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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 ECMASwift, reference main (746f56), with Swift 6.1 for macOS (SPM) on 29 Apr 2025 05:36:16 UTC.

Swift 6 data race errors: 0

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: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/theolampert/ECMASwift.git
Reference: main
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/theolampert/ECMASwift
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 746f56f Test more methods
Cloned https://github.com/theolampert/ECMASwift.git
Revision (git rev-parse @):
746f56f1ea60600f13daaf6b27e8871ab4618857
SUCCESS checkout https://github.com/theolampert/ECMASwift.git at main
========================================
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": "ecmaswift",
      "name": "ECMASwift",
      "url": "https://github.com/theolampert/ECMASwift.git",
      "version": "unspecified",
      "path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/ECMASwift",
      "dependencies": [
      ]
    }
  ]
}
Fetching https://github.com/theolampert/ECMASwift.git
[1/670] Fetching ecmaswift
Fetched https://github.com/theolampert/ECMASwift.git from cache (0.70s)
Creating working copy for https://github.com/theolampert/ECMASwift.git
Working copy of https://github.com/theolampert/ECMASwift.git resolved at main (746f56f)
warning: '.resolve-product-dependencies': dependency 'ecmaswift' is not used by any target
Found 0 product dependencies
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             6.1
Building package at path:  $PWD
https://github.com/theolampert/ECMASwift.git
https://github.com/theolampert/ECMASwift.git
{
  "dependencies" : [
  ],
  "manifest_display_name" : "ECMASwift",
  "name" : "ECMASwift",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "11.0"
    },
    {
      "name" : "ios",
      "version" : "14.0"
    },
    {
      "name" : "tvos",
      "version" : "14.0"
    },
    {
      "name" : "watchos",
      "version" : "7.0"
    }
  ],
  "products" : [
    {
      "name" : "ECMASwift",
      "targets" : [
        "ECMASwift"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ECMASwiftTests",
      "module_type" : "SwiftTarget",
      "name" : "ECMASwiftTests",
      "path" : "Tests/ECMASwiftTests",
      "sources" : [
        "BlobTests.swift",
        "CryptoTests.swift",
        "FetchTests.swift",
        "HeadersTests.swift",
        "RequestTests.swift",
        "SubtleCryptoTests.swift",
        "TextEncoderTests.swift",
        "TimerTests.swift",
        "URLSearchParamsTests.swift",
        "URLTests.swift"
      ],
      "target_dependencies" : [
        "ECMASwift"
      ],
      "type" : "test"
    },
    {
      "c99name" : "ECMASwift",
      "module_type" : "SwiftTarget",
      "name" : "ECMASwift",
      "path" : "Sources/ECMASwift",
      "product_memberships" : [
        "ECMASwift"
      ],
      "sources" : [
        "API/Blob/Blob.swift",
        "API/Console/Console.swift",
        "API/Crypto/Crypto.swift",
        "API/Crypto/SublteCrypto.swift",
        "API/Fetch/AbortController.swift",
        "API/Fetch/Fetch.swift",
        "API/Fetch/HTTPClient.swift",
        "API/FormData/FormData.swift",
        "API/Headers/Headers.swift",
        "API/Request/Request.swift",
        "API/Request/RequestBody.swift",
        "API/TextEncoder/TextEncoder.swift",
        "API/Timers/Timers.swift",
        "API/URL/URL.swift",
        "API/URLSearchParams/URLSearchParams.swift",
        "Helpers/JSContext+callFunction.swift",
        "Helpers/JSValue+callFunction.swift",
        "Helpers/JSValue+isNil.swift",
        "Helpers/JSValue+toType.swift",
        "JSRuntime.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.10"
}
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
[3/21] Compiling ECMASwift Timers.swift
/Users/admin/builder/spi-builder-workspace/Sources/ECMASwift/API/Timers/Timers.swift:20:31: warning: capture of 'callback' with non-sendable type 'JSValue?' in a '@Sendable' closure
18 |         let uuid = UUID().uuidString
19 |         let timer = Timer(timeInterval: timeInterval, repeats: repeats) { [weak self, weak callback] _ in
20 |             if let callback = callback, callback.isObject {
   |                               `- warning: capture of 'callback' with non-sendable type 'JSValue?' in a '@Sendable' closure
21 |                 callback.call(withArguments: [])
22 |             }
/Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX15.4.sdk/System/Library/Frameworks/JavaScriptCore.framework/Headers/JSValue.h:48:12: note: class 'JSValue' does not conform to the 'Sendable' protocol
 46 | */
 47 | NS_CLASS_AVAILABLE(10_9, 7_0)
 48 | @interface JSValue : NSObject
    |            `- note: class 'JSValue' does not conform to the 'Sendable' protocol
 49 |
 50 | /*!
/Users/admin/builder/spi-builder-workspace/Sources/ECMASwift/API/Timers/Timers.swift:1:1: warning: add '@preconcurrency' to suppress 'Sendable'-related warnings from module 'JavaScriptCore'
 1 | import JavaScriptCore
   | `- warning: add '@preconcurrency' to suppress 'Sendable'-related warnings from module 'JavaScriptCore'
 2 | import os.lock
 3 |
/Users/admin/builder/spi-builder-workspace/Sources/ECMASwift/API/Timers/Timers.swift:25:38: warning: capture of 'self' with non-sendable type 'TimerAPI?' in a '@Sendable' closure
 9 | /// - [clearTimeout()](https://developer.mozilla.org/en-US/docs/Web/API/clearTimeout)
10 | /// - [clearInterval()](https://developer.mozilla.org/en-US/docs/Web/API/clearInterval)
11 | final class TimerAPI {
   |             `- note: class 'TimerAPI' does not conform to the 'Sendable' protocol
12 |     var timers = [String: Timer]()
13 |
   :
23 |
24 |             if !repeats {
25 |                 os_unfair_lock_lock(&self!.lock)
   |                                      `- warning: capture of 'self' with non-sendable type 'TimerAPI?' in a '@Sendable' closure
26 |                 self?.timers[uuid] = nil
27 |                 os_unfair_lock_unlock(&self!.lock)
[4/21] Compiling ECMASwift URL.swift
/Users/admin/builder/spi-builder-workspace/Sources/ECMASwift/API/Timers/Timers.swift:20:31: warning: capture of 'callback' with non-sendable type 'JSValue?' in a '@Sendable' closure
18 |         let uuid = UUID().uuidString
19 |         let timer = Timer(timeInterval: timeInterval, repeats: repeats) { [weak self, weak callback] _ in
20 |             if let callback = callback, callback.isObject {
   |                               `- warning: capture of 'callback' with non-sendable type 'JSValue?' in a '@Sendable' closure
21 |                 callback.call(withArguments: [])
22 |             }
/Applications/Xcode-16.3.0.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX15.4.sdk/System/Library/Frameworks/JavaScriptCore.framework/Headers/JSValue.h:48:12: note: class 'JSValue' does not conform to the 'Sendable' protocol
 46 | */
 47 | NS_CLASS_AVAILABLE(10_9, 7_0)
 48 | @interface JSValue : NSObject
    |            `- note: class 'JSValue' does not conform to the 'Sendable' protocol
 49 |
 50 | /*!
/Users/admin/builder/spi-builder-workspace/Sources/ECMASwift/API/Timers/Timers.swift:1:1: warning: add '@preconcurrency' to suppress 'Sendable'-related warnings from module 'JavaScriptCore'
 1 | import JavaScriptCore
   | `- warning: add '@preconcurrency' to suppress 'Sendable'-related warnings from module 'JavaScriptCore'
 2 | import os.lock
 3 |
/Users/admin/builder/spi-builder-workspace/Sources/ECMASwift/API/Timers/Timers.swift:25:38: warning: capture of 'self' with non-sendable type 'TimerAPI?' in a '@Sendable' closure
 9 | /// - [clearTimeout()](https://developer.mozilla.org/en-US/docs/Web/API/clearTimeout)
10 | /// - [clearInterval()](https://developer.mozilla.org/en-US/docs/Web/API/clearInterval)
11 | final class TimerAPI {
   |             `- note: class 'TimerAPI' does not conform to the 'Sendable' protocol
12 |     var timers = [String: Timer]()
13 |
   :
23 |
24 |             if !repeats {
25 |                 os_unfair_lock_lock(&self!.lock)
   |                                      `- warning: capture of 'self' with non-sendable type 'TimerAPI?' in a '@Sendable' closure
26 |                 self?.timers[uuid] = nil
27 |                 os_unfair_lock_unlock(&self!.lock)
[5/21] Compiling ECMASwift JSValue+callFunction.swift
/Users/admin/builder/spi-builder-workspace/Sources/ECMASwift/Helpers/JSValue+callFunction.swift:14:30: warning: sending '$0' risks causing data races; this is an error in the Swift 6 language mode
12 |         try await withCheckedThrowingContinuation { continuation in
13 |             let onFulfilled: @convention(block) (JSValue) -> Void = {
14 |                 continuation.resume(returning: $0)
   |                              |- warning: sending '$0' risks causing data races; this is an error in the Swift 6 language mode
   |                              `- note: task-isolated '$0' is passed as a 'sending' parameter; Uses in callee may race with later task-isolated uses
15 |             }
16 |             let onRejected: @convention(block) (JSValue) -> Void = { error in
/Users/admin/builder/spi-builder-workspace/Sources/ECMASwift/Helpers/JSValue+callFunction.swift:40:30: warning: sending '$0' risks causing data races; this is an error in the Swift 6 language mode
38 |
39 |            let onFulfilled: @convention(block) (JSValue) -> Void = {
40 |                 continuation.resume(returning: $0)
   |                              |- warning: sending '$0' risks causing data races; this is an error in the Swift 6 language mode
   |                              `- note: task-isolated '$0' is passed as a 'sending' parameter; Uses in callee may race with later task-isolated uses
41 |            }
42 |
[6/21] Compiling ECMASwift JSValue+isNil.swift
/Users/admin/builder/spi-builder-workspace/Sources/ECMASwift/Helpers/JSValue+callFunction.swift:14:30: warning: sending '$0' risks causing data races; this is an error in the Swift 6 language mode
12 |         try await withCheckedThrowingContinuation { continuation in
13 |             let onFulfilled: @convention(block) (JSValue) -> Void = {
14 |                 continuation.resume(returning: $0)
   |                              |- warning: sending '$0' risks causing data races; this is an error in the Swift 6 language mode
   |                              `- note: task-isolated '$0' is passed as a 'sending' parameter; Uses in callee may race with later task-isolated uses
15 |             }
16 |             let onRejected: @convention(block) (JSValue) -> Void = { error in
/Users/admin/builder/spi-builder-workspace/Sources/ECMASwift/Helpers/JSValue+callFunction.swift:40:30: warning: sending '$0' risks causing data races; this is an error in the Swift 6 language mode
38 |
39 |            let onFulfilled: @convention(block) (JSValue) -> Void = {
40 |                 continuation.resume(returning: $0)
   |                              |- warning: sending '$0' risks causing data races; this is an error in the Swift 6 language mode
   |                              `- note: task-isolated '$0' is passed as a 'sending' parameter; Uses in callee may race with later task-isolated uses
41 |            }
42 |
[7/23] Compiling ECMASwift URLSearchParams.swift
/Users/admin/builder/spi-builder-workspace/Sources/ECMASwift/Helpers/JSContext+callFunction.swift:30:30: warning: sending '$0' risks causing data races; this is an error in the Swift 6 language mode
28 |         try await withCheckedThrowingContinuation { continuation in
29 |             let onFulfilled: @convention(block) (JSValue) -> Void = {
30 |                 continuation.resume(returning: $0)
   |                              |- warning: sending '$0' risks causing data races; this is an error in the Swift 6 language mode
   |                              `- note: task-isolated '$0' is passed as a 'sending' parameter; Uses in callee may race with later task-isolated uses
31 |             }
32 |             let onRejected: @convention(block) (JSValue) -> Void = { error in
/Users/admin/builder/spi-builder-workspace/Sources/ECMASwift/Helpers/JSContext+callFunction.swift:57:30: warning: sending '$0' risks causing data races; this is an error in the Swift 6 language mode
55 |
56 |            let onFulfilled: @convention(block) (JSValue) -> Void = {
57 |                 continuation.resume(returning: $0)
   |                              |- warning: sending '$0' risks causing data races; this is an error in the Swift 6 language mode
   |                              `- note: task-isolated '$0' is passed as a 'sending' parameter; Uses in callee may race with later task-isolated uses
58 |            }
59 |
[8/23] Compiling ECMASwift JSContext+callFunction.swift
/Users/admin/builder/spi-builder-workspace/Sources/ECMASwift/Helpers/JSContext+callFunction.swift:30:30: warning: sending '$0' risks causing data races; this is an error in the Swift 6 language mode
28 |         try await withCheckedThrowingContinuation { continuation in
29 |             let onFulfilled: @convention(block) (JSValue) -> Void = {
30 |                 continuation.resume(returning: $0)
   |                              |- warning: sending '$0' risks causing data races; this is an error in the Swift 6 language mode
   |                              `- note: task-isolated '$0' is passed as a 'sending' parameter; Uses in callee may race with later task-isolated uses
31 |             }
32 |             let onRejected: @convention(block) (JSValue) -> Void = { error in
/Users/admin/builder/spi-builder-workspace/Sources/ECMASwift/Helpers/JSContext+callFunction.swift:57:30: warning: sending '$0' risks causing data races; this is an error in the Swift 6 language mode
55 |
56 |            let onFulfilled: @convention(block) (JSValue) -> Void = {
57 |                 continuation.resume(returning: $0)
   |                              |- warning: sending '$0' risks causing data races; this is an error in the Swift 6 language mode
   |                              `- note: task-isolated '$0' is passed as a 'sending' parameter; Uses in callee may race with later task-isolated uses
58 |            }
59 |
[9/23] Compiling ECMASwift Headers.swift
[10/23] Compiling ECMASwift Request.swift
[11/23] Compiling ECMASwift HTTPClient.swift
[12/23] Compiling ECMASwift FormData.swift
[13/23] Compiling ECMASwift AbortController.swift
[14/23] Compiling ECMASwift Fetch.swift
[15/23] Compiling ECMASwift Crypto.swift
[16/23] Compiling ECMASwift SublteCrypto.swift
[17/23] Compiling ECMASwift RequestBody.swift
[18/23] Compiling ECMASwift TextEncoder.swift
[19/23] Emitting module ECMASwift
[20/23] Compiling ECMASwift Blob.swift
[21/23] Compiling ECMASwift Console.swift
[22/23] Compiling ECMASwift JSValue+toType.swift
[23/23] Compiling ECMASwift JSRuntime.swift
Build complete! (5.54s)
Build complete.
{
  "dependencies" : [
  ],
  "manifest_display_name" : "ECMASwift",
  "name" : "ECMASwift",
  "path" : "/Users/admin/builder/spi-builder-workspace",
  "platforms" : [
    {
      "name" : "macos",
      "version" : "11.0"
    },
    {
      "name" : "ios",
      "version" : "14.0"
    },
    {
      "name" : "tvos",
      "version" : "14.0"
    },
    {
      "name" : "watchos",
      "version" : "7.0"
    }
  ],
  "products" : [
    {
      "name" : "ECMASwift",
      "targets" : [
        "ECMASwift"
      ],
      "type" : {
        "library" : [
          "automatic"
        ]
      }
    }
  ],
  "targets" : [
    {
      "c99name" : "ECMASwiftTests",
      "module_type" : "SwiftTarget",
      "name" : "ECMASwiftTests",
      "path" : "Tests/ECMASwiftTests",
      "sources" : [
        "BlobTests.swift",
        "CryptoTests.swift",
        "FetchTests.swift",
        "HeadersTests.swift",
        "RequestTests.swift",
        "SubtleCryptoTests.swift",
        "TextEncoderTests.swift",
        "TimerTests.swift",
        "URLSearchParamsTests.swift",
        "URLTests.swift"
      ],
      "target_dependencies" : [
        "ECMASwift"
      ],
      "type" : "test"
    },
    {
      "c99name" : "ECMASwift",
      "module_type" : "SwiftTarget",
      "name" : "ECMASwift",
      "path" : "Sources/ECMASwift",
      "product_memberships" : [
        "ECMASwift"
      ],
      "sources" : [
        "API/Blob/Blob.swift",
        "API/Console/Console.swift",
        "API/Crypto/Crypto.swift",
        "API/Crypto/SublteCrypto.swift",
        "API/Fetch/AbortController.swift",
        "API/Fetch/Fetch.swift",
        "API/Fetch/HTTPClient.swift",
        "API/FormData/FormData.swift",
        "API/Headers/Headers.swift",
        "API/Request/Request.swift",
        "API/Request/RequestBody.swift",
        "API/TextEncoder/TextEncoder.swift",
        "API/Timers/Timers.swift",
        "API/URL/URL.swift",
        "API/URLSearchParams/URLSearchParams.swift",
        "Helpers/JSContext+callFunction.swift",
        "Helpers/JSValue+callFunction.swift",
        "Helpers/JSValue+isNil.swift",
        "Helpers/JSValue+toType.swift",
        "JSRuntime.swift"
      ],
      "type" : "library"
    }
  ],
  "tools_version" : "5.10"
}
Done.