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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 SshConfig, reference main (d16cea), with Swift 6.1 for macOS (SPM) on 26 Apr 2025 12:52:09 UTC.

Swift 6 data race errors: 1

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64 -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

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/xxlabaza/SshConfig.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/xxlabaza/SshConfig
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at d16cea0 update readme
Cloned https://github.com/xxlabaza/SshConfig.git
Revision (git rev-parse @):
d16cea0b256d8e76c2116a3ca8d691ddc78c44d2
SUCCESS checkout https://github.com/xxlabaza/SshConfig.git at main
========================================
ResolveProductDependencies
========================================
Resolving dependencies ...
{
  "identity": ".resolve-product-dependencies",
  "name": "resolve-dependencies",
  "url": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "version": "unspecified",
  "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "dependencies": [
    {
      "identity": "sshconfig",
      "name": "SshConfig",
      "url": "https://github.com/xxlabaza/SshConfig.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/SshConfig",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/xxlabaza/SshConfig.git
[1/169] Fetching sshconfig
Fetched https://github.com/xxlabaza/SshConfig.git from cache (0.73s)
Creating working copy for https://github.com/xxlabaza/SshConfig.git
Working copy of https://github.com/xxlabaza/SshConfig.git resolved at main (d16cea0)
warning: '.resolve-product-dependencies': dependency 'sshconfig' is not used by any target
Found 0 product dependencies
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/xxlabaza/SshConfig.git
https://github.com/xxlabaza/SshConfig.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "SshConfig",
  "name" : "SshConfig",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "watchos",
      "version" : "6.0"
    },
    {
      "name" : "tvos",
      "version" : "13.0"
    },
    {
      "name" : "macos",
      "version" : "10.15"
    }
  ],
  "products" : [
    {
      "name" : "SshConfig",
      "targets" : [
        "SshConfig"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SshConfigTests",
      "module_type" : "SwiftTarget",
      "name" : "SshConfigTests",
      "path" : "Tests/SshConfigTests",
      "sources" : [
        "ConfigDecoderTests.swift",
        "ConfigEncoderTests.swift",
        "ConfigParserTests.swift",
        "ConfigResolveTests.swift",
        "ConfigTests.swift",
        "HostTests.swift",
        "PatternTests.swift",
        "TokenizerTests.swift",
        "UsageExample.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "SshConfig"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SshConfig",
      "module_type" : "SwiftTarget",
      "name" : "SshConfig",
      "path" : "Sources/SshConfig",
      "product_memberships" : [
        "SshConfig"
      ],
      "sources" : [
        "Config.swift",
        "Errors.swift",
        "Host.swift",
        "Properties.swift",
        "decoder/ConfigDecoder.swift",
        "decoder/ConfigDecodingContainer.swift",
        "decoder/ConfigSingleValueDecodingContainer.swift",
        "decoder/ConfigUnkeyedDecodingContainer.swift",
        "decoder/DecodingContext.swift",
        "encoder/ConfigEncoder.swift",
        "parser/ConfigParser.swift",
        "parser/Tokenizer.swift",
        "ssh.swift",
        "utils/CharacterSet+contains.swift",
        "utils/Equatable+Error.swift",
        "utils/NoneAsNil.swift",
        "utils/Pattern.swift",
        "utils/StringProtocol+Hex.swift",
        "utils/StringProtocol+firstCapitalized.swift",
        "utils/StringProtocol+isBlank.swift",
        "utils/StringProtocol+toTokens.swift",
        "utils/StringProtocol+unquoted.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.1"
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64 -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
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-2F0A5646E1D333AE.txt
[3/23] Emitting module SshConfig
/Users/admin/builder/spi-builder-workspace/Sources/SshConfig/Properties.swift:41:23: warning: static property 'defaults' is not concurrency-safe because non-'Sendable' type 'ssh.Properties' may have shared mutable state; this is an error in the Swift 6 language mode
  23 |   and their types, but you can find it in any SSH manual.
  24 |   */
  25 |   struct Properties: Equatable, Codable {
     |          `- note: consider making struct 'Properties' conform to the 'Sendable' protocol
  26 |
  27 |     /**
     :
  39 |     ```
  40 |     */
  41 |     public static let defaults = Properties(
     |                       |- warning: static property 'defaults' is not concurrency-safe because non-'Sendable' type 'ssh.Properties' may have shared mutable state; this is an error in the Swift 6 language mode
     |                       |- note: add '@MainActor' to make static property 'defaults' part of global actor 'MainActor'
     |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
  42 |       addKeysToAgent: .no,
  43 |       addressFamily: .any,
[4/25] Compiling SshConfig StringProtocol+toTokens.swift
[5/25] Compiling SshConfig StringProtocol+unquoted.swift
[6/25] Compiling SshConfig ConfigParser.swift
[7/25] Compiling SshConfig Tokenizer.swift
[8/25] Compiling SshConfig Pattern.swift
[9/25] Compiling SshConfig StringProtocol+Hex.swift
[10/25] Compiling SshConfig Config.swift
[11/25] Compiling SshConfig Errors.swift
[12/25] Compiling SshConfig Host.swift
[13/25] Compiling SshConfig DecodingContext.swift
[14/25] Compiling SshConfig ConfigEncoder.swift
[15/25] Compiling SshConfig Properties.swift
/Users/admin/builder/spi-builder-workspace/Sources/SshConfig/Properties.swift:41:23: warning: static property 'defaults' is not concurrency-safe because non-'Sendable' type 'ssh.Properties' may have shared mutable state; this is an error in the Swift 6 language mode
  23 |   and their types, but you can find it in any SSH manual.
  24 |   */
  25 |   struct Properties: Equatable, Codable {
     |          `- note: consider making struct 'Properties' conform to the 'Sendable' protocol
  26 |
  27 |     /**
     :
  39 |     ```
  40 |     */
  41 |     public static let defaults = Properties(
     |                       |- warning: static property 'defaults' is not concurrency-safe because non-'Sendable' type 'ssh.Properties' may have shared mutable state; this is an error in the Swift 6 language mode
     |                       |- note: add '@MainActor' to make static property 'defaults' part of global actor 'MainActor'
     |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
  42 |       addKeysToAgent: .no,
  43 |       addressFamily: .any,
[16/25] Compiling SshConfig ConfigDecoder.swift
/Users/admin/builder/spi-builder-workspace/Sources/SshConfig/Properties.swift:41:23: warning: static property 'defaults' is not concurrency-safe because non-'Sendable' type 'ssh.Properties' may have shared mutable state; this is an error in the Swift 6 language mode
  23 |   and their types, but you can find it in any SSH manual.
  24 |   */
  25 |   struct Properties: Equatable, Codable {
     |          `- note: consider making struct 'Properties' conform to the 'Sendable' protocol
  26 |
  27 |     /**
     :
  39 |     ```
  40 |     */
  41 |     public static let defaults = Properties(
     |                       |- warning: static property 'defaults' is not concurrency-safe because non-'Sendable' type 'ssh.Properties' may have shared mutable state; this is an error in the Swift 6 language mode
     |                       |- note: add '@MainActor' to make static property 'defaults' part of global actor 'MainActor'
     |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
  42 |       addKeysToAgent: .no,
  43 |       addressFamily: .any,
[17/25] Compiling SshConfig ConfigDecodingContainer.swift
/Users/admin/builder/spi-builder-workspace/Sources/SshConfig/Properties.swift:41:23: warning: static property 'defaults' is not concurrency-safe because non-'Sendable' type 'ssh.Properties' may have shared mutable state; this is an error in the Swift 6 language mode
  23 |   and their types, but you can find it in any SSH manual.
  24 |   */
  25 |   struct Properties: Equatable, Codable {
     |          `- note: consider making struct 'Properties' conform to the 'Sendable' protocol
  26 |
  27 |     /**
     :
  39 |     ```
  40 |     */
  41 |     public static let defaults = Properties(
     |                       |- warning: static property 'defaults' is not concurrency-safe because non-'Sendable' type 'ssh.Properties' may have shared mutable state; this is an error in the Swift 6 language mode
     |                       |- note: add '@MainActor' to make static property 'defaults' part of global actor 'MainActor'
     |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
  42 |       addKeysToAgent: .no,
  43 |       addressFamily: .any,
[18/25] Compiling SshConfig StringProtocol+firstCapitalized.swift
[19/25] Compiling SshConfig StringProtocol+isBlank.swift
[20/25] Compiling SshConfig ConfigSingleValueDecodingContainer.swift
[21/25] Compiling SshConfig ConfigUnkeyedDecodingContainer.swift
[22/25] Compiling SshConfig Equatable+Error.swift
[23/25] Compiling SshConfig NoneAsNil.swift
[24/25] Compiling SshConfig ssh.swift
[25/25] Compiling SshConfig CharacterSet+contains.swift
Build complete! (5.53s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "SshConfig",
  "name" : "SshConfig",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "watchos",
      "version" : "6.0"
    },
    {
      "name" : "tvos",
      "version" : "13.0"
    },
    {
      "name" : "macos",
      "version" : "10.15"
    }
  ],
  "products" : [
    {
      "name" : "SshConfig",
      "targets" : [
        "SshConfig"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SshConfigTests",
      "module_type" : "SwiftTarget",
      "name" : "SshConfigTests",
      "path" : "Tests/SshConfigTests",
      "sources" : [
        "ConfigDecoderTests.swift",
        "ConfigEncoderTests.swift",
        "ConfigParserTests.swift",
        "ConfigResolveTests.swift",
        "ConfigTests.swift",
        "HostTests.swift",
        "PatternTests.swift",
        "TokenizerTests.swift",
        "UsageExample.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "SshConfig"
      ],
      "type" : "test"
    },
    {
      "c99name" : "SshConfig",
      "module_type" : "SwiftTarget",
      "name" : "SshConfig",
      "path" : "Sources/SshConfig",
      "product_memberships" : [
        "SshConfig"
      ],
      "sources" : [
        "Config.swift",
        "Errors.swift",
        "Host.swift",
        "Properties.swift",
        "decoder/ConfigDecoder.swift",
        "decoder/ConfigDecodingContainer.swift",
        "decoder/ConfigSingleValueDecodingContainer.swift",
        "decoder/ConfigUnkeyedDecodingContainer.swift",
        "decoder/DecodingContext.swift",
        "encoder/ConfigEncoder.swift",
        "parser/ConfigParser.swift",
        "parser/Tokenizer.swift",
        "ssh.swift",
        "utils/CharacterSet+contains.swift",
        "utils/Equatable+Error.swift",
        "utils/NoneAsNil.swift",
        "utils/Pattern.swift",
        "utils/StringProtocol+Hex.swift",
        "utils/StringProtocol+firstCapitalized.swift",
        "utils/StringProtocol+isBlank.swift",
        "utils/StringProtocol+toTokens.swift",
        "utils/StringProtocol+unquoted.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.1"
}
Done.