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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 ExpectToEventuallyEqual, reference main (9bde19), with Swift 6.1 for Linux on 1 May 2025 07:47:36 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: 4.61.2
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/jonreid/ExpectToEventuallyEqual.git
Reference: main
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/jonreid/ExpectToEventuallyEqual
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 9bde197 . d Update README to show 2.0.0
Cloned https://github.com/jonreid/ExpectToEventuallyEqual.git
Revision (git rev-parse @):
9bde197316c12d4be18f7646629c87f3d9321728
SUCCESS checkout https://github.com/jonreid/ExpectToEventuallyEqual.git at main
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/jonreid/ExpectToEventuallyEqual.git
https://github.com/jonreid/ExpectToEventuallyEqual.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "ExpectToEventuallyEqual",
  "name" : "ExpectToEventuallyEqual",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.15"
    },
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "watchos",
      "version" : "6.0"
    },
    {
      "name" : "tvos",
      "version" : "13.0"
    }
  ],
  "products" : [
    {
      "name" : "ExpectToEventuallyEqual",
      "targets" : [
        "ExpectToEventuallyEqual"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ExpectToEventuallyEqualTests",
      "module_type" : "SwiftTarget",
      "name" : "ExpectToEventuallyEqualTests",
      "path" : "Tests/ExpectToEventuallyEqualTests",
      "sources" : [
        "DescribeMismatchTests.swift",
        "ExpectToEventuallyEqualTests.swift",
        "FailSpy.swift"
      ],
      "target_dependencies" : [
        "ExpectToEventuallyEqual"
      ],
      "type" : "test"
    },
    {
      "c99name" : "ExpectToEventuallyEqual",
      "module_type" : "SwiftTarget",
      "name" : "ExpectToEventuallyEqual",
      "path" : "Sources/ExpectToEventuallyEqual",
      "product_memberships" : [
        "ExpectToEventuallyEqual"
      ],
      "sources" : [
        "DescribeMismatch.swift",
        "ExpectToEventuallyEqual.swift",
        "Fail.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.6"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/host -w "$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
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-24593BA9C3E375BF.txt
[3/6] Emitting module ExpectToEventuallyEqual
[4/6] Compiling ExpectToEventuallyEqual ExpectToEventuallyEqual.swift
/host/spi-builder-workspace/Sources/ExpectToEventuallyEqual/ExpectToEventuallyEqual.swift:20:32: warning: non-sendable result type 'T' cannot be sent from nonisolated context in call to parameter 'actual'; this is an error in the Swift 6 language mode
 6 |
 7 | @MainActor
 8 | public func expectToEventuallyEqual<T: Equatable>(
   |                                     `- note: consider making generic parameter 'T' conform to the 'Sendable' protocol
 9 |     actual: () async throws -> T,
10 |     expected: T,
   :
18 |     let timeoutDate = Date(timeIntervalSinceNow: timeout)
19 |
20 |     var lastActual = try await actual()
   |                                `- warning: non-sendable result type 'T' cannot be sent from nonisolated context in call to parameter 'actual'; this is an error in the Swift 6 language mode
21 |     var tryCount = 0
22 |     repeat {
/host/spi-builder-workspace/Sources/ExpectToEventuallyEqual/ExpectToEventuallyEqual.swift:28:32: warning: non-sendable result type 'T' cannot be sent from nonisolated context in call to parameter 'actual'; this is an error in the Swift 6 language mode
 6 |
 7 | @MainActor
 8 | public func expectToEventuallyEqual<T: Equatable>(
   |                                     `- note: consider making generic parameter 'T' conform to the 'Sendable' protocol
 9 |     actual: () async throws -> T,
10 |     expected: T,
   :
26 |         }
27 |         try await Task.sleep(nanoseconds: 10_000_000)
28 |         lastActual = try await actual()
   |                                `- warning: non-sendable result type 'T' cannot be sent from nonisolated context in call to parameter 'actual'; this is an error in the Swift 6 language mode
29 |     } while Date().compare(timeoutDate) == .orderedAscending
30 |
[5/6] Compiling ExpectToEventuallyEqual DescribeMismatch.swift
[6/6] Compiling ExpectToEventuallyEqual Fail.swift
Build complete! (5.70s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "ExpectToEventuallyEqual",
  "name" : "ExpectToEventuallyEqual",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.15"
    },
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "watchos",
      "version" : "6.0"
    },
    {
      "name" : "tvos",
      "version" : "13.0"
    }
  ],
  "products" : [
    {
      "name" : "ExpectToEventuallyEqual",
      "targets" : [
        "ExpectToEventuallyEqual"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ExpectToEventuallyEqualTests",
      "module_type" : "SwiftTarget",
      "name" : "ExpectToEventuallyEqualTests",
      "path" : "Tests/ExpectToEventuallyEqualTests",
      "sources" : [
        "DescribeMismatchTests.swift",
        "ExpectToEventuallyEqualTests.swift",
        "FailSpy.swift"
      ],
      "target_dependencies" : [
        "ExpectToEventuallyEqual"
      ],
      "type" : "test"
    },
    {
      "c99name" : "ExpectToEventuallyEqual",
      "module_type" : "SwiftTarget",
      "name" : "ExpectToEventuallyEqual",
      "path" : "Sources/ExpectToEventuallyEqual",
      "product_memberships" : [
        "ExpectToEventuallyEqual"
      ],
      "sources" : [
        "DescribeMismatch.swift",
        "ExpectToEventuallyEqual.swift",
        "Fail.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.6"
}
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.