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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 Ciao, reference master (0d0fce), with Swift 6.0 for macOS (SPM) on 7 Jan 2025 17:45:18 UTC.

Swift 6 data race errors: 2

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.2.0.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: 4.60.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/AlTavares/Ciao.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/AlTavares/Ciao
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 0d0fce4 Merge pull request #9 from joshbillions/fix/update_installation_instructions
Cloned https://github.com/AlTavares/Ciao.git
Revision (git rev-parse @):
0d0fce4d163442c8f9ba6fb379206bb2c177f988
SUCCESS checkout https://github.com/AlTavares/Ciao.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": "ciao",
      "name": "Ciao",
      "url": "https://github.com/AlTavares/Ciao.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Ciao",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/AlTavares/Ciao.git
[1/595] Fetching ciao
Fetched https://github.com/AlTavares/Ciao.git from cache (0.79s)
Creating working copy for https://github.com/AlTavares/Ciao.git
Working copy of https://github.com/AlTavares/Ciao.git resolved at master (0d0fce4)
warning: '.resolve-product-dependencies': dependency 'ciao' is not used by any target
Found 0 product dependencies
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $PWD
https://github.com/AlTavares/Ciao.git
https://github.com/AlTavares/Ciao.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Ciao",
  "name" : "Ciao",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Ciao",
      "targets" : [
        "Ciao"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "CiaoTests",
      "module_type" : "SwiftTarget",
      "name" : "CiaoTests",
      "path" : "Tests/CiaoTests",
      "sources" : [
        "CiaoBrowserTests.swift",
        "CiaoServerTests.swift",
        "TestWithExpectation.swift"
      ],
      "target_dependencies" : [
        "Ciao"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Ciao",
      "module_type" : "SwiftTarget",
      "name" : "Ciao",
      "path" : "Sources/Ciao",
      "product_memberships" : [
        "Ciao"
      ],
      "sources" : [
        "CiaoBrowser.swift",
        "CiaoResolver.swift",
        "CiaoServer.swift",
        "Logger.swift",
        "NetServiceExtension.swift",
        "ServiceType.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.2.0.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-5BDAB9E9C0126B9D.txt
[3/9] Compiling Ciao NetServiceExtension.swift
[4/9] Compiling Ciao Logger.swift
/Users/admin/builder/spi-builder-workspace/Sources/Ciao/Logger.swift:34:12: warning: var 'LoggerLevel' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 32 | }
 33 |
 34 | public var LoggerLevel = Level.verbose
    |            |- warning: var 'LoggerLevel' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |            |- note: convert 'LoggerLevel' to a 'let' constant to make 'Sendable' shared state immutable
    |            |- note: annotate 'LoggerLevel' with '@MainActor' if property should only be accessed from the main actor
    |            `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 35 |
 36 | struct Logger {
/Users/admin/builder/spi-builder-workspace/Sources/Ciao/Logger.swift:37:24: warning: static property 'dateFormat' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 35 |
 36 | struct Logger {
 37 |     private static var dateFormat = "yyyy-MM-dd hh:mm:ssSSS"
    |                        |- warning: static property 'dateFormat' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |                        |- note: convert 'dateFormat' to a 'let' constant to make 'Sendable' shared state immutable
    |                        |- note: annotate 'dateFormat' with '@MainActor' if property should only be accessed from the main actor
    |                        `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 38 |     private static var dateFormatter: DateFormatter {
 39 |         let formatter = DateFormatter()
[5/9] Compiling Ciao ServiceType.swift
[6/9] Compiling Ciao CiaoServer.swift
[7/9] Compiling Ciao CiaoBrowser.swift
[8/9] Compiling Ciao CiaoResolver.swift
/Users/admin/builder/spi-builder-workspace/Sources/Ciao/CiaoResolver.swift:32:1: warning: extension declares a conformance of imported type 'Dictionary' to imported protocol 'Error'; this will not behave correctly if the owners of 'Swift' introduce this conformance in the future
30 |
31 | public typealias ErrorDictionary = [String: NSNumber]
32 | extension ErrorDictionary: Error {}
   | |- warning: extension declares a conformance of imported type 'Dictionary' to imported protocol 'Error'; this will not behave correctly if the owners of 'Swift' introduce this conformance in the future
   | `- note: add '@retroactive' to silence this warning
33 |
34 | extension CiaoResolver {
[9/9] Emitting module Ciao
/Users/admin/builder/spi-builder-workspace/Sources/Ciao/CiaoResolver.swift:32:1: warning: extension declares a conformance of imported type 'Dictionary' to imported protocol 'Error'; this will not behave correctly if the owners of 'Swift' introduce this conformance in the future
30 |
31 | public typealias ErrorDictionary = [String: NSNumber]
32 | extension ErrorDictionary: Error {}
   | |- warning: extension declares a conformance of imported type 'Dictionary' to imported protocol 'Error'; this will not behave correctly if the owners of 'Swift' introduce this conformance in the future
   | `- note: add '@retroactive' to silence this warning
33 |
34 | extension CiaoResolver {
/Users/admin/builder/spi-builder-workspace/Sources/Ciao/Logger.swift:34:12: warning: var 'LoggerLevel' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 32 | }
 33 |
 34 | public var LoggerLevel = Level.verbose
    |            |- warning: var 'LoggerLevel' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |            |- note: convert 'LoggerLevel' to a 'let' constant to make 'Sendable' shared state immutable
    |            |- note: annotate 'LoggerLevel' with '@MainActor' if property should only be accessed from the main actor
    |            `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 35 |
 36 | struct Logger {
/Users/admin/builder/spi-builder-workspace/Sources/Ciao/Logger.swift:37:24: warning: static property 'dateFormat' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 35 |
 36 | struct Logger {
 37 |     private static var dateFormat = "yyyy-MM-dd hh:mm:ssSSS"
    |                        |- warning: static property 'dateFormat' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |                        |- note: convert 'dateFormat' to a 'let' constant to make 'Sendable' shared state immutable
    |                        |- note: annotate 'dateFormat' with '@MainActor' if property should only be accessed from the main actor
    |                        `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 38 |     private static var dateFormatter: DateFormatter {
 39 |         let formatter = DateFormatter()
Build complete! (7.32s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Ciao",
  "name" : "Ciao",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Ciao",
      "targets" : [
        "Ciao"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "CiaoTests",
      "module_type" : "SwiftTarget",
      "name" : "CiaoTests",
      "path" : "Tests/CiaoTests",
      "sources" : [
        "CiaoBrowserTests.swift",
        "CiaoServerTests.swift",
        "TestWithExpectation.swift"
      ],
      "target_dependencies" : [
        "Ciao"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Ciao",
      "module_type" : "SwiftTarget",
      "name" : "Ciao",
      "path" : "Sources/Ciao",
      "product_memberships" : [
        "Ciao"
      ],
      "sources" : [
        "CiaoBrowser.swift",
        "CiaoResolver.swift",
        "CiaoServer.swift",
        "Logger.swift",
        "NetServiceExtension.swift",
        "ServiceType.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Done.