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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 Health, reference master (e175d8), with Swift 6.1 for Linux on 26 Apr 2025 03:58:42 UTC.

Swift 6 data race errors: 1

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 -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: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/Kitura/Health.git
Reference: master
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/Kitura/Health
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at e175d8a Update package reference to community versions (#18)
Cloned https://github.com/Kitura/Health.git
Revision (git rev-parse @):
e175d8a5c599d1d76ac8c5d5ec8a3a55f557c8b1
SUCCESS checkout https://github.com/Kitura/Health.git at master
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/Kitura/Health.git
https://github.com/Kitura/Health.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
    {
      "identity" : "loggerapi",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.9.200",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/Kitura/LoggerAPI.git"
    }
  ],
  "manifest_display_name" : "Health",
  "name" : "Health",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Health",
      "targets" : [
        "Health"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "HealthTests",
      "module_type" : "SwiftTarget",
      "name" : "HealthTests",
      "path" : "Tests/HealthTests",
      "sources" : [
        "HealthTests.swift"
      ],
      "target_dependencies" : [
        "Health"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Health",
      "module_type" : "SwiftTarget",
      "name" : "Health",
      "path" : "Sources/Health",
      "product_dependencies" : [
        "LoggerAPI"
      ],
      "product_memberships" : [
        "Health"
      ],
      "sources" : [
        "Health.swift",
        "Protocols.swift",
        "Utils.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/host -w "$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 -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
Fetching https://github.com/Kitura/LoggerAPI.git
[1/771] Fetching loggerapi
Fetched https://github.com/Kitura/LoggerAPI.git from cache (0.22s)
Computing version for https://github.com/Kitura/LoggerAPI.git
Computed https://github.com/Kitura/LoggerAPI.git at 1.9.200 (0.68s)
Fetching https://github.com/apple/swift-log.git
[1/3836] Fetching swift-log
Fetched https://github.com/apple/swift-log.git from cache (0.32s)
Computing version for https://github.com/apple/swift-log.git
Computed https://github.com/apple/swift-log.git at 1.6.3 (0.75s)
Creating working copy for https://github.com/Kitura/LoggerAPI.git
Working copy of https://github.com/Kitura/LoggerAPI.git resolved at 1.9.200
Creating working copy for https://github.com/apple/swift-log.git
Working copy of https://github.com/apple/swift-log.git resolved at 1.6.3
Building for debugging...
[0/4] Write sources
[3/4] Write swift-version-24593BA9C3E375BF.txt
[5/9] Emitting module Logging
[6/9] Compiling Logging LogHandler.swift
[7/9] Compiling Logging MetadataProvider.swift
[8/9] Compiling Logging Locks.swift
[9/9] Compiling Logging Logging.swift
[11/12] Compiling LoggerAPI Logger.swift
[12/12] Emitting module LoggerAPI
[14/17] Compiling Health Utils.swift
[15/17] Compiling Health Protocols.swift
/host/spi-builder-workspace/Sources/Health/Protocols.swift:83:21: warning: static property 'dateFormatter' is not concurrency-safe because non-'Sendable' type 'StatusDateFormatter' may have shared mutable state; this is an error in the Swift 6 language mode
 42 |
 43 | /// Struct that encapsulates a `DateFormatter` implementation, specifically used by the Status struct.
 44 | public class StatusDateFormatter {
    |              `- note: class 'StatusDateFormatter' does not conform to the 'Sendable' protocol
 45 |   private let dateFormatter: DateFormatter
 46 |
    :
 81 | public struct Status: Equatable {
 82 |   /// The date formatter used by the `Status` struct.
 83 |   public static let dateFormatter = StatusDateFormatter()
    |                     |- warning: static property 'dateFormatter' is not concurrency-safe because non-'Sendable' type 'StatusDateFormatter' may have shared mutable state; this is an error in the Swift 6 language mode
    |                     |- note: add '@MainActor' to make static property 'dateFormatter' part of global actor 'MainActor'
    |                     `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 84 |
 85 |   /// The date format used by the timestamp value in the dictionary.
[16/17] Emitting module Health
/host/spi-builder-workspace/Sources/Health/Protocols.swift:83:21: warning: static property 'dateFormatter' is not concurrency-safe because non-'Sendable' type 'StatusDateFormatter' may have shared mutable state; this is an error in the Swift 6 language mode
 42 |
 43 | /// Struct that encapsulates a `DateFormatter` implementation, specifically used by the Status struct.
 44 | public class StatusDateFormatter {
    |              `- note: class 'StatusDateFormatter' does not conform to the 'Sendable' protocol
 45 |   private let dateFormatter: DateFormatter
 46 |
    :
 81 | public struct Status: Equatable {
 82 |   /// The date formatter used by the `Status` struct.
 83 |   public static let dateFormatter = StatusDateFormatter()
    |                     |- warning: static property 'dateFormatter' is not concurrency-safe because non-'Sendable' type 'StatusDateFormatter' may have shared mutable state; this is an error in the Swift 6 language mode
    |                     |- note: add '@MainActor' to make static property 'dateFormatter' part of global actor 'MainActor'
    |                     `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 84 |
 85 |   /// The date format used by the timestamp value in the dictionary.
[17/17] Compiling Health Health.swift
Build complete! (9.78s)
Build complete.
{
  "dependencies" : [
    {
      "identity" : "loggerapi",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.9.200",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/Kitura/LoggerAPI.git"
    }
  ],
  "manifest_display_name" : "Health",
  "name" : "Health",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Health",
      "targets" : [
        "Health"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "HealthTests",
      "module_type" : "SwiftTarget",
      "name" : "HealthTests",
      "path" : "Tests/HealthTests",
      "sources" : [
        "HealthTests.swift"
      ],
      "target_dependencies" : [
        "Health"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Health",
      "module_type" : "SwiftTarget",
      "name" : "Health",
      "path" : "Sources/Health",
      "product_dependencies" : [
        "LoggerAPI"
      ],
      "product_memberships" : [
        "Health"
      ],
      "sources" : [
        "Health.swift",
        "Protocols.swift",
        "Utils.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
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.