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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 SwiftRLP, reference v0.0.6 (a10665), with Swift 6.1 for Linux on 28 Apr 2025 07:55:57 UTC.

Swift 6 data race errors: 1

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/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/alephao/swift-rlp.git
Reference: v0.0.6
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/alephao/swift-rlp
 * tag               v0.0.6     -> FETCH_HEAD
HEAD is now at a10665a feat: rename to swift-rlp, SwiftRLP
Cloned https://github.com/alephao/swift-rlp.git
Revision (git rev-parse @):
a10665a247500121f54b198be8aa531876e624ef
SUCCESS checkout https://github.com/alephao/swift-rlp.git at v0.0.6
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/alephao/swift-rlp.git
https://github.com/alephao/swift-rlp.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
    {
      "identity" : "swift-argument-parser",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.2.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-argument-parser.git"
    }
  ],
  "manifest_display_name" : "SwiftRLP",
  "name" : "SwiftRLP",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "12.0"
    },
    {
      "name" : "macos",
      "version" : "10.14"
    }
  ],
  "products" : [
    {
      "name" : "SwiftRLP",
      "targets" : [
        "SwiftRLP"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "cli",
      "targets" : [
        "cli"
      ],
      "type" : {
        "executable" : null
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "cli",
      "module_type" : "SwiftTarget",
      "name" : "cli",
      "path" : "Sources/cli",
      "product_dependencies" : [
        "ArgumentParser"
      ],
      "product_memberships" : [
        "cli"
      ],
      "sources" : [
        "RLPCli.swift"
      ],
      "target_dependencies" : [
        "SwiftRLP"
      ],
      "type" : "executable"
    },
    {
      "c99name" : "SwiftRLPTests",
      "module_type" : "SwiftTarget",
      "name" : "SwiftRLPTests",
      "path" : "Tests/SwiftRLPTests",
      "sources" : [
        "RLPDecoderTests.swift",
        "RLPEncoderTests.swift"
      ],
      "target_dependencies" : [
        "SwiftRLP"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SwiftRLP",
      "module_type" : "SwiftTarget",
      "name" : "SwiftRLP",
      "path" : "Sources/SwiftRLP",
      "product_memberships" : [
        "SwiftRLP",
        "cli"
      ],
      "sources" : [
        "RLPDecoder.swift",
        "RLPEncoder.swift",
        "RLPError.swift",
        "RLPValue.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.9"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/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.git
[1/14950] Fetching swift-argument-parser
Fetched https://github.com/apple/swift-argument-parser.git from cache (0.75s)
Computing version for https://github.com/apple/swift-argument-parser.git
Computed https://github.com/apple/swift-argument-parser.git at 1.5.0 (1.18s)
Creating working copy for https://github.com/apple/swift-argument-parser.git
Working copy of https://github.com/apple/swift-argument-parser.git resolved at 1.5.0
[1/1] Compiling plugin GenerateManual
Building for debugging...
[1/12] Write sources
[5/12] Write swift-version-24593BA9C3E375BF.txt
[7/19] Emitting module ArgumentParserToolInfo
[8/19] Compiling ArgumentParserToolInfo ToolInfo.swift
[9/20] Wrapping AST for ArgumentParserToolInfo for debugging
[11/58] Emitting module ArgumentParser
[12/63] Compiling ArgumentParser ArgumentVisibility.swift
[13/63] Compiling ArgumentParser CompletionKind.swift
[14/63] Compiling ArgumentParser Errors.swift
[15/63] Compiling ArgumentParser Flag.swift
[16/63] Compiling ArgumentParser NameSpecification.swift
[17/63] Compiling ArgumentParser Option.swift
[18/63] Compiling ArgumentParser BashCompletionsGenerator.swift
[19/63] Compiling ArgumentParser CompletionsGenerator.swift
[20/63] Compiling ArgumentParser FishCompletionsGenerator.swift
[21/63] Compiling ArgumentParser ZshCompletionsGenerator.swift
[22/63] Compiling ArgumentParser Argument.swift
[23/63] Compiling ArgumentParser ArgumentHelp.swift
[24/63] Compiling SwiftRLP RLPValue.swift
[25/63] Compiling SwiftRLP RLPError.swift
[26/63] Compiling SwiftRLP RLPEncoder.swift
[27/63] Compiling SwiftRLP RLPDecoder.swift
[28/63] Emitting module SwiftRLP
[29/64] Compiling ArgumentParser CollectionExtensions.swift
[30/64] Compiling ArgumentParser Platform.swift
[31/64] Compiling ArgumentParser SequenceExtensions.swift
[32/64] Compiling ArgumentParser StringExtensions.swift
[33/64] Compiling ArgumentParser Tree.swift
[34/64] Wrapping AST for SwiftRLP for debugging
[36/64] Compiling ArgumentParser ExpressibleByArgument.swift
[37/64] Compiling ArgumentParser ParsableArguments.swift
[38/64] Compiling ArgumentParser ParsableArgumentsValidation.swift
[39/64] Compiling ArgumentParser ParsableCommand.swift
[40/64] Compiling ArgumentParser ArgumentDecoder.swift
[41/64] Compiling ArgumentParser Name.swift
[42/64] Compiling ArgumentParser Parsed.swift
[43/64] Compiling ArgumentParser ParsedValues.swift
[44/64] Compiling ArgumentParser ParserError.swift
[45/64] Compiling ArgumentParser SplitArguments.swift
[46/64] Compiling ArgumentParser DumpHelpGenerator.swift
[47/64] Compiling ArgumentParser HelpCommand.swift
[48/64] Compiling ArgumentParser HelpGenerator.swift
[49/64] Compiling ArgumentParser MessageInfo.swift
[50/64] Compiling ArgumentParser UsageGenerator.swift
[51/64] Compiling ArgumentParser ArgumentDefinition.swift
[52/64] Compiling ArgumentParser ArgumentSet.swift
[53/64] Compiling ArgumentParser CommandParser.swift
[54/64] Compiling ArgumentParser InputKey.swift
[55/64] Compiling ArgumentParser InputOrigin.swift
[56/64] Compiling ArgumentParser OptionGroup.swift
[57/64] Compiling ArgumentParser AsyncParsableCommand.swift
[58/64] Compiling ArgumentParser CommandConfiguration.swift
[59/64] Compiling ArgumentParser CommandGroup.swift
[60/64] Compiling ArgumentParser EnumerableFlag.swift
[61/65] Wrapping AST for ArgumentParser for debugging
[63/67] Compiling cli RLPCli.swift
/host/spi-builder-workspace/Sources/cli/RLPCli.swift:31:16: 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
29 |     }
30 |
31 |     static var configuration = CommandConfiguration(
   |                |- 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
32 |         abstract: "A utility for performing rlp encoding/decoding.",
33 |         subcommands: [Encode.self, Decode.self]
[64/67] Emitting module cli
/host/spi-builder-workspace/Sources/cli/RLPCli.swift:31:16: 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
29 |     }
30 |
31 |     static var configuration = CommandConfiguration(
   |                |- 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
32 |         abstract: "A utility for performing rlp encoding/decoding.",
33 |         subcommands: [Encode.self, Decode.self]
[65/68] Wrapping AST for cli for debugging
[66/68] Write Objects.LinkFileList
[67/68] Linking cli
Build complete! (11.07s)
Build complete.
{
  "dependencies" : [
    {
      "identity" : "swift-argument-parser",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.2.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-argument-parser.git"
    }
  ],
  "manifest_display_name" : "SwiftRLP",
  "name" : "SwiftRLP",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "12.0"
    },
    {
      "name" : "macos",
      "version" : "10.14"
    }
  ],
  "products" : [
    {
      "name" : "SwiftRLP",
      "targets" : [
        "SwiftRLP"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "cli",
      "targets" : [
        "cli"
      ],
      "type" : {
        "executable" : null
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "cli",
      "module_type" : "SwiftTarget",
      "name" : "cli",
      "path" : "Sources/cli",
      "product_dependencies" : [
        "ArgumentParser"
      ],
      "product_memberships" : [
        "cli"
      ],
      "sources" : [
        "RLPCli.swift"
      ],
      "target_dependencies" : [
        "SwiftRLP"
      ],
      "type" : "executable"
    },
    {
      "c99name" : "SwiftRLPTests",
      "module_type" : "SwiftTarget",
      "name" : "SwiftRLPTests",
      "path" : "Tests/SwiftRLPTests",
      "sources" : [
        "RLPDecoderTests.swift",
        "RLPEncoderTests.swift"
      ],
      "target_dependencies" : [
        "SwiftRLP"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SwiftRLP",
      "module_type" : "SwiftTarget",
      "name" : "SwiftRLP",
      "path" : "Sources/SwiftRLP",
      "product_memberships" : [
        "SwiftRLP",
        "cli"
      ],
      "sources" : [
        "RLPDecoder.swift",
        "RLPEncoder.swift",
        "RLPError.swift",
        "RLPValue.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.9"
}
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.