Swift Package IndexBuild Information
Failed to build RoundtripGenerator, reference main (3485f0), with Swift 6.4 for Wasm on 13 Oct 2026 19:12:06 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-6.4.0-RELEASE_wasm 2>&1Build Log
========================================
RunAll
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Builder version: 5.1.2
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/modern-swift-dev/roundtrip-generator.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/modern-swift-dev/roundtrip-generator
* branch main -> FETCH_HEAD
* [new branch] main -> origin/main
HEAD is now at 3485f0c docs(context): define Express, Bun, and reference backend targets
Cloned https://github.com/modern-swift-dev/roundtrip-generator.git
Revision (git rev-parse @):
3485f0cbe060f26d6e7b884f4689e8e1462c6339
SUCCESS checkout https://github.com/modern-swift-dev/roundtrip-generator.git at main
========================================
Build
========================================
Selected platform: wasm
Swift version: 6.4
Building package at path: $PWD
https://github.com/modern-swift-dev/roundtrip-generator.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-54344847-0":/host -w "$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-6.4.0-RELEASE_wasm 2>&1
wasm-6.4-latest: Pulling from saguaro1/spi-images
Digest: sha256:d8610b27563fbed4643ddaec8e9397319e3b3e1372fc54686db2dacb952c1b8f
Status: Image is up to date for registry.gitlab.com/saguaro1/spi-images:wasm-6.4-latest
Fetching https://github.com/swiftlang/swift-syntax.git
Fetching https://github.com/swiftlang/swift-docc-plugin
[1/2345] Fetching swift-docc-plugin
[2346/82845] Fetching swift-docc-plugin, swift-syntax
Fetched https://github.com/swiftlang/swift-docc-plugin (4.41s)
Fetched https://github.com/swiftlang/swift-syntax.git (4.43s)
Computing version for https://github.com/swiftlang/swift-docc-plugin
Computed https://github.com/swiftlang/swift-docc-plugin at 1.5.0 (5.34s)
Fetching https://github.com/swiftlang/swift-docc-symbolkit
[1/3837] Fetching swift-docc-symbolkit
Fetched https://github.com/swiftlang/swift-docc-symbolkit (0.65s)
Computing version for https://github.com/swiftlang/swift-syntax.git
Computed https://github.com/swiftlang/swift-syntax.git at 603.0.2 (0.92s)
Computing version for https://github.com/swiftlang/swift-docc-symbolkit
Computed https://github.com/swiftlang/swift-docc-symbolkit at 1.0.0 (0.19s)
Creating working copy for https://github.com/swiftlang/swift-syntax.git
Working copy of https://github.com/swiftlang/swift-syntax.git resolved at 603.0.2
Creating working copy for https://github.com/swiftlang/swift-docc-plugin
Working copy of https://github.com/swiftlang/swift-docc-plugin resolved at 1.5.0
Creating working copy for https://github.com/swiftlang/swift-docc-symbolkit
Working copy of https://github.com/swiftlang/swift-docc-symbolkit resolved at 1.0.0
Downloading package prebuilt https://download.swift.org/prebuilts/swift-syntax/603.0.2/swift-6.4.0-RELEASE-ubuntu_noble_x86_64-MacroSupport.tar.gz
Downloaded https://download.swift.org/prebuilts/swift-syntax/603.0.2/swift-6.4.0-RELEASE-ubuntu_noble_x86_64-MacroSupport.tar.gz (0.17s)
Building for debugging...
[Computing dependencies]
[Pre-planning 1 / 969]
[Planning deferred tasks]
[148 / 325] SwiftSyntax509
[166 / 325] GeneratorBuilder
[191 / 325] SwiftSyntax
[199 / 327] GeneratorBuilder
[201 / 328] SwiftSyntax601
[212 / 331] SwiftSyntax509
[217 / 342] GeneratorModels
error: SwiftCompile normal wasm32 /host/spi-builder-workspace/Sources/GeneratorBuilder/Node.swift failed with a nonzero exit code. Command line: cd /host
builtin-SwiftPerFileCompile Node.swift
/host/spi-builder-workspace/Sources/GeneratorBuilder/Node.swift:22:46: [1;31merror: [1;39m'atomic' is unavailable: atomic writing is unavailable in WASI because temporary files are not supported[0;0m
[0;36m20 |[0;0m func write(to file: URL) throws {
[0;36m21 |[0;0m let data = toString().data(using: .utf8)
[0;36m22 |[0;0m try data?.write(to: file, options: [.[4;39matomic[0;0m])
[0;36m|[0;0m `- [1;31merror: [1;39m'atomic' is unavailable: atomic writing is unavailable in WASI because temporary files are not supported[0;0m
[0;36m23 |[0;0m }
[0;36m24 |[0;0m
FoundationEssentials.Data.WritingOptions.atomic:4:23: [1;39mnote: [1;39m'atomic' has been explicitly marked unavailable here[0;0m
[0;36m2 |[0;0m struct WritingOptions {
[0;36m3 |[0;0m @available(*, unavailable, message: "atomic writing is unavailable in WASI because temporary files are not supported")
[0;36m4 |[0;0m public static let atomic: Data.WritingOptions }
[0;36m|[0;0m `- [1;39mnote: [1;39m'atomic' has been explicitly marked unavailable here[0;0m
[0;36m5 |[0;0m }
[0;36m6 |[0;0m
Failed frontend command:
/usr/bin/swift-frontend -frontend -c /host/spi-builder-workspace/Sources/GeneratorBuilder/Extensions/FileManagerExtensions.swift /host/spi-builder-workspace/Sources/GeneratorBuilder/Extensions/FixedWidthIntegerExtensions.swift /host/spi-builder-workspace/Sources/GeneratorBuilder/Extensions/SequenceExtensions.swift /host/spi-builder-workspace/Sources/GeneratorBuilder/Extensions/StringExtensions.swift /host/spi-builder-workspace/Sources/GeneratorBuilder/Node+Predefined.swift -primary-file /host/spi-builder-workspace/Sources/GeneratorBuilder/Node.swift /host/spi-builder-workspace/Sources/GeneratorBuilder/NodeBuilder.swift -emit-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/RoundtripGenerator.build/Debug-webassembly-wasm32/GeneratorBuilder-t.build/Objects-normal/wasm32/Node.d -emit-const-values-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/RoundtripGenerator.build/Debug-webassembly-wasm32/GeneratorBuilder-t.build/Objects-normal/wasm32/Node.swiftconstvalues -emit-reference-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/RoundtripGenerator.build/Debug-webassembly-wasm32/GeneratorBuilder-t.build/Objects-normal/wasm32/Node.swiftdeps -serialize-diagnostics-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/RoundtripGenerator.build/Debug-webassembly-wasm32/GeneratorBuilder-t.build/Objects-normal/wasm32/Node.dia -target wasm32-unknown-wasip1 -disable-objc-interop -sdk /root/.swiftpm/swift-sdks/swift-6.4.0-RELEASE_wasm.artifactbundle/swift-6.4.0-RELEASE_wasm/wasm32-unknown-wasip1/WASI.sdk -sysroot /root/.swiftpm/swift-sdks/swift-6.4.0-RELEASE_wasm.artifactbundle/swift-6.4.0-RELEASE_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 6 -Onone -D SWIFT_PACKAGE -D DEBUG -D SWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -D Xcode -serialize-debugging-options -enable-experimental-feature StrictConcurrency -enable-upcoming-feature MemberImportVisibility -enable-upcoming-feature ExistentialAny -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-6.4.0-RELEASE_wasm.artifactbundle/swift-6.4.0-RELEASE_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-6.4.0-RELEASE_wasm.artifactbundle/swift-6.4.0-RELEASE_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/RoundtripGenerator.build/Debug-webassembly-wasm32/GeneratorBuilder-t.build/DerivedSources-normal/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/RoundtripGenerator.build/Debug-webassembly-wasm32/GeneratorBuilder-t.build/DerivedSources/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/RoundtripGenerator.build/Debug-webassembly-wasm32/GeneratorBuilder-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name GeneratorBuilder -package-name spi_builder_workspace -const-gather-protocols-file /host/spi-builder-workspace/.build/out/Intermediates.noindex/RoundtripGenerator.build/Debug-webassembly-wasm32/GeneratorBuilder-t.build/Objects-normal/wasm32/GeneratorBuilder_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 -parse-as-library -o /host/spi-builder-workspace/.build/out/Intermediates.noindex/RoundtripGenerator.build/Debug-webassembly-wasm32/GeneratorBuilder-t.build/Objects-normal/wasm32/Node.o -index-unit-output-path /RoundtripGenerator.build/Debug-webassembly-wasm32/GeneratorBuilder-t.build/Objects-normal/wasm32/Node.o -index-store-path /host/spi-builder-workspace/.build/out -index-system-modules
error: Build failed
BUILD FAILURE 6.4 wasm