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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 CZlib, reference master (e0fcc7), with Swift 6.1 for macOS (Xcode) using Xcode 16.3 on 26 Apr 2025 03:54:15 UTC.

Swift 6 data race errors: 0

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme CZlib-Package -destination platform=macOS,arch=arm64 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 Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/Kitura/CZlib.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/Kitura/CZlib
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at e0fcc79 Merge pull request #5 from fouadhatem/master
Cloned https://github.com/Kitura/CZlib.git
Revision (git rev-parse @):
e0fcc798170767e687088ce3441d4c04ea573aab
SUCCESS checkout https://github.com/Kitura/CZlib.git at master
========================================
Build
========================================
Selected platform:         macosXcodebuild
Swift version:             6.1
Building package at path:  $PWD
https://github.com/Kitura/CZlib.git
https://github.com/Kitura/CZlib.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "CZlib",
  "name" : "CZlib",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "CZlib",
      "targets" : [
        "CZlib"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "CZlib",
      "module_type" : "SystemLibraryTarget",
      "name" : "CZlib",
      "path" : ".",
      "product_memberships" : [
        "CZlib"
      ],
      "sources" : [
      ],
      "type" : "system-target"
    }
  ],
  "tools_version" : "4.2"
}
warning: 'spi-builder-workspace': ignoring declared target(s) 'CZlib' in the system package
warning: 'spi-builder-workspace': system packages are deprecated; use system library targets instead
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
ignoring declared target(s) 'CZlib' in the system packagesystem packages are deprecated; use system library targets instead
Resolved source packages:
  CZlib: /Users/admin/builder/spi-builder-workspace
resolved source packages: CZlib
{
  "dependencies" : [
  ],
  "manifest_display_name" : "CZlib",
  "name" : "CZlib",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "CZlib",
      "targets" : [
        "CZlib"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "CZlib",
      "module_type" : "SystemLibraryTarget",
      "name" : "CZlib",
      "path" : ".",
      "product_memberships" : [
        "CZlib"
      ],
      "sources" : [
      ],
      "type" : "system-target"
    }
  ],
  "tools_version" : "4.2"
}
warning: 'spi-builder-workspace': ignoring declared target(s) 'CZlib' in the system package
warning: 'spi-builder-workspace': system packages are deprecated; use system library targets instead
{
  "workspace" : {
    "name" : "spi-builder-workspace",
    "schemes" : [
      "CZlib-Package"
    ]
  }
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun xcodebuild -IDEClonedSourcePackagesDirPathOverride=$PWD/.dependencies -skipMacroValidation -skipPackagePluginValidation -derivedDataPath $PWD/.derivedData build -scheme CZlib-Package -destination platform=macOS,arch=arm64 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 CZlib-Package -destination platform=macOS,arch=arm64 "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
ignoring declared target(s) 'CZlib' in the system packagesystem packages are deprecated; use system library targets instead
Resolved source packages:
  CZlib: /Users/admin/builder/spi-builder-workspace
ComputePackagePrebuildTargetDependencyGraph
Prepare packages
CreateBuildRequest
SendProjectDescription
CreateBuildOperation
ComputeTargetDependencyGraph
note: Building targets in dependency order
note: Target dependency graph (2 targets)
    Target 'CZlib' in project 'CZlib'
        ➜ Explicit dependency on target 'CZlib' in project 'CZlib'
    Target 'CZlib' in project 'CZlib' (no dependencies)
GatherProvisioningInputs
CreateBuildDescription
ExecuteExternalTool /Applications/Xcode-16.3.0.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -v -E -dM -isysroot /Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX15.4.sdk -x c -c /dev/null
Build description signature: 9f49fecf6d5ac500de04e813a2c92cae
Build description path: /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/XCBuildData/9f49fecf6d5ac500de04e813a2c92cae.xcbuilddata
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/EagerLinkingTBDs/Debug
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Intermediates.noindex/EagerLinkingTBDs/Debug
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug
CreateBuildDirectory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug/PackageFrameworks
    cd /Users/admin/builder/spi-builder-workspace/.swiftpm/xcode
    builtin-create-build-directory /Users/admin/builder/spi-builder-workspace/.derivedData/Build/Products/Debug/PackageFrameworks
** BUILD SUCCEEDED **
--- xcodebuild: WARNING: Using the first of multiple matching destinations:
{ platform:macOS, arch:arm64, id:744f7c05b65423a3956b8dfa75fe8206ea21b847, name:My Mac }
{ platform:macOS, arch:arm64, variant:Mac Catalyst, id:744f7c05b65423a3956b8dfa75fe8206ea21b847, name:My Mac }
{ platform:macOS, arch:arm64, variant:DriverKit, id:744f7c05b65423a3956b8dfa75fe8206ea21b847, name:My Mac }
{ platform:macOS, arch:arm64, variant:Designed for [iPad,iPhone], id:744f7c05b65423a3956b8dfa75fe8206ea21b847, name:My Mac }
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "CZlib",
  "name" : "CZlib",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "CZlib",
      "targets" : [
        "CZlib"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "CZlib",
      "module_type" : "SystemLibraryTarget",
      "name" : "CZlib",
      "path" : ".",
      "product_memberships" : [
        "CZlib"
      ],
      "sources" : [
      ],
      "type" : "system-target"
    }
  ],
  "tools_version" : "4.2"
}
warning: 'spi-builder-workspace': ignoring declared target(s) 'CZlib' in the system package
warning: 'spi-builder-workspace': system packages are deprecated; use system library targets instead
Done.