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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 AELog, reference master (42e29e), with Swift 6.1 for macOS (SPM) on 26 Apr 2025 21:46:17 UTC.

Swift 6 data race errors: 1

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/tadija/AELog.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/tadija/AELog
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 42e29ec Merge branch 'release/0.6.3'
Cloned https://github.com/tadija/AELog.git
Revision (git rev-parse @):
42e29ec9b026640f4ee4c4a29db3a58712dcc9dc
SUCCESS checkout https://github.com/tadija/AELog.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": "aelog",
      "name": "AELog",
      "url": "https://github.com/tadija/AELog.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/AELog",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/tadija/AELog.git
[1/1098] Fetching aelog
Fetched https://github.com/tadija/AELog.git from cache (0.88s)
Creating working copy for https://github.com/tadija/AELog.git
Working copy of https://github.com/tadija/AELog.git resolved at master (42e29ec)
warning: '.resolve-product-dependencies': dependency 'aelog' 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/tadija/AELog.git
https://github.com/tadija/AELog.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "AELog",
  "name" : "AELog",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "12.0"
    },
    {
      "name" : "macos",
      "version" : "10.10"
    },
    {
      "name" : "tvos",
      "version" : "12.0"
    },
    {
      "name" : "watchos",
      "version" : "3.0"
    }
  ],
  "products" : [
    {
      "name" : "AELog",
      "targets" : [
        "AELog"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "AELogTests",
      "module_type" : "SwiftTarget",
      "name" : "AELogTests",
      "path" : "Tests/AELogTests",
      "sources" : [
        "AELogTests.swift"
      ],
      "target_dependencies" : [
        "AELog"
      ],
      "type" : "test"
    },
    {
      "c99name" : "AELog",
      "module_type" : "SwiftTarget",
      "name" : "AELog",
      "path" : "Sources/AELog",
      "product_memberships" : [
        "AELog"
      ],
      "sources" : [
        "Line.swift",
        "Log.swift",
        "Settings.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.5"
}
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 AELog Line.swift
[4/6] Compiling AELog Log.swift
/Users/admin/builder/spi-builder-workspace/Sources/AELog/Log.swift:84:23: warning: static property 'shared' is not concurrency-safe because non-'Sendable' type 'Log' may have shared mutable state; this is an error in the Swift 6 language mode
 68 |
 69 | /// Handles logging from top level functions
 70 | open class Log {
    |            `- note: class 'Log' does not conform to the 'Sendable' protocol
 71 |
 72 |     /// Logging Mode
    :
 82 |
 83 |     /// Singleton
 84 |     public static let shared = Log()
    |                       |- warning: static property 'shared' is not concurrency-safe because non-'Sendable' type 'Log' may have shared mutable state; this is an error in the Swift 6 language mode
    |                       |- note: add '@MainActor' to make static property 'shared' part of global actor 'MainActor'
    |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 85 |
 86 |     /// Log Delegate
/Users/admin/builder/spi-builder-workspace/Sources/AELog/Log.swift:115:19: warning: capture of 'self' with non-sendable type 'Log' in a '@Sendable' closure
 68 |
 69 | /// Handles logging from top level functions
 70 | open class Log {
    |            `- note: class 'Log' does not conform to the 'Sendable' protocol
 71 |
 72 |     /// Logging Mode
    :
113 |                       text: String) {
114 |         queue.async { [unowned self] in
115 |             guard self.settings.isEnabled || mode == .nsLog else {
    |                   `- warning: capture of 'self' with non-sendable type 'Log' in a '@Sendable' closure
116 |                 return
117 |             }
/Users/admin/builder/spi-builder-workspace/Sources/AELog/Log.swift:115:46: warning: capture of 'mode' with non-sendable type 'Log.Mode' in a '@Sendable' closure
 74 |     /// - print: Writes to debugger console only.
 75 |     /// - nsLog: Writes to both debugger and device console.
 76 |     public enum Mode {
    |                 `- note: consider making enum 'Mode' conform to the 'Sendable' protocol
 77 |         case print
 78 |         case nsLog
    :
113 |                       text: String) {
114 |         queue.async { [unowned self] in
115 |             guard self.settings.isEnabled || mode == .nsLog else {
    |                                              `- warning: capture of 'mode' with non-sendable type 'Log.Mode' in a '@Sendable' closure
116 |                 return
117 |             }
/Users/admin/builder/spi-builder-workspace/Sources/AELog/Log.swift:121:29: warning: capture of 'thread' with non-sendable type 'Thread' in a '@Sendable' closure
119 |             if self.isLogEnabledForFile(with: name) || mode == .nsLog {
120 |                 let line = Line(
121 |                     thread: thread,
    |                             `- warning: capture of 'thread' with non-sendable type 'Thread' in a '@Sendable' closure
122 |                     file: name,
123 |                     number: lineNumber,
/Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX15.4.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSThread.h:13:12: note: class 'Thread' does not conform to the 'Sendable' protocol
11 | NS_HEADER_AUDIT_BEGIN(nullability, sendability)
12 |
13 | @interface NSThread : NSObject  {
   |            `- note: class 'Thread' does not conform to the 'Sendable' protocol
14 | @private
15 |     id _private;
/Users/admin/builder/spi-builder-workspace/Sources/AELog/Log.swift:115:46: warning: implicit capture of 'mode' requires that 'Log.Mode' conforms to 'Sendable'; this is an error in the Swift 6 language mode
 74 |     /// - print: Writes to debugger console only.
 75 |     /// - nsLog: Writes to both debugger and device console.
 76 |     public enum Mode {
    |                 `- note: consider making enum 'Mode' conform to the 'Sendable' protocol
 77 |         case print
 78 |         case nsLog
    :
113 |                       text: String) {
114 |         queue.async { [unowned self] in
115 |             guard self.settings.isEnabled || mode == .nsLog else {
    |                                              `- warning: implicit capture of 'mode' requires that 'Log.Mode' conforms to 'Sendable'; this is an error in the Swift 6 language mode
116 |                 return
117 |             }
/Users/admin/builder/spi-builder-workspace/Sources/AELog/Log.swift:119:56: warning: implicit capture of 'mode' requires that 'Log.Mode' conforms to 'Sendable'; this is an error in the Swift 6 language mode
 74 |     /// - print: Writes to debugger console only.
 75 |     /// - nsLog: Writes to both debugger and device console.
 76 |     public enum Mode {
    |                 `- note: consider making enum 'Mode' conform to the 'Sendable' protocol
 77 |         case print
 78 |         case nsLog
    :
117 |             }
118 |             let name = self.getFileName(for: path)
119 |             if self.isLogEnabledForFile(with: name) || mode == .nsLog {
    |                                                        `- warning: implicit capture of 'mode' requires that 'Log.Mode' conforms to 'Sendable'; this is an error in the Swift 6 language mode
120 |                 let line = Line(
121 |                     thread: thread,
[5/6] Emitting module AELog
/Users/admin/builder/spi-builder-workspace/Sources/AELog/Log.swift:84:23: warning: static property 'shared' is not concurrency-safe because non-'Sendable' type 'Log' may have shared mutable state; this is an error in the Swift 6 language mode
 68 |
 69 | /// Handles logging from top level functions
 70 | open class Log {
    |            `- note: class 'Log' does not conform to the 'Sendable' protocol
 71 |
 72 |     /// Logging Mode
    :
 82 |
 83 |     /// Singleton
 84 |     public static let shared = Log()
    |                       |- warning: static property 'shared' is not concurrency-safe because non-'Sendable' type 'Log' may have shared mutable state; this is an error in the Swift 6 language mode
    |                       |- note: add '@MainActor' to make static property 'shared' part of global actor 'MainActor'
    |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 85 |
 86 |     /// Log Delegate
[6/6] Compiling AELog Settings.swift
Build complete! (4.55s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "AELog",
  "name" : "AELog",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "12.0"
    },
    {
      "name" : "macos",
      "version" : "10.10"
    },
    {
      "name" : "tvos",
      "version" : "12.0"
    },
    {
      "name" : "watchos",
      "version" : "3.0"
    }
  ],
  "products" : [
    {
      "name" : "AELog",
      "targets" : [
        "AELog"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "AELogTests",
      "module_type" : "SwiftTarget",
      "name" : "AELogTests",
      "path" : "Tests/AELogTests",
      "sources" : [
        "AELogTests.swift"
      ],
      "target_dependencies" : [
        "AELog"
      ],
      "type" : "test"
    },
    {
      "c99name" : "AELog",
      "module_type" : "SwiftTarget",
      "name" : "AELog",
      "path" : "Sources/AELog",
      "product_memberships" : [
        "AELog"
      ],
      "sources" : [
        "Line.swift",
        "Log.swift",
        "Settings.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.5"
}
Done.