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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 STTextKitPlus, reference 0.1.8 (446d6d), with Swift 6.1 for macOS (SPM) on 30 Apr 2025 09:30:43 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: 4.61.1
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/krzyzanowskim/STTextKitPlus.git
Reference: 0.1.8
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/krzyzanowskim/STTextKitPlus
 * tag               0.1.8      -> FETCH_HEAD
HEAD is now at 446d6d4 Add textElementsNotBuggy(for:) to NSTextContentManager
Cloned https://github.com/krzyzanowskim/STTextKitPlus.git
Revision (git rev-parse @):
446d6d431b163840ac5cc844ca5cf4704886c30e
SUCCESS checkout https://github.com/krzyzanowskim/STTextKitPlus.git at 0.1.8
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/krzyzanowskim/STTextKitPlus.git
https://github.com/krzyzanowskim/STTextKitPlus.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "STTextKitPlus",
  "name" : "STTextKitPlus",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "12.0"
    },
    {
      "name" : "maccatalyst",
      "version" : "15.0"
    },
    {
      "name" : "ios",
      "version" : "15.0"
    }
  ],
  "products" : [
    {
      "name" : "STTextKitPlus",
      "targets" : [
        "STTextKitPlus"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "STTextKitPlus",
      "module_type" : "SwiftTarget",
      "name" : "STTextKitPlus",
      "path" : "Sources/STTextKitPlus",
      "product_memberships" : [
        "STTextKitPlus"
      ],
      "sources" : [
        "NSRange.swift",
        "NSTextContentManager.swift",
        "NSTextLayoutFragment.swift",
        "NSTextLayoutManager.swift",
        "NSTextLineFragment.swift",
        "NSTextLocation+Equatable.swift",
        "NSTextRange.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.7"
}
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
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-2F0A5646E1D333AE.txt
[3/10] Compiling STTextKitPlus NSTextRange.swift
[4/10] Compiling STTextKitPlus NSTextLocation+Equatable.swift
[5/10] Compiling STTextKitPlus NSTextLineFragment.swift
[6/10] Compiling STTextKitPlus NSTextLayoutFragment.swift
[7/10] Compiling STTextKitPlus NSRange.swift
[8/10] Emitting module STTextKitPlus
<unknown>:0: note: a function type must be marked '@Sendable' to conform to 'Sendable'
/Users/admin/builder/spi-builder-workspace/Sources/STTextKitPlus/NSTextLayoutManager.swift:184:13: warning: let '_textSelectionInsertionPointFilter' is not concurrency-safe because non-'Sendable' type '(NSTextSelection) -> Bool' may have shared mutable state; this is an error in the Swift 6 language mode
182 | }
183 |
184 | private let _textSelectionInsertionPointFilter: (NSTextSelection) -> Bool = { textSelection in
    |             |- warning: let '_textSelectionInsertionPointFilter' is not concurrency-safe because non-'Sendable' type '(NSTextSelection) -> Bool' may have shared mutable state; this is an error in the Swift 6 language mode
    |             |- note: add '@MainActor' to make let '_textSelectionInsertionPointFilter' part of global actor 'MainActor'
    |             `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
185 |     !textSelection.isLogical && textSelection.textRanges.contains(where: \.isEmpty)
186 | }
[9/10] Compiling STTextKitPlus NSTextLayoutManager.swift
<unknown>:0: note: a function type must be marked '@Sendable' to conform to 'Sendable'
/Users/admin/builder/spi-builder-workspace/Sources/STTextKitPlus/NSTextLayoutManager.swift:184:13: warning: let '_textSelectionInsertionPointFilter' is not concurrency-safe because non-'Sendable' type '(NSTextSelection) -> Bool' may have shared mutable state; this is an error in the Swift 6 language mode
182 | }
183 |
184 | private let _textSelectionInsertionPointFilter: (NSTextSelection) -> Bool = { textSelection in
    |             |- warning: let '_textSelectionInsertionPointFilter' is not concurrency-safe because non-'Sendable' type '(NSTextSelection) -> Bool' may have shared mutable state; this is an error in the Swift 6 language mode
    |             |- note: add '@MainActor' to make let '_textSelectionInsertionPointFilter' part of global actor 'MainActor'
    |             `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
185 |     !textSelection.isLogical && textSelection.textRanges.contains(where: \.isEmpty)
186 | }
[10/10] Compiling STTextKitPlus NSTextContentManager.swift
Build complete! (8.24s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "STTextKitPlus",
  "name" : "STTextKitPlus",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "12.0"
    },
    {
      "name" : "maccatalyst",
      "version" : "15.0"
    },
    {
      "name" : "ios",
      "version" : "15.0"
    }
  ],
  "products" : [
    {
      "name" : "STTextKitPlus",
      "targets" : [
        "STTextKitPlus"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "STTextKitPlus",
      "module_type" : "SwiftTarget",
      "name" : "STTextKitPlus",
      "path" : "Sources/STTextKitPlus",
      "product_memberships" : [
        "STTextKitPlus"
      ],
      "sources" : [
        "NSRange.swift",
        "NSTextContentManager.swift",
        "NSTextLayoutFragment.swift",
        "NSTextLayoutManager.swift",
        "NSTextLineFragment.swift",
        "NSTextLocation+Equatable.swift",
        "NSTextRange.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.7"
}
Done.