Swift Package Index

Build Information

Failed to build Promissum, reference main (34aa14), with Swift 6.4 for Wasm on 18 Sep 2026 04:05:36 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-53886769-1":/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/tomlokhorst/Promissum.git
Reference: main
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/tomlokhorst/Promissum
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 34aa142 Add async/await documentation to README
Cloned https://github.com/tomlokhorst/Promissum.git
Revision (git rev-parse @):
34aa14261488f99e1221eb3e534000ca6ecf9d8e
SUCCESS checkout https://github.com/tomlokhorst/Promissum.git at main
========================================
Build
========================================
Selected platform:         wasm
Swift version:             6.4
Building package at path:  $PWD
https://github.com/tomlokhorst/Promissum.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-53886769-1":/host -w "$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/Promissum/DispatchMethod.swift:14:14: error: cannot find type 'DispatchQueue' in scope
12 |   case unspecified
13 |   case synchronous
14 |   case queue(DispatchQueue)
   |              `- error: cannot find type 'DispatchQueue' in scope
15 | }
16 |
/host/spi-builder-workspace/Sources/Promissum/Promise.swift:298:34: error: cannot find type 'DispatchQueue' in scope
296 |
297 |   /// Returns a Promise that dispatches its handlers on the specified dispatch queue.
298 |   public func dispatch(on queue: DispatchQueue) -> Promise<Value, Error> {
    |                                  `- error: cannot find type 'DispatchQueue' in scope
299 |     let key = DispatchSpecificKey<Void>()
300 |     queue.setSpecific(key: key, value: ())
/host/spi-builder-workspace/Sources/Promissum/Promise.swift:310:73: error: cannot find type 'DispatchSpecificKey' in scope
308 |   }
309 |
310 |   private func dispatch(on dispatchMethod: DispatchMethod, dispatchKey: DispatchSpecificKey<Void>) -> Promise<Value, Error> {
    |                                                                         `- error: cannot find type 'DispatchSpecificKey' in scope
311 |     let resultSource = PromiseSource<Value, Error>(
312 |       state: .unresolved,
/host/spi-builder-workspace/Sources/Promissum/Promise.swift:479:53: error: cannot find type 'DispatchQueue' in scope
477 |
478 |   /// Return a Promise with the resolve or reject delayed by the specified number of seconds.
479 |   public func delay(_ seconds: TimeInterval, queue: DispatchQueue? = nil) -> Promise<Value, Error> {
    |                                                     `- error: cannot find type 'DispatchQueue' in scope
480 |     let dispatchQueue = queue ?? source.dispatchMethod.queue
481 |
/host/spi-builder-workspace/Sources/Promissum/Promise.swift:501:14: error: cannot find type 'DispatchQueue' in scope
499 |
500 | private extension DispatchMethod {
501 |   var queue: DispatchQueue {
    |              `- error: cannot find type 'DispatchQueue' in scope
502 |     switch self {
503 |     case .unspecified:
/host/spi-builder-workspace/Sources/Promissum/PromiseSource.swift:70:29: error: cannot find type 'DispatchSpecificKey' in scope
 68 | */
 69 | public class PromiseSource<Value, Error> where Error: Swift.Error {
 70 |   internal let dispatchKey: DispatchSpecificKey<Void>
    |                             `- error: cannot find type 'DispatchSpecificKey' in scope
 71 |   internal let dispatchMethod: DispatchMethod
 72 |
/host/spi-builder-workspace/Sources/Promissum/PromiseSource.swift:119:44: error: cannot find type 'DispatchSpecificKey' in scope
117 |   }
118 |
119 |   internal init(state: State, dispatchKey: DispatchSpecificKey<Void>, dispatchMethod: DispatchMethod, warnUnresolvedDeinit: Bool) {
    |                                            `- error: cannot find type 'DispatchSpecificKey' in scope
120 |     self.internalState = PromiseSourceState(state: state)
121 |     self.dispatchKey = dispatchKey
/host/spi-builder-workspace/Sources/Promissum/PromiseSource.swift:253:86: error: cannot find type 'DispatchSpecificKey' in scope
251 | }
252 |
253 | internal func callHandlers<T>(_ handlers: [(T) -> Void], with value: T, dispatchKey: DispatchSpecificKey<Void>, dispatchMethod: DispatchMethod) {
    |                                                                                      `- error: cannot find type 'DispatchSpecificKey' in scope
254 |
255 |   for handler in handlers {
Failed frontend command:
/usr/bin/swift-frontend -frontend -emit-module -experimental-skip-non-inlinable-function-bodies-without-types /host/spi-builder-workspace/Sources/Promissum/AsyncExtensions.swift /host/spi-builder-workspace/Sources/Promissum/Combinators.swift /host/spi-builder-workspace/Sources/Promissum/DispatchMethod.swift /host/spi-builder-workspace/Sources/Promissum/Promise.swift /host/spi-builder-workspace/Sources/Promissum/PromiseSource.swift /host/spi-builder-workspace/Sources/Promissum/Result.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/Promissum.build/Debug-webassembly-wasm32/Promissum-t.build/DerivedSources-normal/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/Promissum.build/Debug-webassembly-wasm32/Promissum-t.build/DerivedSources/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/Promissum.build/Debug-webassembly-wasm32/Promissum-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name Promissum -const-gather-protocols-file /host/spi-builder-workspace/.build/out/Intermediates.noindex/Promissum.build/Debug-webassembly-wasm32/Promissum-t.build/Objects-normal/wasm32/Promissum_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/Promissum.build/Debug-webassembly-wasm32/Promissum-t.build/Objects-normal/wasm32/Modules/Promissum.swiftdoc -emit-module-source-info-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Promissum.build/Debug-webassembly-wasm32/Promissum-t.build/Objects-normal/wasm32/Modules/Promissum.swiftsourceinfo -emit-objc-header-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Promissum.build/Debug-webassembly-wasm32/Promissum-t.build/Objects-normal/wasm32/Promissum-Swift.h -serialize-diagnostics-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Promissum.build/Debug-webassembly-wasm32/Promissum-t.build/Objects-normal/wasm32/Promissum-primary-emit-module.dia -emit-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Promissum.build/Debug-webassembly-wasm32/Promissum-t.build/Objects-normal/wasm32/Promissum-primary-emit-module.d -parse-as-library -o /host/spi-builder-workspace/.build/out/Intermediates.noindex/Promissum.build/Debug-webassembly-wasm32/Promissum-t.build/Objects-normal/wasm32/Modules/Promissum.swiftmodule
error: Build failed
BUILD FAILURE 6.4 wasm