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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 CommandLine with Swift 6.0 for macOS (SPM).

Swift 6 data race errors: 2

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/davidskrundz/commandline.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/davidskrundz/commandline
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 9b56116 Swift 5 update
Cloned https://github.com/davidskrundz/commandline.git
Revision (git rev-parse @):
9b56116871b5cbd9f81455ab639fa1705efb5ac8
SUCCESS checkout https://github.com/davidskrundz/commandline.git at master
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $workDir
https://github.com/davidskrundz/commandline.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...
[0/7] Write sources
[2/7] Write swift-version-6F35C1178C84523A.txt
[4/17] Compiling Generator Generator.swift
[5/17] Compiling Generator Generator+Iterator.swift
[6/17] Compiling Generator Generator+Sequence.swift
[7/17] Compiling Generator Generator+Previous.swift
[8/17] Compiling Generator Generator+Peek.swift
[9/17] Compiling Generator Generator+Move.swift
[10/17] Compiling Generator Collection+Generator.swift
[11/17] Compiling Generator Character.swift
[12/17] Emitting module Generator
[13/17] Compiling Generator Generator+String.swift
[14/25] Compiling CommandLine StandardInOut.swift
/Users/admin/builder/spi-builder-workspace/Sources/CommandLine/StandardInOut.swift:29:12: warning: let 'standardIn' is not concurrency-safe because non-'Sendable' type 'StandardIn' may have shared mutable state; this is an error in the Swift 6 language mode
19 | }
20 |
21 | public struct StandardIn {
   |               `- note: consider making struct 'StandardIn' conform to the 'Sendable' protocol
22 | 	fileprivate init() {}
23 |
   :
27 | }
28 |
29 | public let standardIn: StandardIn = StandardIn()
   |            |- warning: let 'standardIn' is not concurrency-safe because non-'Sendable' type 'StandardIn' may have shared mutable state; this is an error in the Swift 6 language mode
   |            |- note: annotate 'standardIn' 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
30 | public let standardOut: StandardOut = StandardOut()
31 |
/Users/admin/builder/spi-builder-workspace/Sources/CommandLine/StandardInOut.swift:30:12: warning: let 'standardOut' is not concurrency-safe because non-'Sendable' type 'StandardOut' may have shared mutable state; this is an error in the Swift 6 language mode
 6 | import Foundation
 7 |
 8 | public struct StandardOut: Output {
   |               `- note: consider making struct 'StandardOut' conform to the 'Sendable' protocol
 9 | 	fileprivate init() {}
10 |
   :
28 |
29 | public let standardIn: StandardIn = StandardIn()
30 | public let standardOut: StandardOut = StandardOut()
   |            |- warning: let 'standardOut' is not concurrency-safe because non-'Sendable' type 'StandardOut' may have shared mutable state; this is an error in the Swift 6 language mode
   |            |- note: annotate 'standardOut' 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
31 |
[15/25] Compiling CommandLine ParseError.swift
[16/25] Compiling CommandLine Option.swift
[17/25] Compiling CommandLine Output.swift
[18/25] Compiling CommandLine ArgumentParser.swift
[19/25] Compiling CommandLine ANSI.swift
[20/25] Compiling CommandLine AutoTask.swift
[21/25] Emitting module CommandLine
/Users/admin/builder/spi-builder-workspace/Sources/CommandLine/StandardInOut.swift:29:12: warning: let 'standardIn' is not concurrency-safe because non-'Sendable' type 'StandardIn' may have shared mutable state; this is an error in the Swift 6 language mode
19 | }
20 |
21 | public struct StandardIn {
   |               `- note: consider making struct 'StandardIn' conform to the 'Sendable' protocol
22 | 	fileprivate init() {}
23 |
   :
27 | }
28 |
29 | public let standardIn: StandardIn = StandardIn()
   |            |- warning: let 'standardIn' is not concurrency-safe because non-'Sendable' type 'StandardIn' may have shared mutable state; this is an error in the Swift 6 language mode
   |            |- note: annotate 'standardIn' 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
30 | public let standardOut: StandardOut = StandardOut()
31 |
/Users/admin/builder/spi-builder-workspace/Sources/CommandLine/StandardInOut.swift:30:12: warning: let 'standardOut' is not concurrency-safe because non-'Sendable' type 'StandardOut' may have shared mutable state; this is an error in the Swift 6 language mode
 6 | import Foundation
 7 |
 8 | public struct StandardOut: Output {
   |               `- note: consider making struct 'StandardOut' conform to the 'Sendable' protocol
 9 | 	fileprivate init() {}
10 |
   :
28 |
29 | public let standardIn: StandardIn = StandardIn()
30 | public let standardOut: StandardOut = StandardOut()
   |            |- warning: let 'standardOut' is not concurrency-safe because non-'Sendable' type 'StandardOut' may have shared mutable state; this is an error in the Swift 6 language mode
   |            |- note: annotate 'standardOut' 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
31 |
[21/25] Write Objects.LinkFileList
[23/25] Archiving libsCommandLine.a
[24/25] Linking libdCommandLine.dylib
Build complete! (24.93s)
Fetching https://github.com/DavidSkrundz/Collections.git
[1/203] Fetching collections
Fetched https://github.com/DavidSkrundz/Collections.git from cache (0.86s)
Computing version for https://github.com/DavidSkrundz/Collections.git
Computed https://github.com/DavidSkrundz/Collections.git at 2.0.0 (0.68s)
Creating working copy for https://github.com/DavidSkrundz/Collections.git
Working copy of https://github.com/DavidSkrundz/Collections.git resolved at 2.0.0
Build complete.
{
  "dependencies" : [
    {
      "identity" : "collections",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "2.0.0",
            "upper_bound" : "2.1.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/DavidSkrundz/Collections.git"
    }
  ],
  "manifest_display_name" : "CommandLine",
  "name" : "CommandLine",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "CommandLine",
      "targets" : [
        "CommandLine"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "sCommandLine",
      "targets" : [
        "CommandLine"
      ],
      "type" : {
        "library" : [
          "static"
        ]
      }
    },
    {
      "name" : "dCommandLine",
      "targets" : [
        "CommandLine"
      ],
      "type" : {
        "library" : [
          "dynamic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "CommandLineTests",
      "module_type" : "SwiftTarget",
      "name" : "CommandLineTests",
      "path" : "Tests/CommandLineTests",
      "sources" : [
        "ArgumentParserTests.swift",
        "AutoTaskTests.swift"
      ],
      "target_dependencies" : [
        "CommandLine"
      ],
      "type" : "test"
    },
    {
      "c99name" : "CommandLine",
      "module_type" : "SwiftTarget",
      "name" : "CommandLine",
      "path" : "Sources/CommandLine",
      "product_dependencies" : [
        "Generator"
      ],
      "product_memberships" : [
        "CommandLine",
        "sCommandLine",
        "dCommandLine"
      ],
      "sources" : [
        "ANSI.swift",
        "ArgumentParser.swift",
        "AutoTask.swift",
        "Option.swift",
        "Output.swift",
        "ParseError.swift",
        "StandardInOut.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Done.
This is a staging environment. For live and up-to-date package information, visit swiftpackageindex.com.