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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 SigmaSwiftStatistics, reference master (35b231), with Swift 6.1 for Linux on 25 Apr 2025 14:27:28 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/evgenyneu/SigmaSwiftStatistics.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/evgenyneu/SigmaSwiftStatistics
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 35b2318 Swift package manager
Cloned https://github.com/evgenyneu/SigmaSwiftStatistics.git
Revision (git rev-parse @):
35b231856e175119ac3030d32a0366f7e266726b
SUCCESS checkout https://github.com/evgenyneu/SigmaSwiftStatistics.git at master
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/evgenyneu/SigmaSwiftStatistics.git
https://github.com/evgenyneu/SigmaSwiftStatistics.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "SigmaSwiftStatistics",
  "name" : "SigmaSwiftStatistics",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "SigmaSwiftStatistics",
      "targets" : [
        "SigmaSwiftStatistics"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SigmaSwiftStatistics",
      "module_type" : "SwiftTarget",
      "name" : "SigmaSwiftStatistics",
      "path" : "SigmaSwiftStatistics",
      "product_memberships" : [
        "SigmaSwiftStatistics"
      ],
      "sources" : [
        "CentralMoment.swift",
        "CoefficientVariation.swift",
        "Covariance.swift",
        "Frequencies.swift",
        "Kurtosis.swift",
        "Median.swift",
        "Normal.swift",
        "Pearson.swift",
        "Percentile.swift",
        "Quantiles.swift",
        "Rank.swift",
        "Sigma.swift",
        "Skewness.swift",
        "StandardDeviation.swift",
        "StandardErrorOfTheMean.swift",
        "UniqueValues.swift",
        "Variance.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.0"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/host -w "$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
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-24593BA9C3E375BF.txt
[3/18] Compiling SigmaSwiftStatistics StandardDeviation.swift
[4/18] Compiling SigmaSwiftStatistics StandardErrorOfTheMean.swift
[5/20] Emitting module SigmaSwiftStatistics
/host/spi-builder-workspace/SigmaSwiftStatistics/Quantiles.swift:22:14: warning: static property 'quantiles' is not concurrency-safe because non-'Sendable' type 'SigmaQuantiles' may have shared mutable state; this is an error in the Swift 6 language mode
 20 |
 21 |   */
 22 |   static let quantiles = SigmaQuantiles()
    |              |- warning: static property 'quantiles' is not concurrency-safe because non-'Sendable' type 'SigmaQuantiles' may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: add '@MainActor' to make static property 'quantiles' part of global actor 'MainActor'
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 23 | }
 24 |
 25 | public class SigmaQuantiles {
    |              `- note: class 'SigmaQuantiles' does not conform to the 'Sendable' protocol
 26 |   /*
 27 |
[6/20] Compiling SigmaSwiftStatistics Sigma.swift
[7/20] Compiling SigmaSwiftStatistics Skewness.swift
[8/20] Compiling SigmaSwiftStatistics UniqueValues.swift
[9/20] Compiling SigmaSwiftStatistics Variance.swift
[10/20] Compiling SigmaSwiftStatistics Frequencies.swift
[11/20] Compiling SigmaSwiftStatistics Kurtosis.swift
[12/20] Compiling SigmaSwiftStatistics Quantiles.swift
/host/spi-builder-workspace/SigmaSwiftStatistics/Quantiles.swift:22:14: warning: static property 'quantiles' is not concurrency-safe because non-'Sendable' type 'SigmaQuantiles' may have shared mutable state; this is an error in the Swift 6 language mode
 20 |
 21 |   */
 22 |   static let quantiles = SigmaQuantiles()
    |              |- warning: static property 'quantiles' is not concurrency-safe because non-'Sendable' type 'SigmaQuantiles' may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: add '@MainActor' to make static property 'quantiles' part of global actor 'MainActor'
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 23 | }
 24 |
 25 | public class SigmaQuantiles {
    |              `- note: class 'SigmaQuantiles' does not conform to the 'Sendable' protocol
 26 |   /*
 27 |
[13/20] Compiling SigmaSwiftStatistics Rank.swift
/host/spi-builder-workspace/SigmaSwiftStatistics/Quantiles.swift:22:14: warning: static property 'quantiles' is not concurrency-safe because non-'Sendable' type 'SigmaQuantiles' may have shared mutable state; this is an error in the Swift 6 language mode
 20 |
 21 |   */
 22 |   static let quantiles = SigmaQuantiles()
    |              |- warning: static property 'quantiles' is not concurrency-safe because non-'Sendable' type 'SigmaQuantiles' may have shared mutable state; this is an error in the Swift 6 language mode
    |              |- note: add '@MainActor' to make static property 'quantiles' part of global actor 'MainActor'
    |              `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 23 | }
 24 |
 25 | public class SigmaQuantiles {
    |              `- note: class 'SigmaQuantiles' does not conform to the 'Sendable' protocol
 26 |   /*
 27 |
[14/20] Compiling SigmaSwiftStatistics CentralMoment.swift
[15/20] Compiling SigmaSwiftStatistics CoefficientVariation.swift
[16/20] Compiling SigmaSwiftStatistics Covariance.swift
[17/20] Compiling SigmaSwiftStatistics Pearson.swift
[18/20] Compiling SigmaSwiftStatistics Percentile.swift
[19/20] Compiling SigmaSwiftStatistics Median.swift
[20/20] Compiling SigmaSwiftStatistics Normal.swift
Build complete! (14.34s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "SigmaSwiftStatistics",
  "name" : "SigmaSwiftStatistics",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "SigmaSwiftStatistics",
      "targets" : [
        "SigmaSwiftStatistics"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "SigmaSwiftStatistics",
      "module_type" : "SwiftTarget",
      "name" : "SigmaSwiftStatistics",
      "path" : "SigmaSwiftStatistics",
      "product_memberships" : [
        "SigmaSwiftStatistics"
      ],
      "sources" : [
        "CentralMoment.swift",
        "CoefficientVariation.swift",
        "Covariance.swift",
        "Frequencies.swift",
        "Kurtosis.swift",
        "Median.swift",
        "Normal.swift",
        "Pearson.swift",
        "Percentile.swift",
        "Quantiles.swift",
        "Rank.swift",
        "Sigma.swift",
        "Skewness.swift",
        "StandardDeviation.swift",
        "StandardErrorOfTheMean.swift",
        "UniqueValues.swift",
        "Variance.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.0"
}
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.