Swift Package Index

Build Information

Failed to build Async, reference 2.1.0 (a66d1a), with Swift 6.4 for Wasm on 19 Sep 2026 11:52:01 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-54344847-1":/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/duemunk/async.git
Reference: 2.1.0
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/duemunk/async
 * tag               2.1.0      -> FETCH_HEAD
HEAD is now at a66d1a6 Merge pull request #143 from colemcampbell/swiftpm
Cloned https://github.com/duemunk/async.git
Revision (git rev-parse @):
a66d1a6efce6c1296ab228bdc3ec7da2b8968138
SUCCESS checkout https://github.com/duemunk/async.git at 2.1.0
========================================
Build
========================================
Selected platform:         wasm
Swift version:             6.4
Building package at path:  $PWD
https://github.com/duemunk/async.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-54344847-1":/host -w "$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/Async/Async.swift:44:83: error: cannot find type 'DispatchQueue' in scope
 42 |  */
 43 | private enum GCD {
 44 |     case main, userInteractive, userInitiated, utility, background, custom(queue: DispatchQueue)
    |                                                                                   `- error: cannot find type 'DispatchQueue' in scope
 45 |
 46 |     var queue: DispatchQueue {
/host/spi-builder-workspace/Sources/Async/Async.swift:46:16: error: cannot find type 'DispatchQueue' in scope
 44 |     case main, userInteractive, userInitiated, utility, background, custom(queue: DispatchQueue)
 45 |
 46 |     var queue: DispatchQueue {
    |                `- error: cannot find type 'DispatchQueue' in scope
 47 |         switch self {
 48 |         case .main: return .main
/host/spi-builder-workspace/Sources/Async/Async.swift:132:24: error: cannot find type 'DispatchWorkItem' in scope
130 |      Private property to hold internally on to a `@convention(block) () -> Swift.Void`
131 |     */
132 |     private let block: DispatchWorkItem
    |                        `- error: cannot find type 'DispatchWorkItem' in scope
133 |
134 |     private let input: Reference<In>?
/host/spi-builder-workspace/Sources/Async/Async.swift:142:27: error: cannot find type 'DispatchWorkItem' in scope
140 |      Private init that takes a `@convention(block) () -> Swift.Void`
141 |      */
142 |     private init(_ block: DispatchWorkItem, input: Reference<In>? = nil, output: Reference<Out> = Reference()) {
    |                           `- error: cannot find type 'DispatchWorkItem' in scope
143 |         self.block = block
144 |         self.input = input
/host/spi-builder-workspace/Sources/Async/Async.swift:243:41: error: cannot find type 'DispatchQueue' in scope
241 |      */
242 |     @discardableResult
243 |     public static func custom<O>(queue: DispatchQueue, after seconds: Double? = nil, _ block: @escaping () -> O) -> AsyncBlock<Void, O> {
    |                                         `- error: cannot find type 'DispatchQueue' in scope
244 |         Async.async(after: seconds, block: block, queue: .custom(queue: queue))
245 |     }
/host/spi-builder-workspace/Sources/Async/Async.swift:372:34: error: cannot find type 'DispatchQueue' in scope
370 |      */
371 |     @discardableResult
372 |     public func custom<O>(queue: DispatchQueue, after seconds: Double? = nil, _ chainingBlock: @escaping (Out) -> O) -> AsyncBlock<Out, O> {
    |                                  `- error: cannot find type 'DispatchQueue' in scope
373 |         chain(after: seconds, block: chainingBlock, queue: .custom(queue: queue))
374 |     }
/host/spi-builder-workspace/Sources/Async/Async.swift:412:49: error: cannot find type 'DispatchTimeoutResult' in scope
410 |      */
411 |     @discardableResult
412 |     public func wait(seconds: Double? = nil) -> DispatchTimeoutResult {
    |                                                 `- error: cannot find type 'DispatchTimeoutResult' in scope
413 |         let timeout = seconds
414 |             .flatMap { DispatchTime.now() + $0 }
/host/spi-builder-workspace/Sources/Async/Async.swift:536:38: error: cannot find type 'DispatchQueue' in scope
534 |          - block: The block that is to be passed to be run on a .
535 |      */
536 |     public static func custom(queue: DispatchQueue, iterations: Int, block: @escaping (Int) -> ()) {
    |                                      `- error: cannot find type 'DispatchQueue' in scope
537 |         queue.async {
538 |             DispatchQueue.concurrentPerform(iterations: iterations, execute: block)
/host/spi-builder-workspace/Sources/Async/Async.swift:595:25: error: cannot find 'DispatchGroup' in scope
593 |      Private property to internally on to a `dispatch_group_t`
594 |     */
595 |     private let group = DispatchGroup()
    |                         `- error: cannot find 'DispatchGroup' in scope
596 |
597 |     /**
/host/spi-builder-workspace/Sources/Async/Async.swift:694:31: error: cannot find type 'DispatchQueue' in scope
692 |          - block: The block that is to be passed to be run on the queue
693 |      */
694 |     public func custom(queue: DispatchQueue, block: @escaping @convention(block) () -> Swift.Void) {
    |                               `- error: cannot find type 'DispatchQueue' in scope
695 |         async(block: block, queue: .custom(queue: queue))
696 |     }
/host/spi-builder-workspace/Sources/Async/Async.swift:708:49: error: cannot find type 'DispatchTimeoutResult' in scope
706 |      */
707 |     @discardableResult
708 |     public func wait(seconds: Double? = nil) -> DispatchTimeoutResult {
    |                                                 `- error: cannot find type 'DispatchTimeoutResult' in scope
709 |         let timeout = seconds
710 |             .flatMap { DispatchTime.now() + $0 }
/host/spi-builder-workspace/Sources/Async/Async.swift:735:18: error: cannot find type 'qos_class_t' in scope
733 | Extension to add description string for each quality of service class.
734 | */
735 | public extension qos_class_t {
    |                  `- error: cannot find type 'qos_class_t' in scope
736 |
737 |     /**
/host/spi-builder-workspace/Sources/Async/Async.swift:762:18: error: cannot find type 'DispatchQoS' in scope
760 |  Extension to add description string for each quality of service class.
761 |  */
762 | public extension DispatchQoS.QoSClass {
    |                  `- error: cannot find type 'DispatchQoS' in scope
763 |
764 |     var description: String {
Failed frontend command:
/usr/bin/swift-frontend -frontend -emit-module -experimental-skip-non-inlinable-function-bodies-without-types /host/spi-builder-workspace/Sources/Async/Async.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/Async.build/Debug-webassembly-wasm32/Async-t.build/DerivedSources-normal/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/Async.build/Debug-webassembly-wasm32/Async-t.build/DerivedSources/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/Async.build/Debug-webassembly-wasm32/Async-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name Async -const-gather-protocols-file /host/spi-builder-workspace/.build/out/Intermediates.noindex/Async.build/Debug-webassembly-wasm32/Async-t.build/Objects-normal/wasm32/Async_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/Async.build/Debug-webassembly-wasm32/Async-t.build/Objects-normal/wasm32/Modules/Async.swiftdoc -emit-module-source-info-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Async.build/Debug-webassembly-wasm32/Async-t.build/Objects-normal/wasm32/Modules/Async.swiftsourceinfo -emit-objc-header-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Async.build/Debug-webassembly-wasm32/Async-t.build/Objects-normal/wasm32/Async-Swift.h -serialize-diagnostics-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Async.build/Debug-webassembly-wasm32/Async-t.build/Objects-normal/wasm32/Async-primary-emit-module.dia -emit-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Async.build/Debug-webassembly-wasm32/Async-t.build/Objects-normal/wasm32/Async-primary-emit-module.d -parse-as-library -o /host/spi-builder-workspace/.build/out/Intermediates.noindex/Async.build/Debug-webassembly-wasm32/Async-t.build/Objects-normal/wasm32/Modules/Async.swiftmodule
error: Build failed
BUILD FAILURE 6.4 wasm