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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 FileProxy 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.
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Checkout
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Clone URL: https://github.com/michaelnisi/fileproxy.git
Reference: master
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/michaelnisi/fileproxy
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at b3f42aa Note install
Cloned https://github.com/michaelnisi/fileproxy.git
Revision (git rev-parse @):
b3f42aa67cfe38d888ab373b0f0a83f516675084
SUCCESS checkout https://github.com/michaelnisi/fileproxy.git at master
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.0
Building package at path:  $workDir
https://github.com/michaelnisi/fileproxy.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 FileProxy FileProxying.swift
[4/7] Emitting module FileProxy
/Users/admin/builder/spi-builder-workspace/Sources/FileProxy/FileProxy.swift:11:13: warning: let 'log' is not concurrency-safe because non-'Sendable' type 'OSLog' may have shared mutable state; this is an error in the Swift 6 language mode
  9 | import os.log
 10 |
 11 | private let log = OSLog(subsystem: "ink.codes.fileproxy", category: "fs")
    |             `- warning: let 'log' is not concurrency-safe because non-'Sendable' type 'OSLog' may have shared mutable state; this is an error in the Swift 6 language mode
 12 |
 13 | public final class FileProxy: NSObject {
os.OSLog:1:12: note: class 'OSLog' does not conform to the 'Sendable' protocol
1 | open class OSLog : NSObject {
  |            `- note: class 'OSLog' does not conform to the 'Sendable' protocol
2 |     @available(*, unavailable, message: "Unavailable in Swift")
3 |     public init!()
/Users/admin/builder/spi-builder-workspace/Sources/FileProxy/FileProxy.swift:9:1: warning: add '@preconcurrency' to suppress 'Sendable'-related warnings from module 'os'
  7 |
  8 | import Foundation
  9 | import os.log
    | `- warning: add '@preconcurrency' to suppress 'Sendable'-related warnings from module 'os'
 10 |
 11 | private let log = OSLog(subsystem: "ink.codes.fileproxy", category: "fs")
    |             |- note: annotate 'log' 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
 12 |
 13 | public final class FileProxy: NSObject {
/Users/admin/builder/spi-builder-workspace/Sources/FileProxy/FileProxy.swift:28:19: warning: stored property 'delegate' of 'Sendable'-conforming class 'FileProxy' is mutable; this is an error in the Swift 6 language mode
 26 |   /// session delegate queues. Depending on the number of sessions, this can
 27 |   /// get hairy.
 28 |   public weak var delegate: FileProxyDelegate?
    |                   `- warning: stored property 'delegate' of 'Sendable'-conforming class 'FileProxy' is mutable; this is an error in the Swift 6 language mode
 29 |
 30 |   /// Synchronizes access to sessions, handlers, and our invalidation flag.
/Users/admin/builder/spi-builder-workspace/Sources/FileProxy/FileProxyDelegate.swift:11:13: warning: let 'log' is not concurrency-safe because non-'Sendable' type 'OSLog' may have shared mutable state; this is an error in the Swift 6 language mode
  9 | import os.log
 10 |
 11 | private let log = OSLog.disabled
    |             `- warning: let 'log' is not concurrency-safe because non-'Sendable' type 'OSLog' may have shared mutable state; this is an error in the Swift 6 language mode
 12 |
 13 | public protocol FileProxyDelegate: class {
os.OSLog:1:12: note: class 'OSLog' does not conform to the 'Sendable' protocol
1 | open class OSLog : NSObject {
  |            `- note: class 'OSLog' does not conform to the 'Sendable' protocol
2 |     @available(*, unavailable, message: "Unavailable in Swift")
3 |     public init!()
/Users/admin/builder/spi-builder-workspace/Sources/FileProxy/FileProxyDelegate.swift:9:1: warning: add '@preconcurrency' to suppress 'Sendable'-related warnings from module 'os'
  7 |
  8 | import Foundation
  9 | import os.log
    | `- warning: add '@preconcurrency' to suppress 'Sendable'-related warnings from module 'os'
 10 |
 11 | private let log = OSLog.disabled
    |             |- note: annotate 'log' 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
 12 |
 13 | public protocol FileProxyDelegate: class {
/Users/admin/builder/spi-builder-workspace/Sources/FileProxy/FileProxyDelegate.swift:13:36: warning: using 'class' keyword to define a class-constrained protocol is deprecated; use 'AnyObject' instead
 11 | private let log = OSLog.disabled
 12 |
 13 | public protocol FileProxyDelegate: class {
    |                                    `- warning: using 'class' keyword to define a class-constrained protocol is deprecated; use 'AnyObject' instead
 14 |
 15 |   func proxy(
[5/7] Compiling FileProxy FileProxy.swift
/Users/admin/builder/spi-builder-workspace/Sources/FileProxy/FileProxy.swift:11:13: warning: let 'log' is not concurrency-safe because non-'Sendable' type 'OSLog' may have shared mutable state; this is an error in the Swift 6 language mode
  9 | import os.log
 10 |
 11 | private let log = OSLog(subsystem: "ink.codes.fileproxy", category: "fs")
    |             `- warning: let 'log' is not concurrency-safe because non-'Sendable' type 'OSLog' may have shared mutable state; this is an error in the Swift 6 language mode
 12 |
 13 | public final class FileProxy: NSObject {
os.OSLog:1:12: note: class 'OSLog' does not conform to the 'Sendable' protocol
1 | open class OSLog : NSObject {
  |            `- note: class 'OSLog' does not conform to the 'Sendable' protocol
2 |     @available(*, unavailable, message: "Unavailable in Swift")
3 |     public init!()
/Users/admin/builder/spi-builder-workspace/Sources/FileProxy/FileProxy.swift:9:1: warning: add '@preconcurrency' to suppress 'Sendable'-related warnings from module 'os'
  7 |
  8 | import Foundation
  9 | import os.log
    | `- warning: add '@preconcurrency' to suppress 'Sendable'-related warnings from module 'os'
 10 |
 11 | private let log = OSLog(subsystem: "ink.codes.fileproxy", category: "fs")
    |             |- note: annotate 'log' 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
 12 |
 13 | public final class FileProxy: NSObject {
/Users/admin/builder/spi-builder-workspace/Sources/FileProxy/FileProxy.swift:28:19: warning: stored property 'delegate' of 'Sendable'-conforming class 'FileProxy' is mutable; this is an error in the Swift 6 language mode
 26 |   /// session delegate queues. Depending on the number of sessions, this can
 27 |   /// get hairy.
 28 |   public weak var delegate: FileProxyDelegate?
    |                   `- warning: stored property 'delegate' of 'Sendable'-conforming class 'FileProxy' is mutable; this is an error in the Swift 6 language mode
 29 |
 30 |   /// Synchronizes access to sessions, handlers, and our invalidation flag.
/Users/admin/builder/spi-builder-workspace/Sources/FileProxy/FileProxy.swift:235:9: warning: capture of 'find' with non-sendable type '([URLSession], [URLSessionDownloadTask]) -> ()' in a `@Sendable` closure; this is an error in the Swift 6 language mode
233 |
234 |       session.getTasksWithCompletionHandler { _, _, tasks in
235 |         find(Array(sessions.dropFirst()), acc + tasks.filter {
    |         |- warning: capture of 'find' with non-sendable type '([URLSession], [URLSessionDownloadTask]) -> ()' 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'
236 |           $0.originalRequest?.url == url
237 |         })
/Users/admin/builder/spi-builder-workspace/Sources/FileProxy/FileProxy.swift:228:10: warning: concurrently-executed local function 'find' must be marked as '@Sendable'; this is an error in the Swift 6 language mode
226 |     completion: @escaping ([URLSessionDownloadTask]) -> Void)
227 |   {
228 |     func find(_ sessions: [URLSession], _ acc: [URLSessionDownloadTask] = []) {
    |          `- warning: concurrently-executed local function 'find' must be marked as '@Sendable'; this is an error in the Swift 6 language mode
229 |       guard let session = sessions.first else {
230 |         completion(acc)
/Users/admin/builder/spi-builder-workspace/Sources/FileProxy/FileProxy.swift:295:13: warning: capture of 'find' with non-sendable type '([FileProxy.Session], Acc) -> ()' in a `@Sendable` closure; this is an error in the Swift 6 language mode
293 |           // The URL should be skipped if we find a matching task in-flight.
294 |           guard !tasks.contains(where: { $0.originalRequest?.url == url }) else {
295 |             find(
    |             |- warning: capture of 'find' with non-sendable type '([FileProxy.Session], Acc) -> ()' 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'
296 |               Array(sessions.dropFirst()),
297 |               Acc(good: acc.good, unused: acc.unused, skip: true)
/Users/admin/builder/spi-builder-workspace/Sources/FileProxy/FileProxy.swift:296:21: warning: capture of 'sessions' with non-sendable type '[FileProxy.Session]' in a `@Sendable` closure; this is an error in the Swift 6 language mode
 63 |   /// Notice the difference to `URLSessionConfiguration.background`, all our
 64 |   /// url sessions are background url sessions.
 65 |   private enum Session {
    |                `- note: consider making enum 'Session' conform to the 'Sendable' protocol
 66 |     case background(SessionIdentifier, URLSession, () -> Void)
 67 |     case transient(SessionIdentifier, URLSession)
    :
294 |           guard !tasks.contains(where: { $0.originalRequest?.url == url }) else {
295 |             find(
296 |               Array(sessions.dropFirst()),
    |                     `- warning: capture of 'sessions' with non-sendable type '[FileProxy.Session]' in a `@Sendable` closure; this is an error in the Swift 6 language mode
297 |               Acc(good: acc.good, unused: acc.unused, skip: true)
298 |             )
/Users/admin/builder/spi-builder-workspace/Sources/FileProxy/FileProxy.swift:277:10: warning: concurrently-executed local function 'find' must be marked as '@Sendable'; this is an error in the Swift 6 language mode
275 |     }
276 |
277 |     func find(
    |          `- warning: concurrently-executed local function 'find' must be marked as '@Sendable'; this is an error in the Swift 6 language mode
278 |       _ sessions: [Session],
279 |       _ acc: Acc = Acc(good: nil, unused: [], skip: false)
[6/7] Compiling FileProxy FileProxyDelegate.swift
/Users/admin/builder/spi-builder-workspace/Sources/FileProxy/FileProxyDelegate.swift:11:13: warning: let 'log' is not concurrency-safe because non-'Sendable' type 'OSLog' may have shared mutable state; this is an error in the Swift 6 language mode
  9 | import os.log
 10 |
 11 | private let log = OSLog.disabled
    |             `- warning: let 'log' is not concurrency-safe because non-'Sendable' type 'OSLog' may have shared mutable state; this is an error in the Swift 6 language mode
 12 |
 13 | public protocol FileProxyDelegate: class {
os.OSLog:1:12: note: class 'OSLog' does not conform to the 'Sendable' protocol
1 | open class OSLog : NSObject {
  |            `- note: class 'OSLog' does not conform to the 'Sendable' protocol
2 |     @available(*, unavailable, message: "Unavailable in Swift")
3 |     public init!()
/Users/admin/builder/spi-builder-workspace/Sources/FileProxy/FileProxyDelegate.swift:9:1: warning: add '@preconcurrency' to suppress 'Sendable'-related warnings from module 'os'
  7 |
  8 | import Foundation
  9 | import os.log
    | `- warning: add '@preconcurrency' to suppress 'Sendable'-related warnings from module 'os'
 10 |
 11 | private let log = OSLog.disabled
    |             |- note: annotate 'log' 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
 12 |
 13 | public protocol FileProxyDelegate: class {
/Users/admin/builder/spi-builder-workspace/Sources/FileProxy/FileProxyDelegate.swift:13:36: warning: using 'class' keyword to define a class-constrained protocol is deprecated; use 'AnyObject' instead
 11 | private let log = OSLog.disabled
 12 |
 13 | public protocol FileProxyDelegate: class {
    |                                    `- warning: using 'class' keyword to define a class-constrained protocol is deprecated; use 'AnyObject' instead
 14 |
 15 |   func proxy(
[7/7] Compiling FileProxy FileLocator.swift
Build complete! (18.31s)
warning: 'spi-builder-workspace': the target name FileProxyTests has different case on the filesystem and the Package.swift manifest file
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "FileProxy",
  "name" : "FileProxy",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "ios",
      "version" : "11.0"
    },
    {
      "name" : "macos",
      "version" : "10.13"
    }
  ],
  "products" : [
    {
      "name" : "FileProxy",
      "targets" : [
        "FileProxy"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "FileProxyTests",
      "module_type" : "SwiftTarget",
      "name" : "FileProxyTests",
      "path" : "Tests/FileProxyTests",
      "sources" : [
        "fileproxyTests.swift"
      ],
      "target_dependencies" : [
        "FileProxy"
      ],
      "type" : "test"
    },
    {
      "c99name" : "FileProxy",
      "module_type" : "SwiftTarget",
      "name" : "FileProxy",
      "path" : "Sources/FileProxy",
      "product_memberships" : [
        "FileProxy"
      ],
      "sources" : [
        "FileLocator.swift",
        "FileProxy.swift",
        "FileProxyDelegate.swift",
        "FileProxying.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.0"
}
warning: 'spi-builder-workspace': the target name FileProxyTests has different case on the filesystem and the Package.swift manifest file
Done.
This is a staging environment. For live and up-to-date package information, visit swiftpackageindex.com.