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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 RestEssentials, reference master (fb20a3), with Swift 6.0 for macOS (SPM) on 16 Sep 2024 04:24:41 UTC.

Swift 6 data race errors: 3

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.0.0-Release.Candidate.app xcrun 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: 4.53.0
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/sean7512/RestEssentials.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/sean7512/RestEssentials
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at fb20a36 remove deprecated calls for network activity ui
Cloned https://github.com/sean7512/RestEssentials.git
Revision (git rev-parse @):
fb20a36735ac7fb3c8020c6f66b49095d4c708d2
SUCCESS checkout https://github.com/sean7512/RestEssentials.git at master
========================================
Build
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Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $PWD
https://github.com/sean7512/RestEssentials.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.0.0-Release.Candidate.app xcrun 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-117DEE11B69C53C9.txt
[3/6] Compiling RestEssentials Deserializer.swift
[4/6] Emitting module RestEssentials
/Users/admin/builder/spi-builder-workspace/Sources/RestEssentials/JSON.swift:22:24: warning: static property 'kJSONNull' is not concurrency-safe because non-'Sendable' type 'JSON' may have shared mutable state; this is an error in the Swift 6 language mode
 18 |
 19 | /// Represents any valid JSON type: another JSON object, an array, a string, a number, or a boolean.
 20 | public struct JSON : CustomStringConvertible, ExpressibleByArrayLiteral, ExpressibleByDictionaryLiteral {
    |               `- note: consider making struct 'JSON' conform to the 'Sendable' protocol
 21 |
 22 |     private static let kJSONNull = JSON(rawValue: Void())
    |                        |- warning: static property 'kJSONNull' is not concurrency-safe because non-'Sendable' type 'JSON' may have shared mutable state; this is an error in the Swift 6 language mode
    |                        |- note: annotate 'kJSONNull' 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
 23 |
 24 |     private let raw: JSONValue
/Users/admin/builder/spi-builder-workspace/Sources/RestEssentials/RestController.swift:52:14: warning: non-final class 'RestController' cannot conform to 'Sendable'; use '@unchecked Sendable'; this is an error in the Swift 6 language mode
 50 | ///
 51 | /// **NOTE:** Ensure to configure `App Transport Security` appropriately.
 52 | public class RestController : NSObject, URLSessionDelegate {
    |              `- warning: non-final class 'RestController' cannot conform to 'Sendable'; use '@unchecked Sendable'; this is an error in the Swift 6 language mode
 53 |
 54 |     fileprivate static let kDefaultRequestTimeout = 60 as TimeInterval
/Users/admin/builder/spi-builder-workspace/Sources/RestEssentials/RestController.swift:65:17: warning: stored property 'session' of 'Sendable'-conforming class 'RestController' is mutable; this is an error in the Swift 6 language mode
 63 |
 64 |     private let url: URL
 65 |     private var session: URLSession
    |                 `- warning: stored property 'session' of 'Sendable'-conforming class 'RestController' is mutable; this is an error in the Swift 6 language mode
 66 |
 67 |     /// This generator will be called before every useage of this RestController
[5/6] Compiling RestEssentials RestController.swift
/Users/admin/builder/spi-builder-workspace/Sources/RestEssentials/RestController.swift:52:14: warning: non-final class 'RestController' cannot conform to 'Sendable'; use '@unchecked Sendable'; this is an error in the Swift 6 language mode
 50 | ///
 51 | /// **NOTE:** Ensure to configure `App Transport Security` appropriately.
 52 | public class RestController : NSObject, URLSessionDelegate {
    |              `- warning: non-final class 'RestController' cannot conform to 'Sendable'; use '@unchecked Sendable'; this is an error in the Swift 6 language mode
 53 |
 54 |     fileprivate static let kDefaultRequestTimeout = 60 as TimeInterval
/Users/admin/builder/spi-builder-workspace/Sources/RestEssentials/RestController.swift:65:17: warning: stored property 'session' of 'Sendable'-conforming class 'RestController' is mutable; this is an error in the Swift 6 language mode
 63 |
 64 |     private let url: URL
 65 |     private var session: URLSession
    |                 `- warning: stored property 'session' of 'Sendable'-conforming class 'RestController' is mutable; this is an error in the Swift 6 language mode
 66 |
 67 |     /// This generator will be called before every useage of this RestController
[6/6] Compiling RestEssentials JSON.swift
/Users/admin/builder/spi-builder-workspace/Sources/RestEssentials/JSON.swift:22:24: warning: static property 'kJSONNull' is not concurrency-safe because non-'Sendable' type 'JSON' may have shared mutable state; this is an error in the Swift 6 language mode
 18 |
 19 | /// Represents any valid JSON type: another JSON object, an array, a string, a number, or a boolean.
 20 | public struct JSON : CustomStringConvertible, ExpressibleByArrayLiteral, ExpressibleByDictionaryLiteral {
    |               `- note: consider making struct 'JSON' conform to the 'Sendable' protocol
 21 |
 22 |     private static let kJSONNull = JSON(rawValue: Void())
    |                        |- warning: static property 'kJSONNull' is not concurrency-safe because non-'Sendable' type 'JSON' may have shared mutable state; this is an error in the Swift 6 language mode
    |                        |- note: annotate 'kJSONNull' 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
 23 |
 24 |     private let raw: JSONValue
Build complete! (9.16s)
warning: 'spi-builder-workspace': found 1 file(s) which are unhandled; explicitly declare them as resources or exclude from the target
    /Users/admin/builder/spi-builder-workspace/Sources/RestEssentials/Info.plist
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "RestEssentials",
  "name" : "RestEssentials",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "15.0"
    },
    {
      "name" : "watchos",
      "version" : "8.0"
    },
    {
      "name" : "tvos",
      "version" : "15.0"
    },
    {
      "name" : "macos",
      "version" : "12.0"
    }
  ],
  "products" : [
    {
      "name" : "RestEssentials",
      "targets" : [
        "RestEssentials"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "RestEssentialsTests",
      "module_type" : "SwiftTarget",
      "name" : "RestEssentialsTests",
      "path" : "Sources/RestEssentialsTests",
      "sources" : [
        "RestControllerTests.swift"
      ],
      "target_dependencies" : [
        "RestEssentials"
      ],
      "type" : "test"
    },
    {
      "c99name" : "RestEssentials",
      "module_type" : "SwiftTarget",
      "name" : "RestEssentials",
      "path" : "Sources/RestEssentials",
      "product_memberships" : [
        "RestEssentials"
      ],
      "sources" : [
        "Deserializer.swift",
        "JSON.swift",
        "RestController.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.5"
}
Done.