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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

Failed to build AELog, reference master (42e29e), with Swift 6.1 for Linux on 26 Apr 2025 21:40:24 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4606859-2":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.1-latest swift build --triple x86_64-unknown-linux-gnu 2>&1

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 /host/spi-builder-workspace/.git/
hint: Using 'master' as the name for the initial branch. This default branch name
hint: is subject to change. To configure the initial branch name to use in all
hint: of your new repositories, which will suppress this warning, call:
hint:
hint: 	git config --global init.defaultBranch <name>
hint:
hint: Names commonly chosen instead of 'master' are 'main', 'trunk' and
hint: 'development'. The just-created branch can be renamed via this command:
hint:
hint: 	git branch -m <name>
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
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/tadija/AELog.git
https://github.com/tadija/AELog.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "AELog",
  "name" : "AELog",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "12.0"
    },
    {
      "name" : "macos",
      "version" : "10.10"
    },
    {
      "name" : "tvos",
      "version" : "12.0"
    },
    {
      "name" : "watchos",
      "version" : "3.0"
    }
  ],
  "products" : [
    {
      "name" : "AELog",
      "targets" : [
        "AELog"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "AELogTests",
      "module_type" : "SwiftTarget",
      "name" : "AELogTests",
      "path" : "Tests/AELogTests",
      "sources" : [
        "AELogTests.swift"
      ],
      "target_dependencies" : [
        "AELog"
      ],
      "type" : "test"
    },
    {
      "c99name" : "AELog",
      "module_type" : "SwiftTarget",
      "name" : "AELog",
      "path" : "Sources/AELog",
      "product_memberships" : [
        "AELog"
      ],
      "sources" : [
        "Line.swift",
        "Log.swift",
        "Settings.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.5"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-2":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.1-latest swift build --triple x86_64-unknown-linux-gnu -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 2>&1
basic-6.1-latest: Pulling from finestructure/spi-images
Digest: sha256:3bdcac04179f4ed3e5b8e9dbd6e74bbf5ebc0f4fde48bbaad7d1e5c757e65bcb
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-6.1-latest
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-24593BA9C3E375BF.txt
[3/6] Compiling AELog Settings.swift
[4/6] Emitting module AELog
/host/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
[5/6] Compiling AELog Log.swift
/host/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
/host/spi-builder-workspace/Sources/AELog/Log.swift:115:19: warning: capture of 'self' with non-sendable type 'Log' in a '@Sendable' closure; 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
    :
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; this is an error in the Swift 6 language mode
116 |                 return
117 |             }
/host/spi-builder-workspace/Sources/AELog/Log.swift:115:46: warning: capture of 'mode' with non-sendable type 'Log.Mode' in a '@Sendable' closure; 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: capture of 'mode' with non-sendable type 'Log.Mode' in a '@Sendable' closure; this is an error in the Swift 6 language mode
116 |                 return
117 |             }
/host/spi-builder-workspace/Sources/AELog/Log.swift:121:29: warning: capture of 'thread' with non-sendable type 'Thread' in a '@Sendable' closure; this is an error in the Swift 6 language mode
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; this is an error in the Swift 6 language mode
122 |                     file: name,
123 |                     number: lineNumber,
Foundation.Thread:1:12: note: class 'Thread' does not conform to the 'Sendable' protocol
 1 | open class Thread : NSObject {
   |            `- note: class 'Thread' does not conform to the 'Sendable' protocol
 2 |     @available(*, noasync)
 3 |     open class var current: Thread { get }
/host/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 |             }
/host/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,
[6/6] Compiling AELog Line.swift
/host/spi-builder-workspace/Sources/AELog/Line.swift:38:40: error: argument type 'Thread' does not conform to expected type 'CVarArg'
36 |             return name
37 |         } else {
38 |             return String(format:"%p", thread)
   |                                        `- error: argument type 'Thread' does not conform to expected type 'CVarArg'
39 |         }
40 |     }
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-2":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.1-latest swift build --triple x86_64-unknown-linux-gnu 2>&1
basic-6.1-latest: Pulling from finestructure/spi-images
Digest: sha256:3bdcac04179f4ed3e5b8e9dbd6e74bbf5ebc0f4fde48bbaad7d1e5c757e65bcb
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-6.1-latest
[0/1] Planning build
Building for debugging...
[0/1] Write swift-version-24593BA9C3E375BF.txt
[2/5] Compiling AELog Settings.swift
[3/5] Emitting module AELog
[4/5] Compiling AELog Log.swift
/host/spi-builder-workspace/Sources/AELog/Log.swift:121:29: warning: capture of 'thread' with non-sendable type 'Thread' in a '@Sendable' closure; this is an error in the Swift 6 language mode
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; this is an error in the Swift 6 language mode
122 |                     file: name,
123 |                     number: lineNumber,
Foundation.Thread:1:12: note: class 'Thread' does not conform to the 'Sendable' protocol
 1 | open class Thread : NSObject {
   |            `- note: class 'Thread' does not conform to the 'Sendable' protocol
 2 |     @available(*, noasync)
 3 |     open class var current: Thread { get }
[5/5] Compiling AELog Line.swift
/host/spi-builder-workspace/Sources/AELog/Line.swift:38:40: error: argument type 'Thread' does not conform to expected type 'CVarArg'
36 |             return name
37 |         } else {
38 |             return String(format:"%p", thread)
   |                                        `- error: argument type 'Thread' does not conform to expected type 'CVarArg'
39 |         }
40 |     }
BUILD FAILURE 6.1 linux