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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 SwiftNiceScale, reference main (d33bff), with Swift 6.1 for Linux on 26 Apr 2025 18:15:05 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 -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/openalloc/SwiftNiceScale.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/openalloc/SwiftNiceScale
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at d33bff6 Simplify See Also section of README
Cloned https://github.com/openalloc/SwiftNiceScale.git
Revision (git rev-parse @):
d33bff64631c73bc79f04ccc473ddf64e12b4dba
SUCCESS checkout https://github.com/openalloc/SwiftNiceScale.git at main
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/openalloc/SwiftNiceScale.git
https://github.com/openalloc/SwiftNiceScale.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
    {
      "identity" : "swift-numerics",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-numerics"
    }
  ],
  "manifest_display_name" : "SwiftNiceScale",
  "name" : "SwiftNiceScale",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "NiceScale",
      "targets" : [
        "NiceScale"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "NiceScaleTests",
      "module_type" : "SwiftTarget",
      "name" : "NiceScaleTests",
      "path" : "Tests",
      "sources" : [
        "NiceScaleTests.swift"
      ],
      "target_dependencies" : [
        "NiceScale"
      ],
      "type" : "test"
    },
    {
      "c99name" : "NiceScale",
      "module_type" : "SwiftTarget",
      "name" : "NiceScale",
      "path" : "Sources",
      "product_dependencies" : [
        "Numerics"
      ],
      "product_memberships" : [
        "NiceScale"
      ],
      "sources" : [
        "NiceScale.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.7"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-1":/host -w "$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/apple/swift-numerics
[1/5674] Fetching swift-numerics
Fetched https://github.com/apple/swift-numerics from cache (0.38s)
Computing version for https://github.com/apple/swift-numerics
Computed https://github.com/apple/swift-numerics at 1.0.3 (0.86s)
Creating working copy for https://github.com/apple/swift-numerics
Working copy of https://github.com/apple/swift-numerics resolved at 1.0.3
Building for debugging...
[0/6] Write sources
[4/6] Compiling _NumericsShims _NumericsShims.c
[5/6] Write swift-version-24593BA9C3E375BF.txt
[7/16] Compiling RealModule Float80+Real.swift
[8/17] Compiling RealModule Real.swift
[9/17] Compiling RealModule RealFunctions.swift
[10/17] Compiling RealModule Float+Real.swift
[11/17] Compiling RealModule AugmentedArithmetic.swift
[12/17] Compiling RealModule Double+Real.swift
[13/17] Compiling RealModule AlgebraicField.swift
[14/17] Compiling RealModule ApproximateEquality.swift
[15/17] Emitting module RealModule
[16/17] Compiling RealModule ElementaryFunctions.swift
[17/17] Compiling RealModule Float16+Real.swift
[19/23] Compiling ComplexModule ElementaryFunctions.swift
[20/23] Compiling ComplexModule Complex.swift
[21/23] Compiling ComplexModule Differentiable.swift
[22/23] Compiling ComplexModule Arithmetic.swift
[23/23] Emitting module ComplexModule
[25/26] Emitting module Numerics
[26/26] Compiling Numerics Numerics.swift
[28/29] Compiling NiceScale NiceScale.swift
[29/29] Emitting module NiceScale
Build complete! (12.18s)
Build complete.
{
  "dependencies" : [
    {
      "identity" : "swift-numerics",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-numerics"
    }
  ],
  "manifest_display_name" : "SwiftNiceScale",
  "name" : "SwiftNiceScale",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "NiceScale",
      "targets" : [
        "NiceScale"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "NiceScaleTests",
      "module_type" : "SwiftTarget",
      "name" : "NiceScaleTests",
      "path" : "Tests",
      "sources" : [
        "NiceScaleTests.swift"
      ],
      "target_dependencies" : [
        "NiceScale"
      ],
      "type" : "test"
    },
    {
      "c99name" : "NiceScale",
      "module_type" : "SwiftTarget",
      "name" : "NiceScale",
      "path" : "Sources",
      "product_dependencies" : [
        "Numerics"
      ],
      "product_memberships" : [
        "NiceScale"
      ],
      "sources" : [
        "NiceScale.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.7"
}
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.