Swift Package Index

Build Information

Failed to build Watchdog, reference master (2df9ac), with Swift 6.4 for Wasm on 17 Sep 2026 19:58:10 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-54344847-0":/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/wojteklu/Watchdog.git
Reference: master
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/wojteklu/Watchdog
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 2df9acf Add support for SwiftPM (#51)
Cloned https://github.com/wojteklu/Watchdog.git
Revision (git rev-parse @):
2df9acf8472a1f1146fc0f41e37d3f424dba72d6
SUCCESS checkout https://github.com/wojteklu/Watchdog.git at master
========================================
Build
========================================
Selected platform:         wasm
Swift version:             6.4
Building package at path:  $PWD
https://github.com/wojteklu/Watchdog.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-54344847-0":/host -w "$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/Classes/Watchdog.swift:7:6: error: Objective-C interoperability is disabled
 5 |     fileprivate let pingThread: PingThread
 6 |
 7 |     @objc public static let defaultThreshold = 0.4
   |      `- error: Objective-C interoperability is disabled
 8 |
 9 |     /// Convenience initializer that allows you to construct a `WatchDog` object with default behavior.
/host/spi-builder-workspace/Classes/Watchdog.swift:12:6: error: Objective-C interoperability is disabled
10 |     /// - parameter threshold: number of seconds that must pass to consider the main thread blocked.
11 |     /// - parameter strictMode: boolean value that stops the execution whenever the threshold is reached.
12 |     @objc public convenience init(threshold: Double = Watchdog.defaultThreshold, strictMode: Bool = false) {
   |      `- error: Objective-C interoperability is disabled
13 |         let message = "👮 Main thread was blocked for " + String(format: "%.2f", threshold) + "s 👮"
14 |
/host/spi-builder-workspace/Classes/Watchdog.swift:27:6: error: Objective-C interoperability is disabled
25 |     /// - parameter threshold: number of seconds that must pass to consider the main thread blocked.
26 |     /// - parameter watchdogFiredCallback: a callback that will be called when the the threshold is reached
27 |     @objc public init(threshold: Double = Watchdog.defaultThreshold, watchdogFiredCallback: @escaping () -> Void) {
   |      `- error: Objective-C interoperability is disabled
28 |         self.pingThread = PingThread(threshold: threshold, handler: watchdogFiredCallback)
29 |
/host/spi-builder-workspace/Classes/Watchdog.swift:55:33: error: cannot find 'DispatchSemaphore' in scope
53 |     private var _pingTaskIsRunning = false
54 |     private let pingTaskIsRunningLock = NSObject()
55 |     fileprivate var semaphore = DispatchSemaphore(value: 0)
   |                                 `- error: cannot find 'DispatchSemaphore' in scope
56 |     fileprivate let threshold: Double
57 |     fileprivate let handler: () -> Void
Failed frontend command:
/usr/bin/swift-frontend -frontend -emit-module -experimental-skip-non-inlinable-function-bodies-without-types /host/spi-builder-workspace/Classes/Watchdog.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 4.2 -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/Watchdog.build/Debug-webassembly-wasm32/Watchdog-t.build/DerivedSources-normal/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/Watchdog.build/Debug-webassembly-wasm32/Watchdog-t.build/DerivedSources/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/Watchdog.build/Debug-webassembly-wasm32/Watchdog-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name Watchdog -const-gather-protocols-file /host/spi-builder-workspace/.build/out/Intermediates.noindex/Watchdog.build/Debug-webassembly-wasm32/Watchdog-t.build/Objects-normal/wasm32/Watchdog_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/Watchdog.build/Debug-webassembly-wasm32/Watchdog-t.build/Objects-normal/wasm32/Modules/Watchdog.swiftdoc -emit-module-source-info-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Watchdog.build/Debug-webassembly-wasm32/Watchdog-t.build/Objects-normal/wasm32/Modules/Watchdog.swiftsourceinfo -emit-objc-header-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Watchdog.build/Debug-webassembly-wasm32/Watchdog-t.build/Objects-normal/wasm32/Watchdog-Swift.h -serialize-diagnostics-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Watchdog.build/Debug-webassembly-wasm32/Watchdog-t.build/Objects-normal/wasm32/Watchdog-primary-emit-module.dia -emit-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/Watchdog.build/Debug-webassembly-wasm32/Watchdog-t.build/Objects-normal/wasm32/Watchdog-primary-emit-module.d -parse-as-library -o /host/spi-builder-workspace/.build/out/Intermediates.noindex/Watchdog.build/Debug-webassembly-wasm32/Watchdog-t.build/Objects-normal/wasm32/Modules/Watchdog.swiftmodule
error: Build failed
BUILD FAILURE 6.4 wasm