Swift Package IndexBuild Information
Successful build of Future, reference 1.4.0 (ff9634), with Swift 6.1 for macOS (SPM) on 25 Apr 2025 20:52:36 UTC.
Swift 6 data race errors: 3
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 InferSendableFromCapturesBuild Log
========================================
RunAll
========================================
Builder version: 4.61.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/kean/Future.git
Reference: 1.4.0
Initialized empty Git repository in /Users/admin/builder/spi-builder-workspace/.git/
From https://github.com/kean/Future
* tag 1.4.0 -> FETCH_HEAD
HEAD is now at ff9634c Version 1.4.0
Cloned https://github.com/kean/Future.git
Revision (git rev-parse @):
ff9634c819962aa78f7bb360fdae7299d62f1cdc
SUCCESS checkout https://github.com/kean/Future.git at 1.4.0
========================================
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": "future",
"name": "Future",
"url": "https://github.com/kean/Future.git",
"version": "unspecified",
"path": "/Users/admin/builder/spi-builder-workspace/.resolve-product-dependencies/.build/checkouts/Future",
"dependencies": [
]
}
]
}
Fetching https://github.com/kean/Future.git
[1/1723] Fetching future
Fetched https://github.com/kean/Future.git from cache (0.84s)
Creating working copy for https://github.com/kean/Future.git
Working copy of https://github.com/kean/Future.git resolved at 1.4.0 (ff9634c)
warning: '.resolve-product-dependencies': dependency 'future' 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/kean/Future.git
https://github.com/kean/Future.git
{
"dependencies" : [
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"name" : "Future",
"path" : "/Users/admin/builder/spi-builder-workspace",
"platforms" : [
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"name" : "macos",
"version" : "10.13"
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"name" : "ios",
"version" : "11.0"
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"path" : "Tests/FutureTests",
"sources" : [
"A+Tests.swift",
"CancellationTokenTests.swift",
"Extensions.swift",
"FutureExtensionsTests.swift",
"FutureTests.swift",
"StressTests.swift"
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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
[3/7] Compiling Future CancellationToken.swift
[4/7] Emitting module Future
/Users/admin/builder/spi-builder-workspace/Sources/Future.swift:292:23: warning: static property 'default' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
290 | /// behavior where callbacks attached via `on` method are always called on
291 | /// the main thread.
292 | public static var `default` = Scheduler.main
| |- warning: static property 'default' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
| |- note: convert 'default' to a 'let' constant to make 'Sendable' shared state immutable
| |- note: add '@MainActor' to make static property 'default' part of global actor 'MainActor'
| `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
293 |
294 | /// If the task finishes on the main thread, the callbacks are executed
<unknown>:0: note: a function type must be marked '@Sendable' to conform to 'Sendable'
/Users/admin/builder/spi-builder-workspace/Sources/Future.swift:297:23: warning: static property 'main' is not concurrency-safe because non-'Sendable' type 'ScheduleWork' (aka '(@escaping () -> ()) -> ()') may have shared mutable state; this is an error in the Swift 6 language mode
295 | /// immediately. Otherwise, they are dispatched to be executed
296 | /// asynchronously on the main thread.
297 | public static let main: ScheduleWork = { work in
| |- warning: static property 'main' is not concurrency-safe because non-'Sendable' type 'ScheduleWork' (aka '(@escaping () -> ()) -> ()') may have shared mutable state; this is an error in the Swift 6 language mode
| |- note: add '@MainActor' to make static property 'main' part of global actor 'MainActor'
| `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
298 | Thread.isMainThread ? work() : DispatchQueue.main.async(execute: work)
299 | }
/Users/admin/builder/spi-builder-workspace/Sources/Future.swift:298:74: warning: passing non-sendable parameter 'work' to function expecting a @Sendable closure
295 | /// immediately. Otherwise, they are dispatched to be executed
296 | /// asynchronously on the main thread.
297 | public static let main: ScheduleWork = { work in
| `- note: parameter 'work' is implicitly non-sendable
298 | Thread.isMainThread ? work() : DispatchQueue.main.async(execute: work)
| `- warning: passing non-sendable parameter 'work' to function expecting a @Sendable closure
299 | }
300 |
<unknown>:0: note: a function type must be marked '@Sendable' to conform to 'Sendable'
/Users/admin/builder/spi-builder-workspace/Sources/Future.swift:302:23: warning: static property 'immediate' is not concurrency-safe because non-'Sendable' type 'ScheduleWork' (aka '(@escaping () -> ()) -> ()') may have shared mutable state; this is an error in the Swift 6 language mode
300 |
301 | /// Immediately executes the given closure.
302 | public static let immediate: ScheduleWork = { work in
| |- warning: static property 'immediate' is not concurrency-safe because non-'Sendable' type 'ScheduleWork' (aka '(@escaping () -> ()) -> ()') may have shared mutable state; this is an error in the Swift 6 language mode
| |- note: add '@MainActor' to make static property 'immediate' part of global actor 'MainActor'
| `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
303 | work()
304 | }
[5/7] Compiling Future FutureOperators.swift
[6/7] Compiling Future FutureExtensions.swift
/Users/admin/builder/spi-builder-workspace/Sources/FutureExtensions.swift:53:13: warning: capture of 'promise' with non-sendable type 'Future<(), Never>.Promise' in a '@Sendable' closure
51 | let promise = Promise()
52 | queue.asyncAfter(deadline: deadline) {
53 | promise.succeed(value: ()) // Never produces an error
| `- warning: capture of 'promise' with non-sendable type 'Future<(), Never>.Promise' in a '@Sendable' closure
54 | }
55 | return promise.future
/Users/admin/builder/spi-builder-workspace/Sources/Future.swift:202:24: note: class 'Promise' does not conform to the 'Sendable' protocol
200 |
201 | /// A promise to provide a result later.
202 | public final class Promise: CustomDebugStringConvertible {
| `- note: class 'Promise' does not conform to the 'Sendable' protocol
203 | private var memoizedResult: Result? // nil when pending
204 | private var inlinedHandler: ((Result) -> Void)?
[7/7] Compiling Future Future.swift
/Users/admin/builder/spi-builder-workspace/Sources/Future.swift:292:23: warning: static property 'default' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
290 | /// behavior where callbacks attached via `on` method are always called on
291 | /// the main thread.
292 | public static var `default` = Scheduler.main
| |- warning: static property 'default' is not concurrency-safe because it is nonisolated global shared mutable state; this is an error in the Swift 6 language mode
| |- note: convert 'default' to a 'let' constant to make 'Sendable' shared state immutable
| |- note: add '@MainActor' to make static property 'default' part of global actor 'MainActor'
| `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
293 |
294 | /// If the task finishes on the main thread, the callbacks are executed
<unknown>:0: note: a function type must be marked '@Sendable' to conform to 'Sendable'
/Users/admin/builder/spi-builder-workspace/Sources/Future.swift:297:23: warning: static property 'main' is not concurrency-safe because non-'Sendable' type 'ScheduleWork' (aka '(@escaping () -> ()) -> ()') may have shared mutable state; this is an error in the Swift 6 language mode
295 | /// immediately. Otherwise, they are dispatched to be executed
296 | /// asynchronously on the main thread.
297 | public static let main: ScheduleWork = { work in
| |- warning: static property 'main' is not concurrency-safe because non-'Sendable' type 'ScheduleWork' (aka '(@escaping () -> ()) -> ()') may have shared mutable state; this is an error in the Swift 6 language mode
| |- note: add '@MainActor' to make static property 'main' part of global actor 'MainActor'
| `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
298 | Thread.isMainThread ? work() : DispatchQueue.main.async(execute: work)
299 | }
/Users/admin/builder/spi-builder-workspace/Sources/Future.swift:298:74: warning: passing non-sendable parameter 'work' to function expecting a @Sendable closure
295 | /// immediately. Otherwise, they are dispatched to be executed
296 | /// asynchronously on the main thread.
297 | public static let main: ScheduleWork = { work in
| `- note: parameter 'work' is implicitly non-sendable
298 | Thread.isMainThread ? work() : DispatchQueue.main.async(execute: work)
| `- warning: passing non-sendable parameter 'work' to function expecting a @Sendable closure
299 | }
300 |
<unknown>:0: note: a function type must be marked '@Sendable' to conform to 'Sendable'
/Users/admin/builder/spi-builder-workspace/Sources/Future.swift:302:23: warning: static property 'immediate' is not concurrency-safe because non-'Sendable' type 'ScheduleWork' (aka '(@escaping () -> ()) -> ()') may have shared mutable state; this is an error in the Swift 6 language mode
300 |
301 | /// Immediately executes the given closure.
302 | public static let immediate: ScheduleWork = { work in
| |- warning: static property 'immediate' is not concurrency-safe because non-'Sendable' type 'ScheduleWork' (aka '(@escaping () -> ()) -> ()') may have shared mutable state; this is an error in the Swift 6 language mode
| |- note: add '@MainActor' to make static property 'immediate' part of global actor 'MainActor'
| `- note: disable concurrency-safety checks if accesses are protected by an external synchronization mechanism
303 | work()
304 | }
/Users/admin/builder/spi-builder-workspace/Sources/Future.swift:309:48: warning: passing non-sendable parameter 'work' to function expecting a @Sendable closure
306 | /// Runs asynchronously on the given queue.
307 | public static func async(on queue: DispatchQueue, flags: DispatchWorkItemFlags = []) -> ScheduleWork {
308 | return { work in
| `- note: parameter 'work' is implicitly non-sendable
309 | queue.async(flags: flags, execute: work)
| `- warning: passing non-sendable parameter 'work' to function expecting a @Sendable closure
310 | }
311 | }
Build complete! (4.52s)
Build complete.
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Done.