Swift Package Index

Build Information

Failed to build Future, reference 1.4.0 (ff9634), with Swift 6.4 for Wasm on 17 Sep 2026 00:47:31 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-54344843-0":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/saguaro1/spi-images:wasm-6.4-latest swift build --swift-sdk swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm 2>&1

Build Log

========================================
RunAll
========================================
Builder version: 5.1.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/kean/Future.git
Reference: 1.4.0
Initialized empty Git repository in /host/spi-builder-workspace/.git/
hint: Using 'master' as the name for the initial branch. This default branch name
hint: is subject to change. To configure the initial branch name to use in all
hint: of your new repositories, which will suppress this warning, call:
hint:
hint: 	git config --global init.defaultBranch <name>
hint:
hint: Names commonly chosen instead of 'master' are 'main', 'trunk' and
hint: 'development'. The just-created branch can be renamed via this command:
hint:
hint: 	git branch -m <name>
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
========================================
Build
========================================
Selected platform:         wasm
Swift version:             6.4
Building package at path:  $PWD
https://github.com/kean/Future.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-54344843-0":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/saguaro1/spi-images:wasm-6.4-latest swift build --swift-sdk swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm 2>&1
wasm-6.4-latest: Pulling from saguaro1/spi-images
Digest: sha256:4328fdb43c680d205c1d6761b1e3267aa38277eefdda9ddfb17b6a0f1a77857a
Status: Image is up to date for registry.gitlab.com/saguaro1/spi-images:wasm-6.4-latest
Building for debugging...
[Planning deferred tasks]
error: SwiftCompile normal wasm32 failed with a nonzero exit code. Command line:     cd /host

/host/spi-builder-workspace/Sources/Future.swift:78:35: error: cannot find type 'DispatchQueue' in scope
 76 |     /// Returns a new future which dispatches the callbacks on the given scheduler.
 77 |     /// This includes both `on` method and the composition functions like `map`.
 78 |     public func observe(on queue: DispatchQueue) -> Future {
    |                                   `- error: cannot find type 'DispatchQueue' in scope
 79 |         Future(resolver: resolver, scheduler: Scheduler.async(on: queue))
 80 |     }
/host/spi-builder-workspace/Sources/Future.swift:298:40: error: cannot find 'DispatchQueue' in scope
296 |     /// asynchronously on the main thread.
297 |     public static let main: ScheduleWork = { work in
298 |         Thread.isMainThread ? work() : DispatchQueue.main.async(execute: work)
    |                                        `- error: cannot find 'DispatchQueue' in scope
299 |     }
300 |
/host/spi-builder-workspace/Sources/Future.swift:307:40: error: cannot find type 'DispatchQueue' in scope
305 |
306 |     /// Runs asynchronously on the given queue.
307 |     public static func async(on queue: DispatchQueue, flags: DispatchWorkItemFlags = []) -> ScheduleWork {
    |                                        `- error: cannot find type 'DispatchQueue' in scope
308 |         return { work in
309 |             queue.async(flags: flags, execute: work)
/host/spi-builder-workspace/Sources/Future.swift:307:62: error: cannot find type 'DispatchWorkItemFlags' in scope
305 |
306 |     /// Runs asynchronously on the given queue.
307 |     public static func async(on queue: DispatchQueue, flags: DispatchWorkItemFlags = []) -> ScheduleWork {
    |                                                              `- error: cannot find type 'DispatchWorkItemFlags' in scope
308 |         return { work in
309 |             queue.async(flags: flags, execute: work)
/host/spi-builder-workspace/Sources/FutureExtensions.swift:37:63: error: cannot find type 'DispatchQueue' in scope
 35 |     ///     - seconds: The time interval after which the future succeeds.
 36 |     ///     - queue: The queue on which futures succeeds, `.global` by default.
 37 |     public static func after(seconds: TimeInterval, on queue: DispatchQueue = .global()) -> Future<Void, Never> {
    |                                                               `- error: cannot find type 'DispatchQueue' in scope
 38 |         after(deadline: .now() + seconds, on: queue)
 39 |     }
/host/spi-builder-workspace/Sources/FutureExtensions.swift:46:42: error: cannot find type 'DispatchTimeInterval' in scope
 44 |     ///     - interval: The time interval after which the future succeeds.
 45 |     ///     - queue: The queue on which futures succeeds, `.global` by default.
 46 |     public static func after(_ interval: DispatchTimeInterval, on queue: DispatchQueue = .global()) -> Future<Void, Never> {
    |                                          `- error: cannot find type 'DispatchTimeInterval' in scope
 47 |         after(deadline: .now() + interval, on: queue)
 48 |     }
/host/spi-builder-workspace/Sources/FutureExtensions.swift:46:74: error: cannot find type 'DispatchQueue' in scope
 44 |     ///     - interval: The time interval after which the future succeeds.
 45 |     ///     - queue: The queue on which futures succeeds, `.global` by default.
 46 |     public static func after(_ interval: DispatchTimeInterval, on queue: DispatchQueue = .global()) -> Future<Void, Never> {
    |                                                                          `- error: cannot find type 'DispatchQueue' in scope
 47 |         after(deadline: .now() + interval, on: queue)
 48 |     }
/host/spi-builder-workspace/Sources/FutureExtensions.swift:50:41: error: cannot find type 'DispatchTime' in scope
 48 |     }
 49 |
 50 |     private static func after(deadline: DispatchTime, on queue: DispatchQueue = .global()) -> Future<Void, Never> {
    |                                         `- error: cannot find type 'DispatchTime' in scope
 51 |         let promise = Promise()
 52 |         queue.asyncAfter(deadline: deadline) {
/host/spi-builder-workspace/Sources/FutureExtensions.swift:50:65: error: cannot find type 'DispatchQueue' in scope
 48 |     }
 49 |
 50 |     private static func after(deadline: DispatchTime, on queue: DispatchQueue = .global()) -> Future<Void, Never> {
    |                                                                 `- error: cannot find type 'DispatchQueue' in scope
 51 |         let promise = Promise()
 52 |         queue.asyncAfter(deadline: deadline) {
/host/spi-builder-workspace/Sources/FutureExtensions.swift:199:25: error: cannot find 'DispatchQueue' in scope
197 | }
198 |
199 | private let waitQueue = DispatchQueue(label: "com.github.kean.future.wait-queue", attributes: .concurrent)
    |                         `- error: cannot find 'DispatchQueue' in scope
200 |
Failed frontend command:
/usr/bin/swift-frontend -frontend -emit-module -experimental-skip-non-inlinable-function-bodies-without-types /host/spi-builder-workspace/Sources/CancellationToken.swift /host/spi-builder-workspace/Sources/Future.swift /host/spi-builder-workspace/Sources/FutureExtensions.swift /host/spi-builder-workspace/Sources/FutureOperators.swift -target wasm32-unknown-wasip1 -disable-objc-interop -sdk /root/.swiftpm/swift-sdks/swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm.artifactbundle/swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm/wasm32-unknown-wasip1/WASI.sdk -sysroot /root/.swiftpm/swift-sdks/swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm.artifactbundle/swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm/wasm32-unknown-wasip1/WASI.sdk -I /host/spi-builder-workspace/.build/out/Products/Debug-webassembly-wasm32 -module-cache-path /host/spi-builder-workspace/.build/out/ModuleCache.noindex -color-diagnostics -Xcc -fcolor-diagnostics -enable-testing -g -debug-info-format\=dwarf -dwarf-version\=4 -swift-version 5 -Onone -D SWIFT_PACKAGE -D DEBUG -D SWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -D Xcode -serialize-debugging-options -enable-experimental-feature DebugDescriptionMacro -empty-abi-descriptor -external-plugin-path /usr/lib/swift/host/plugins/testing\#/usr/bin/swift-plugin-server -validate-clang-modules-once -clang-build-session-file /host/spi-builder-workspace/.build/out/ModuleCache.noindex/Session.modulevalidation -Xcc -working-directory -Xcc /host -resource-dir /root/.swiftpm/swift-sdks/swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm.artifactbundle/swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm/wasm32-unknown-wasip1/swift.xctoolchain/usr/lib/swift_static -use-static-resource-dir -enable-anonymous-context-mangled-names -file-compilation-dir /host -Xcc -resource-dir -Xcc /root/.swiftpm/swift-sdks/swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm.artifactbundle/swift-6.4.x-DEVELOPMENT-SNAPSHOT-2026-09-04-a_wasm/wasm32-unknown-wasip1/swift.xctoolchain/usr/lib/swift_static/clang -Xcc -D_LIBCPP_HARDENING_MODE\=_LIBCPP_HARDENING_MODE_DEBUG -Xcc -fmodules-prune-interval\=86400 -Xcc -fmodules-prune-after\=345600 -Xcc -I/host/spi-builder-workspace/.build/out/Products/Debug-webassembly-wasm32/include -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/Future.build/Debug-webassembly-wasm32/Future-t.build/DerivedSources-normal/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/Future.build/Debug-webassembly-wasm32/Future-t.build/DerivedSources/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/Future.build/Debug-webassembly-wasm32/Future-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name Future -const-gather-protocols-file /host/spi-builder-workspace/.build/out/Intermediates.noindex/Future.build/Debug-webassembly-wasm32/Future-t.build/Objects-normal/wasm32/Future_const_extract_protocols.json -in-process-plugin-server-path /usr/lib/swift/host/libSwiftInProcPluginServer.so -plugin-path /usr/lib/swift/host/plugins -plugin-path /usr/local/lib/swift/host/plugins -emit-module-doc-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Future.build/Debug-webassembly-wasm32/Future-t.build/Objects-normal/wasm32/Modules/Future.swiftdoc -emit-module-source-info-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Future.build/Debug-webassembly-wasm32/Future-t.build/Objects-normal/wasm32/Modules/Future.swiftsourceinfo -emit-objc-header-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Future.build/Debug-webassembly-wasm32/Future-t.build/Objects-normal/wasm32/Future-Swift.h -serialize-diagnostics-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Future.build/Debug-webassembly-wasm32/Future-t.build/Objects-normal/wasm32/Future-primary-emit-module.dia -emit-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Future.build/Debug-webassembly-wasm32/Future-t.build/Objects-normal/wasm32/Future-primary-emit-module.d -parse-as-library -o /host/spi-builder-workspace/.build/out/Intermediates.noindex/Future.build/Debug-webassembly-wasm32/Future-t.build/Objects-normal/wasm32/Modules/Future.swiftmodule
error: Build failed
BUILD FAILURE 6.4 wasm