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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 combine-schedulers, reference 1.0.3 (592828), with Swift 6.1 for Linux on 29 Apr 2025 16:13:59 UTC.

Swift 6 data race errors: 0

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/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 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 4.61.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/pointfreeco/combine-schedulers.git
Reference: 1.0.3
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/pointfreeco/combine-schedulers
 * tag               1.0.3      -> FETCH_HEAD
HEAD is now at 5928286 Update Package@swift-6.0.swift (#98)
Cloned https://github.com/pointfreeco/combine-schedulers.git
Revision (git rev-parse @):
5928286acce13def418ec36d05a001a9641086f2
SUCCESS checkout https://github.com/pointfreeco/combine-schedulers.git at 1.0.3
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/pointfreeco/combine-schedulers.git
https://github.com/pointfreeco/combine-schedulers.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
    {
      "identity" : "swift-concurrency-extras",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/pointfreeco/swift-concurrency-extras"
    },
    {
      "identity" : "xctest-dynamic-overlay",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.2.2",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/pointfreeco/xctest-dynamic-overlay"
    }
  ],
  "manifest_display_name" : "combine-schedulers",
  "name" : "combine-schedulers",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "macos",
      "version" : "10.15"
    },
    {
      "name" : "tvos",
      "version" : "13.0"
    },
    {
      "name" : "watchos",
      "version" : "6.0"
    }
  ],
  "products" : [
    {
      "name" : "CombineSchedulers",
      "targets" : [
        "CombineSchedulers"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "6"
  ],
  "targets" : [
    {
      "c99name" : "CombineSchedulersTests",
      "module_type" : "SwiftTarget",
      "name" : "CombineSchedulersTests",
      "path" : "Tests/CombineSchedulersTests",
      "sources" : [
        "ImmediateSchedulerTests.swift",
        "TestSchedulerTests.swift",
        "TimerTests.swift",
        "UISchedulerTests.swift",
        "UnimplementedSchedulerTests.swift"
      ],
      "target_dependencies" : [
        "CombineSchedulers"
      ],
      "type" : "test"
    },
    {
      "c99name" : "CombineSchedulers",
      "module_type" : "SwiftTarget",
      "name" : "CombineSchedulers",
      "path" : "Sources/CombineSchedulers",
      "product_dependencies" : [
        "ConcurrencyExtras",
        "IssueReporting"
      ],
      "product_memberships" : [
        "CombineSchedulers"
      ],
      "sources" : [
        "AnyScheduler.swift",
        "Concurrency.swift",
        "ImmediateScheduler.swift",
        "Internal/Deprecations.swift",
        "Internal/Lock.swift",
        "Internal/NSRecursiveLock.swift",
        "SwiftUI.swift",
        "TestScheduler.swift",
        "Timer.swift",
        "UIKit.swift",
        "UIScheduler.swift",
        "UnimplementedScheduler.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "6.0"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/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 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/pointfreeco/xctest-dynamic-overlay
Fetching https://github.com/pointfreeco/swift-concurrency-extras
[1/852] Fetching swift-concurrency-extras
[853/6240] Fetching swift-concurrency-extras, xctest-dynamic-overlay
Fetched https://github.com/pointfreeco/swift-concurrency-extras from cache (0.57s)
Fetched https://github.com/pointfreeco/xctest-dynamic-overlay from cache (0.58s)
Computing version for https://github.com/pointfreeco/swift-concurrency-extras
Computed https://github.com/pointfreeco/swift-concurrency-extras at 1.3.1 (0.99s)
Computing version for https://github.com/pointfreeco/xctest-dynamic-overlay
Computed https://github.com/pointfreeco/xctest-dynamic-overlay at 1.5.2 (0.43s)
Creating working copy for https://github.com/pointfreeco/swift-concurrency-extras
Working copy of https://github.com/pointfreeco/swift-concurrency-extras resolved at 1.3.1
Creating working copy for https://github.com/pointfreeco/xctest-dynamic-overlay
Working copy of https://github.com/pointfreeco/xctest-dynamic-overlay resolved at 1.5.2
Building for debugging...
[0/4] Write sources
[3/4] Write swift-version-24593BA9C3E375BF.txt
[5/34] Emitting module ConcurrencyExtras
[6/35] Emitting module IssueReporting
[7/37] Compiling IssueReporting BreakpointReporter.swift
[8/37] Compiling IssueReporting FatalErrorReporter.swift
[9/37] Compiling IssueReporting TestContext.swift
[10/37] Compiling IssueReporting Unimplemented.swift
[11/37] Compiling ConcurrencyExtras UncheckedSendable.swift
[12/37] Compiling IssueReporting WithExpectedIssue.swift
[13/37] Compiling IssueReporting WithIssueContext.swift
[14/37] Compiling ConcurrencyExtras Result.swift
[15/37] Compiling ConcurrencyExtras Task.swift
[16/37] Compiling IssueReporting RuntimeWarningReporter.swift
[17/37] Compiling IssueReporting ReportIssue.swift
[18/37] Compiling IssueReporting FailureObserver.swift
[19/37] Compiling IssueReporting LockIsolated.swift
[20/37] Compiling IssueReporting Rethrows.swift
[21/37] Compiling IssueReporting UncheckedSendable.swift
[22/37] Compiling IssueReporting Warn.swift
[23/37] Compiling ConcurrencyExtras LockIsolated.swift
[26/37] Compiling ConcurrencyExtras MainSerialExecutor.swift
[28/37] Compiling IssueReporting SwiftTesting.swift
[30/38] Compiling IssueReporting XCTest.swift
[31/38] Compiling IssueReporting IsTesting.swift
[32/38] Compiling IssueReporting IssueReporter.swift
[36/38] Compiling IssueReporting ErrorReporting.swift
[37/38] Compiling IssueReporting AppHostWarning.swift
[38/38] Compiling IssueReporting Deprecations.swift
[40/51] Compiling CombineSchedulers ImmediateScheduler.swift
[41/51] Compiling CombineSchedulers Deprecations.swift
[42/52] Compiling CombineSchedulers UIScheduler.swift
[43/52] Emitting module CombineSchedulers
[44/52] Compiling CombineSchedulers AnyScheduler.swift
[45/52] Compiling CombineSchedulers Concurrency.swift
[46/52] Compiling CombineSchedulers SwiftUI.swift
[47/52] Compiling CombineSchedulers TestScheduler.swift
[48/52] Compiling CombineSchedulers UIKit.swift
[49/52] Compiling CombineSchedulers Timer.swift
[50/52] Compiling CombineSchedulers Lock.swift
[51/52] Compiling CombineSchedulers NSRecursiveLock.swift
[52/52] Compiling CombineSchedulers UnimplementedScheduler.swift
Build complete! (13.36s)
Build complete.
{
  "dependencies" : [
    {
      "identity" : "swift-concurrency-extras",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/pointfreeco/swift-concurrency-extras"
    },
    {
      "identity" : "xctest-dynamic-overlay",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.2.2",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/pointfreeco/xctest-dynamic-overlay"
    }
  ],
  "manifest_display_name" : "combine-schedulers",
  "name" : "combine-schedulers",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "13.0"
    },
    {
      "name" : "macos",
      "version" : "10.15"
    },
    {
      "name" : "tvos",
      "version" : "13.0"
    },
    {
      "name" : "watchos",
      "version" : "6.0"
    }
  ],
  "products" : [
    {
      "name" : "CombineSchedulers",
      "targets" : [
        "CombineSchedulers"
      ],
      "type" : {
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          "automatic"
        ]
      }
    }
  ],
  "swift_languages_versions" : [
    "6"
  ],
  "targets" : [
    {
      "c99name" : "CombineSchedulersTests",
      "module_type" : "SwiftTarget",
      "name" : "CombineSchedulersTests",
      "path" : "Tests/CombineSchedulersTests",
      "sources" : [
        "ImmediateSchedulerTests.swift",
        "TestSchedulerTests.swift",
        "TimerTests.swift",
        "UISchedulerTests.swift",
        "UnimplementedSchedulerTests.swift"
      ],
      "target_dependencies" : [
        "CombineSchedulers"
      ],
      "type" : "test"
    },
    {
      "c99name" : "CombineSchedulers",
      "module_type" : "SwiftTarget",
      "name" : "CombineSchedulers",
      "path" : "Sources/CombineSchedulers",
      "product_dependencies" : [
        "ConcurrencyExtras",
        "IssueReporting"
      ],
      "product_memberships" : [
        "CombineSchedulers"
      ],
      "sources" : [
        "AnyScheduler.swift",
        "Concurrency.swift",
        "ImmediateScheduler.swift",
        "Internal/Deprecations.swift",
        "Internal/Lock.swift",
        "Internal/NSRecursiveLock.swift",
        "SwiftUI.swift",
        "TestScheduler.swift",
        "Timer.swift",
        "UIKit.swift",
        "UIScheduler.swift",
        "UnimplementedScheduler.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "6.0"
}
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.