Swift Package IndexBuild Information
Failed to build LazyContainers, reference 4.1.0 (360a35), with Swift 6.4 for Wasm on 18 Sep 2026 10:19:45 UTC.
Build Command
bash -c docker run --pull=always --rm -v "checkouts-54344844-0":/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>&1Build Log
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RunAll
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Builder version: 5.1.0
Interrupt handler set up.
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Checkout
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Clone URL: https://github.com/RougeWare/Swift-Lazy-Containers.git
Reference: 4.1.0
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/RougeWare/Swift-Lazy-Containers
* tag 4.1.0 -> FETCH_HEAD
HEAD is now at 360a35c Merge pull request #37 from RougeWare/feature/Autoconformance
Cloned https://github.com/RougeWare/Swift-Lazy-Containers.git
Revision (git rev-parse @):
360a35c98992fc53739e884fb0c48e988710fa92
SUCCESS checkout https://github.com/RougeWare/Swift-Lazy-Containers.git at 4.1.0
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Build
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Selected platform: wasm
Swift version: 6.4
Building package at path: $PWD
https://github.com/RougeWare/Swift-Lazy-Containers.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-54344844-0":/host -w "$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]
[24 / 33] LazyContainers
error: SwiftCompile normal wasm32 failed with a nonzero exit code. Command line: cd /host
/host/spi-builder-workspace/Sources/LazyContainers/LazyContainers.swift:408:30: [1;33mwarning: [1;39mgeneric parameter 'Value' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode[0;0m
[0;36m345 |[0;0m /// semaphore was added to mitigate this, but again, it hasn't undergone rigorous real-world testing.
[0;36m346 |[0;0m @propertyWrapper
[0;36m347 |[0;0m public struct FunctionalLazy<Value>: LazyContainer {
[0;36m|[0;0m `- [1;39mnote: [1;39m'Value' previously declared here[0;0m
[0;36m348 |[0;0m
[0;36m349 |[0;0m /// Privatizes the inner-workings of this functional lazy container
[0;36m:[0;0m
[0;36m406 |[0;0m /// The actual functionality of `FunctionalLazy`, separated so that the semantics work out better
[0;36m407 |[0;0m @propertyWrapper
[0;36m408 |[0;0m private final class Guts<Value> {
[0;36m|[0;0m `- [1;33mwarning: [1;39mgeneric parameter 'Value' shadows generic parameter from outer scope with the same name; this is an error in the Swift 6 language mode[0;0m
[0;36m409 |[0;0m
[0;36m410 |[0;0m /// The closure called every time a value is needed
/host/spi-builder-workspace/Sources/LazyContainers/LazyContainers.swift:415:24: [1;31merror: [1;39mcannot find type 'DispatchSemaphore' in scope[0;0m
[0;36m413 |[0;0m /// Guarantees that, on first-init, only one thread initializes the value. After that, this is set to `nil`
[0;36m414 |[0;0m /// because subsequent threads can safely access the value without the risk of setting it again.
[0;36m415 |[0;0m var semaphore: [4;39mDispatchSemaphore[0;0m? = .init(value: 1)
[0;36m|[0;0m `- [1;31merror: [1;39mcannot find type 'DispatchSemaphore' in scope[0;0m
[0;36m416 |[0;0m
[0;36m417 |[0;0m
Failed frontend command:
/usr/bin/swift-frontend -frontend -emit-module -experimental-skip-non-inlinable-function-bodies-without-types /host/spi-builder-workspace/Sources/LazyContainers/LazyContainer\ +\ Codable.swift /host/spi-builder-workspace/Sources/LazyContainers/LazyContainer\ +\ Equatable.swift /host/spi-builder-workspace/Sources/LazyContainers/LazyContainer\ +\ Hashable.swift /host/spi-builder-workspace/Sources/LazyContainers/LazyContainers.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/LazyContainers.build/Debug-webassembly-wasm32/LazyContainers-t.build/DerivedSources-normal/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/LazyContainers.build/Debug-webassembly-wasm32/LazyContainers-t.build/DerivedSources/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/LazyContainers.build/Debug-webassembly-wasm32/LazyContainers-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name LazyContainers -const-gather-protocols-file /host/spi-builder-workspace/.build/out/Intermediates.noindex/LazyContainers.build/Debug-webassembly-wasm32/LazyContainers-t.build/Objects-normal/wasm32/LazyContainers_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/LazyContainers.build/Debug-webassembly-wasm32/LazyContainers-t.build/Objects-normal/wasm32/Modules/LazyContainers.swiftdoc -emit-module-source-info-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/LazyContainers.build/Debug-webassembly-wasm32/LazyContainers-t.build/Objects-normal/wasm32/Modules/LazyContainers.swiftsourceinfo -emit-objc-header-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/LazyContainers.build/Debug-webassembly-wasm32/LazyContainers-t.build/Objects-normal/wasm32/LazyContainers-Swift.h -serialize-diagnostics-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/LazyContainers.build/Debug-webassembly-wasm32/LazyContainers-t.build/Objects-normal/wasm32/LazyContainers-primary-emit-module.dia -emit-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/LazyContainers.build/Debug-webassembly-wasm32/LazyContainers-t.build/Objects-normal/wasm32/LazyContainers-primary-emit-module.d -parse-as-library -o /host/spi-builder-workspace/.build/out/Intermediates.noindex/LazyContainers.build/Debug-webassembly-wasm32/LazyContainers-t.build/Objects-normal/wasm32/Modules/LazyContainers.swiftmodule
error: Build failed
BUILD FAILURE 6.4 wasm