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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 Prompt, reference 0.1.1 (265f92), with Swift 6.1 for macOS (SPM) on 25 Apr 2025 00:15:20 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/getGuaka/Prompt.git
Reference: 0.1.1
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/getGuaka/Prompt
 * tag               0.1.1      -> FETCH_HEAD
HEAD is now at 265f929 Make PromptPrinter and PromptReader public
Cloned https://github.com/getGuaka/Prompt.git
Revision (git rev-parse @):
265f929fda31c59d7dc5f1c674fd435e41dd9881
SUCCESS checkout https://github.com/getGuaka/Prompt.git at 0.1.1
Fetching https://github.com/Quick/Quick.git
Fetching https://github.com/getGuaka/Args.git
Fetching https://github.com/Quick/Nimble.git
[1/34] Fetching args
[35/14789] Fetching args, quick
[331/34356] Fetching args, quick, nimble
Fetched https://github.com/Quick/Nimble.git from cache (1.71s)
Fetched https://github.com/Quick/Quick.git from cache (1.71s)
Fetched https://github.com/getGuaka/Args.git from cache (1.71s)
Computing version for https://github.com/Quick/Nimble.git
Computed https://github.com/Quick/Nimble.git at 7.3.1 (2.36s)
Computing version for https://github.com/Quick/Quick.git
Computed https://github.com/Quick/Quick.git at 1.3.2 (0.60s)
Computing version for https://github.com/getGuaka/Args.git
Computed https://github.com/getGuaka/Args.git at 0.1.0 (0.55s)
Creating working copy for https://github.com/Quick/Nimble.git
Working copy of https://github.com/Quick/Nimble.git resolved at 7.3.1
Creating working copy for https://github.com/getGuaka/Args.git
Working copy of https://github.com/getGuaka/Args.git resolved at 0.1.0
Creating working copy for https://github.com/Quick/Quick.git
Working copy of https://github.com/Quick/Quick.git resolved at 1.3.2
========================================
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": "prompt",
      "name": "Prompt",
      "url": "https://github.com/getGuaka/Prompt.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Prompt",
      "dependencies": [
        {
          "identity": "args",
          "name": "Args",
          "url": "https://github.com/getGuaka/Args.git",
          "version": "0.1.1",
          "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Args",
          "dependencies": [
            {
              "identity": "quick",
              "name": "Quick",
              "url": "https://github.com/Quick/Quick.git",
              "version": "1.3.4",
              "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Quick",
              "dependencies": [
                {
                  "identity": "nimble",
                  "name": "Nimble",
                  "url": "https://github.com/Quick/Nimble.git",
                  "version": "7.3.4",
                  "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Nimble",
                  "dependencies": [
                  ]
                }
              ]
            },
            {
              "identity": "nimble",
              "name": "Nimble",
              "url": "https://github.com/Quick/Nimble.git",
              "version": "7.3.4",
              "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Nimble",
              "dependencies": [
              ]
            }
          ]
        },
        {
          "identity": "quick",
          "name": "Quick",
          "url": "https://github.com/Quick/Quick.git",
          "version": "1.3.4",
          "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Quick",
          "dependencies": [
            {
              "identity": "nimble",
              "name": "Nimble",
              "url": "https://github.com/Quick/Nimble.git",
              "version": "7.3.4",
              "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Nimble",
              "dependencies": [
              ]
            }
          ]
        },
        {
          "identity": "nimble",
          "name": "Nimble",
          "url": "https://github.com/Quick/Nimble.git",
          "version": "7.3.4",
          "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Nimble",
          "dependencies": [
          ]
        }
      ]
    }
  ]
}
Fetching https://github.com/getGuaka/Prompt.git
[1/44] Fetching prompt
Fetched https://github.com/getGuaka/Prompt.git from cache (0.57s)
Fetching https://github.com/getGuaka/Args.git from cache
Fetching https://github.com/Quick/Quick.git from cache
Fetching https://github.com/Quick/Nimble.git from cache
Fetched https://github.com/Quick/Nimble.git from cache (0.56s)
Fetched https://github.com/Quick/Quick.git from cache (0.56s)
Fetched https://github.com/getGuaka/Args.git from cache (0.56s)
Computing version for https://github.com/getGuaka/Args.git
Computed https://github.com/getGuaka/Args.git at 0.1.1 (0.62s)
Computing version for https://github.com/Quick/Quick.git
Computed https://github.com/Quick/Quick.git at 1.3.4 (0.61s)
Computing version for https://github.com/Quick/Nimble.git
Computed https://github.com/Quick/Nimble.git at 7.3.4 (0.04s)
Creating working copy for https://github.com/Quick/Nimble.git
Working copy of https://github.com/Quick/Nimble.git resolved at 7.3.4
Creating working copy for https://github.com/getGuaka/Prompt.git
Working copy of https://github.com/getGuaka/Prompt.git resolved at 0.1.1 (265f929)
Creating working copy for https://github.com/Quick/Quick.git
Working copy of https://github.com/Quick/Quick.git resolved at 1.3.4
Creating working copy for https://github.com/getGuaka/Args.git
Working copy of https://github.com/getGuaka/Args.git resolved at 0.1.1
warning: '.resolve-product-dependencies': dependency 'prompt' is not used by any target
Found 3 product dependencies
  - Args
  - Quick
  - Nimble
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/getGuaka/Prompt.git
https://github.com/getGuaka/Prompt.git
{
  "dependencies" : [
    {
      "identity" : "args",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "0.1.0",
            "upper_bound" : "1.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/getGuaka/Args.git"
    },
    {
      "identity" : "quick",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.3.1",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/Quick/Quick.git"
    },
    {
      "identity" : "nimble",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "7.3.0",
            "upper_bound" : "8.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/Quick/Nimble.git"
    }
  ],
  "manifest_display_name" : "Prompt",
  "name" : "Prompt",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Prompt",
      "targets" : [
        "Prompt"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "PromptTests",
      "module_type" : "SwiftTarget",
      "name" : "PromptTests",
      "path" : "Tests/PromptTests",
      "product_dependencies" : [
        "Nimble",
        "Quick"
      ],
      "sources" : [
        "AgreeSettingsTest.swift",
        "AgreeTests.swift",
        "AskSettingsTests.swift",
        "AskTests.swift",
        "ChooseSettingsTests.swift",
        "ChooseTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "Prompt"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Prompt",
      "module_type" : "SwiftTarget",
      "name" : "Prompt",
      "path" : "Sources/Prompt",
      "product_dependencies" : [
        "Args"
      ],
      "product_memberships" : [
        "Prompt"
      ],
      "sources" : [
        "Agree.swift",
        "AgreeSettings.swift",
        "Ask.swift",
        "AskSettings.swift",
        "AskerValidator.swift",
        "Choose.swift",
        "ChooseSettings.swift",
        "PromptPrinter.swift",
        "PromptReader.swift",
        "PromptSettings.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...
[0/3] Write sources
[2/3] Write swift-version-2F0A5646E1D333AE.txt
[4/9] Compiling Args Argument.swift
[5/9] Compiling Args ProcessInfo.swift
[6/9] Compiling Args ArgConvertible.swift
[7/9] Compiling Args ArgsParser.swift
[8/9] Emitting module Args
[9/9] Compiling Args Args.swift
[10/19] Compiling Prompt AskerValidator.swift
[11/19] Compiling Prompt PromptPrinter.swift
[12/19] Compiling Prompt PromptReader.swift
[13/19] Compiling Prompt Choose.swift
[14/20] Compiling Prompt AskSettings.swift
[15/20] Compiling Prompt Ask.swift
[16/20] Compiling Prompt Agree.swift
[17/20] Compiling Prompt ChooseSettings.swift
[18/20] Compiling Prompt AgreeSettings.swift
[19/20] Emitting module Prompt
/Users/admin/builder/spi-builder-workspace/Sources/Prompt/PromptSettings.swift:12:23: warning: static property 'reader' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
10 | public class PromptSettings {
11 |
12 |     public static var reader: PromptReader = ConsolePromptReader()
   |                       |- warning: static property 'reader' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: convert 'reader' to a 'let' constant to make 'Sendable' shared state immutable
   |                       |- note: add '@MainActor' to make static property 'reader' part of global actor 'MainActor'
   |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
13 |     public static var printer: PromptPrinter = ConsolePromptPrinter()
14 |
/Users/admin/builder/spi-builder-workspace/Sources/Prompt/PromptSettings.swift:13:23: warning: static property 'printer' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
11 |
12 |     public static var reader: PromptReader = ConsolePromptReader()
13 |     public static var printer: PromptPrinter = ConsolePromptPrinter()
   |                       |- warning: static property 'printer' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: convert 'printer' to a 'let' constant to make 'Sendable' shared state immutable
   |                       |- note: add '@MainActor' to make static property 'printer' part of global actor 'MainActor'
   |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
14 |
15 |     public class func read() -> String? {
[20/20] Compiling Prompt PromptSettings.swift
/Users/admin/builder/spi-builder-workspace/Sources/Prompt/PromptSettings.swift:12:23: warning: static property 'reader' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
10 | public class PromptSettings {
11 |
12 |     public static var reader: PromptReader = ConsolePromptReader()
   |                       |- warning: static property 'reader' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: convert 'reader' to a 'let' constant to make 'Sendable' shared state immutable
   |                       |- note: add '@MainActor' to make static property 'reader' part of global actor 'MainActor'
   |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
13 |     public static var printer: PromptPrinter = ConsolePromptPrinter()
14 |
/Users/admin/builder/spi-builder-workspace/Sources/Prompt/PromptSettings.swift:13:23: warning: static property 'printer' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
11 |
12 |     public static var reader: PromptReader = ConsolePromptReader()
13 |     public static var printer: PromptPrinter = ConsolePromptPrinter()
   |                       |- warning: static property 'printer' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: convert 'printer' to a 'let' constant to make 'Sendable' shared state immutable
   |                       |- note: add '@MainActor' to make static property 'printer' part of global actor 'MainActor'
   |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
14 |
15 |     public class func read() -> String? {
Build complete! (6.33s)
Build complete.
{
  "dependencies" : [
    {
      "identity" : "args",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "0.1.0",
            "upper_bound" : "1.0.0"
          }
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      },
      "type" : "sourceControl",
      "url" : "https://github.com/getGuaka/Args.git"
    },
    {
      "identity" : "quick",
      "requirement" : {
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            "upper_bound" : "2.0.0"
          }
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      },
      "type" : "sourceControl",
      "url" : "https://github.com/Quick/Quick.git"
    },
    {
      "identity" : "nimble",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "7.3.0",
            "upper_bound" : "8.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/Quick/Nimble.git"
    }
  ],
  "manifest_display_name" : "Prompt",
  "name" : "Prompt",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Prompt",
      "targets" : [
        "Prompt"
      ],
      "type" : {
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          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "PromptTests",
      "module_type" : "SwiftTarget",
      "name" : "PromptTests",
      "path" : "Tests/PromptTests",
      "product_dependencies" : [
        "Nimble",
        "Quick"
      ],
      "sources" : [
        "AgreeSettingsTest.swift",
        "AgreeTests.swift",
        "AskSettingsTests.swift",
        "AskTests.swift",
        "ChooseSettingsTests.swift",
        "ChooseTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "Prompt"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Prompt",
      "module_type" : "SwiftTarget",
      "name" : "Prompt",
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      "product_dependencies" : [
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      ],
      "product_memberships" : [
        "Prompt"
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        "AgreeSettings.swift",
        "Ask.swift",
        "AskSettings.swift",
        "AskerValidator.swift",
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        "PromptPrinter.swift",
        "PromptReader.swift",
        "PromptSettings.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.0"
}
Done.