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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 LetterCase with Swift 6.0 for macOS (SPM).

Swift 6 data race errors: 3

Build Command

env DEVELOPER_DIR=/Applications/Xcode-15.3.0.app xcrun --toolchain org.swift.600202405261a swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete

Build Log

========================================
RunAll
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Builder version: 4.40.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/rwbutler/LetterCase.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/rwbutler/LetterCase
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 03589da Release 1.6.1
Cloned https://github.com/rwbutler/LetterCase.git
Revision (git rev-parse @):
03589da8c6554655b276ba187cfc1cd35ad711d2
SUCCESS checkout https://github.com/rwbutler/LetterCase.git at master
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $workDir
https://github.com/rwbutler/LetterCase.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-15.3.0.app xcrun --toolchain org.swift.600202405261a swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete
Building for debugging...
[0/2] Write sources
[1/2] Write swift-version-6F35C1178C84523A.txt
[3/7] Compiling LetterCase LetterCaseOptions.swift
/Users/admin/builder/spi-builder-workspace/LetterCase/Classes/LetterCaseOptions.swift:13:23: warning: static property 'preserveSuffix' is not concurrency-safe because non-'Sendable' type 'LetterCaseOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 8 | import Foundation
 9 |
10 | public struct LetterCaseOptions: OptionSet {
   |               `- note: consider making struct 'LetterCaseOptions' conform to the 'Sendable' protocol
11 |     public let rawValue: Int
12 |
13 |     public static let preserveSuffix       = LetterCaseOptions(rawValue: 1 << 0)
   |                       |- warning: static property 'preserveSuffix' is not concurrency-safe because non-'Sendable' type 'LetterCaseOptions' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: annotate 'preserveSuffix' with '@MainActor' if property should only be accessed from the main actor
   |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
14 |     public static let preservePunctuation  = LetterCaseOptions(rawValue: 1 << 1)
15 |     public static let stripPunctuation     = LetterCaseOptions(rawValue: 1 << 2)
/Users/admin/builder/spi-builder-workspace/LetterCase/Classes/LetterCaseOptions.swift:14:23: warning: static property 'preservePunctuation' is not concurrency-safe because non-'Sendable' type 'LetterCaseOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 8 | import Foundation
 9 |
10 | public struct LetterCaseOptions: OptionSet {
   |               `- note: consider making struct 'LetterCaseOptions' conform to the 'Sendable' protocol
11 |     public let rawValue: Int
12 |
13 |     public static let preserveSuffix       = LetterCaseOptions(rawValue: 1 << 0)
14 |     public static let preservePunctuation  = LetterCaseOptions(rawValue: 1 << 1)
   |                       |- warning: static property 'preservePunctuation' is not concurrency-safe because non-'Sendable' type 'LetterCaseOptions' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: annotate 'preservePunctuation' with '@MainActor' if property should only be accessed from the main actor
   |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
15 |     public static let stripPunctuation     = LetterCaseOptions(rawValue: 1 << 2)
16 |
/Users/admin/builder/spi-builder-workspace/LetterCase/Classes/LetterCaseOptions.swift:15:23: warning: static property 'stripPunctuation' is not concurrency-safe because non-'Sendable' type 'LetterCaseOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 8 | import Foundation
 9 |
10 | public struct LetterCaseOptions: OptionSet {
   |               `- note: consider making struct 'LetterCaseOptions' conform to the 'Sendable' protocol
11 |     public let rawValue: Int
12 |
13 |     public static let preserveSuffix       = LetterCaseOptions(rawValue: 1 << 0)
14 |     public static let preservePunctuation  = LetterCaseOptions(rawValue: 1 << 1)
15 |     public static let stripPunctuation     = LetterCaseOptions(rawValue: 1 << 2)
   |                       |- warning: static property 'stripPunctuation' is not concurrency-safe because non-'Sendable' type 'LetterCaseOptions' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: annotate 'stripPunctuation' with '@MainActor' if property should only be accessed from the main actor
   |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
16 |
17 |     public init(rawValue: Int) {
[4/7] Compiling LetterCase KeyDecodingStrategyAdditions.swift
/Users/admin/builder/spi-builder-workspace/LetterCase/Classes/KeyDecodingStrategyAdditions.swift:65:70: warning: capture of 'letterCase' with non-sendable type 'LetterCase' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 63 |                 return lastKey
 64 |             }
 65 |             let newLetterCaseKey = lastKey.stringValue.convert(from: letterCase, to: newLetterCase)
    |                                                                      `- warning: capture of 'letterCase' with non-sendable type 'LetterCase' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 66 |             return AnyKey(string: newLetterCaseKey)
 67 |         }
/Users/admin/builder/spi-builder-workspace/LetterCase/Classes/LetterCase.swift:10:13: note: consider making enum 'LetterCase' conform to the 'Sendable' protocol
 8 | import Foundation
 9 |
10 | public enum LetterCase: String {
   |             `- note: consider making enum 'LetterCase' conform to the 'Sendable' protocol
11 |
12 |     public typealias Options = LetterCaseOptions
/Users/admin/builder/spi-builder-workspace/LetterCase/Classes/KeyDecodingStrategyAdditions.swift:65:86: warning: capture of 'newLetterCase' with non-sendable type 'LetterCase' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 63 |                 return lastKey
 64 |             }
 65 |             let newLetterCaseKey = lastKey.stringValue.convert(from: letterCase, to: newLetterCase)
    |                                                                                      `- warning: capture of 'newLetterCase' with non-sendable type 'LetterCase' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 66 |             return AnyKey(string: newLetterCaseKey)
 67 |         }
/Users/admin/builder/spi-builder-workspace/LetterCase/Classes/LetterCase.swift:10:13: note: consider making enum 'LetterCase' conform to the 'Sendable' protocol
 8 | import Foundation
 9 |
10 | public enum LetterCase: String {
   |             `- note: consider making enum 'LetterCase' conform to the 'Sendable' protocol
11 |
12 |     public typealias Options = LetterCaseOptions
/Users/admin/builder/spi-builder-workspace/LetterCase/Classes/KeyDecodingStrategyAdditions.swift:107:70: warning: capture of 'letterCase' with non-sendable type 'LetterCase' in a `@Sendable` closure; this is an error in the Swift 6 language mode
105 |                 return lastKey
106 |             }
107 |             let newLetterCaseKey = lastKey.stringValue.convert(from: letterCase, to: newLetterCase)
    |                                                                      `- warning: capture of 'letterCase' with non-sendable type 'LetterCase' in a `@Sendable` closure; this is an error in the Swift 6 language mode
108 |             return AnyKey(string: newLetterCaseKey)
109 |         }
/Users/admin/builder/spi-builder-workspace/LetterCase/Classes/LetterCase.swift:10:13: note: consider making enum 'LetterCase' conform to the 'Sendable' protocol
 8 | import Foundation
 9 |
10 | public enum LetterCase: String {
   |             `- note: consider making enum 'LetterCase' conform to the 'Sendable' protocol
11 |
12 |     public typealias Options = LetterCaseOptions
/Users/admin/builder/spi-builder-workspace/LetterCase/Classes/KeyDecodingStrategyAdditions.swift:107:86: warning: capture of 'newLetterCase' with non-sendable type 'LetterCase' in a `@Sendable` closure; this is an error in the Swift 6 language mode
105 |                 return lastKey
106 |             }
107 |             let newLetterCaseKey = lastKey.stringValue.convert(from: letterCase, to: newLetterCase)
    |                                                                                      `- warning: capture of 'newLetterCase' with non-sendable type 'LetterCase' in a `@Sendable` closure; this is an error in the Swift 6 language mode
108 |             return AnyKey(string: newLetterCaseKey)
109 |         }
/Users/admin/builder/spi-builder-workspace/LetterCase/Classes/LetterCase.swift:10:13: note: consider making enum 'LetterCase' conform to the 'Sendable' protocol
 8 | import Foundation
 9 |
10 | public enum LetterCase: String {
   |             `- note: consider making enum 'LetterCase' conform to the 'Sendable' protocol
11 |
12 |     public typealias Options = LetterCaseOptions
[5/7] Compiling LetterCase LetterCase.swift
[6/7] Compiling LetterCase StringAdditions.swift
/Users/admin/builder/spi-builder-workspace/LetterCase/Classes/LetterCaseOptions.swift:15:23: warning: static property 'stripPunctuation' is not concurrency-safe because non-'Sendable' type 'LetterCaseOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 8 | import Foundation
 9 |
10 | public struct LetterCaseOptions: OptionSet {
   |               `- note: consider making struct 'LetterCaseOptions' conform to the 'Sendable' protocol
11 |     public let rawValue: Int
12 |
13 |     public static let preserveSuffix       = LetterCaseOptions(rawValue: 1 << 0)
14 |     public static let preservePunctuation  = LetterCaseOptions(rawValue: 1 << 1)
15 |     public static let stripPunctuation     = LetterCaseOptions(rawValue: 1 << 2)
   |                       |- warning: static property 'stripPunctuation' is not concurrency-safe because non-'Sendable' type 'LetterCaseOptions' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: annotate 'stripPunctuation' with '@MainActor' if property should only be accessed from the main actor
   |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
16 |
17 |     public init(rawValue: Int) {
/Users/admin/builder/spi-builder-workspace/LetterCase/Classes/LetterCaseOptions.swift:14:23: warning: static property 'preservePunctuation' is not concurrency-safe because non-'Sendable' type 'LetterCaseOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 8 | import Foundation
 9 |
10 | public struct LetterCaseOptions: OptionSet {
   |               `- note: consider making struct 'LetterCaseOptions' conform to the 'Sendable' protocol
11 |     public let rawValue: Int
12 |
13 |     public static let preserveSuffix       = LetterCaseOptions(rawValue: 1 << 0)
14 |     public static let preservePunctuation  = LetterCaseOptions(rawValue: 1 << 1)
   |                       |- warning: static property 'preservePunctuation' is not concurrency-safe because non-'Sendable' type 'LetterCaseOptions' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: annotate 'preservePunctuation' with '@MainActor' if property should only be accessed from the main actor
   |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
15 |     public static let stripPunctuation     = LetterCaseOptions(rawValue: 1 << 2)
16 |
/Users/admin/builder/spi-builder-workspace/LetterCase/Classes/LetterCaseOptions.swift:13:23: warning: static property 'preserveSuffix' is not concurrency-safe because non-'Sendable' type 'LetterCaseOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 8 | import Foundation
 9 |
10 | public struct LetterCaseOptions: OptionSet {
   |               `- note: consider making struct 'LetterCaseOptions' conform to the 'Sendable' protocol
11 |     public let rawValue: Int
12 |
13 |     public static let preserveSuffix       = LetterCaseOptions(rawValue: 1 << 0)
   |                       |- warning: static property 'preserveSuffix' is not concurrency-safe because non-'Sendable' type 'LetterCaseOptions' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: annotate 'preserveSuffix' with '@MainActor' if property should only be accessed from the main actor
   |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
14 |     public static let preservePunctuation  = LetterCaseOptions(rawValue: 1 << 1)
15 |     public static let stripPunctuation     = LetterCaseOptions(rawValue: 1 << 2)
[7/7] Emitting module LetterCase
/Users/admin/builder/spi-builder-workspace/LetterCase/Classes/LetterCaseOptions.swift:13:23: warning: static property 'preserveSuffix' is not concurrency-safe because non-'Sendable' type 'LetterCaseOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 8 | import Foundation
 9 |
10 | public struct LetterCaseOptions: OptionSet {
   |               `- note: consider making struct 'LetterCaseOptions' conform to the 'Sendable' protocol
11 |     public let rawValue: Int
12 |
13 |     public static let preserveSuffix       = LetterCaseOptions(rawValue: 1 << 0)
   |                       |- warning: static property 'preserveSuffix' is not concurrency-safe because non-'Sendable' type 'LetterCaseOptions' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: annotate 'preserveSuffix' with '@MainActor' if property should only be accessed from the main actor
   |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
14 |     public static let preservePunctuation  = LetterCaseOptions(rawValue: 1 << 1)
15 |     public static let stripPunctuation     = LetterCaseOptions(rawValue: 1 << 2)
/Users/admin/builder/spi-builder-workspace/LetterCase/Classes/LetterCaseOptions.swift:14:23: warning: static property 'preservePunctuation' is not concurrency-safe because non-'Sendable' type 'LetterCaseOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 8 | import Foundation
 9 |
10 | public struct LetterCaseOptions: OptionSet {
   |               `- note: consider making struct 'LetterCaseOptions' conform to the 'Sendable' protocol
11 |     public let rawValue: Int
12 |
13 |     public static let preserveSuffix       = LetterCaseOptions(rawValue: 1 << 0)
14 |     public static let preservePunctuation  = LetterCaseOptions(rawValue: 1 << 1)
   |                       |- warning: static property 'preservePunctuation' is not concurrency-safe because non-'Sendable' type 'LetterCaseOptions' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: annotate 'preservePunctuation' with '@MainActor' if property should only be accessed from the main actor
   |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
15 |     public static let stripPunctuation     = LetterCaseOptions(rawValue: 1 << 2)
16 |
/Users/admin/builder/spi-builder-workspace/LetterCase/Classes/LetterCaseOptions.swift:15:23: warning: static property 'stripPunctuation' is not concurrency-safe because non-'Sendable' type 'LetterCaseOptions' may have shared mutable state; this is an error in the Swift 6 language mode
 8 | import Foundation
 9 |
10 | public struct LetterCaseOptions: OptionSet {
   |               `- note: consider making struct 'LetterCaseOptions' conform to the 'Sendable' protocol
11 |     public let rawValue: Int
12 |
13 |     public static let preserveSuffix       = LetterCaseOptions(rawValue: 1 << 0)
14 |     public static let preservePunctuation  = LetterCaseOptions(rawValue: 1 << 1)
15 |     public static let stripPunctuation     = LetterCaseOptions(rawValue: 1 << 2)
   |                       |- warning: static property 'stripPunctuation' is not concurrency-safe because non-'Sendable' type 'LetterCaseOptions' may have shared mutable state; this is an error in the Swift 6 language mode
   |                       |- note: annotate 'stripPunctuation' with '@MainActor' if property should only be accessed from the main actor
   |                       `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
16 |
17 |     public init(rawValue: Int) {
Build complete! (17.09s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "LetterCase",
  "name" : "LetterCase",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
  ],
  "products" : [
    {
      "name" : "LetterCase",
      "targets" : [
        "LetterCase"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "LetterCase",
      "module_type" : "SwiftTarget",
      "name" : "LetterCase",
      "path" : "LetterCase/Classes",
      "product_memberships" : [
        "LetterCase"
      ],
      "sources" : [
        "KeyDecodingStrategyAdditions.swift",
        "LetterCase.swift",
        "LetterCaseOptions.swift",
        "StringAdditions.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "4.2"
}
Done.
This is a staging environment. For live and up-to-date package information, visit swiftpackageindex.com.