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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 JSONFeed with Swift 6.0 for Linux.

Swift 6 data race errors: 1

Build Command

bash -c docker run --rm -v "checkouts-4609320-1":/host -w "$workDir" registry.gitlab.com/finestructure/spi-images:basic-6.0-latest swift build --triple x86_64-unknown-linux-gnu -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 4.40.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/flight-school/jsonfeed.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/flight-school/jsonfeed
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 71b34b9 Use GitHub Actions for CI/CD (#1)
Cloned https://github.com/flight-school/jsonfeed.git
Revision (git rev-parse @):
71b34b945c17c5998e8c1f93ccefd8fd95033a78
SUCCESS checkout https://github.com/flight-school/jsonfeed.git at master
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.0
Building package at path:  $workDir
https://github.com/flight-school/jsonfeed.git
Running build ...
bash -c docker run --rm -v "checkouts-4609320-1":/host -w "$workDir" registry.gitlab.com/finestructure/spi-images:basic-6.0-latest swift build --triple x86_64-unknown-linux-gnu -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete 2>&1
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-24593BA9C3E375BF.txt
[3/8] Compiling JSONFeed Author.swift
[4/8] Emitting module JSONFeed
/host/spi-builder-workspace/Sources/JSONFeed/Feed.swift:5:23: warning: static property 'v1' is not concurrency-safe because non-'Sendable' type 'URL' may have shared mutable state; this is an error in the Swift 6 language mode
  3 | public struct Feed: Codable, Equatable {
  4 |     /// JSON Feed Version 1
  5 |     public static let v1 = URL(string: "https://jsonfeed.org/version/1")!
    |                       `- warning: static property 'v1' is not concurrency-safe because non-'Sendable' type 'URL' may have shared mutable state; this is an error in the Swift 6 language mode
  6 |
  7 |     /**
Foundation.URL:1:15: note: struct 'URL' does not conform to the 'Sendable' protocol
 1 | public struct URL : ReferenceConvertible, Equatable {
   |               `- note: struct 'URL' does not conform to the 'Sendable' protocol
 2 |     public typealias ReferenceType = NSURL
 3 |     public init?(string: String)
/host/spi-builder-workspace/Sources/JSONFeed/Feed.swift:1:1: warning: add '@preconcurrency' to suppress 'Sendable'-related warnings from module 'Foundation'
  1 | import Foundation
    | `- warning: add '@preconcurrency' to suppress 'Sendable'-related warnings from module 'Foundation'
  2 |
  3 | public struct Feed: Codable, Equatable {
  4 |     /// JSON Feed Version 1
  5 |     public static let v1 = URL(string: "https://jsonfeed.org/version/1")!
    |                       |- note: annotate 'v1' with '@MainActor' if property should only be accessed from the main actor
    |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
  6 |
  7 |     /**
[5/8] Compiling JSONFeed Attachment.swift
[6/8] Compiling JSONFeed Hub.swift
[7/8] Compiling JSONFeed Feed.swift
/host/spi-builder-workspace/Sources/JSONFeed/Feed.swift:5:23: warning: static property 'v1' is not concurrency-safe because non-'Sendable' type 'URL' may have shared mutable state; this is an error in the Swift 6 language mode
  3 | public struct Feed: Codable, Equatable {
  4 |     /// JSON Feed Version 1
  5 |     public static let v1 = URL(string: "https://jsonfeed.org/version/1")!
    |                       `- warning: static property 'v1' is not concurrency-safe because non-'Sendable' type 'URL' may have shared mutable state; this is an error in the Swift 6 language mode
  6 |
  7 |     /**
Foundation.URL:1:15: note: struct 'URL' does not conform to the 'Sendable' protocol
 1 | public struct URL : ReferenceConvertible, Equatable {
   |               `- note: struct 'URL' does not conform to the 'Sendable' protocol
 2 |     public typealias ReferenceType = NSURL
 3 |     public init?(string: String)
/host/spi-builder-workspace/Sources/JSONFeed/Feed.swift:1:1: warning: add '@preconcurrency' to suppress 'Sendable'-related warnings from module 'Foundation'
  1 | import Foundation
    | `- warning: add '@preconcurrency' to suppress 'Sendable'-related warnings from module 'Foundation'
  2 |
  3 | public struct Feed: Codable, Equatable {
  4 |     /// JSON Feed Version 1
  5 |     public static let v1 = URL(string: "https://jsonfeed.org/version/1")!
    |                       |- note: annotate 'v1' with '@MainActor' if property should only be accessed from the main actor
    |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
  6 |
  7 |     /**
[8/8] Compiling JSONFeed Item.swift
Build complete! (11.94s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "JSONFeed",
  "name" : "JSONFeed",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "JSONFeed",
      "targets" : [
        "JSONFeed"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "JSONFeedTests",
      "module_type" : "SwiftTarget",
      "name" : "JSONFeedTests",
      "path" : "Tests/JSONFeedTests",
      "sources" : [
        "JSONFeedTests.swift"
      ],
      "target_dependencies" : [
        "JSONFeed"
      ],
      "type" : "test"
    },
    {
      "c99name" : "JSONFeed",
      "module_type" : "SwiftTarget",
      "name" : "JSONFeed",
      "path" : "Sources/JSONFeed",
      "product_memberships" : [
        "JSONFeed"
      ],
      "sources" : [
        "Attachment.swift",
        "Author.swift",
        "Feed.swift",
        "Hub.swift",
        "Item.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Done.
This is a staging environment. For live and up-to-date package information, visit swiftpackageindex.com.