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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 HumanString, reference master (3426f9), with Swift 6.1 for macOS (SPM) on 28 Apr 2025 00:18:14 UTC.

Swift 6 data race errors: 2

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/zonble/HumanString.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/zonble/HumanString
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 3426f95 Updates CI settings.
Cloned https://github.com/zonble/HumanString.git
Revision (git rev-parse @):
3426f954f69f672dcdb8762d88970081890b93dd
SUCCESS checkout https://github.com/zonble/HumanString.git at master
========================================
ResolveProductDependencies
========================================
Resolving dependencies ...
{
  "identity": ".resolve-product-dependencies",
  "name": "resolve-dependencies",
  "url": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "version": "unspecified",
  "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "dependencies": [
    {
      "identity": "humanstring",
      "name": "HumanString",
      "url": "https://github.com/zonble/HumanString.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/HumanString",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/zonble/HumanString.git
[2/178] Fetching humanstring
Fetched https://github.com/zonble/HumanString.git from cache (0.81s)
Creating working copy for https://github.com/zonble/HumanString.git
Working copy of https://github.com/zonble/HumanString.git resolved at master (3426f95)
warning: '.resolve-product-dependencies': dependency 'humanstring' is not used by any target
Found 0 product dependencies
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/zonble/HumanString.git
https://github.com/zonble/HumanString.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "HumanString",
  "name" : "HumanString",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "HumanString",
      "targets" : [
        "HumanString"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "HumanStringTests",
      "module_type" : "SwiftTarget",
      "name" : "HumanStringTests",
      "path" : "Tests/HumanStringTests",
      "sources" : [
        "HumanStringTests.swift",
        "RegexTests.swift",
        "StringIndexExtensionsTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "HumanString"
      ],
      "type" : "test"
    },
    {
      "c99name" : "HumanString",
      "module_type" : "SwiftTarget",
      "name" : "HumanString",
      "path" : "Sources/HumanString",
      "product_memberships" : [
        "HumanString"
      ],
      "sources" : [
        "HumanString.swift",
        "Regex.swift",
        "StringIndexExtensions.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete -Xswiftc -enable-upcoming-feature -Xswiftc StrictConcurrency -Xswiftc -enable-upcoming-feature -Xswiftc DisableOutwardActorInference -Xswiftc -enable-upcoming-feature -Xswiftc GlobalActorIsolatedTypesUsability -Xswiftc -enable-upcoming-feature -Xswiftc InferSendableFromCaptures
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-2F0A5646E1D333AE.txt
[3/6] Compiling HumanString StringIndexExtensions.swift
[4/6] Compiling HumanString Regex.swift
/Users/admin/builder/spi-builder-workspace/Sources/HumanString/Regex.swift:72:19: warning: extraneous whitespace between attribute name and '('; this is an error in the Swift 6 language mode
 70 | public struct Match {
 71 |     /// The string.
 72 |     public private (set) var string: String
    |                   `- warning: extraneous whitespace between attribute name and '('; this is an error in the Swift 6 language mode
 73 |     /// The `NSTextCheckingResult` object.
 74 |     public private (set) var checkResult: NSTextCheckingResult
/Users/admin/builder/spi-builder-workspace/Sources/HumanString/Regex.swift:74:19: warning: extraneous whitespace between attribute name and '('; this is an error in the Swift 6 language mode
 72 |     public private (set) var string: String
 73 |     /// The `NSTextCheckingResult` object.
 74 |     public private (set) var checkResult: NSTextCheckingResult
    |                   `- warning: extraneous whitespace between attribute name and '('; this is an error in the Swift 6 language mode
 75 |
 76 |     fileprivate init(_ checkResult: NSTextCheckingResult, _ string: String) {
[5/6] Emitting module HumanString
/Users/admin/builder/spi-builder-workspace/Sources/HumanString/Regex.swift:72:19: warning: extraneous whitespace between attribute name and '('; this is an error in the Swift 6 language mode
 70 | public struct Match {
 71 |     /// The string.
 72 |     public private (set) var string: String
    |                   `- warning: extraneous whitespace between attribute name and '('; this is an error in the Swift 6 language mode
 73 |     /// The `NSTextCheckingResult` object.
 74 |     public private (set) var checkResult: NSTextCheckingResult
/Users/admin/builder/spi-builder-workspace/Sources/HumanString/Regex.swift:74:19: warning: extraneous whitespace between attribute name and '('; this is an error in the Swift 6 language mode
 72 |     public private (set) var string: String
 73 |     /// The `NSTextCheckingResult` object.
 74 |     public private (set) var checkResult: NSTextCheckingResult
    |                   `- warning: extraneous whitespace between attribute name and '('; this is an error in the Swift 6 language mode
 75 |
 76 |     fileprivate init(_ checkResult: NSTextCheckingResult, _ string: String) {
[6/6] Compiling HumanString HumanString.swift
Build complete! (4.45s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "HumanString",
  "name" : "HumanString",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "HumanString",
      "targets" : [
        "HumanString"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "HumanStringTests",
      "module_type" : "SwiftTarget",
      "name" : "HumanStringTests",
      "path" : "Tests/HumanStringTests",
      "sources" : [
        "HumanStringTests.swift",
        "RegexTests.swift",
        "StringIndexExtensionsTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "HumanString"
      ],
      "type" : "test"
    },
    {
      "c99name" : "HumanString",
      "module_type" : "SwiftTarget",
      "name" : "HumanString",
      "path" : "Sources/HumanString",
      "product_memberships" : [
        "HumanString"
      ],
      "sources" : [
        "HumanString.swift",
        "Regex.swift",
        "StringIndexExtensions.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Done.