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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 Mustache, reference develop (e06544), with Swift 6.1 for Linux on 29 Apr 2025 14:50:00 UTC.

Swift 6 data race errors: 0

Build Command

bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/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: 4.61.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/AlwaysRightInstitute/mustache.git
Reference: develop
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/AlwaysRightInstitute/mustache
 * branch            develop    -> FETCH_HEAD
 * [new branch]      develop    -> origin/develop
HEAD is now at e065448 Push value to context for non-list sections
Cloned https://github.com/AlwaysRightInstitute/mustache.git
Revision (git rev-parse @):
e0654482a34a5610724a0e5451507c04712adcff
SUCCESS checkout https://github.com/AlwaysRightInstitute/mustache.git at develop
========================================
Build
========================================
Selected platform:         linux
Swift version:             6.1
Building package at path:  $PWD
https://github.com/AlwaysRightInstitute/mustache.git
https://github.com/AlwaysRightInstitute/mustache.git
WARNING: environment variable SUPPRESS_SWIFT_6_FLAGS is not set
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Mustache",
  "name" : "Mustache",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Mustache",
      "targets" : [
        "Mustache"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "AttributedMustache",
      "targets" : [
        "AttributedMustache"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "MustacheTests",
      "module_type" : "SwiftTarget",
      "name" : "MustacheTests",
      "path" : "Tests/MustacheTests",
      "sources" : [
        "AttributedMustacheTests.swift",
        "MustacheTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "Mustache",
        "AttributedMustache"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Mustache",
      "module_type" : "SwiftTarget",
      "name" : "Mustache",
      "path" : "Sources/Mustache",
      "product_memberships" : [
        "Mustache",
        "AttributedMustache"
      ],
      "sources" : [
        "HTMLEscape.swift",
        "Helpers.swift",
        "Mustachable.swift",
        "MustacheNode.swift",
        "MustacheParser.swift",
        "MustacheRendering.swift",
        "MustacheRenderingContext.swift",
        "SimpleKVC.swift"
      ],
      "type" : "library"
    },
    {
      "c99name" : "AttributedMustache",
      "module_type" : "SwiftTarget",
      "name" : "AttributedMustache",
      "path" : "Sources/AttributedMustache",
      "product_memberships" : [
        "AttributedMustache"
      ],
      "sources" : [
        "AttributedMustacheNode.swift",
        "AttributedMustacheParser.swift",
        "AttributedMustacheRendering.swift",
        "AttributedMustacheRenderingContext.swift",
        "ReExports.swift"
      ],
      "target_dependencies" : [
        "Mustache"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-0":/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...
[0/3] Write sources
[2/3] Write swift-version-24593BA9C3E375BF.txt
[4/11] Compiling Mustache MustacheRenderingContext.swift
[5/12] Compiling Mustache MustacheRendering.swift
[6/12] Emitting module Mustache
[7/12] Compiling Mustache MustacheNode.swift
[8/12] Compiling Mustache MustacheParser.swift
[9/12] Compiling Mustache Helpers.swift
[10/12] Compiling Mustache Mustachable.swift
[11/12] Compiling Mustache HTMLEscape.swift
[12/12] Compiling Mustache SimpleKVC.swift
[14/19] Compiling AttributedMustache ReExports.swift
[15/19] Compiling AttributedMustache AttributedMustacheRenderingContext.swift
[16/19] Compiling AttributedMustache AttributedMustacheRendering.swift
[17/19] Emitting module AttributedMustache
[18/19] Compiling AttributedMustache AttributedMustacheParser.swift
[19/19] Compiling AttributedMustache AttributedMustacheNode.swift
Build complete! (6.01s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Mustache",
  "name" : "Mustache",
  "path" : "/host/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Mustache",
      "targets" : [
        "Mustache"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    },
    {
      "name" : "AttributedMustache",
      "targets" : [
        "AttributedMustache"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "MustacheTests",
      "module_type" : "SwiftTarget",
      "name" : "MustacheTests",
      "path" : "Tests/MustacheTests",
      "sources" : [
        "AttributedMustacheTests.swift",
        "MustacheTests.swift",
        "XCTestManifests.swift"
      ],
      "target_dependencies" : [
        "Mustache",
        "AttributedMustache"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Mustache",
      "module_type" : "SwiftTarget",
      "name" : "Mustache",
      "path" : "Sources/Mustache",
      "product_memberships" : [
        "Mustache",
        "AttributedMustache"
      ],
      "sources" : [
        "HTMLEscape.swift",
        "Helpers.swift",
        "Mustachable.swift",
        "MustacheNode.swift",
        "MustacheParser.swift",
        "MustacheRendering.swift",
        "MustacheRenderingContext.swift",
        "SimpleKVC.swift"
      ],
      "type" : "library"
    },
    {
      "c99name" : "AttributedMustache",
      "module_type" : "SwiftTarget",
      "name" : "AttributedMustache",
      "path" : "Sources/AttributedMustache",
      "product_memberships" : [
        "AttributedMustache"
      ],
      "sources" : [
        "AttributedMustacheNode.swift",
        "AttributedMustacheParser.swift",
        "AttributedMustacheRendering.swift",
        "AttributedMustacheRenderingContext.swift",
        "ReExports.swift"
      ],
      "target_dependencies" : [
        "Mustache"
      ],
      "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.