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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 Consumer, reference master (b0152e), with Swift 6.1 for Linux on 26 Apr 2025 03:25:06 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/nicklockwood/Consumer.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/nicklockwood/Consumer
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at b0152ed Updated for 0.4.0 release
Cloned https://github.com/nicklockwood/Consumer.git
Revision (git rev-parse @):
b0152edc1e4cb30f3b7acfbc18089fe4da7d8fd5
SUCCESS checkout https://github.com/nicklockwood/Consumer.git at master
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/nicklockwood/Consumer.git
https://github.com/nicklockwood/Consumer.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Consumer",
  "name" : "Consumer",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Consumer",
      "targets" : [
        "Consumer"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ConsumerTests",
      "module_type" : "SwiftTarget",
      "name" : "ConsumerTests",
      "path" : "Tests",
      "sources" : [
        "ConsumerTests.swift",
        "PerformanceTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "Consumer"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Consumer",
      "module_type" : "SwiftTarget",
      "name" : "Consumer",
      "path" : "Sources",
      "product_memberships" : [
        "Consumer"
      ],
      "sources" : [
        "Consumer.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/host -w "$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
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-24593BA9C3E375BF.txt
[3/4] Emitting module Consumer
/host/spi-builder-workspace/Sources/Consumer.swift:107:20: warning: stored property 'kind' of 'Sendable'-conforming struct 'Error' has non-sendable type 'Consumer<Label>.Error.Kind'; this is an error in the Swift 6 language mode
 99 |     /// A Parsing error
100 |     struct Error: Swift.Error {
101 |         public indirect enum Kind {
    |                              `- note: consider making enum 'Kind' conform to the 'Sendable' protocol
102 |             case expected(Consumer)
103 |             case unexpectedToken
    :
105 |         }
106 |
107 |         public var kind: Kind
    |                    `- warning: stored property 'kind' of 'Sendable'-conforming struct 'Error' has non-sendable type 'Consumer<Label>.Error.Kind'; this is an error in the Swift 6 language mode
108 |         public var location: Location?
109 |         public var remaining: Substring.UnicodeScalarView? {
/host/spi-builder-workspace/Sources/Consumer.swift:108:20: warning: stored property 'location' of 'Sendable'-conforming struct 'Error' has non-sendable type 'Consumer<Label>.Location?'; this is an error in the Swift 6 language mode
 68 |
 69 |     /// Source location
 70 |     struct Location: Equatable {
    |            `- note: consider making struct 'Location' conform to the 'Sendable' protocol
 71 |         fileprivate var source: String.UnicodeScalarView
 72 |         public let range: Range<String.Index>
    :
106 |
107 |         public var kind: Kind
108 |         public var location: Location?
    |                    `- warning: stored property 'location' of 'Sendable'-conforming struct 'Error' has non-sendable type 'Consumer<Label>.Location?'; this is an error in the Swift 6 language mode
109 |         public var remaining: Substring.UnicodeScalarView? {
110 |             return _remaining
[4/4] Compiling Consumer Consumer.swift
/host/spi-builder-workspace/Sources/Consumer.swift:107:20: warning: stored property 'kind' of 'Sendable'-conforming struct 'Error' has non-sendable type 'Consumer<Label>.Error.Kind'; this is an error in the Swift 6 language mode
 99 |     /// A Parsing error
100 |     struct Error: Swift.Error {
101 |         public indirect enum Kind {
    |                              `- note: consider making enum 'Kind' conform to the 'Sendable' protocol
102 |             case expected(Consumer)
103 |             case unexpectedToken
    :
105 |         }
106 |
107 |         public var kind: Kind
    |                    `- warning: stored property 'kind' of 'Sendable'-conforming struct 'Error' has non-sendable type 'Consumer<Label>.Error.Kind'; this is an error in the Swift 6 language mode
108 |         public var location: Location?
109 |         public var remaining: Substring.UnicodeScalarView? {
/host/spi-builder-workspace/Sources/Consumer.swift:108:20: warning: stored property 'location' of 'Sendable'-conforming struct 'Error' has non-sendable type 'Consumer<Label>.Location?'; this is an error in the Swift 6 language mode
 68 |
 69 |     /// Source location
 70 |     struct Location: Equatable {
    |            `- note: consider making struct 'Location' conform to the 'Sendable' protocol
 71 |         fileprivate var source: String.UnicodeScalarView
 72 |         public let range: Range<String.Index>
    :
106 |
107 |         public var kind: Kind
108 |         public var location: Location?
    |                    `- warning: stored property 'location' of 'Sendable'-conforming struct 'Error' has non-sendable type 'Consumer<Label>.Location?'; this is an error in the Swift 6 language mode
109 |         public var remaining: Substring.UnicodeScalarView? {
110 |             return _remaining
Build complete! (8.14s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Consumer",
  "name" : "Consumer",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Consumer",
      "targets" : [
        "Consumer"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ConsumerTests",
      "module_type" : "SwiftTarget",
      "name" : "ConsumerTests",
      "path" : "Tests",
      "sources" : [
        "ConsumerTests.swift",
        "PerformanceTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "Consumer"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Consumer",
      "module_type" : "SwiftTarget",
      "name" : "Consumer",
      "path" : "Sources",
      "product_memberships" : [
        "Consumer"
      ],
      "sources" : [
        "Consumer.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
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.