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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 Guaka, reference master (e52eb5), with Swift 6.1 for Linux on 25 Apr 2025 09:17:17 UTC.

Swift 6 data race errors: 2

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4606859-3":/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/nsomar/Guaka.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/nsomar/Guaka
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at e52eb52 Merge pull request #99 from trispo/master
Cloned https://github.com/nsomar/Guaka.git
Revision (git rev-parse @):
e52eb523b152e04fa5dff56bed01e805062ce0ff
SUCCESS checkout https://github.com/nsomar/Guaka.git at master
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/nsomar/Guaka.git
https://github.com/nsomar/Guaka.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
    {
      "identity" : "stringscanner",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "0.0.0",
            "upper_bound" : "1.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/getGuaka/StringScanner.git"
    }
  ],
  "manifest_display_name" : "Guaka",
  "name" : "Guaka",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Guaka",
      "targets" : [
        "Guaka"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "4",
    "4.2",
    "5"
  ],
  "targets" : [
    {
      "c99name" : "GuakaTests",
      "module_type" : "SwiftTarget",
      "name" : "GuakaTests",
      "path" : "Tests/GuakaTests",
      "sources" : [
        "ArgTokenTypeTests.swift",
        "CommandExecutionTests.swift",
        "CommandHelpTests.swift",
        "CommandParsingTests.swift",
        "CommandTests.swift",
        "CommandType+Run.swift",
        "CommandTypeTest.swift",
        "CustomFlagTypesTests.swift",
        "ErrorsTests.swift",
        "FlagHelpTests.swift",
        "FlagSetTests.swift",
        "FlagTests.swift",
        "FlagsTests.swift",
        "HelpGeneratorSubclassingTests.swift",
        "HelpGeneratorTests.swift",
        "HelpTests.swift",
        "LevenshteinTests.swift",
        "ParsingTests.swift",
        "TestHelpers.swift",
        "ValidationTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "Guaka"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Guaka",
      "module_type" : "SwiftTarget",
      "name" : "Guaka",
      "path" : "Sources/Guaka",
      "product_dependencies" : [
        "StringScanner"
      ],
      "product_memberships" : [
        "Guaka"
      ],
      "sources" : [
        "Command/Command+Execution.swift",
        "Command/Command+Utilities.swift",
        "Command/Command.swift",
        "Command/CommandTypes.swift",
        "Execution/CommandExecution.swift",
        "Flag/Flag+Utilities.swift",
        "Flag/Flag.swift",
        "Flag/FlagSet.swift",
        "Flag/Flags.swift",
        "Help/CommandHelp.swift",
        "Help/DefaultHelpGenerator.swift",
        "Help/FlagHelp.swift",
        "Help/FlagHelpGeneratorUtils.swift",
        "Help/HelpGenerator.swift",
        "Help/HelpGeneratorDefaults.swift",
        "Help/HelpGeneratorErrors.swift",
        "Misc/GuakaConfig.swift",
        "Misc/Levenshtein.swift",
        "Parsing/ArgTokenType.swift",
        "Parsing/Command+Parsing.swift",
        "Parsing/FlagSet+Parsing.swift",
        "Types/Errors.swift",
        "Types/FlagValue.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.2"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-3":/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
Fetching https://github.com/getGuaka/StringScanner.git
[1/188] Fetching stringscanner
Fetched https://github.com/getGuaka/StringScanner.git from cache (0.26s)
Computing version for https://github.com/getGuaka/StringScanner.git
Computed https://github.com/getGuaka/StringScanner.git at 0.4.1 (2.88s)
Creating working copy for https://github.com/getGuaka/StringScanner.git
Working copy of https://github.com/getGuaka/StringScanner.git resolved at 0.4.1
Building for debugging...
[0/3] Write sources
[2/3] Write swift-version-24593BA9C3E375BF.txt
[4/9] Compiling StringScanner ScannerResult.swift
[5/9] Compiling StringScanner StringExtension.swift
[6/9] Compiling StringScanner StringScanner.swift
[7/9] Compiling StringScanner CharacterSet.swift
[8/9] Emitting module StringScanner
[9/9] Compiling StringScanner Regex.swift
[11/32] Compiling Guaka CommandHelp.swift
[12/32] Compiling Guaka DefaultHelpGenerator.swift
[13/32] Compiling Guaka FlagHelp.swift
[14/34] Emitting module Guaka
/host/spi-builder-workspace/Sources/Guaka/Misc/GuakaConfig.swift:78:21: warning: static property 'helpGenerator' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
76 |   /// ```
77 |   ///
78 |   public static var helpGenerator: HelpGenerator.Type = DefaultHelpGenerator.self
   |                     |- warning: static property 'helpGenerator' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                     |- note: convert 'helpGenerator' to a 'let' constant to make 'Sendable' shared state immutable
   |                     |- note: add '@MainActor' to make static property 'helpGenerator' part of global actor 'MainActor'
   |                     `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
79 | }
80 |
/host/spi-builder-workspace/Sources/Guaka/Types/Errors.swift:41:8: warning: associated value 'commandGeneralError' of 'Sendable'-conforming enum 'CommandError' has non-sendable type 'Command'; this is an error in the Swift 6 language mode
39 |
40 |   /// general command related error
41 |   case commandGeneralError(Command, Error)
   |        `- warning: associated value 'commandGeneralError' of 'Sendable'-conforming enum 'CommandError' has non-sendable type 'Command'; this is an error in the Swift 6 language mode
42 |
43 |   /// unknown error occured
/host/spi-builder-workspace/Sources/Guaka/Command/Command.swift:71:14: note: class 'Command' does not conform to the 'Sendable' protocol
 69 | /// ```
 70 | ///
 71 | public class Command {
    |              `- note: class 'Command' does not conform to the 'Sendable' protocol
 72 |
 73 |
[15/34] Compiling Guaka Command+Execution.swift
[16/34] Compiling Guaka Command+Utilities.swift
[17/34] Compiling Guaka Command.swift
[18/34] Compiling Guaka Errors.swift
/host/spi-builder-workspace/Sources/Guaka/Types/Errors.swift:41:8: warning: associated value 'commandGeneralError' of 'Sendable'-conforming enum 'CommandError' has non-sendable type 'Command'; this is an error in the Swift 6 language mode
39 |
40 |   /// general command related error
41 |   case commandGeneralError(Command, Error)
   |        `- warning: associated value 'commandGeneralError' of 'Sendable'-conforming enum 'CommandError' has non-sendable type 'Command'; this is an error in the Swift 6 language mode
42 |
43 |   /// unknown error occured
/host/spi-builder-workspace/Sources/Guaka/Command/Command.swift:71:14: note: class 'Command' does not conform to the 'Sendable' protocol
 69 | /// ```
 70 | ///
 71 | public class Command {
    |              `- note: class 'Command' does not conform to the 'Sendable' protocol
 72 |
 73 |
[19/34] Compiling Guaka FlagValue.swift
/host/spi-builder-workspace/Sources/Guaka/Types/Errors.swift:41:8: warning: associated value 'commandGeneralError' of 'Sendable'-conforming enum 'CommandError' has non-sendable type 'Command'; this is an error in the Swift 6 language mode
39 |
40 |   /// general command related error
41 |   case commandGeneralError(Command, Error)
   |        `- warning: associated value 'commandGeneralError' of 'Sendable'-conforming enum 'CommandError' has non-sendable type 'Command'; this is an error in the Swift 6 language mode
42 |
43 |   /// unknown error occured
/host/spi-builder-workspace/Sources/Guaka/Command/Command.swift:71:14: note: class 'Command' does not conform to the 'Sendable' protocol
 69 | /// ```
 70 | ///
 71 | public class Command {
    |              `- note: class 'Command' does not conform to the 'Sendable' protocol
 72 |
 73 |
[20/34] Compiling Guaka ArgTokenType.swift
[21/34] Compiling Guaka Command+Parsing.swift
[22/34] Compiling Guaka FlagSet+Parsing.swift
[23/34] Compiling Guaka Flag.swift
[24/34] Compiling Guaka FlagSet.swift
[25/34] Compiling Guaka Flags.swift
[26/34] Compiling Guaka FlagHelpGeneratorUtils.swift
[27/34] Compiling Guaka HelpGenerator.swift
[28/34] Compiling Guaka HelpGeneratorDefaults.swift
[29/34] Compiling Guaka HelpGeneratorErrors.swift
/host/spi-builder-workspace/Sources/Guaka/Misc/GuakaConfig.swift:78:21: warning: static property 'helpGenerator' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
76 |   /// ```
77 |   ///
78 |   public static var helpGenerator: HelpGenerator.Type = DefaultHelpGenerator.self
   |                     |- warning: static property 'helpGenerator' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                     |- note: convert 'helpGenerator' to a 'let' constant to make 'Sendable' shared state immutable
   |                     |- note: add '@MainActor' to make static property 'helpGenerator' part of global actor 'MainActor'
   |                     `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
79 | }
80 |
[30/34] Compiling Guaka GuakaConfig.swift
/host/spi-builder-workspace/Sources/Guaka/Misc/GuakaConfig.swift:78:21: warning: static property 'helpGenerator' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
76 |   /// ```
77 |   ///
78 |   public static var helpGenerator: HelpGenerator.Type = DefaultHelpGenerator.self
   |                     |- warning: static property 'helpGenerator' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                     |- note: convert 'helpGenerator' to a 'let' constant to make 'Sendable' shared state immutable
   |                     |- note: add '@MainActor' to make static property 'helpGenerator' part of global actor 'MainActor'
   |                     `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
79 | }
80 |
[31/34] Compiling Guaka Levenshtein.swift
/host/spi-builder-workspace/Sources/Guaka/Misc/GuakaConfig.swift:78:21: warning: static property 'helpGenerator' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
76 |   /// ```
77 |   ///
78 |   public static var helpGenerator: HelpGenerator.Type = DefaultHelpGenerator.self
   |                     |- warning: static property 'helpGenerator' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                     |- note: convert 'helpGenerator' to a 'let' constant to make 'Sendable' shared state immutable
   |                     |- note: add '@MainActor' to make static property 'helpGenerator' part of global actor 'MainActor'
   |                     `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
79 | }
80 |
[32/34] Compiling Guaka CommandTypes.swift
[33/34] Compiling Guaka CommandExecution.swift
[34/34] Compiling Guaka Flag+Utilities.swift
Build complete! (11.68s)
Build complete.
{
  "dependencies" : [
    {
      "identity" : "stringscanner",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "0.0.0",
            "upper_bound" : "1.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/getGuaka/StringScanner.git"
    }
  ],
  "manifest_display_name" : "Guaka",
  "name" : "Guaka",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Guaka",
      "targets" : [
        "Guaka"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "4",
    "4.2",
    "5"
  ],
  "targets" : [
    {
      "c99name" : "GuakaTests",
      "module_type" : "SwiftTarget",
      "name" : "GuakaTests",
      "path" : "Tests/GuakaTests",
      "sources" : [
        "ArgTokenTypeTests.swift",
        "CommandExecutionTests.swift",
        "CommandHelpTests.swift",
        "CommandParsingTests.swift",
        "CommandTests.swift",
        "CommandType+Run.swift",
        "CommandTypeTest.swift",
        "CustomFlagTypesTests.swift",
        "ErrorsTests.swift",
        "FlagHelpTests.swift",
        "FlagSetTests.swift",
        "FlagTests.swift",
        "FlagsTests.swift",
        "HelpGeneratorSubclassingTests.swift",
        "HelpGeneratorTests.swift",
        "HelpTests.swift",
        "LevenshteinTests.swift",
        "ParsingTests.swift",
        "TestHelpers.swift",
        "ValidationTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "Guaka"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Guaka",
      "module_type" : "SwiftTarget",
      "name" : "Guaka",
      "path" : "Sources/Guaka",
      "product_dependencies" : [
        "StringScanner"
      ],
      "product_memberships" : [
        "Guaka"
      ],
      "sources" : [
        "Command/Command+Execution.swift",
        "Command/Command+Utilities.swift",
        "Command/Command.swift",
        "Command/CommandTypes.swift",
        "Execution/CommandExecution.swift",
        "Flag/Flag+Utilities.swift",
        "Flag/Flag.swift",
        "Flag/FlagSet.swift",
        "Flag/Flags.swift",
        "Help/CommandHelp.swift",
        "Help/DefaultHelpGenerator.swift",
        "Help/FlagHelp.swift",
        "Help/FlagHelpGeneratorUtils.swift",
        "Help/HelpGenerator.swift",
        "Help/HelpGeneratorDefaults.swift",
        "Help/HelpGeneratorErrors.swift",
        "Misc/GuakaConfig.swift",
        "Misc/Levenshtein.swift",
        "Parsing/ArgTokenType.swift",
        "Parsing/Command+Parsing.swift",
        "Parsing/FlagSet+Parsing.swift",
        "Types/Errors.swift",
        "Types/FlagValue.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.2"
}
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.