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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 Benchmarking, reference master (5fb268), with Swift 6.0 for macOS (SPM) on 1 Nov 2024 23:09:13 UTC.

Swift 6 data race errors: 1

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.1.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete

Build Log

========================================
RunAll
========================================
Builder version: 4.56.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/attaswift/Benchmarking.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/attaswift/Benchmarking
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 5fb2680 Merge pull request #1 from kareman/Swift4.1
Cloned https://github.com/attaswift/Benchmarking.git
Revision (git rev-parse @):
5fb2680a1a3d6197f5dbba29d9d57c2c1c56799e
SUCCESS checkout https://github.com/attaswift/Benchmarking.git at master
Fetching https://github.com/attaswift/OptionParser
[3/82] Fetching optionparser
Fetched https://github.com/attaswift/OptionParser from cache (0.67s)
Computing version for https://github.com/attaswift/OptionParser
Computed https://github.com/attaswift/OptionParser at 1.0.0 (0.62s)
Creating working copy for https://github.com/attaswift/OptionParser
Working copy of https://github.com/attaswift/OptionParser resolved at 1.0.0
========================================
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": "benchmarking",
      "name": "Benchmarking",
      "url": "https://github.com/attaswift/Benchmarking.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Benchmarking",
      "dependencies": [
        {
          "identity": "optionparser",
          "name": "OptionParser",
          "url": "https://github.com/attaswift/OptionParser",
          "version": "1.0.0",
          "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/OptionParser",
          "dependencies": [
          ]
        }
      ]
    }
  ]
}
Fetching https://github.com/attaswift/Benchmarking.git
[3/65] Fetching benchmarking
Fetched https://github.com/attaswift/Benchmarking.git from cache (0.67s)
Fetching https://github.com/attaswift/OptionParser from cache
Fetched https://github.com/attaswift/OptionParser from cache (0.46s)
Computing version for https://github.com/attaswift/OptionParser
Computed https://github.com/attaswift/OptionParser at 1.0.0 (0.02s)
Creating working copy for https://github.com/attaswift/OptionParser
Working copy of https://github.com/attaswift/OptionParser resolved at 1.0.0
Creating working copy for https://github.com/attaswift/Benchmarking.git
Working copy of https://github.com/attaswift/Benchmarking.git resolved at master (5fb2680)
warning: '.resolve-product-dependencies': dependency 'benchmarking' is not used by any target
Found 1 product dependencies
  - OptionParser
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $PWD
https://github.com/attaswift/Benchmarking.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.1.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete
Building for debugging...
[0/6] Write sources
[3/6] Write swift-version--7754E27361AE5C74.txt
[5/18] Compiling OptionParser Help.swift
[6/18] Compiling OptionParser Command.swift
[7/18] Emitting module BenchmarkIPC
[8/18] Compiling BenchmarkIPC BenchmarkIPC.swift
[9/18] Compiling OptionParser OptionParser.swift
[10/18] Compiling OptionParser Syntax.swift
[11/18] Compiling OptionParser Parameter.swift
[12/18] Compiling OptionParser OptionValue.swift
[13/18] Compiling OptionParser Option.swift
[14/18] Compiling OptionParser ParseContext.swift
[15/18] Emitting module OptionParser
[16/18] Compiling OptionParser Argument.swift
[16/18] Write Objects.LinkFileList
[17/18] Archiving libOptionParser.a
[19/27] Compiling Benchmarking Shuffle.swift
[20/27] Compiling Benchmarking Run.swift
/Users/admin/builder/spi-builder-workspace/Benchmarking/Run.swift:9:1: warning: extension declares a conformance of imported type 'OutputFormat' to imported protocol 'OptionValue'; this will not behave correctly if the owners of 'BenchmarkIPC' introduce this conformance in the future
  7 | import BenchmarkIPC
  8 |
  9 | extension RunOptions.OutputFormat: OptionValue {}
    | |- warning: extension declares a conformance of imported type 'OutputFormat' to imported protocol 'OptionValue'; this will not behave correctly if the owners of 'BenchmarkIPC' introduce this conformance in the future
    | `- note: add '@retroactive' to silence this warning
 10 |
 11 | struct AttabenchOptions {
/Users/admin/builder/spi-builder-workspace/Benchmarking/Run.swift:70:13: warning: variable 'sizes' was never mutated; consider changing to 'let' constant
 68 |             tasks = taskTitles.map { self.tasks[$0]! }
 69 |         }
 70 |         var sizes = options.sizes
    |             `- warning: variable 'sizes' was never mutated; consider changing to 'let' constant
 71 |         guard !sizes.isEmpty else {
 72 |             throw OptionError("Need at least one size")
[21/27] Compiling Benchmarking Noop.swift
[22/27] Compiling Benchmarking Output.swift
[23/27] Compiling Benchmarking InputGenerator.swift
[24/27] Compiling Benchmarking Timer.swift
[25/27] Compiling Benchmarking Complain.swift
/Users/admin/builder/spi-builder-workspace/Benchmarking/Complain.swift:12:13: warning: var 'standardErrorStream' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
10 |     }
11 | }
12 | private var standardErrorStream = ErrorStream()
   |             |- warning: var 'standardErrorStream' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |             |- note: convert 'standardErrorStream' to a 'let' constant to make 'Sendable' shared state immutable
   |             |- note: annotate 'standardErrorStream' 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
13 |
14 | public func complain(_ things: Any..., separator: String = " ", terminator: String = "\n") {
[26/27] Compiling Benchmarking Benchmark.swift
[27/27] Emitting module Benchmarking
/Users/admin/builder/spi-builder-workspace/Benchmarking/Complain.swift:12:13: warning: var 'standardErrorStream' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
10 |     }
11 | }
12 | private var standardErrorStream = ErrorStream()
   |             |- warning: var 'standardErrorStream' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |             |- note: convert 'standardErrorStream' to a 'let' constant to make 'Sendable' shared state immutable
   |             |- note: annotate 'standardErrorStream' 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
13 |
14 | public func complain(_ things: Any..., separator: String = " ", terminator: String = "\n") {
/Users/admin/builder/spi-builder-workspace/Benchmarking/Run.swift:9:1: warning: extension declares a conformance of imported type 'OutputFormat' to imported protocol 'OptionValue'; this will not behave correctly if the owners of 'BenchmarkIPC' introduce this conformance in the future
  7 | import BenchmarkIPC
  8 |
  9 | extension RunOptions.OutputFormat: OptionValue {}
    | |- warning: extension declares a conformance of imported type 'OutputFormat' to imported protocol 'OptionValue'; this will not behave correctly if the owners of 'BenchmarkIPC' introduce this conformance in the future
    | `- note: add '@retroactive' to silence this warning
 10 |
 11 | struct AttabenchOptions {
Build complete! (19.28s)
Build complete.
{
  "dependencies" : [
    {
      "identity" : "optionparser",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/attaswift/OptionParser"
    }
  ],
  "manifest_display_name" : "Benchmarking",
  "name" : "Benchmarking",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Benchmarking",
      "targets" : [
        "Benchmarking",
        "BenchmarkIPC"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "4"
  ],
  "targets" : [
    {
      "c99name" : "Benchmarking",
      "module_type" : "SwiftTarget",
      "name" : "Benchmarking",
      "path" : "Benchmarking",
      "product_dependencies" : [
        "OptionParser"
      ],
      "product_memberships" : [
        "Benchmarking"
      ],
      "sources" : [
        "Benchmark.swift",
        "Complain.swift",
        "InputGenerator.swift",
        "Noop.swift",
        "Output.swift",
        "Run.swift",
        "Shuffle.swift",
        "Timer.swift"
      ],
      "target_dependencies" : [
        "BenchmarkIPC"
      ],
      "type" : "library"
    },
    {
      "c99name" : "BenchmarkIPC",
      "module_type" : "SwiftTarget",
      "name" : "BenchmarkIPC",
      "path" : "BenchmarkIPC",
      "product_memberships" : [
        "Benchmarking"
      ],
      "sources" : [
        "BenchmarkIPC.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.0"
}
Done.