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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 OhMyLog, reference main (71e826), with Swift 6.1 for macOS (SPM) on 26 Apr 2025 18:47:21 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/forkercat/OhMyLog.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/forkercat/OhMyLog
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 71e8260 Update README
Cloned https://github.com/forkercat/OhMyLog.git
Revision (git rev-parse @):
71e8260d2ee70928f03ca0a30e1a744007aa8bd5
SUCCESS checkout https://github.com/forkercat/OhMyLog.git at main
========================================
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": "ohmylog",
      "name": "OhMyLog",
      "url": "https://github.com/forkercat/OhMyLog.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/OhMyLog",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/forkercat/OhMyLog.git
[1/94] Fetching ohmylog
Fetched https://github.com/forkercat/OhMyLog.git from cache (0.61s)
Creating working copy for https://github.com/forkercat/OhMyLog.git
Working copy of https://github.com/forkercat/OhMyLog.git resolved at main (71e8260)
warning: '.resolve-product-dependencies': dependency 'ohmylog' 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/forkercat/OhMyLog.git
https://github.com/forkercat/OhMyLog.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "OhMyLog",
  "name" : "OhMyLog",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "OhMyLog",
      "targets" : [
        "OhMyLog"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "OhMyLog-Demo",
      "targets" : [
        "OhMyLog-Demo"
      ],
      "type" : {
        "executable" : null
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "OhMyLog_Demo",
      "module_type" : "SwiftTarget",
      "name" : "OhMyLog-Demo",
      "path" : "Sources/OhMyLog-Demo",
      "product_memberships" : [
        "OhMyLog-Demo"
      ],
      "sources" : [
        "main.swift"
      ],
      "target_dependencies" : [
        "OhMyLog"
      ],
      "type" : "executable"
    },
    {
      "c99name" : "OhMyLog",
      "module_type" : "SwiftTarget",
      "name" : "OhMyLog",
      "path" : "Sources/OhMyLog",
      "product_memberships" : [
        "OhMyLog",
        "OhMyLog-Demo"
      ],
      "sources" : [
        "Log+Any.swift",
        "Log+String.swift",
        "Log.swift",
        "Logger+Any.swift",
        "Logger+String.swift",
        "Logger.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.3"
}
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...
[0/7] Write sources
[2/7] Write OhMyLog-Demo-entitlement.plist
[3/7] Write swift-version-2F0A5646E1D333AE.txt
[5/14] Compiling OhMyLog Logger.swift
/Users/admin/builder/spi-builder-workspace/Sources/OhMyLog/Logger.swift:13:27: warning: static property 'logLevel' is not concurrency-safe because non-'Sendable' type 'Logger.Level' may have shared mutable state; this is an error in the Swift 6 language mode
11 |     public enum Defaults {
12 |         public static let loggerName = "Default"
13 |         public static let logLevel = Logger.Level.debug
   |                           |- warning: static property 'logLevel' is not concurrency-safe because non-'Sendable' type 'Logger.Level' may have shared mutable state; this is an error in the Swift 6 language mode
   |                           |- note: add '@MainActor' to make static property 'logLevel' part of global actor 'MainActor'
   |                           `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
14 |         public static let showLevelIcon = false
15 |         public static let showContext = true
16 |     }
17 |
18 |     public enum Level: Int {
   |                 `- note: consider making enum 'Level' conform to the 'Sendable' protocol
19 |         case trace
20 |         case debug
[6/14] Compiling OhMyLog Logger+Any.swift
[7/14] Compiling OhMyLog Log+String.swift
[8/14] Compiling OhMyLog Log.swift
/Users/admin/builder/spi-builder-workspace/Sources/OhMyLog/Log.swift:11:16: warning: static property 'logger' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 9 |
10 | public enum Log {
11 |     static var logger = Logger(name: Logger.Defaults.loggerName, level: Logger.Defaults.logLevel)
   |                |- warning: static property 'logger' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                |- note: convert 'logger' to a 'let' constant to make 'Sendable' shared state immutable
   |                |- note: add '@MainActor' to make static property 'logger' part of global actor 'MainActor'
   |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
12 |
13 |     @inline(__always)
[9/14] Compiling OhMyLog Log+Any.swift
[10/14] Emitting module OhMyLog
/Users/admin/builder/spi-builder-workspace/Sources/OhMyLog/Log.swift:11:16: warning: static property 'logger' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 9 |
10 | public enum Log {
11 |     static var logger = Logger(name: Logger.Defaults.loggerName, level: Logger.Defaults.logLevel)
   |                |- warning: static property 'logger' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                |- note: convert 'logger' to a 'let' constant to make 'Sendable' shared state immutable
   |                |- note: add '@MainActor' to make static property 'logger' part of global actor 'MainActor'
   |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
12 |
13 |     @inline(__always)
/Users/admin/builder/spi-builder-workspace/Sources/OhMyLog/Logger.swift:13:27: warning: static property 'logLevel' is not concurrency-safe because non-'Sendable' type 'Logger.Level' may have shared mutable state; this is an error in the Swift 6 language mode
11 |     public enum Defaults {
12 |         public static let loggerName = "Default"
13 |         public static let logLevel = Logger.Level.debug
   |                           |- warning: static property 'logLevel' is not concurrency-safe because non-'Sendable' type 'Logger.Level' may have shared mutable state; this is an error in the Swift 6 language mode
   |                           |- note: add '@MainActor' to make static property 'logLevel' part of global actor 'MainActor'
   |                           `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
14 |         public static let showLevelIcon = false
15 |         public static let showContext = true
16 |     }
17 |
18 |     public enum Level: Int {
   |                 `- note: consider making enum 'Level' conform to the 'Sendable' protocol
19 |         case trace
20 |         case debug
[11/14] Compiling OhMyLog Logger+String.swift
[12/16] Compiling OhMyLog_Demo main.swift
[13/16] Emitting module OhMyLog_Demo
[13/16] Write Objects.LinkFileList
[14/16] Linking OhMyLog-Demo
[15/16] Applying OhMyLog-Demo
Build complete! (5.22s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "OhMyLog",
  "name" : "OhMyLog",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "OhMyLog",
      "targets" : [
        "OhMyLog"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "OhMyLog-Demo",
      "targets" : [
        "OhMyLog-Demo"
      ],
      "type" : {
        "executable" : null
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "OhMyLog_Demo",
      "module_type" : "SwiftTarget",
      "name" : "OhMyLog-Demo",
      "path" : "Sources/OhMyLog-Demo",
      "product_memberships" : [
        "OhMyLog-Demo"
      ],
      "sources" : [
        "main.swift"
      ],
      "target_dependencies" : [
        "OhMyLog"
      ],
      "type" : "executable"
    },
    {
      "c99name" : "OhMyLog",
      "module_type" : "SwiftTarget",
      "name" : "OhMyLog",
      "path" : "Sources/OhMyLog",
      "product_memberships" : [
        "OhMyLog",
        "OhMyLog-Demo"
      ],
      "sources" : [
        "Log+Any.swift",
        "Log+String.swift",
        "Log.swift",
        "Logger+Any.swift",
        "Logger+String.swift",
        "Logger.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.3"
}
Done.