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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 CoreCLI with Swift 6.0 for macOS (SPM).

Swift 6 data race errors: 1

Build Command

env DEVELOPER_DIR=/Applications/Xcode-15.3.0.app xcrun --toolchain org.swift.600202405261a swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete

Build Log

========================================
RunAll
========================================
Builder version: 4.40.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/toshi0383/CoreCLI.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/toshi0383/CoreCLI
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 104c93f Fix default ArgumentParser
Cloned https://github.com/toshi0383/CoreCLI.git
Revision (git rev-parse @):
104c93ffb603b892e2665cac68fe9b4c5b5a7376
SUCCESS checkout https://github.com/toshi0383/CoreCLI.git at master
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $workDir
https://github.com/toshi0383/CoreCLI.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-15.3.0.app xcrun --toolchain org.swift.600202405261a swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-6F35C1178C84523A.txt
[3/7] Compiling CoreCLI CommandType.swift
/Users/admin/builder/spi-builder-workspace/Sources/CoreCLI/CommandType.swift:26:17: warning: stored property 'message' of 'Sendable'-conforming struct 'CommandError' has non-sendable type 'any CustomStringConvertible'; this is an error in the Swift 6 language mode
24 |
25 | public struct CommandError: Error, CustomStringConvertible {
26 |     private let message: CustomStringConvertible
   |                 `- warning: stored property 'message' of 'Sendable'-conforming struct 'CommandError' has non-sendable type 'any CustomStringConvertible'; this is an error in the Swift 6 language mode
27 |     public init(_ message: CustomStringConvertible) {
28 |         self.message = message
Swift.CustomStringConvertible:1:17: note: protocol 'CustomStringConvertible' does not conform to the 'Sendable' protocol
1 | public protocol CustomStringConvertible {
  |                 `- note: protocol 'CustomStringConvertible' does not conform to the 'Sendable' protocol
2 |     var description: String { get }
3 | }
[4/7] Compiling CoreCLI ArgumentParser.swift
[5/7] Emitting module CoreCLI
/Users/admin/builder/spi-builder-workspace/Sources/CoreCLI/CommandType.swift:26:17: warning: stored property 'message' of 'Sendable'-conforming struct 'CommandError' has non-sendable type 'any CustomStringConvertible'; this is an error in the Swift 6 language mode
24 |
25 | public struct CommandError: Error, CustomStringConvertible {
26 |     private let message: CustomStringConvertible
   |                 `- warning: stored property 'message' of 'Sendable'-conforming struct 'CommandError' has non-sendable type 'any CustomStringConvertible'; this is an error in the Swift 6 language mode
27 |     public init(_ message: CustomStringConvertible) {
28 |         self.message = message
Swift.CustomStringConvertible:1:17: note: protocol 'CustomStringConvertible' does not conform to the 'Sendable' protocol
1 | public protocol CustomStringConvertible {
  |                 `- note: protocol 'CustomStringConvertible' does not conform to the 'Sendable' protocol
2 |     var description: String { get }
3 | }
[6/7] Compiling CoreCLI AutoArgumentsDecodable.swift
[7/7] Compiling CoreCLI CommandRunner.swift
Build complete! (17.08s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "CoreCLI",
  "name" : "CoreCLI",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "CoreCLI",
      "targets" : [
        "CoreCLI"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "CoreCLITests",
      "module_type" : "SwiftTarget",
      "name" : "CoreCLITests",
      "path" : "Tests/CoreCLITests",
      "sources" : [
        "CoreCLITests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "CoreCLI"
      ],
      "type" : "test"
    },
    {
      "c99name" : "CoreCLI",
      "module_type" : "SwiftTarget",
      "name" : "CoreCLI",
      "path" : "Sources/CoreCLI",
      "product_memberships" : [
        "CoreCLI"
      ],
      "sources" : [
        "ArgumentParser.swift",
        "AutoArgumentsDecodable.swift",
        "CommandRunner.swift",
        "CommandType.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.0"
}
Done.
This is a staging environment. For live and up-to-date package information, visit swiftpackageindex.com.