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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 Restore, reference 0.0.1 (4f66ed), with Swift 6.1 for macOS (SPM) on 27 Apr 2025 04:53:13 UTC.

Swift 6 data race errors: 1

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64 -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

Build Log

========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/jordanbaird/Restore.git
Reference: 0.0.1
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/jordanbaird/Restore
 * tag               0.0.1      -> FETCH_HEAD
HEAD is now at 4f66ed0 Release 0.0.1
Cloned https://github.com/jordanbaird/Restore.git
Revision (git rev-parse @):
4f66ed0dd044590cc377111dce75a629e7a2163f
SUCCESS checkout https://github.com/jordanbaird/Restore.git at 0.0.1
Fetching https://github.com/apple/swift-docc-plugin
[1/2049] Fetching swift-docc-plugin
Fetched https://github.com/apple/swift-docc-plugin from cache (1.16s)
Computing version for https://github.com/apple/swift-docc-plugin
Computed https://github.com/apple/swift-docc-plugin at 1.0.0 (1.82s)
Creating working copy for https://github.com/apple/swift-docc-plugin
Working copy of https://github.com/apple/swift-docc-plugin resolved at 1.0.0
========================================
ResolveProductDependencies
========================================
Resolving dependencies ...
{
  "identity": ".resolve-product-dependencies",
  "name": "resolve-dependencies",
  "url": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "version": "unspecified",
  "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies",
  "dependencies": [
    {
      "identity": "restore",
      "name": "Restore",
      "url": "https://github.com/jordanbaird/Restore.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Restore",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/jordanbaird/Restore.git
[1/406] Fetching restore
Fetched https://github.com/jordanbaird/Restore.git from cache (0.78s)
Creating working copy for https://github.com/jordanbaird/Restore.git
Working copy of https://github.com/jordanbaird/Restore.git resolved at 0.0.1 (4f66ed0)
warning: '.resolve-product-dependencies': dependency 'restore' is not used by any target
Found 0 product dependencies
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/jordanbaird/Restore.git
https://github.com/jordanbaird/Restore.git
{
  "dependencies" : [
    {
      "identity" : "swift-docc-plugin",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-docc-plugin"
    }
  ],
  "manifest_display_name" : "Restore",
  "name" : "Restore",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Restore",
      "targets" : [
        "Restore"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "RestoreTests",
      "module_type" : "SwiftTarget",
      "name" : "RestoreTests",
      "path" : "Tests/RestoreTests",
      "sources" : [
        "PropertiesTests.swift",
        "RestorableTests.swift"
      ],
      "target_dependencies" : [
        "Restore"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Restore",
      "module_type" : "SwiftTarget",
      "name" : "Restore",
      "path" : "Sources/Restore",
      "product_memberships" : [
        "Restore"
      ],
      "sources" : [
        "ErrorHandling.swift",
        "Identity.swift",
        "Properties.swift",
        "Reference.swift",
        "Restorable.swift",
        "RestorableObject.swift",
        "RestorationKey.swift",
        "Snapshot.swift",
        "Utilities.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.6"
}
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.3.0.app xcrun swift build --arch arm64 -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
[1/1] Compiling plugin Swift-DocC Preview
[2/2] Compiling plugin Swift-DocC
Building for debugging...
[2/4] Write sources
[3/4] Write swift-version-2F0A5646E1D333AE.txt
[5/14] Compiling Restore Utilities.swift
[6/14] Compiling Restore Snapshot.swift
[7/14] Compiling Restore Reference.swift
[8/14] Compiling Restore RestorableObject.swift
/Users/admin/builder/spi-builder-workspace/Sources/Restore/RestorableObject.swift:9:5: warning: var 'storage' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
  7 | //===----------------------------------------------------------------------===//
  8 |
  9 | var storage = [Identifier: [RestorationKey: AnySnapshot]]()
    |     |- warning: var 'storage' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |     |- note: convert 'storage' to a 'let' constant to make 'Sendable' shared state immutable
    |     |- note: add '@MainActor' to make var 'storage' part of global actor 'MainActor'
    |     `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 10 |
 11 | /// A type that can be stored and restored from a snapshot.
[9/14] Compiling Restore RestorationKey.swift
[10/14] Compiling Restore Properties.swift
[11/14] Compiling Restore Restorable.swift
[12/14] Compiling Restore Identity.swift
[13/14] Emitting module Restore
/Users/admin/builder/spi-builder-workspace/Sources/Restore/RestorableObject.swift:9:5: warning: var 'storage' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
  7 | //===----------------------------------------------------------------------===//
  8 |
  9 | var storage = [Identifier: [RestorationKey: AnySnapshot]]()
    |     |- warning: var 'storage' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |     |- note: convert 'storage' to a 'let' constant to make 'Sendable' shared state immutable
    |     |- note: add '@MainActor' to make var 'storage' part of global actor 'MainActor'
    |     `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
 10 |
 11 | /// A type that can be stored and restored from a snapshot.
[14/14] Compiling Restore ErrorHandling.swift
Build complete! (7.65s)
Build complete.
{
  "dependencies" : [
    {
      "identity" : "swift-docc-plugin",
      "requirement" : {
        "range" : [
          {
            "lower_bound" : "1.0.0",
            "upper_bound" : "2.0.0"
          }
        ]
      },
      "type" : "sourceControl",
      "url" : "https://github.com/apple/swift-docc-plugin"
    }
  ],
  "manifest_display_name" : "Restore",
  "name" : "Restore",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "Restore",
      "targets" : [
        "Restore"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "RestoreTests",
      "module_type" : "SwiftTarget",
      "name" : "RestoreTests",
      "path" : "Tests/RestoreTests",
      "sources" : [
        "PropertiesTests.swift",
        "RestorableTests.swift"
      ],
      "target_dependencies" : [
        "Restore"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Restore",
      "module_type" : "SwiftTarget",
      "name" : "Restore",
      "path" : "Sources/Restore",
      "product_memberships" : [
        "Restore"
      ],
      "sources" : [
        "ErrorHandling.swift",
        "Identity.swift",
        "Properties.swift",
        "Reference.swift",
        "Restorable.swift",
        "RestorableObject.swift",
        "RestorationKey.swift",
        "Snapshot.swift",
        "Utilities.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.6"
}
Done.