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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 Gluey, reference master (c4912c), with Swift 6.1 for Linux on 25 Apr 2025 12:53:33 UTC.

Swift 6 data race errors: 1

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/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/jadengeller/gluey.git
Reference: master
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/jadengeller/gluey
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at c4912ca Merge pull request #1 from MaxDesiatov/master
Cloned https://github.com/jadengeller/gluey.git
Revision (git rev-parse @):
c4912cafda002810fa301ae9dd5e888327451dc8
SUCCESS checkout https://github.com/jadengeller/gluey.git at master
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/jadengeller/gluey.git
https://github.com/jadengeller/gluey.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Gluey",
  "name" : "Gluey",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Gluey",
      "targets" : [
        "Gluey"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "GlueyTests",
      "module_type" : "SwiftTarget",
      "name" : "GlueyTests",
      "path" : "Sources/GlueyTests",
      "sources" : [
        "GlueyTests.swift"
      ],
      "target_dependencies" : [
        "Gluey"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Gluey",
      "module_type" : "SwiftTarget",
      "name" : "Gluey",
      "path" : "Sources/Gluey",
      "product_memberships" : [
        "Gluey"
      ],
      "sources" : [
        "Binding.swift",
        "ContextCopyable.swift",
        "DriedGlue.swift",
        "Glue.swift",
        "Unifiable.swift",
        "UnifiableType.swift",
        "UnificationError.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.2"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/host -w "$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
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-24593BA9C3E375BF.txt
[3/10] Compiling Gluey DriedGlue.swift
[4/10] Compiling Gluey Glue.swift
[5/10] Compiling Gluey UnifiableType.swift
[6/10] Compiling Gluey Unifiable.swift
[7/10] Compiling Gluey UnificationError.swift
[8/10] Compiling Gluey Binding.swift
/host/spi-builder-workspace/Sources/Gluey/Binding.swift:90:27: warning: generic parameter 'Element' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 11 | /// Note that this element may be set to `nil` to indicate that no
 12 | /// value has been determined.
 13 | public final class Binding<Element: Equatable> {
    |                            `- note: 'Element' previously declared here
 14 |     /// The shared state.
 15 |     internal var glue: Glue<Element> {
    :
 88 | extension Binding: Equatable {
 89 | // Reference identity
 90 |     public static func ==<Element>(lhs: Binding<Element>, rhs: Binding<Element>) -> Bool {
    |                           `- warning: generic parameter 'Element' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 91 |         return lhs === rhs
 92 |     }
[9/10] Emitting module Gluey
/host/spi-builder-workspace/Sources/Gluey/Binding.swift:90:27: warning: generic parameter 'Element' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 11 | /// Note that this element may be set to `nil` to indicate that no
 12 | /// value has been determined.
 13 | public final class Binding<Element: Equatable> {
    |                            `- note: 'Element' previously declared here
 14 |     /// The shared state.
 15 |     internal var glue: Glue<Element> {
    :
 88 | extension Binding: Equatable {
 89 | // Reference identity
 90 |     public static func ==<Element>(lhs: Binding<Element>, rhs: Binding<Element>) -> Bool {
    |                           `- warning: generic parameter 'Element' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode
 91 |         return lhs === rhs
 92 |     }
[10/10] Compiling Gluey ContextCopyable.swift
Build complete! (19.14s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Gluey",
  "name" : "Gluey",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Gluey",
      "targets" : [
        "Gluey"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "GlueyTests",
      "module_type" : "SwiftTarget",
      "name" : "GlueyTests",
      "path" : "Sources/GlueyTests",
      "sources" : [
        "GlueyTests.swift"
      ],
      "target_dependencies" : [
        "Gluey"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Gluey",
      "module_type" : "SwiftTarget",
      "name" : "Gluey",
      "path" : "Sources/Gluey",
      "product_memberships" : [
        "Gluey"
      ],
      "sources" : [
        "Binding.swift",
        "ContextCopyable.swift",
        "DriedGlue.swift",
        "Glue.swift",
        "Unifiable.swift",
        "UnifiableType.swift",
        "UnificationError.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.