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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 StreamReader, reference 1.0.1 (0cabaa), with Swift 6.1 for Linux on 25 Apr 2025 14:21:52 UTC.

Swift 6 data race errors: 1

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4606859-0":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.1-latest swift build --triple x86_64-unknown-linux-gnu -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 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/mxcl/streamreader.git
Reference: 1.0.1
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/mxcl/streamreader
 * tag               1.0.1      -> FETCH_HEAD
HEAD is now at 0cabaa9 Update Path.swift dep version to 1.0.0-alpha.1
Cloned https://github.com/mxcl/streamreader.git
Revision (git rev-parse @):
0cabaa9d539037da1b25b8cbe58a8ecafaedea67
SUCCESS checkout https://github.com/mxcl/streamreader.git at 1.0.1
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/mxcl/streamreader.git
https://github.com/mxcl/streamreader.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
    {
      "identity" : "path.swift",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0-alpha.1",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/mxcl/Path.swift"
    }
  ],
  "manifest_display_name" : "StreamReader",
  "name" : "StreamReader",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "StreamReader",
      "targets" : [
        "StreamReader"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "StreamReader",
      "module_type" : "SwiftTarget",
      "name" : "StreamReader",
      "path" : ".",
      "product_dependencies" : [
        "Path"
      ],
      "product_memberships" : [
        "StreamReader"
      ],
      "sources" : [
        "StreamReader.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.2"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-0":/host -w "$PWD" registry.gitlab.com/finestructure/spi-images:basic-6.1-latest swift build --triple x86_64-unknown-linux-gnu -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 2>&1
basic-6.1-latest: Pulling from finestructure/spi-images
Digest: sha256:3bdcac04179f4ed3e5b8e9dbd6e74bbf5ebc0f4fde48bbaad7d1e5c757e65bcb
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-6.1-latest
Fetching https://github.com/mxcl/Path.swift
[1/1059] Fetching path.swift
Fetched https://github.com/mxcl/Path.swift from cache (0.29s)
Computing version for https://github.com/mxcl/Path.swift
Computed https://github.com/mxcl/Path.swift at 1.4.1 (1.88s)
Creating working copy for https://github.com/mxcl/Path.swift
Working copy of https://github.com/mxcl/Path.swift resolved at 1.4.1
Building for debugging...
[0/3] Write sources
[2/3] Write swift-version-24593BA9C3E375BF.txt
[4/13] Compiling Path PathToBool.swift
[5/14] Compiling Path Path+ls.swift
[6/14] Emitting module Path
[7/14] Compiling Path Extensions.swift
[8/14] Compiling Path Path+Attributes.swift
[9/14] Compiling Path Path.swift
[10/14] Compiling Path Path+FileManager.swift
[11/14] Compiling Path Path+StringConvertibles.swift
[12/14] Compiling Path Path+Codable.swift
[13/14] Compiling Path Path+CommonDirectories.swift
[14/14] Compiling Path Pathish.swift
[16/17] Emitting module StreamReader
/host/spi-builder-workspace/StreamReader.swift:16:20: warning: stored property 'path' of 'Sendable'-conforming struct 'OpenError' has non-sendable type 'Path'; this is an error in the Swift 6 language mode
14 |
15 |     public struct OpenError: LocalizedError {
16 |         public let path: Path
   |                    `- warning: stored property 'path' of 'Sendable'-conforming struct 'OpenError' has non-sendable type 'Path'; this is an error in the Swift 6 language mode
17 |         public var errorDescription: String? {
18 |             return "could not open: \(path)"
/host/spi-builder-workspace/.build/checkouts/Path.swift/Sources/Path.swift:43:15: note: struct 'Path' does not conform to the 'Sendable' protocol
 41 |  - SeeAlso: `Pathish` for most methods you will use on `Path` instances.
 42 |  */
 43 | public struct Path: Pathish {
    |               `- note: struct 'Path' does not conform to the 'Sendable' protocol
 44 |
 45 |     /// The normalized string representation of the underlying filesystem path
/host/spi-builder-workspace/StreamReader.swift:2:1: warning: add '@preconcurrency' to suppress 'Sendable'-related warnings from module 'Path'
 1 | import Foundation
 2 | import Path
   | `- warning: add '@preconcurrency' to suppress 'Sendable'-related warnings from module 'Path'
 3 |
 4 | // I confess I copy and pasted this from StackOverflow.com
[17/17] Compiling StreamReader StreamReader.swift
/host/spi-builder-workspace/StreamReader.swift:16:20: warning: stored property 'path' of 'Sendable'-conforming struct 'OpenError' has non-sendable type 'Path'; this is an error in the Swift 6 language mode
14 |
15 |     public struct OpenError: LocalizedError {
16 |         public let path: Path
   |                    `- warning: stored property 'path' of 'Sendable'-conforming struct 'OpenError' has non-sendable type 'Path'; this is an error in the Swift 6 language mode
17 |         public var errorDescription: String? {
18 |             return "could not open: \(path)"
/host/spi-builder-workspace/.build/checkouts/Path.swift/Sources/Path.swift:43:15: note: struct 'Path' does not conform to the 'Sendable' protocol
 41 |  - SeeAlso: `Pathish` for most methods you will use on `Path` instances.
 42 |  */
 43 | public struct Path: Pathish {
    |               `- note: struct 'Path' does not conform to the 'Sendable' protocol
 44 |
 45 |     /// The normalized string representation of the underlying filesystem path
/host/spi-builder-workspace/StreamReader.swift:2:1: warning: add '@preconcurrency' to suppress 'Sendable'-related warnings from module 'Path'
 1 | import Foundation
 2 | import Path
   | `- warning: add '@preconcurrency' to suppress 'Sendable'-related warnings from module 'Path'
 3 |
 4 | // I confess I copy and pasted this from StackOverflow.com
Build complete! (16.65s)
Build complete.
{
  "dependencies" : [
    {
      "identity" : "path.swift",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0-alpha.1",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/mxcl/Path.swift"
    }
  ],
  "manifest_display_name" : "StreamReader",
  "name" : "StreamReader",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "StreamReader",
      "targets" : [
        "StreamReader"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "StreamReader",
      "module_type" : "SwiftTarget",
      "name" : "StreamReader",
      "path" : ".",
      "product_dependencies" : [
        "Path"
      ],
      "product_memberships" : [
        "StreamReader"
      ],
      "sources" : [
        "StreamReader.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.2"
}
basic-6.1-latest: Pulling from finestructure/spi-images
Digest: sha256:3bdcac04179f4ed3e5b8e9dbd6e74bbf5ebc0f4fde48bbaad7d1e5c757e65bcb
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-6.1-latest
Done.