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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 Rimuru, reference 1.0.0 (7ed142), with Swift 6.1 for Linux on 25 Apr 2025 19:02:28 UTC.

Swift 6 data race errors: 2

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/funzin/Rimuru.git
Reference: 1.0.0
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/funzin/Rimuru
 * tag               1.0.0      -> FETCH_HEAD
HEAD is now at 7ed1427 Initial Commit
Cloned https://github.com/funzin/Rimuru.git
Revision (git rev-parse @):
7ed1427ecf8c947ca637a47ca25c649868866008
SUCCESS checkout https://github.com/funzin/Rimuru.git at 1.0.0
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/funzin/Rimuru.git
https://github.com/funzin/Rimuru.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
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      "requirement" : {
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            "upper_bound" : "1.0.0"
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      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-argument-parser"
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            "upper_bound" : "1.0.0"
          }
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      "type" : "sourceControl",
      "url" : "https://github.com/realm/SwiftLint"
    }
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  "manifest_display_name" : "Rimuru",
  "name" : "Rimuru",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
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      "targets" : [
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      ],
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    {
      "name" : "RimuruCore",
      "targets" : [
        "RimuruCore"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "RimuruCoreTests",
      "module_type" : "SwiftTarget",
      "name" : "RimuruCoreTests",
      "path" : "Tests/RimuruCoreTests",
      "sources" : [
        "Common/TestCase.swift",
        "NamingConventionConverterTests.swift"
      ],
      "target_dependencies" : [
        "RimuruCore"
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      "module_type" : "SwiftTarget",
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      "sources" : [
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        "NamingConvention.swift",
        "NamingConventionConverter.swift",
        "SplitMeans.swift"
      ],
      "type" : "library"
    },
    {
      "c99name" : "Rimuru",
      "module_type" : "SwiftTarget",
      "name" : "Rimuru",
      "path" : "Sources/Rimuru",
      "product_dependencies" : [
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      "product_memberships" : [
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      "sources" : [
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        "Extension/NamingConventionExtension.swift",
        "main.swift"
      ],
      "target_dependencies" : [
        "RimuruCore"
      ],
      "type" : "executable"
    }
  ],
  "tools_version" : "5.2"
}
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
Fetching https://github.com/apple/swift-argument-parser
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Computing version for https://github.com/apple/swift-argument-parser
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Computed https://github.com/realm/SwiftLint at 0.42.0 (0.93s)
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Computed https://github.com/Quick/Nimble.git at 8.1.2 (0.47s)
Creating working copy for https://github.com/Carthage/Commandant.git
Working copy of https://github.com/Carthage/Commandant.git resolved at 0.17.0
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Working copy of https://github.com/scottrhoyt/SwiftyTextTable.git resolved at 0.9.0
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Working copy of https://github.com/jpsim/SourceKitten.git resolved at 0.30.1
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Working copy of https://github.com/jpsim/Yams.git resolved at 4.0.6
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Working copy of https://github.com/Quick/Quick.git resolved at 2.2.1
Creating working copy for https://github.com/apple/swift-argument-parser
Working copy of https://github.com/apple/swift-argument-parser resolved at 0.5.0
Creating working copy for https://github.com/Quick/Nimble.git
Working copy of https://github.com/Quick/Nimble.git resolved at 8.1.2
Creating working copy for https://github.com/drmohundro/SWXMLHash.git
Working copy of https://github.com/drmohundro/SWXMLHash.git resolved at 5.0.2
Creating working copy for https://github.com/realm/SwiftLint
Working copy of https://github.com/realm/SwiftLint resolved at 0.42.0
Creating working copy for https://github.com/krzyzanowskim/CryptoSwift.git
Working copy of https://github.com/krzyzanowskim/CryptoSwift.git resolved at 1.3.8
Building for debugging...
[0/11] Write sources
[4/11] Write swift-version-24593BA9C3E375BF.txt
[6/18] Emitting module ArgumentParserToolInfo
[7/18] Compiling ArgumentParserToolInfo ToolInfo.swift
[8/19] Compiling RimuruCore NamingConvention.swift
[9/19] Wrapping AST for ArgumentParserToolInfo for debugging
[11/53] Emitting module ArgumentParser
[12/57] Compiling ArgumentParser CollectionExtensions.swift
[13/57] Compiling ArgumentParser SequenceExtensions.swift
[14/57] Compiling ArgumentParser StringExtensions.swift
[15/57] Compiling ArgumentParser Tree.swift
[16/57] Emitting module RimuruCore
/host/spi-builder-workspace/Sources/RimuruCore/NamingConventionConverter.swift:12:23: warning: static property 'shared' is not concurrency-safe because non-'Sendable' type 'NamingConventionConverter' may have shared mutable state; this is an error in the Swift 6 language mode
 9 | import Foundation
10 |
11 | public final class NamingConventionConverter {
   |                    `- note: class 'NamingConventionConverter' does not conform to the 'Sendable' protocol
12 |     public static let shared = NamingConventionConverter()
   |                       |- warning: static property 'shared' is not concurrency-safe because non-'Sendable' type 'NamingConventionConverter' 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
13 |
14 |     public func convert(text: String,
[17/57] Compiling RimuruCore InputTextError.swift
[18/57] Compiling ArgumentParser BashCompletionsGenerator.swift
[19/57] Compiling ArgumentParser CompletionsGenerator.swift
[20/57] Compiling ArgumentParser FishCompletionsGenerator.swift
[21/57] Compiling ArgumentParser ZshCompletionsGenerator.swift
[22/57] Compiling ArgumentParser Argument.swift
[23/57] Compiling RimuruCore NamingConventionConverter.swift
/host/spi-builder-workspace/Sources/RimuruCore/NamingConventionConverter.swift:12:23: warning: static property 'shared' is not concurrency-safe because non-'Sendable' type 'NamingConventionConverter' may have shared mutable state; this is an error in the Swift 6 language mode
 9 | import Foundation
10 |
11 | public final class NamingConventionConverter {
   |                    `- note: class 'NamingConventionConverter' does not conform to the 'Sendable' protocol
12 |     public static let shared = NamingConventionConverter()
   |                       |- warning: static property 'shared' is not concurrency-safe because non-'Sendable' type 'NamingConventionConverter' 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
13 |
14 |     public func convert(text: String,
[24/57] Compiling RimuruCore SplitMeans.swift
[25/58] Compiling ArgumentParser ArgumentSet.swift
[26/58] Compiling ArgumentParser CommandParser.swift
[27/58] Compiling ArgumentParser InputOrigin.swift
[28/58] Compiling ArgumentParser Name.swift
[29/58] Compiling ArgumentParser Parsed.swift
[30/58] Compiling ArgumentParser Option.swift
[31/58] Compiling ArgumentParser OptionGroup.swift
[32/58] Compiling ArgumentParser CommandConfiguration.swift
[33/58] Compiling ArgumentParser EnumerableFlag.swift
[34/58] Compiling ArgumentParser ExpressibleByArgument.swift
[36/58] Compiling ArgumentParser ParsedValues.swift
[37/58] Compiling ArgumentParser ParserError.swift
[38/58] Compiling ArgumentParser SplitArguments.swift
[39/58] Compiling ArgumentParser DumpHelpGenerator.swift
[40/58] Compiling ArgumentParser HelpCommand.swift
[41/58] Compiling ArgumentParser HelpGenerator.swift
[42/58] Compiling ArgumentParser MessageInfo.swift
[43/58] Compiling ArgumentParser UsageGenerator.swift
[44/58] Compiling ArgumentParser ArgumentHelp.swift
[45/58] Compiling ArgumentParser CompletionKind.swift
[46/58] Compiling ArgumentParser Errors.swift
[47/58] Compiling ArgumentParser Flag.swift
[48/58] Compiling ArgumentParser NameSpecification.swift
[49/58] Compiling ArgumentParser ParsableArguments.swift
[50/58] Compiling ArgumentParser ParsableArgumentsValidation.swift
[51/58] Compiling ArgumentParser ParsableCommand.swift
[52/58] Compiling ArgumentParser ArgumentDecoder.swift
[53/58] Compiling ArgumentParser ArgumentDefinition.swift
[54/59] Wrapping AST for RimuruCore for debugging
[55/59] Wrapping AST for ArgumentParser for debugging
[57/63] Compiling Rimuru main.swift
[58/63] Compiling Rimuru NamingConventionExtension.swift
/host/spi-builder-workspace/Sources/Rimuru/Extension/NamingConventionExtension.swift:11:1: warning: extension declares a conformance of imported type 'NamingConvention' to imported protocol 'ExpressibleByArgument'; this will not behave correctly if the owners of 'RimuruCore' introduce this conformance in the future
 9 | import RimuruCore
10 |
11 | extension NamingConvention: ExpressibleByArgument {}
   | |- warning: extension declares a conformance of imported type 'NamingConvention' to imported protocol 'ExpressibleByArgument'; this will not behave correctly if the owners of 'RimuruCore' introduce this conformance in the future
   | `- note: add '@retroactive' to silence this warning
12 |
[59/63] Emitting module Rimuru
/host/spi-builder-workspace/Sources/Rimuru/Command/RimuruCommand.swift:12:16: warning: static property 'configuration' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
10 |
11 | struct RimuruCommand: ParsableCommand {
12 |     static var configuration = CommandConfiguration(commandName: "rimuru",
   |                |- warning: static property 'configuration' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                |- note: convert 'configuration' to a 'let' constant to make 'Sendable' shared state immutable
   |                |- note: add '@MainActor' to make static property 'configuration' part of global actor 'MainActor'
   |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
13 |                                                     abstract: "A tool for converting the input text to different naming convention",
14 |                                                     discussion: "e.g Rimuru --from lower --to upper exampleTestCase",
/host/spi-builder-workspace/Sources/Rimuru/Extension/NamingConventionExtension.swift:11:1: warning: extension declares a conformance of imported type 'NamingConvention' to imported protocol 'ExpressibleByArgument'; this will not behave correctly if the owners of 'RimuruCore' introduce this conformance in the future
 9 | import RimuruCore
10 |
11 | extension NamingConvention: ExpressibleByArgument {}
   | |- warning: extension declares a conformance of imported type 'NamingConvention' to imported protocol 'ExpressibleByArgument'; this will not behave correctly if the owners of 'RimuruCore' introduce this conformance in the future
   | `- note: add '@retroactive' to silence this warning
12 |
[60/63] Compiling Rimuru RimuruCommand.swift
/host/spi-builder-workspace/Sources/Rimuru/Command/RimuruCommand.swift:12:16: warning: static property 'configuration' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
10 |
11 | struct RimuruCommand: ParsableCommand {
12 |     static var configuration = CommandConfiguration(commandName: "rimuru",
   |                |- warning: static property 'configuration' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                |- note: convert 'configuration' to a 'let' constant to make 'Sendable' shared state immutable
   |                |- note: add '@MainActor' to make static property 'configuration' part of global actor 'MainActor'
   |                `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
13 |                                                     abstract: "A tool for converting the input text to different naming convention",
14 |                                                     discussion: "e.g Rimuru --from lower --to upper exampleTestCase",
[61/64] Wrapping AST for Rimuru for debugging
[62/64] Write Objects.LinkFileList
[63/64] Linking rimuru
Build complete! (103.80s)
Build complete.
{
  "dependencies" : [
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      "identity" : "swift-argument-parser",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "0.2.0",
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      "identity" : "swiftlint",
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      "type" : "sourceControl",
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  "platforms" : [
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    {
      "name" : "RimuruCore",
      "targets" : [
        "RimuruCore"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "RimuruCoreTests",
      "module_type" : "SwiftTarget",
      "name" : "RimuruCoreTests",
      "path" : "Tests/RimuruCoreTests",
      "sources" : [
        "Common/TestCase.swift",
        "NamingConventionConverterTests.swift"
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      "type" : "test"
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      "c99name" : "RimuruCore",
      "module_type" : "SwiftTarget",
      "name" : "RimuruCore",
      "path" : "Sources/RimuruCore",
      "product_memberships" : [
        "rimuru",
        "RimuruCore"
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      "sources" : [
        "InputTextError.swift",
        "NamingConvention.swift",
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        "SplitMeans.swift"
      ],
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      "c99name" : "Rimuru",
      "module_type" : "SwiftTarget",
      "name" : "Rimuru",
      "path" : "Sources/Rimuru",
      "product_dependencies" : [
        "ArgumentParser"
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      "product_memberships" : [
        "rimuru"
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      "sources" : [
        "Command/RimuruCommand.swift",
        "Extension/NamingConventionExtension.swift",
        "main.swift"
      ],
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        "RimuruCore"
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    }
  ],
  "tools_version" : "5.2"
}
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.