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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

Failed to build BDDSwift, reference main (a08363), with Swift 6.1 for Linux on 27 Apr 2025 07:30:06 UTC.

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 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/KaneCheshire/BDDSwift.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/KaneCheshire/BDDSwift
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at a08363c Update to README
Cloned https://github.com/KaneCheshire/BDDSwift.git
Revision (git rev-parse @):
a08363c0cb3dfd8ae7ec3701f85f9a593c3086f1
SUCCESS checkout https://github.com/KaneCheshire/BDDSwift.git at main
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/KaneCheshire/BDDSwift.git
https://github.com/KaneCheshire/BDDSwift.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "BDDSwift",
  "name" : "BDDSwift",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "BDDSwift",
      "targets" : [
        "BDDSwift"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "BDDSwiftTests",
      "module_type" : "SwiftTarget",
      "name" : "BDDSwiftTests",
      "path" : "Tests/BDDSwiftTests",
      "sources" : [
        "ScenarioTests.swift"
      ],
      "target_dependencies" : [
        "BDDSwift"
      ],
      "type" : "test"
    },
    {
      "c99name" : "BDDSwift",
      "module_type" : "SwiftTarget",
      "name" : "BDDSwift",
      "path" : "Sources/BDDSwift",
      "product_memberships" : [
        "BDDSwift"
      ],
      "sources" : [
        "Scenario.swift",
        "Step.swift",
        "StepsBuilder.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.7"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-1":/host -w "$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
[3/6] Compiling BDDSwift StepsBuilder.swift
[4/6] Emitting module BDDSwift
/host/spi-builder-workspace/Sources/BDDSwift/Scenario.swift:32:36: warning: static property 'lastExecutedScenario' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
30 |
31 |     /// The most recently executed scenario.
32 |     static public private(set) var lastExecutedScenario: Scenario?
   |                                    |- warning: static property 'lastExecutedScenario' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                                    |- note: convert 'lastExecutedScenario' to a 'let' constant to make 'Sendable' shared state immutable
   |                                    |- note: add '@MainActor' to make static property 'lastExecutedScenario' part of global actor 'MainActor'
   |                                    `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
33 |
34 |     /// The most recently executed step for this scenario.
[5/6] Compiling BDDSwift Step.swift
[6/6] Compiling BDDSwift Scenario.swift
/host/spi-builder-workspace/Sources/BDDSwift/Scenario.swift:32:36: warning: static property 'lastExecutedScenario' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
30 |
31 |     /// The most recently executed scenario.
32 |     static public private(set) var lastExecutedScenario: Scenario?
   |                                    |- warning: static property 'lastExecutedScenario' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
   |                                    |- note: convert 'lastExecutedScenario' to a 'let' constant to make 'Sendable' shared state immutable
   |                                    |- note: add '@MainActor' to make static property 'lastExecutedScenario' part of global actor 'MainActor'
   |                                    `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
33 |
34 |     /// The most recently executed step for this scenario.
/host/spi-builder-workspace/Sources/BDDSwift/Scenario.swift:54:9: error: cannot find 'XCTContext' in scope
52 |         let totalStepCount = stepsChain.index + 1
53 |         let activityName = "Running scenario with \(totalStepCount) steps: \(description)"
54 |         XCTContext.runActivity(named: activityName) { _ in
   |         `- error: cannot find 'XCTContext' in scope
55 |             stepsChain.performInSequence(in: &self, totalStepCount: totalStepCount)
56 |         }
/host/spi-builder-workspace/Sources/BDDSwift/Scenario.swift:65:9: error: cannot find 'XCTContext' in scope
63 |         if let previous { previous.performInSequence(in: &scenario, totalStepCount: totalStepCount) }
64 |         let activityName = "Performing step \(index + 1) of \(totalStepCount): \(description)"
65 |         XCTContext.runActivity(named: activityName) { _ in
   |         `- error: cannot find 'XCTContext' in scope
66 |             scenario.lastExecutedStep = self
67 |             logic()
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 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
[0/1] Planning build
Building for debugging...
[0/1] Write swift-version-24593BA9C3E375BF.txt
[2/5] Compiling BDDSwift StepsBuilder.swift
[3/5] Emitting module BDDSwift
[4/5] Compiling BDDSwift Step.swift
[5/5] Compiling BDDSwift Scenario.swift
/host/spi-builder-workspace/Sources/BDDSwift/Scenario.swift:54:9: error: cannot find 'XCTContext' in scope
52 |         let totalStepCount = stepsChain.index + 1
53 |         let activityName = "Running scenario with \(totalStepCount) steps: \(description)"
54 |         XCTContext.runActivity(named: activityName) { _ in
   |         `- error: cannot find 'XCTContext' in scope
55 |             stepsChain.performInSequence(in: &self, totalStepCount: totalStepCount)
56 |         }
/host/spi-builder-workspace/Sources/BDDSwift/Scenario.swift:65:9: error: cannot find 'XCTContext' in scope
63 |         if let previous { previous.performInSequence(in: &scenario, totalStepCount: totalStepCount) }
64 |         let activityName = "Performing step \(index + 1) of \(totalStepCount): \(description)"
65 |         XCTContext.runActivity(named: activityName) { _ in
   |         `- error: cannot find 'XCTContext' in scope
66 |             scenario.lastExecutedStep = self
67 |             logic()
BUILD FAILURE 6.1 linux