Swift Package IndexBuild Information
Failed to build MutantKit, reference v1.3.2 (1e3452), with Swift 6.4 for Wasm on 27 Oct 2026 16:14:03 UTC.
Build Command
bash -c docker run --pull=always --rm -v "checkouts-53886769-0":/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: 5.1.3
Interrupt handler set up.
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Checkout
========================================
Clone URL: https://github.com/juntaki/mutantkit.git
Reference: v1.3.2
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/juntaki/mutantkit
* tag v1.3.2 -> FETCH_HEAD
HEAD is now at 1e34526 Release v1.3.2 (#103)
Cloned https://github.com/juntaki/mutantkit.git
Revision (git rev-parse @):
1e345263e36e1658adeed6ae919b7f5875a2601b
SPI manifest file found: $PWD/.spi.yml
SUCCESS checkout https://github.com/juntaki/mutantkit.git at v1.3.2
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Build
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Selected platform: wasm
Swift version: 6.4
Building package at path: $PWD
https://github.com/juntaki/mutantkit.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-53886769-0":/host -w "$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: sha256:0ad19d16955074ecc72bbe910025b19c4e4614184c1a48afc82660d4c7620121
Status: Image is up to date for registry.gitlab.com/saguaro1/spi-images:wasm-6.4-latest
Fetching https://github.com/apple/swift-argument-parser.git
Fetching https://github.com/jpsim/Yams.git
Fetching https://github.com/swiftlang/swift-syntax.git
[1/11878] Fetching yams
[5703/31191] Fetching yams, swift-argument-parser
Fetched https://github.com/apple/swift-argument-parser.git (1.15s)
Fetched https://github.com/jpsim/Yams.git (1.16s)
[1/81240] Fetching swift-syntax
Fetched https://github.com/swiftlang/swift-syntax.git (3.45s)
Computing version for https://github.com/swiftlang/swift-syntax.git
Computed https://github.com/swiftlang/swift-syntax.git at 604.0.0 (4.43s)
Computing version for https://github.com/jpsim/Yams.git
Computed https://github.com/jpsim/Yams.git at 6.2.2 (0.13s)
Computing version for https://github.com/apple/swift-argument-parser.git
Computed https://github.com/apple/swift-argument-parser.git at 1.8.2 (0.15s)
Creating working copy for https://github.com/apple/swift-argument-parser.git
Working copy of https://github.com/apple/swift-argument-parser.git resolved at 1.8.2
Creating working copy for https://github.com/swiftlang/swift-syntax.git
Working copy of https://github.com/swiftlang/swift-syntax.git resolved at 604.0.0
Creating working copy for https://github.com/jpsim/Yams.git
Working copy of https://github.com/jpsim/Yams.git resolved at 6.2.2
Downloading package prebuilt https://download.swift.org/prebuilts/swift-syntax/604.0.0/swift-6.4.0-RELEASE-ubuntu_noble_x86_64-MacroSupport.tar.gz
Downloaded https://download.swift.org/prebuilts/swift-syntax/604.0.0/swift-6.4.0-RELEASE-ubuntu_noble_x86_64-MacroSupport.tar.gz (0.18s)
warning: 'spi-builder-workspace': found 1 file(s) which are unhandled; explicitly declare them as resources or exclude from the target
/host/spi-builder-workspace/Tests/MutantKitTests/Unit/README-CoreOperatorExpansionRED.md
Building for debugging...
[Computing dependencies]
[Provisioning 1 / 41]
[Pre-planning 1 / 1031]
[Planning deferred tasks]
[164 / 354] Yams
[207 / 365] Yams
[208 / 365] SwiftSyntax603
[218 / 367] SwiftSyntax604
[224 / 369] SwiftSyntax601
[232 / 370] SwiftSyntax601
[248 / 385] ArgumentParserToolInfo
error: SwiftCompile normal wasm32 /host/spi-builder-workspace/.build/checkouts/Yams/Sources/Yams/Representer.swift failed with a nonzero exit code. Command line: cd /host
builtin-SwiftPerFileCompile Representer.swift
/host/spi-builder-workspace/.build/checkouts/Yams/Sources/Yams/Representer.swift:342:45: [1;31merror: [1;39mcannot find 'DBL_DECIMAL_DIG' in scope[0;0m
[0;36m340 |[0;0m // Since `NumberFormatter` creates a string with insufficient precision for Decode,
[0;36m341 |[0;0m // it uses with `String(format:...)`
[0;36m342 |[0;0m let string = String(format: "%.*g", [4;39mDBL_DECIMAL_DIG[0;0m, self)
[0;36m|[0;0m `- [1;31merror: [1;39mcannot find 'DBL_DECIMAL_DIG' in scope[0;0m
[0;36m343 |[0;0m // "%*.g" does not use scientific notation if the exponent is less than –4.
[0;36m344 |[0;0m // So fallback to using `NumberFormatter` if string does not uses scientific notation.
Failed frontend command:
/usr/bin/swift-frontend -frontend -c /host/spi-builder-workspace/.build/checkouts/Yams/Sources/Yams/AliasDereferencingStrategy.swift /host/spi-builder-workspace/.build/checkouts/Yams/Sources/Yams/Anchor.swift /host/spi-builder-workspace/.build/checkouts/Yams/Sources/Yams/Constructor.swift /host/spi-builder-workspace/.build/checkouts/Yams/Sources/Yams/Decoder.swift /host/spi-builder-workspace/.build/checkouts/Yams/Sources/Yams/Emitter.swift /host/spi-builder-workspace/.build/checkouts/Yams/Sources/Yams/Encoder.swift /host/spi-builder-workspace/.build/checkouts/Yams/Sources/Yams/Mark.swift /host/spi-builder-workspace/.build/checkouts/Yams/Sources/Yams/Node.Alias.swift /host/spi-builder-workspace/.build/checkouts/Yams/Sources/Yams/Node.Mapping.swift /host/spi-builder-workspace/.build/checkouts/Yams/Sources/Yams/Node.Scalar.swift /host/spi-builder-workspace/.build/checkouts/Yams/Sources/Yams/Node.Sequence.swift /host/spi-builder-workspace/.build/checkouts/Yams/Sources/Yams/Node.swift -primary-file /host/spi-builder-workspace/.build/checkouts/Yams/Sources/Yams/Parser.swift -primary-file /host/spi-builder-workspace/.build/checkouts/Yams/Sources/Yams/RedundancyAliasingStrategy.swift -primary-file /host/spi-builder-workspace/.build/checkouts/Yams/Sources/Yams/Representer.swift /host/spi-builder-workspace/.build/checkouts/Yams/Sources/Yams/Resolver.swift /host/spi-builder-workspace/.build/checkouts/Yams/Sources/Yams/String+Yams.swift /host/spi-builder-workspace/.build/checkouts/Yams/Sources/Yams/Tag.swift /host/spi-builder-workspace/.build/checkouts/Yams/Sources/Yams/YamlAnchorProviding.swift /host/spi-builder-workspace/.build/checkouts/Yams/Sources/Yams/YamlError.swift /host/spi-builder-workspace/.build/checkouts/Yams/Sources/Yams/YamlTagProviding.swift -supplementary-output-file-map /host/spi-builder-workspace/.build/out/Intermediates.noindex/Yams.build/Debug-webassembly-wasm32/Yams-t.build/Objects-normal/wasm32/supplementaryOutputs-5 -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 -suppress-warnings -swift-version 6 -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 -user-module-version 6.2.2 -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 -fmodule-map-file\=/host/spi-builder-workspace/.build/checkouts/Yams/Sources/CYaml/include/module.modulemap -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/checkouts/Yams/Sources/CYaml/include -Xcc -I/host/spi-builder-workspace/.build/out/Products/Debug-webassembly-wasm32/include -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/Yams.build/Debug-webassembly-wasm32/Yams-t.build/DerivedSources-normal/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/Yams.build/Debug-webassembly-wasm32/Yams-t.build/DerivedSources/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/Yams.build/Debug-webassembly-wasm32/Yams-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -Xcc -DYAML_DECLARE_STATIC -no-auto-bridging-header-chaining -module-name Yams -package-name yams -const-gather-protocols-file /host/spi-builder-workspace/.build/out/Intermediates.noindex/Yams.build/Debug-webassembly-wasm32/Yams-t.build/Objects-normal/wasm32/Yams_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/Yams.build/Debug-webassembly-wasm32/Yams-t.build/Objects-normal/wasm32/Parser.o -o /host/spi-builder-workspace/.build/out/Intermediates.noindex/Yams.build/Debug-webassembly-wasm32/Yams-t.build/Objects-normal/wasm32/RedundancyAliasingStrategy.o -o /host/spi-builder-workspace/.build/out/Intermediates.noindex/Yams.build/Debug-webassembly-wasm32/Yams-t.build/Objects-normal/wasm32/Representer.o -index-unit-output-path /Yams.build/Debug-webassembly-wasm32/Yams-t.build/Objects-normal/wasm32/Parser.o -index-unit-output-path /Yams.build/Debug-webassembly-wasm32/Yams-t.build/Objects-normal/wasm32/RedundancyAliasingStrategy.o -index-unit-output-path /Yams.build/Debug-webassembly-wasm32/Yams-t.build/Objects-normal/wasm32/Representer.o -index-store-path /host/spi-builder-workspace/.build/out -index-system-modules
error: Build failed
BUILD FAILURE 6.4 wasm