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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 6.0 for Linux on 11 Apr 2025 11:38:54 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-6.0-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: 4.60.1
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:             6.0
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-6.0-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-6.0-latest: Pulling from finestructure/spi-images
Digest: sha256:9029076bb687edc160a3d5201c89e92dd9fa7309f33f090c4234365c83366c31
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-6.0-latest
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-24593BA9C3E375BF.txt
[3/6] Compiling ExpectToEventuallyEqual ExpectToEventuallyEqual.swift
/host/spi-builder-workspace/Sources/ExpectToEventuallyEqual/ExpectToEventuallyEqual.swift:20:32: warning: non-sendable type 'T' returned by implicitly asynchronous call to nonisolated function cannot cross actor boundary; 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 type 'T' returned by implicitly asynchronous call to nonisolated function cannot cross actor boundary; 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 type 'T' returned by implicitly asynchronous call to nonisolated function cannot cross actor boundary; 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 type 'T' returned by implicitly asynchronous call to nonisolated function cannot cross actor boundary; this is an error in the Swift 6 language mode
29 |     } while Date().compare(timeoutDate) == .orderedAscending
30 |
[4/6] Emitting module ExpectToEventuallyEqual
[5/6] Compiling ExpectToEventuallyEqual DescribeMismatch.swift
[6/6] Compiling ExpectToEventuallyEqual Fail.swift
Build complete! (8.53s)
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-6.0-latest: Pulling from finestructure/spi-images
Digest: sha256:9029076bb687edc160a3d5201c89e92dd9fa7309f33f090c4234365c83366c31
Status: Image is up to date for registry.gitlab.com/finestructure/spi-images:basic-6.0-latest
Done.