One of the two will be used. Which one is undefined.
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "CStack",
  "name" : "CStack",
  "path" : "/Users/builder/builds/TDmZkXJm/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.