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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 Parsimonious, reference v2.3.0 (4f6b48), with Swift 6.1 for Linux on 28 Apr 2025 00:26:49 UTC.

Swift 6 data race errors: 1

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/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/Prosumma/Parsimonious.git
Reference: v2.3.0
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/Prosumma/Parsimonious
 * tag               v2.3.0     -> FETCH_HEAD
HEAD is now at 4f6b48a Got rid of ranges. Now it just uses index.
Cloned https://github.com/Prosumma/Parsimonious.git
Revision (git rev-parse @):
4f6b48ac91439718c1917526316e181c2b28622f
SUCCESS checkout https://github.com/Prosumma/Parsimonious.git at v2.3.0
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/Prosumma/Parsimonious.git
https://github.com/Prosumma/Parsimonious.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
    {
      "identity" : "iatheto",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "3.0.0",
            "upper_bound" : "4.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/Prosumma/Iatheto"
    }
  ],
  "manifest_display_name" : "Parsimonious",
  "name" : "Parsimonious",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Parsimonious",
      "targets" : [
        "Parsimonious"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ParsimoniousTests",
      "module_type" : "SwiftTarget",
      "name" : "ParsimoniousTests",
      "path" : "Tests/ParsimoniousTests",
      "product_dependencies" : [
        "Iatheto"
      ],
      "resources" : [
        {
          "path" : "/host/spi-builder-workspace/Tests/ParsimoniousTests/JSON.json",
          "rule" : {
            "copy" : {
            }
          }
        }
      ],
      "sources" : [
        "CombinatorTests.swift",
        "JSONTests.swift",
        "ParseErrorTests.swift",
        "ParseStateTests.swift",
        "ParserTests.swift",
        "StringTests.swift"
      ],
      "target_dependencies" : [
        "Parsimonious"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Parsimonious",
      "module_type" : "SwiftTarget",
      "name" : "Parsimonious",
      "path" : "Sources/Parsimonious",
      "product_memberships" : [
        "Parsimonious"
      ],
      "sources" : [
        "Chain.swift",
        "Match.swift",
        "Misc.swift",
        "OperatorDeclarations.swift",
        "Optional.swift",
        "ParseError.swift",
        "ParseResult.swift",
        "ParseState.swift",
        "Parser.swift",
        "Predicates.swift",
        "String.swift",
        "Tuple.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.7"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/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/Prosumma/Iatheto
[1/637] Fetching iatheto
Fetched https://github.com/Prosumma/Iatheto from cache (0.21s)
Computing version for https://github.com/Prosumma/Iatheto
Computed https://github.com/Prosumma/Iatheto at 3.0.6 (0.78s)
Creating working copy for https://github.com/Prosumma/Iatheto
Working copy of https://github.com/Prosumma/Iatheto resolved at 3.0.6
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-24593BA9C3E375BF.txt
[3/14] Compiling Parsimonious Optional.swift
/host/spi-builder-workspace/Sources/Parsimonious/ParseError.swift:14:14: warning: stored property 'index' of 'Sendable'-conforming generic struct 'ParseError' has non-sendable type 'Source.Index'; this is an error in the Swift 6 language mode
12 |
13 |   public let reason: Reason
14 |   public let index: Source.Index
   |              `- warning: stored property 'index' of 'Sendable'-conforming generic struct 'ParseError' has non-sendable type 'Source.Index'; this is an error in the Swift 6 language mode
15 |
16 |   public init(reason: Reason, index: Source.Index) {
[4/14] Compiling Parsimonious ParseError.swift
/host/spi-builder-workspace/Sources/Parsimonious/ParseError.swift:14:14: warning: stored property 'index' of 'Sendable'-conforming generic struct 'ParseError' has non-sendable type 'Source.Index'; this is an error in the Swift 6 language mode
12 |
13 |   public let reason: Reason
14 |   public let index: Source.Index
   |              `- warning: stored property 'index' of 'Sendable'-conforming generic struct 'ParseError' has non-sendable type 'Source.Index'; this is an error in the Swift 6 language mode
15 |
16 |   public init(reason: Reason, index: Source.Index) {
[5/15] Compiling Parsimonious ParseResult.swift
[6/15] Compiling Parsimonious ParseState.swift
[7/15] Compiling Parsimonious Parser.swift
[8/15] Compiling Parsimonious Tuple.swift
[9/15] Compiling Parsimonious String.swift
[10/15] Compiling Parsimonious Predicates.swift
[11/15] Emitting module Parsimonious
/host/spi-builder-workspace/Sources/Parsimonious/ParseError.swift:14:14: warning: stored property 'index' of 'Sendable'-conforming generic struct 'ParseError' has non-sendable type 'Source.Index'; this is an error in the Swift 6 language mode
12 |
13 |   public let reason: Reason
14 |   public let index: Source.Index
   |              `- warning: stored property 'index' of 'Sendable'-conforming generic struct 'ParseError' has non-sendable type 'Source.Index'; this is an error in the Swift 6 language mode
15 |
16 |   public init(reason: Reason, index: Source.Index) {
[12/15] Compiling Parsimonious Chain.swift
[13/15] Compiling Parsimonious Match.swift
[14/15] Compiling Parsimonious Misc.swift
[15/15] Compiling Parsimonious OperatorDeclarations.swift
Build complete! (9.74s)
Build complete.
{
  "dependencies" : [
    {
      "identity" : "iatheto",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "3.0.0",
            "upper_bound" : "4.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/Prosumma/Iatheto"
    }
  ],
  "manifest_display_name" : "Parsimonious",
  "name" : "Parsimonious",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Parsimonious",
      "targets" : [
        "Parsimonious"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ParsimoniousTests",
      "module_type" : "SwiftTarget",
      "name" : "ParsimoniousTests",
      "path" : "Tests/ParsimoniousTests",
      "product_dependencies" : [
        "Iatheto"
      ],
      "resources" : [
        {
          "path" : "/host/spi-builder-workspace/Tests/ParsimoniousTests/JSON.json",
          "rule" : {
            "copy" : {
            }
          }
        }
      ],
      "sources" : [
        "CombinatorTests.swift",
        "JSONTests.swift",
        "ParseErrorTests.swift",
        "ParseStateTests.swift",
        "ParserTests.swift",
        "StringTests.swift"
      ],
      "target_dependencies" : [
        "Parsimonious"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Parsimonious",
      "module_type" : "SwiftTarget",
      "name" : "Parsimonious",
      "path" : "Sources/Parsimonious",
      "product_memberships" : [
        "Parsimonious"
      ],
      "sources" : [
        "Chain.swift",
        "Match.swift",
        "Misc.swift",
        "OperatorDeclarations.swift",
        "Optional.swift",
        "ParseError.swift",
        "ParseResult.swift",
        "ParseState.swift",
        "Parser.swift",
        "Predicates.swift",
        "String.swift",
        "Tuple.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.7"
}
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.