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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 Docopt, reference 0.6.12 (fe5beb), with Swift 6.1 for Linux on 25 Apr 2025 14:56:59 UTC.

Swift 6 data race errors: 3

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/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

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/elegantchaos/docopt.swift.git
Reference: 0.6.12
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/elegantchaos/docopt.swift
 * tag               0.6.12     -> FETCH_HEAD
HEAD is now at fe5bebd added swiftpm derived xc workspace
Cloned https://github.com/elegantchaos/docopt.swift.git
Revision (git rev-parse @):
fe5bebd9829d1cf56bf062bca70809a09b7144b6
SUCCESS checkout https://github.com/elegantchaos/docopt.swift.git at 0.6.12
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/elegantchaos/docopt.swift.git
https://github.com/elegantchaos/docopt.swift.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Docopt",
  "name" : "Docopt",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Docopt",
      "targets" : [
        "Docopt"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "DocoptTests",
      "module_type" : "SwiftTarget",
      "name" : "DocoptTests",
      "path" : "Tests/DocoptTests",
      "sources" : [
        "DocoptTestCase.swift",
        "DocoptTestCaseParser.swift",
        "DocoptTestCasesTests.swift",
        "DocoptTests.swift",
        "ValueMatching.swift",
        "ValueMatchingTests.swift"
      ],
      "target_dependencies" : [
        "Docopt"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Docopt",
      "module_type" : "SwiftTarget",
      "name" : "Docopt",
      "path" : "Sources/Docopt",
      "product_memberships" : [
        "Docopt"
      ],
      "sources" : [
        "Argument.swift",
        "BranchPattern.swift",
        "Command.swift",
        "Docopt.swift",
        "DocoptError.swift",
        "Either.swift",
        "LeafPattern.swift",
        "OneOrMore.swift",
        "Option.swift",
        "Optional.swift",
        "OptionsShortcut.swift",
        "Pattern.swift",
        "Required.swift",
        "String.swift",
        "Tokens.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.0"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/host -w "$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
[3/17] Compiling Docopt Required.swift
[4/17] Compiling Docopt String.swift
[5/18] Emitting module Docopt
/host/spi-builder-workspace/Sources/Docopt/DocoptError.swift:22:16: warning: static property 'test' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
20 |     var status: DocoptStatus
21 |
22 |     static var test: Bool = false
   |                |- warning: static property 'test' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                |- note: convert 'test' to a 'let' constant to make 'Sendable' shared state immutable
   |                |- note: add '@MainActor' to make static property 'test' part of global actor 'MainActor'
   |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
23 |     static var errorMessage: String?
24 |
/host/spi-builder-workspace/Sources/Docopt/DocoptError.swift:23:16: warning: static property 'errorMessage' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
21 |
22 |     static var test: Bool = false
23 |     static var errorMessage: String?
   |                |- warning: static property 'errorMessage' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                |- note: convert 'errorMessage' to a 'let' constant to make 'Sendable' shared state immutable
   |                |- note: add '@MainActor' to make static property 'errorMessage' part of global actor 'MainActor'
   |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
24 |
25 |     init (_ message: String, name: String, status: DocoptStatus = .unknownError) {
/host/spi-builder-workspace/Sources/Docopt/DocoptError.swift:49:16: warning: static property 'usage' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
47 |
48 | internal class DocoptExit: DocoptError {
49 |     static var usage: String = ""
   |                |- warning: static property 'usage' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                |- note: convert 'usage' to a 'let' constant to make 'Sendable' shared state immutable
   |                |- note: add '@MainActor' to make static property 'usage' part of global actor 'MainActor'
   |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
50 |     init (_ message: String = "Exit in case user invoked program with incorrect arguments.") {
51 |         super.init(message, name: "DocoptExit", status: .incorrectArguments)
[6/18] Compiling Docopt LeafPattern.swift
[7/18] Compiling Docopt OneOrMore.swift
[8/18] Compiling Docopt Option.swift
[9/18] Compiling Docopt Optional.swift
[10/18] Compiling Docopt OptionsShortcut.swift
[11/18] Compiling Docopt Pattern.swift
[12/18] Compiling Docopt DocoptError.swift
/host/spi-builder-workspace/Sources/Docopt/DocoptError.swift:22:16: warning: static property 'test' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
20 |     var status: DocoptStatus
21 |
22 |     static var test: Bool = false
   |                |- warning: static property 'test' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                |- note: convert 'test' to a 'let' constant to make 'Sendable' shared state immutable
   |                |- note: add '@MainActor' to make static property 'test' part of global actor 'MainActor'
   |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
23 |     static var errorMessage: String?
24 |
/host/spi-builder-workspace/Sources/Docopt/DocoptError.swift:23:16: warning: static property 'errorMessage' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
21 |
22 |     static var test: Bool = false
23 |     static var errorMessage: String?
   |                |- warning: static property 'errorMessage' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                |- note: convert 'errorMessage' to a 'let' constant to make 'Sendable' shared state immutable
   |                |- note: add '@MainActor' to make static property 'errorMessage' part of global actor 'MainActor'
   |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
24 |
25 |     init (_ message: String, name: String, status: DocoptStatus = .unknownError) {
/host/spi-builder-workspace/Sources/Docopt/DocoptError.swift:49:16: warning: static property 'usage' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
47 |
48 | internal class DocoptExit: DocoptError {
49 |     static var usage: String = ""
   |                |- warning: static property 'usage' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                |- note: convert 'usage' to a 'let' constant to make 'Sendable' shared state immutable
   |                |- note: add '@MainActor' to make static property 'usage' part of global actor 'MainActor'
   |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
50 |     init (_ message: String = "Exit in case user invoked program with incorrect arguments.") {
51 |         super.init(message, name: "DocoptExit", status: .incorrectArguments)
[13/18] Compiling Docopt Either.swift
/host/spi-builder-workspace/Sources/Docopt/DocoptError.swift:22:16: warning: static property 'test' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
20 |     var status: DocoptStatus
21 |
22 |     static var test: Bool = false
   |                |- warning: static property 'test' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                |- note: convert 'test' to a 'let' constant to make 'Sendable' shared state immutable
   |                |- note: add '@MainActor' to make static property 'test' part of global actor 'MainActor'
   |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
23 |     static var errorMessage: String?
24 |
/host/spi-builder-workspace/Sources/Docopt/DocoptError.swift:23:16: warning: static property 'errorMessage' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
21 |
22 |     static var test: Bool = false
23 |     static var errorMessage: String?
   |                |- warning: static property 'errorMessage' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                |- note: convert 'errorMessage' to a 'let' constant to make 'Sendable' shared state immutable
   |                |- note: add '@MainActor' to make static property 'errorMessage' part of global actor 'MainActor'
   |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
24 |
25 |     init (_ message: String, name: String, status: DocoptStatus = .unknownError) {
/host/spi-builder-workspace/Sources/Docopt/DocoptError.swift:49:16: warning: static property 'usage' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
47 |
48 | internal class DocoptExit: DocoptError {
49 |     static var usage: String = ""
   |                |- warning: static property 'usage' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                |- note: convert 'usage' to a 'let' constant to make 'Sendable' shared state immutable
   |                |- note: add '@MainActor' to make static property 'usage' part of global actor 'MainActor'
   |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
50 |     init (_ message: String = "Exit in case user invoked program with incorrect arguments.") {
51 |         super.init(message, name: "DocoptExit", status: .incorrectArguments)
[14/18] Compiling Docopt Argument.swift
[15/18] Compiling Docopt BranchPattern.swift
[16/18] Compiling Docopt Command.swift
[17/18] Compiling Docopt Docopt.swift
[18/18] Compiling Docopt Tokens.swift
Build complete! (10.03s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Docopt",
  "name" : "Docopt",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Docopt",
      "targets" : [
        "Docopt"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "DocoptTests",
      "module_type" : "SwiftTarget",
      "name" : "DocoptTests",
      "path" : "Tests/DocoptTests",
      "sources" : [
        "DocoptTestCase.swift",
        "DocoptTestCaseParser.swift",
        "DocoptTestCasesTests.swift",
        "DocoptTests.swift",
        "ValueMatching.swift",
        "ValueMatchingTests.swift"
      ],
      "target_dependencies" : [
        "Docopt"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Docopt",
      "module_type" : "SwiftTarget",
      "name" : "Docopt",
      "path" : "Sources/Docopt",
      "product_memberships" : [
        "Docopt"
      ],
      "sources" : [
        "Argument.swift",
        "BranchPattern.swift",
        "Command.swift",
        "Docopt.swift",
        "DocoptError.swift",
        "Either.swift",
        "LeafPattern.swift",
        "OneOrMore.swift",
        "Option.swift",
        "Optional.swift",
        "OptionsShortcut.swift",
        "Pattern.swift",
        "Required.swift",
        "String.swift",
        "Tokens.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.0"
}
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
Done.