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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 Semver, reference master (0a6e2f), with Swift 6.1 for Linux on 28 Apr 2025 15:07:54 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/johnfairh/Semver.swift.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/johnfairh/Semver.swift
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 0a6e2fe Add Hashable conformance
Cloned https://github.com/johnfairh/Semver.swift.git
Revision (git rev-parse @):
0a6e2fe061ecb840c9bf80b6427e70ac039239fa
SUCCESS checkout https://github.com/johnfairh/Semver.swift.git at master
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/johnfairh/Semver.swift.git
https://github.com/johnfairh/Semver.swift.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Semver",
  "name" : "Semver",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.15"
    }
  ],
  "products" : [
    {
      "name" : "Semver",
      "targets" : [
        "Semver"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "5"
  ],
  "targets" : [
    {
      "c99name" : "SemverTests",
      "module_type" : "SwiftTarget",
      "name" : "SemverTests",
      "path" : "Tests",
      "sources" : [
        "ParserTests.swift",
        "SemverTests.swift"
      ],
      "target_dependencies" : [
        "Semver"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Semver",
      "module_type" : "SwiftTarget",
      "name" : "Semver",
      "path" : "Sources",
      "product_memberships" : [
        "Semver"
      ],
      "sources" : [
        "Semver+Expressible.swift",
        "Semver+Parser.swift",
        "Semver.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.1"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/host -w "$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
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-24593BA9C3E375BF.txt
[3/6] Compiling Semver Semver+Expressible.swift
[4/6] Compiling Semver Semver+Parser.swift
/host/spi-builder-workspace/Sources/Semver+Parser.swift:22:14: warning: associated value 'parseError' of 'Sendable'-conforming enum 'ParsingError' has non-sendable type 'Semver.ParsingError.Component'; this is an error in the Swift 6 language mode
 15 | extension Semver {
 16 |     public enum ParsingError: Error {
 17 |         public enum Component {
    |                     `- note: consider making enum 'Component' conform to the 'Sendable' protocol
 18 |             case major, minor, patch, prereleaseIdentifiers, buildMetadataIdentifiers
 19 |         }
 20 |         case malformedString(String, Error?)
 21 |         case digitsNotFound(String)
 22 |         case parseError(Component, Error)
    |              `- warning: associated value 'parseError' of 'Sendable'-conforming enum 'ParsingError' has non-sendable type 'Semver.ParsingError.Component'; this is an error in the Swift 6 language mode
 23 |
 24 |         var localizedDescription: String {
[5/6] Emitting module Semver
/host/spi-builder-workspace/Sources/Semver+Parser.swift:22:14: warning: associated value 'parseError' of 'Sendable'-conforming enum 'ParsingError' has non-sendable type 'Semver.ParsingError.Component'; this is an error in the Swift 6 language mode
 15 | extension Semver {
 16 |     public enum ParsingError: Error {
 17 |         public enum Component {
    |                     `- note: consider making enum 'Component' conform to the 'Sendable' protocol
 18 |             case major, minor, patch, prereleaseIdentifiers, buildMetadataIdentifiers
 19 |         }
 20 |         case malformedString(String, Error?)
 21 |         case digitsNotFound(String)
 22 |         case parseError(Component, Error)
    |              `- warning: associated value 'parseError' of 'Sendable'-conforming enum 'ParsingError' has non-sendable type 'Semver.ParsingError.Component'; this is an error in the Swift 6 language mode
 23 |
 24 |         var localizedDescription: String {
[6/6] Compiling Semver Semver.swift
Build complete! (7.10s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Semver",
  "name" : "Semver",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.15"
    }
  ],
  "products" : [
    {
      "name" : "Semver",
      "targets" : [
        "Semver"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "5"
  ],
  "targets" : [
    {
      "c99name" : "SemverTests",
      "module_type" : "SwiftTarget",
      "name" : "SemverTests",
      "path" : "Tests",
      "sources" : [
        "ParserTests.swift",
        "SemverTests.swift"
      ],
      "target_dependencies" : [
        "Semver"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Semver",
      "module_type" : "SwiftTarget",
      "name" : "Semver",
      "path" : "Sources",
      "product_memberships" : [
        "Semver"
      ],
      "sources" : [
        "Semver+Expressible.swift",
        "Semver+Parser.swift",
        "Semver.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.1"
}
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
Done.