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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 Chain, reference 0.3.0 (e693d4), with Swift 6.1 for Linux on 26 Apr 2025 16:12:43 UTC.

Swift 6 data race errors: 0

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/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/0xLet/Chain.git
Reference: 0.3.0
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/0xLet/Chain
 * tag               0.3.0      -> FETCH_HEAD
HEAD is now at e693d4d Merge pull request #5 from 0xLeif/develop
Cloned https://github.com/0xLet/Chain.git
Revision (git rev-parse @):
e693d4dcc8b21910299c076346f62d4de80a4aa8
SUCCESS checkout https://github.com/0xLet/Chain.git at 0.3.0
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/0xLet/Chain.git
https://github.com/0xLet/Chain.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
    {
      "identity" : "e.num",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "0.3.0",
            "upper_bound" : "1.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/0xLeif/E.num"
    }
  ],
  "manifest_display_name" : "Chain",
  "name" : "Chain",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Chain",
      "targets" : [
        "Chain"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ChainTests",
      "module_type" : "SwiftTarget",
      "name" : "ChainTests",
      "path" : "Tests/ChainTests",
      "product_dependencies" : [
        "E"
      ],
      "sources" : [
        "ChainTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "Chain"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Chain",
      "module_type" : "SwiftTarget",
      "name" : "Chain",
      "path" : "Sources/Chain",
      "product_dependencies" : [
        "E"
      ],
      "product_memberships" : [
        "Chain"
      ],
      "sources" : [
        "Chain.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.3"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/host -w "$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/0xLeif/E.num
[1/130] Fetching e.num
Fetched https://github.com/0xLeif/E.num from cache (0.18s)
Computing version for https://github.com/0xLeif/E.num
Computed https://github.com/0xLeif/E.num at 0.3.0 (0.63s)
Creating working copy for https://github.com/0xLeif/E.num
Working copy of https://github.com/0xLeif/E.num resolved at 0.3.0
Building for debugging...
[0/3] Write sources
[2/3] Write swift-version-24593BA9C3E375BF.txt
[4/8] Compiling E Variable.swift
[5/8] Compiling E State.swift
[6/8] Compiling E Function.swift
[7/8] Emitting module E
[8/8] Compiling E Control.swift
[10/11] Emitting module Chain
[11/11] Compiling Chain Chain.swift
/host/spi-builder-workspace/Sources/Chain/Chain.swift:45:46: warning: capture of 'action' with non-sendable type 'Function' in a '@Sendable' closure; this is an error in the Swift 6 language mode
 43 |                          let next):
 44 |             DispatchQueue.global().async {
 45 |                 let actionOutput: Variable = action.run(input) ?? Variable.void
    |                                              `- warning: capture of 'action' with non-sendable type 'Function' in a '@Sendable' closure; this is an error in the Swift 6 language mode
 46 |
 47 |                 DispatchQueue.main.async {
/host/spi-builder-workspace/.build/checkouts/E.num/Sources/E/Function.swift:9:13: note: enum 'Function' does not conform to the 'Sendable' protocol
 7 |
 8 | @dynamicCallable
 9 | public enum Function {
   |             `- note: enum 'Function' does not conform to the 'Sendable' protocol
10 |     case void(() -> ())
11 |     case `in`((Variable) -> ())
/host/spi-builder-workspace/Sources/Chain/Chain.swift:2:1: warning: add '@preconcurrency' to suppress 'Sendable'-related warnings from module 'E'
  1 | import Foundation
  2 | import E
    | `- warning: add '@preconcurrency' to suppress 'Sendable'-related warnings from module 'E'
  3 |
  4 | public indirect enum Chain {
/host/spi-builder-workspace/Sources/Chain/Chain.swift:45:57: warning: capture of 'input' with non-sendable type 'Variable?' in a '@Sendable' closure; this is an error in the Swift 6 language mode
 43 |                          let next):
 44 |             DispatchQueue.global().async {
 45 |                 let actionOutput: Variable = action.run(input) ?? Variable.void
    |                                                         `- warning: capture of 'input' with non-sendable type 'Variable?' in a '@Sendable' closure; this is an error in the Swift 6 language mode
 46 |
 47 |                 DispatchQueue.main.async {
/host/spi-builder-workspace/.build/checkouts/E.num/Sources/E/Variable.swift:8:13: note: enum 'Variable' does not conform to the 'Sendable' protocol
  6 | //
  7 |
  8 | public enum Variable: Hashable {
    |             `- note: enum 'Variable' does not conform to the 'Sendable' protocol
  9 |     case void
 10 |     case bool(Bool)
/host/spi-builder-workspace/Sources/Chain/Chain.swift:48:25: warning: capture of 'next' with non-sendable type 'Chain' in a '@Sendable' closure; this is an error in the Swift 6 language mode
  2 | import E
  3 |
  4 | public indirect enum Chain {
    |                      `- note: consider making enum 'Chain' conform to the 'Sendable' protocol
  5 |     case end
  6 |     case complete(E.Function?)
    :
 46 |
 47 |                 DispatchQueue.main.async {
 48 |                     _ = next.run(name: name,
    |                         `- warning: capture of 'next' with non-sendable type 'Chain' in a '@Sendable' closure; this is an error in the Swift 6 language mode
 49 |                                  input: actionOutput,
 50 |                                  logging: logging)
Build complete! (7.11s)
Build complete.
{
  "dependencies" : [
    {
      "identity" : "e.num",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "0.3.0",
            "upper_bound" : "1.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/0xLeif/E.num"
    }
  ],
  "manifest_display_name" : "Chain",
  "name" : "Chain",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Chain",
      "targets" : [
        "Chain"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ChainTests",
      "module_type" : "SwiftTarget",
      "name" : "ChainTests",
      "path" : "Tests/ChainTests",
      "product_dependencies" : [
        "E"
      ],
      "sources" : [
        "ChainTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "Chain"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Chain",
      "module_type" : "SwiftTarget",
      "name" : "Chain",
      "path" : "Sources/Chain",
      "product_dependencies" : [
        "E"
      ],
      "product_memberships" : [
        "Chain"
      ],
      "sources" : [
        "Chain.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.3"
}
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.