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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 RRuleKit, reference v1.0.0 (6ab783), with Swift 6.1 for Linux on 30 Apr 2025 08:56:14 UTC.

Swift 6 data race errors: 0

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4606859-2":/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/kubens/RRuleKit.git
Reference: v1.0.0
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/kubens/RRuleKit
 * tag               v1.0.0     -> FETCH_HEAD
HEAD is now at 6ab783a RecurrenceRuleRFC5545FormatStyle (#1)
Cloned https://github.com/kubens/RRuleKit.git
Revision (git rev-parse @):
6ab783a022c09021cf307ebaeb588386a8bd07e3
SUCCESS checkout https://github.com/kubens/RRuleKit.git at v1.0.0
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/kubens/RRuleKit.git
https://github.com/kubens/RRuleKit.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "RRuleKit",
  "name" : "RRuleKit",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "18.0"
    },
    {
      "name" : "maccatalyst",
      "version" : "18.0"
    },
    {
      "name" : "macos",
      "version" : "15.0"
    },
    {
      "name" : "tvos",
      "version" : "18.0"
    },
    {
      "name" : "visionos",
      "version" : "2.0"
    },
    {
      "name" : "watchos",
      "version" : "11.0"
    }
  ],
  "products" : [
    {
      "name" : "RRuleKit",
      "targets" : [
        "RRuleKit"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "RRuleKitTests",
      "module_type" : "SwiftTarget",
      "name" : "RRuleKitTests",
      "path" : "Tests/RRuleKitTests",
      "sources" : [
        "RecurrenceRuleRFC5545FormatTests.swift",
        "RecurrenceRuleRFC5545ParseTests.swift"
      ],
      "target_dependencies" : [
        "RRuleKit"
      ],
      "type" : "test"
    },
    {
      "c99name" : "RRuleKit",
      "module_type" : "SwiftTarget",
      "name" : "RRuleKit",
      "path" : "Sources/RRuleKit",
      "product_memberships" : [
        "RRuleKit"
      ],
      "sources" : [
        "RecurrenceRule+FormatStyle.swift",
        "RecurrenceRuleRFC5545FormatStyle.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "6.0"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4606859-2":/host -w "$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
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-24593BA9C3E375BF.txt
[3/5] Compiling RRuleKit RecurrenceRule+FormatStyle.swift
[4/5] Compiling RRuleKit RecurrenceRuleRFC5545FormatStyle.swift
[5/5] Emitting module RRuleKit
Build complete! (7.66s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "RRuleKit",
  "name" : "RRuleKit",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "18.0"
    },
    {
      "name" : "maccatalyst",
      "version" : "18.0"
    },
    {
      "name" : "macos",
      "version" : "15.0"
    },
    {
      "name" : "tvos",
      "version" : "18.0"
    },
    {
      "name" : "visionos",
      "version" : "2.0"
    },
    {
      "name" : "watchos",
      "version" : "11.0"
    }
  ],
  "products" : [
    {
      "name" : "RRuleKit",
      "targets" : [
        "RRuleKit"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "RRuleKitTests",
      "module_type" : "SwiftTarget",
      "name" : "RRuleKitTests",
      "path" : "Tests/RRuleKitTests",
      "sources" : [
        "RecurrenceRuleRFC5545FormatTests.swift",
        "RecurrenceRuleRFC5545ParseTests.swift"
      ],
      "target_dependencies" : [
        "RRuleKit"
      ],
      "type" : "test"
    },
    {
      "c99name" : "RRuleKit",
      "module_type" : "SwiftTarget",
      "name" : "RRuleKit",
      "path" : "Sources/RRuleKit",
      "product_memberships" : [
        "RRuleKit"
      ],
      "sources" : [
        "RecurrenceRule+FormatStyle.swift",
        "RecurrenceRuleRFC5545FormatStyle.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.