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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 Rainbow, reference 4.1.0 (0c627a), with Swift 6.1 for macOS (SPM) on 30 Apr 2025 07:35:00 UTC.

Swift 6 data race errors: 4

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: 4.61.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/onevcat/Rainbow.git
Reference: 4.1.0
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/onevcat/Rainbow
 * tag               4.1.0      -> FETCH_HEAD
HEAD is now at 0c627a4 Upgrade project settings
Cloned https://github.com/onevcat/Rainbow.git
Revision (git rev-parse @):
0c627a4f8a39ef37eadec1ceec02e4a7f55561ac
SUCCESS checkout https://github.com/onevcat/Rainbow.git at 4.1.0
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/onevcat/Rainbow.git
https://github.com/onevcat/Rainbow.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Rainbow",
  "name" : "Rainbow",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Rainbow",
      "targets" : [
        "Rainbow"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "RainbowPlayground",
      "targets" : [
        "RainbowPlayground"
      ],
      "type" : {
        "executable" : null
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "RainbowTests",
      "module_type" : "SwiftTarget",
      "name" : "RainbowTests",
      "path" : "Tests",
      "sources" : [
        "RainbowTests/ColorApproximatedTests.swift",
        "RainbowTests/ColorTests.swift",
        "RainbowTests/ConsoleStringTests.swift",
        "RainbowTests/ConsoleTextParserTests.swift",
        "RainbowTests/RainbowTests.swift"
      ],
      "target_dependencies" : [
        "Rainbow"
      ],
      "type" : "test"
    },
    {
      "c99name" : "RainbowPlayground",
      "module_type" : "SwiftTarget",
      "name" : "RainbowPlayground",
      "path" : "Playground",
      "product_memberships" : [
        "RainbowPlayground"
      ],
      "sources" : [
        "main.swift"
      ],
      "target_dependencies" : [
        "Rainbow"
      ],
      "type" : "executable"
    },
    {
      "c99name" : "Rainbow",
      "module_type" : "SwiftTarget",
      "name" : "Rainbow",
      "path" : "Sources",
      "product_memberships" : [
        "Rainbow",
        "RainbowPlayground"
      ],
      "sources" : [
        "BackgroundColor.swift",
        "CodesParser.swift",
        "Color.swift",
        "ColorApproximation.swift",
        "ControlCode.swift",
        "ModesExtractor.swift",
        "OutputTarget.swift",
        "Rainbow.swift",
        "String+Rainbow.swift",
        "StringGenerator.swift",
        "Style.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.0"
}
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...
[0/7] Write sources
[1/7] Write RainbowPlayground-entitlement.plist
[2/7] Write sources
[3/7] Write swift-version-2F0A5646E1D333AE.txt
[5/18] Emitting module Rainbow
/Users/admin/builder/spi-builder-workspace/Sources/OutputTarget.swift:46:16: warning: static property 'current' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
44 |
45 |     /// Detected output target by current environment.
46 |     static var current: OutputTarget = {
   |                |- warning: static property 'current' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                |- note: convert 'current' to a 'let' constant to make 'Sendable' shared state immutable
   |                |- note: add '@MainActor' to make static property 'current' part of global actor 'MainActor'
   |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
47 |         // Check if we are in any term env and the output is a tty.
48 |         let termType = getEnvValue("TERM")
/Users/admin/builder/spi-builder-workspace/Sources/Rainbow.swift:98:23: warning: static property 'outputTarget' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 96 |     /// Output target for `Rainbow`. `Rainbow` should detect correct target itself, so you rarely need to set it.
 97 |     /// However, if you want the colorized string to be different, or the detection is not correct, you can set it manually.
 98 |     public static var outputTarget = OutputTarget.current
    |                       |- warning: static property 'outputTarget' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |                       |- note: convert 'outputTarget' to a 'let' constant to make 'Sendable' shared state immutable
    |                       |- note: add '@MainActor' to make static property 'outputTarget' part of global actor 'MainActor'
    |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 99 |
100 |     static var environment = ProcessInfo.processInfo.environment
/Users/admin/builder/spi-builder-workspace/Sources/Rainbow.swift:100:16: warning: static property 'environment' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 98 |     public static var outputTarget = OutputTarget.current
 99 |
100 |     static var environment = ProcessInfo.processInfo.environment
    |                |- warning: static property 'environment' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |                |- note: convert 'environment' to a 'let' constant to make 'Sendable' shared state immutable
    |                |- note: add '@MainActor' to make static property 'environment' part of global actor 'MainActor'
    |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
101 |     static func hasValidValueInEnvironment(_ key: String) -> Bool {
102 |         guard !key.isEmpty, let value = environment[key] else {
/Users/admin/builder/spi-builder-workspace/Sources/Rainbow.swift:121:23: warning: static property 'enabled' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
119 |     /// set and `FORCE_COLOR` not set to a valid value ("0" or empty value is treated as "unset". `FORCE_COLOR` has
120 |     /// higher priority than `NO_COLOR` if set).
121 |     public static var enabled = environmentAvailable
    |                       |- warning: static property 'enabled' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |                       |- note: convert 'enabled' to a 'let' constant to make 'Sendable' shared state immutable
    |                       |- note: add '@MainActor' to make static property 'enabled' part of global actor 'MainActor'
    |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
122 |
123 |     public static func extractEntry(for string: String) -> Entry {
[6/19] Compiling Rainbow Style.swift
[7/19] Compiling Rainbow String+Rainbow.swift
[8/19] Compiling Rainbow ControlCode.swift
[9/19] Compiling Rainbow OutputTarget.swift
/Users/admin/builder/spi-builder-workspace/Sources/OutputTarget.swift:46:16: warning: static property 'current' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
44 |
45 |     /// Detected output target by current environment.
46 |     static var current: OutputTarget = {
   |                |- warning: static property 'current' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                |- note: convert 'current' to a 'let' constant to make 'Sendable' shared state immutable
   |                |- note: add '@MainActor' to make static property 'current' part of global actor 'MainActor'
   |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
47 |         // Check if we are in any term env and the output is a tty.
48 |         let termType = getEnvValue("TERM")
[10/19] Compiling Rainbow StringGenerator.swift
[11/19] Compiling Rainbow ColorApproximation.swift
[12/19] Compiling Rainbow ModesExtractor.swift
[13/19] Compiling Rainbow Color.swift
[14/19] Compiling Rainbow Rainbow.swift
/Users/admin/builder/spi-builder-workspace/Sources/Rainbow.swift:98:23: warning: static property 'outputTarget' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 96 |     /// Output target for `Rainbow`. `Rainbow` should detect correct target itself, so you rarely need to set it.
 97 |     /// However, if you want the colorized string to be different, or the detection is not correct, you can set it manually.
 98 |     public static var outputTarget = OutputTarget.current
    |                       |- warning: static property 'outputTarget' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |                       |- note: convert 'outputTarget' to a 'let' constant to make 'Sendable' shared state immutable
    |                       |- note: add '@MainActor' to make static property 'outputTarget' part of global actor 'MainActor'
    |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 99 |
100 |     static var environment = ProcessInfo.processInfo.environment
/Users/admin/builder/spi-builder-workspace/Sources/Rainbow.swift:100:16: warning: static property 'environment' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 98 |     public static var outputTarget = OutputTarget.current
 99 |
100 |     static var environment = ProcessInfo.processInfo.environment
    |                |- warning: static property 'environment' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |                |- note: convert 'environment' to a 'let' constant to make 'Sendable' shared state immutable
    |                |- note: add '@MainActor' to make static property 'environment' part of global actor 'MainActor'
    |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
101 |     static func hasValidValueInEnvironment(_ key: String) -> Bool {
102 |         guard !key.isEmpty, let value = environment[key] else {
/Users/admin/builder/spi-builder-workspace/Sources/Rainbow.swift:121:23: warning: static property 'enabled' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
119 |     /// set and `FORCE_COLOR` not set to a valid value ("0" or empty value is treated as "unset". `FORCE_COLOR` has
120 |     /// higher priority than `NO_COLOR` if set).
121 |     public static var enabled = environmentAvailable
    |                       |- warning: static property 'enabled' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |                       |- note: convert 'enabled' to a 'let' constant to make 'Sendable' shared state immutable
    |                       |- note: add '@MainActor' to make static property 'enabled' part of global actor 'MainActor'
    |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
122 |
123 |     public static func extractEntry(for string: String) -> Entry {
[15/19] Compiling Rainbow BackgroundColor.swift
[16/19] Compiling Rainbow CodesParser.swift
[17/21] Compiling RainbowPlayground main.swift
[18/21] Emitting module RainbowPlayground
[18/21] Write Objects.LinkFileList
[19/21] Linking RainbowPlayground
[20/21] Applying RainbowPlayground
Build complete! (5.47s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Rainbow",
  "name" : "Rainbow",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Rainbow",
      "targets" : [
        "Rainbow"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "RainbowPlayground",
      "targets" : [
        "RainbowPlayground"
      ],
      "type" : {
        "executable" : null
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "RainbowTests",
      "module_type" : "SwiftTarget",
      "name" : "RainbowTests",
      "path" : "Tests",
      "sources" : [
        "RainbowTests/ColorApproximatedTests.swift",
        "RainbowTests/ColorTests.swift",
        "RainbowTests/ConsoleStringTests.swift",
        "RainbowTests/ConsoleTextParserTests.swift",
        "RainbowTests/RainbowTests.swift"
      ],
      "target_dependencies" : [
        "Rainbow"
      ],
      "type" : "test"
    },
    {
      "c99name" : "RainbowPlayground",
      "module_type" : "SwiftTarget",
      "name" : "RainbowPlayground",
      "path" : "Playground",
      "product_memberships" : [
        "RainbowPlayground"
      ],
      "sources" : [
        "main.swift"
      ],
      "target_dependencies" : [
        "Rainbow"
      ],
      "type" : "executable"
    },
    {
      "c99name" : "Rainbow",
      "module_type" : "SwiftTarget",
      "name" : "Rainbow",
      "path" : "Sources",
      "product_memberships" : [
        "Rainbow",
        "RainbowPlayground"
      ],
      "sources" : [
        "BackgroundColor.swift",
        "CodesParser.swift",
        "Color.swift",
        "ColorApproximation.swift",
        "ControlCode.swift",
        "ModesExtractor.swift",
        "OutputTarget.swift",
        "Rainbow.swift",
        "String+Rainbow.swift",
        "StringGenerator.swift",
        "Style.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.0"
}
Done.