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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 Wells, reference 0.3.0 (1558d1), with Swift 6.0 for macOS (SPM) on 3 Nov 2024 12:44:44 UTC.

Swift 6 data race errors: 4

Build Command

env DEVELOPER_DIR=/Applications/Xcode-16.1.0.app xcrun swift build --arch arm64 -Xswiftc -Xfrontend -Xswiftc -stats-output-dir -Xswiftc -Xfrontend -Xswiftc .stats -Xswiftc -strict-concurrency=complete

Build Log

========================================
RunAll
========================================
Builder version: 4.56.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/ChimeHQ/Wells.git
Reference: 0.3.0
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/ChimeHQ/Wells
 * tag               0.3.0      -> FETCH_HEAD
HEAD is now at 1558d1b Retry support
Cloned https://github.com/ChimeHQ/Wells.git
Revision (git rev-parse @):
1558d1bbafc1c57060103c5194ffa3abf4a332e3
SUCCESS checkout https://github.com/ChimeHQ/Wells.git at 0.3.0
========================================
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": "wells",
      "name": "Wells",
      "url": "https://github.com/ChimeHQ/Wells.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Wells",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/ChimeHQ/Wells.git
[3/208] Fetching wells
Fetched https://github.com/ChimeHQ/Wells.git from cache (0.81s)
Creating working copy for https://github.com/ChimeHQ/Wells.git
Working copy of https://github.com/ChimeHQ/Wells.git resolved at 0.3.0 (1558d1b)
warning: '.resolve-product-dependencies': dependency 'wells' is not used by any target
Found 0 product dependencies
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $PWD
https://github.com/ChimeHQ/Wells.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-16.1.0.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--7754E27361AE5C74.txt
[3/10] Compiling Wells WellsUploader.swift
/Users/admin/builder/spi-builder-workspace/Sources/Wells/WellsUploader.swift:19:23: warning: static property 'defaultBackgroundIdentifier' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 17 |     public weak var delegate: WellsUploaderDelegate?
 18 |
 19 |     public static var defaultBackgroundIdentifier: String = {
    |                       |- warning: static property 'defaultBackgroundIdentifier' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |                       |- note: convert 'defaultBackgroundIdentifier' to a 'let' constant to make 'Sendable' shared state immutable
    |                       |- note: annotate 'defaultBackgroundIdentifier' 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
 20 |         let bundleId = Bundle.main.bundleIdentifier ?? "com.chimehq.Wells"
 21 |
/Users/admin/builder/spi-builder-workspace/Sources/Wells/WellsUploader.swift:9:14: warning: non-final class 'WellsUploader' cannot conform to 'Sendable'; use '@unchecked Sendable'; this is an error in the Swift 6 language mode
  7 | }
  8 |
  9 | public class WellsUploader: NSObject {
    |              `- warning: non-final class 'WellsUploader' cannot conform to 'Sendable'; use '@unchecked Sendable'; this is an error in the Swift 6 language mode
 10 |     private static let defaultRetryInterval: TimeInterval = 1 * 60.0
 11 |
/Users/admin/builder/spi-builder-workspace/Sources/Wells/WellsUploader.swift:17:21: warning: stored property 'delegate' of 'Sendable'-conforming class 'WellsUploader' is mutable; this is an error in the Swift 6 language mode
 15 |     public let backgroundIdentifier: String?
 16 |
 17 |     public weak var delegate: WellsUploaderDelegate?
    |                     `- warning: stored property 'delegate' of 'Sendable'-conforming class 'WellsUploader' is mutable; this is an error in the Swift 6 language mode
 18 |
 19 |     public static var defaultBackgroundIdentifier: String = {
/Users/admin/builder/spi-builder-workspace/Sources/Wells/WellsUploader.swift:94:17: warning: capture of 'completionHandler' with non-sendable type '([URLSessionUploadTask]) -> Void' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 92 |         OperationQueue.main.addOperation {
 93 |             self.session.getTasksWithCompletionHandler { (_, uploadTasks, _) in
 94 |                 completionHandler(uploadTasks)
    |                 |- warning: capture of 'completionHandler' with non-sendable type '([URLSessionUploadTask]) -> Void' in a `@Sendable` closure; this is an error in the Swift 6 language mode
    |                 `- note: a function type must be marked '@Sendable' to conform to 'Sendable'
 95 |             }
 96 |         }
/Users/admin/builder/spi-builder-workspace/Sources/Wells/WellsUploader.swift:94:17: warning: capture of 'completionHandler' with non-sendable type '([URLSessionUploadTask]) -> Void' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 92 |         OperationQueue.main.addOperation {
 93 |             self.session.getTasksWithCompletionHandler { (_, uploadTasks, _) in
 94 |                 completionHandler(uploadTasks)
    |                 |- warning: capture of 'completionHandler' with non-sendable type '([URLSessionUploadTask]) -> Void' in a `@Sendable` closure; this is an error in the Swift 6 language mode
    |                 `- note: a function type must be marked '@Sendable' to conform to 'Sendable'
 95 |             }
 96 |         }
/Users/admin/builder/spi-builder-workspace/Sources/Wells/WellsUploader.swift:148:20: warning: capture of 'response' with non-sendable type 'NetworkResponse' in a `@Sendable` closure; this is an error in the Swift 6 language mode
146 |
147 |         OperationQueue.main.addOperation {
148 |             switch response {
    |                    `- warning: capture of 'response' with non-sendable type 'NetworkResponse' in a `@Sendable` closure; this is an error in the Swift 6 language mode
149 |             case .success:
150 |                 self.delegate?.finishedUpload(of: identifier, with: nil, by: self)
/Users/admin/builder/spi-builder-workspace/Sources/Wells/NetworkResponse.swift:3:13: note: consider making enum 'NetworkResponse' conform to the 'Sendable' protocol
 1 | import Foundation
 2 |
 3 | public enum NetworkResponse {
   |             `- note: consider making enum 'NetworkResponse' conform to the 'Sendable' protocol
 4 |     case failed(NetworkResponseError)
 5 |     case rejected
[4/10] Compiling Wells ReportLocationProvider.swift
[5/10] Compiling Wells Protocol+Helpers.swift
[6/10] Compiling Wells WellsReporter.swift
/Users/admin/builder/spi-builder-workspace/Sources/Wells/WellsReporter.swift:9:23: warning: static property 'shared' is not concurrency-safe because non-'Sendable' type 'WellsReporter' may have shared mutable state; this is an error in the Swift 6 language mode
  6 | }
  7 |
  8 | public class WellsReporter {
    |              `- note: class 'WellsReporter' does not conform to the 'Sendable' protocol
  9 |     public static let shared = WellsReporter()
    |                       |- warning: static property 'shared' is not concurrency-safe because non-'Sendable' type 'WellsReporter' may have shared mutable state; this is an error in the Swift 6 language mode
    |                       |- note: annotate 'shared' 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
 10 |     public static let uploadFileExtension = "wellsdata"
 11 |     private static let maximumAccountCount = 5
/Users/admin/builder/spi-builder-workspace/Sources/Wells/WellsUploader.swift:19:23: warning: static property 'defaultBackgroundIdentifier' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 17 |     public weak var delegate: WellsUploaderDelegate?
 18 |
 19 |     public static var defaultBackgroundIdentifier: String = {
    |                       |- warning: static property 'defaultBackgroundIdentifier' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |                       |- note: convert 'defaultBackgroundIdentifier' to a 'let' constant to make 'Sendable' shared state immutable
    |                       |- note: annotate 'defaultBackgroundIdentifier' 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
 20 |         let bundleId = Bundle.main.bundleIdentifier ?? "com.chimehq.Wells"
 21 |
/Users/admin/builder/spi-builder-workspace/Sources/Wells/WellsReporter.swift:32:13: warning: capture of 'self' with non-sendable type 'WellsReporter' in a `@Sendable` closure; this is an error in the Swift 6 language mode
  6 | }
  7 |
  8 | public class WellsReporter {
    |              `- note: class 'WellsReporter' does not conform to the 'Sendable' protocol
  9 |     public static let shared = WellsReporter()
 10 |     public static let uploadFileExtension = "wellsdata"
    :
 30 |
 31 |         DispatchQueue.main.asyncAfter(deadline: .now() + .seconds(10), qos: .background) {
 32 |             self.handleExistingLogs()
    |             `- warning: capture of 'self' with non-sendable type 'WellsReporter' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 33 |         }
 34 |     }
/Users/admin/builder/spi-builder-workspace/Sources/Wells/WellsReporter.swift:139:13: warning: capture of 'self' with non-sendable type 'WellsReporter' in a `@Sendable` closure; this is an error in the Swift 6 language mode
  6 | }
  7 |
  8 | public class WellsReporter {
    |              `- note: class 'WellsReporter' does not conform to the 'Sendable' protocol
  9 |     public static let shared = WellsReporter()
 10 |     public static let uploadFileExtension = "wellsdata"
    :
137 |
138 |         DispatchQueue.main.asyncAfter(deadline: .now() + .seconds(delay), qos: .background) {
139 |             self.submit(fileURL: fileURL, identifier: identifier, uploadRequest: newRequest)
    |             `- warning: capture of 'self' with non-sendable type 'WellsReporter' in a `@Sendable` closure; this is an error in the Swift 6 language mode
140 |         }
141 |     }
/Users/admin/builder/spi-builder-workspace/Sources/Wells/WellsReporter.swift:139:82: warning: reference to captured var 'newRequest' in concurrently-executing code; this is an error in the Swift 6 language mode
137 |
138 |         DispatchQueue.main.asyncAfter(deadline: .now() + .seconds(delay), qos: .background) {
139 |             self.submit(fileURL: fileURL, identifier: identifier, uploadRequest: newRequest)
    |                                                                                  `- warning: reference to captured var 'newRequest' in concurrently-executing code; this is an error in the Swift 6 language mode
140 |         }
141 |     }
/Users/admin/builder/spi-builder-workspace/Sources/Wells/WellsReporter.swift:32:13: warning: sending 'self' risks causing data races; this is an error in the Swift 6 language mode
 30 |
 31 |         DispatchQueue.main.asyncAfter(deadline: .now() + .seconds(10), qos: .background) {
 32 |             self.handleExistingLogs()
    |             |- warning: sending 'self' risks causing data races; this is an error in the Swift 6 language mode
    |             `- note: task-isolated 'self' is captured by a main actor-isolated closure. main actor-isolated uses in closure may race against later nonisolated uses
 33 |         }
 34 |     }
/Users/admin/builder/spi-builder-workspace/Sources/Wells/WellsReporter.swift:139:13: warning: sending 'self' risks causing data races; this is an error in the Swift 6 language mode
137 |
138 |         DispatchQueue.main.asyncAfter(deadline: .now() + .seconds(delay), qos: .background) {
139 |             self.submit(fileURL: fileURL, identifier: identifier, uploadRequest: newRequest)
    |             |- warning: sending 'self' risks causing data races; this is an error in the Swift 6 language mode
    |             `- note: task-isolated 'self' is captured by a main actor-isolated closure. main actor-isolated uses in closure may race against later nonisolated uses
140 |         }
141 |     }
[7/10] Compiling Wells FileManager+Helpers.swift
[8/10] Compiling Wells Data+compression.swift
[9/10] Emitting module Wells
/Users/admin/builder/spi-builder-workspace/Sources/Wells/WellsReporter.swift:9:23: warning: static property 'shared' is not concurrency-safe because non-'Sendable' type 'WellsReporter' may have shared mutable state; this is an error in the Swift 6 language mode
  6 | }
  7 |
  8 | public class WellsReporter {
    |              `- note: class 'WellsReporter' does not conform to the 'Sendable' protocol
  9 |     public static let shared = WellsReporter()
    |                       |- warning: static property 'shared' is not concurrency-safe because non-'Sendable' type 'WellsReporter' may have shared mutable state; this is an error in the Swift 6 language mode
    |                       |- note: annotate 'shared' 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
 10 |     public static let uploadFileExtension = "wellsdata"
 11 |     private static let maximumAccountCount = 5
/Users/admin/builder/spi-builder-workspace/Sources/Wells/WellsUploader.swift:19:23: warning: static property 'defaultBackgroundIdentifier' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
 17 |     public weak var delegate: WellsUploaderDelegate?
 18 |
 19 |     public static var defaultBackgroundIdentifier: String = {
    |                       |- warning: static property 'defaultBackgroundIdentifier' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
    |                       |- note: convert 'defaultBackgroundIdentifier' to a 'let' constant to make 'Sendable' shared state immutable
    |                       |- note: annotate 'defaultBackgroundIdentifier' 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
 20 |         let bundleId = Bundle.main.bundleIdentifier ?? "com.chimehq.Wells"
 21 |
/Users/admin/builder/spi-builder-workspace/Sources/Wells/WellsUploader.swift:9:14: warning: non-final class 'WellsUploader' cannot conform to 'Sendable'; use '@unchecked Sendable'; this is an error in the Swift 6 language mode
  7 | }
  8 |
  9 | public class WellsUploader: NSObject {
    |              `- warning: non-final class 'WellsUploader' cannot conform to 'Sendable'; use '@unchecked Sendable'; this is an error in the Swift 6 language mode
 10 |     private static let defaultRetryInterval: TimeInterval = 1 * 60.0
 11 |
/Users/admin/builder/spi-builder-workspace/Sources/Wells/WellsUploader.swift:17:21: warning: stored property 'delegate' of 'Sendable'-conforming class 'WellsUploader' is mutable; this is an error in the Swift 6 language mode
 15 |     public let backgroundIdentifier: String?
 16 |
 17 |     public weak var delegate: WellsUploaderDelegate?
    |                     `- warning: stored property 'delegate' of 'Sendable'-conforming class 'WellsUploader' is mutable; this is an error in the Swift 6 language mode
 18 |
 19 |     public static var defaultBackgroundIdentifier: String = {
[10/10] Compiling Wells NetworkResponse.swift
Build complete! (8.75s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "Wells",
  "name" : "Wells",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "10.12"
    },
    {
      "name" : "ios",
      "version" : "10.0"
    },
    {
      "name" : "tvos",
      "version" : "10.0"
    },
    {
      "name" : "watchos",
      "version" : "3.0"
    }
  ],
  "products" : [
    {
      "name" : "Wells",
      "targets" : [
        "Wells"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "WellsTests",
      "module_type" : "SwiftTarget",
      "name" : "WellsTests",
      "path" : "Tests/WellsTests",
      "sources" : [
        "HTTPHeaderTests.swift",
        "NetworkResponseTests.swift"
      ],
      "target_dependencies" : [
        "Wells"
      ],
      "type" : "test"
    },
    {
      "c99name" : "Wells",
      "module_type" : "SwiftTarget",
      "name" : "Wells",
      "path" : "Sources/Wells",
      "product_memberships" : [
        "Wells"
      ],
      "sources" : [
        "Data+compression.swift",
        "FileManager+Helpers.swift",
        "NetworkResponse.swift",
        "Protocol+Helpers.swift",
        "ReportLocationProvider.swift",
        "WellsReporter.swift",
        "WellsUploader.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
Done.