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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 XCTest-watchOS, reference master (465083), with Swift 6.1 for macOS (SPM) on 26 Apr 2025 06:36:37 UTC.

Swift 6 data race errors: 0

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/dfed/XCTest-watchOS.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/dfed/XCTest-watchOS
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 4650834 Merge pull request #16 from dfed/dependabot/bundler/rexml-3.3.9
Cloned https://github.com/dfed/XCTest-watchOS.git
Revision (git rev-parse @):
46508340dd973c3a7ac97e3c93a193de2e41f4e6
SUCCESS checkout https://github.com/dfed/XCTest-watchOS.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": "xctest-watchos",
      "name": "XCTest-watchOS",
      "url": "https://github.com/dfed/XCTest-watchOS.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/XCTest-watchOS",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/dfed/XCTest-watchOS.git
[1/163] Fetching xctest-watchos
Fetched https://github.com/dfed/XCTest-watchOS.git from cache (0.57s)
Creating working copy for https://github.com/dfed/XCTest-watchOS.git
Working copy of https://github.com/dfed/XCTest-watchOS.git resolved at master (4650834)
warning: '.resolve-product-dependencies': dependency 'xctest-watchos' 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/dfed/XCTest-watchOS.git
https://github.com/dfed/XCTest-watchOS.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "XCTest-watchOS",
  "name" : "XCTest-watchOS",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "watchos",
      "version" : "2.0"
    }
  ],
  "products" : [
    {
      "name" : "XCTest",
      "targets" : [
        "XCTest"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "4",
    "4.2",
    "5"
  ],
  "targets" : [
    {
      "c99name" : "XCTest",
      "module_type" : "SwiftTarget",
      "name" : "XCTest",
      "path" : "Sources/XCTest",
      "product_memberships" : [
        "XCTest"
      ],
      "sources" : [
        "XCTest+watchOS.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
[3/4] Emitting module XCTest
[4/4] Compiling XCTest XCTest+watchOS.swift
Build complete! (0.76s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "XCTest-watchOS",
  "name" : "XCTest-watchOS",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "watchos",
      "version" : "2.0"
    }
  ],
  "products" : [
    {
      "name" : "XCTest",
      "targets" : [
        "XCTest"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "4",
    "4.2",
    "5"
  ],
  "targets" : [
    {
      "c99name" : "XCTest",
      "module_type" : "SwiftTarget",
      "name" : "XCTest",
      "path" : "Sources/XCTest",
      "product_memberships" : [
        "XCTest"
      ],
      "sources" : [
        "XCTest+watchOS.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Done.