Swift Package IndexBuild Information
Failed to build swift-css-parser, reference v0.1.2 (6cf16c), with Swift 6.4 for Wasm on 18 Sep 2026 06:42:16 UTC.
Build Command
bash -c docker run --pull=always --rm -v "checkouts-54344845-0":/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
========================================
RunAll
========================================
Builder version: 5.1.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/stackotter/swift-css-parser.git
Reference: v0.1.2
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/stackotter/swift-css-parser
* tag v0.1.2 -> FETCH_HEAD
HEAD is now at 6cf16c6 Add missing includes to fix compilation on Linux
Submodule path 'cssparser': checked out '0675c7ade2d5398bb9981ff32aac469c5171f62b'
Submodule 'cssparser' (https://github.com/Sigil-Ebook/cssparser.git) registered for path 'cssparser'
Cloning into '/host/spi-builder-workspace/cssparser'...
Cloned https://github.com/stackotter/swift-css-parser.git
Revision (git rev-parse @):
6cf16c6696def00a313daef0e29eb27f5c39ece4
SUCCESS checkout https://github.com/stackotter/swift-css-parser.git at v0.1.2
========================================
Build
========================================
Selected platform: wasm
Swift version: 6.4
Building package at path: $PWD
https://github.com/stackotter/swift-css-parser.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-54344845-0":/host -w "$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...
[Pre-planning 1 / 126]
[28 / 38] SwiftCSSParser
[33 / 47] SwiftCSSParser
[35 / 47] SwiftCSSParser
[42 / 47] CCSSParser
[43 / 47] CSSParser
[44 / 47] SwiftCSSParser
<unknown>:0: [1;31merror: [1;39mfatal error encountered during compilation; please submit a bug report (https://swift.org/contributing/#reporting-bugs)[0;0m
<unknown>:0: [1;39mnote: [1;39mFunctions with 'no-prototype' attribute must take varargs: css_parser_create[0;0m
Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the crash backtrace.
Stack dump:
0. Program arguments: /usr/bin/swift-frontend -frontend -c /host/spi-builder-workspace/Sources/SwiftCSSParser/AtBlock.swift /host/spi-builder-workspace/Sources/SwiftCSSParser/Declaration.swift /host/spi-builder-workspace/Sources/SwiftCSSParser/Extensions/String.swift /host/spi-builder-workspace/Sources/SwiftCSSParser/IndentationStyle.swift /host/spi-builder-workspace/Sources/SwiftCSSParser/ParsingError.swift /host/spi-builder-workspace/Sources/SwiftCSSParser/RuleSet.swift /host/spi-builder-workspace/Sources/SwiftCSSParser/Statement.swift -primary-file /host/spi-builder-workspace/Sources/SwiftCSSParser/Stylesheet.swift /host/spi-builder-workspace/Sources/SwiftCSSParser/Token.swift /host/spi-builder-workspace/Sources/SwiftCSSParser/TokenType.swift -emit-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-css-parser.build/Debug-webassembly-wasm32/SwiftCSSParser-t.build/Objects-normal/wasm32/Stylesheet.d -emit-const-values-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-css-parser.build/Debug-webassembly-wasm32/SwiftCSSParser-t.build/Objects-normal/wasm32/Stylesheet.swiftconstvalues -emit-reference-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-css-parser.build/Debug-webassembly-wasm32/SwiftCSSParser-t.build/Objects-normal/wasm32/Stylesheet.swiftdeps -serialize-diagnostics-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-css-parser.build/Debug-webassembly-wasm32/SwiftCSSParser-t.build/Objects-normal/wasm32/Stylesheet.dia -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 -fmodule-map-file=/host/spi-builder-workspace/.build/out/Intermediates.noindex/GeneratedModuleMaps-webassembly-wasm32/CCSSParser.modulemap -Xcc -fmodule-map-file=/host/spi-builder-workspace/.build/out/Intermediates.noindex/GeneratedModuleMaps-webassembly-wasm32/CSSParser.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/Sources/CCSSParser -Xcc -I/host/spi-builder-workspace/cssparser/cssparser -Xcc -I/host/spi-builder-workspace/.build/out/Products/Debug-webassembly-wasm32/include -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-css-parser.build/Debug-webassembly-wasm32/SwiftCSSParser-t.build/DerivedSources-normal/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-css-parser.build/Debug-webassembly-wasm32/SwiftCSSParser-t.build/DerivedSources/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-css-parser.build/Debug-webassembly-wasm32/SwiftCSSParser-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG=1 -no-auto-bridging-header-chaining -module-name SwiftCSSParser -const-gather-protocols-file /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-css-parser.build/Debug-webassembly-wasm32/SwiftCSSParser-t.build/Objects-normal/wasm32/SwiftCSSParser_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/swift-css-parser.build/Debug-webassembly-wasm32/SwiftCSSParser-t.build/Objects-normal/wasm32/Stylesheet.o -index-unit-output-path /swift-css-parser.build/Debug-webassembly-wasm32/SwiftCSSParser-t.build/Objects-normal/wasm32/Stylesheet.o -index-store-path /host/spi-builder-workspace/.build/out -index-system-modules
1. Swift version 6.4.2-dev (LLVM 15622a86b1749a9, Swift d2e983b81b18217)
2. Compiling with effective version 5.10
3. Running pass 'Add prototypes to prototypes-less functions' on module '/host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-css-parser.build/Debug-webassembly-wasm32/SwiftCSSParser-t.build/Objects-normal/wasm32/Stylesheet.o'.
#0 0x00005b777cbaed98 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/usr/bin/swift-frontend+0x8bb1d98)
#1 0x00005b777cbac585 llvm::sys::RunSignalHandlers() (/usr/bin/swift-frontend+0x8baf585)
#2 0x00005b777cbafb41 SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
#3 0x000070afac60d520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#4 0x000070afac6619bc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969bc)
#5 0x000070afac60d476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#6 0x000070afac5f37f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#7 0x00005b7774db41ab swift::DiagnosticHelper::Implementation::diagnoseFatalError(char const*, bool) crtstuff.c:0:0
#8 0x00005b777cafb466 llvm::report_fatal_error(llvm::Twine const&, bool) (/usr/bin/swift-frontend+0x8afe466)
#9 0x00005b7777d639ac (/usr/bin/swift-frontend+0x3d669ac)
#10 0x00005b777c82c3cc llvm::legacy::PassManagerImpl::run(llvm::Module&) (/usr/bin/swift-frontend+0x882f3cc)
#11 0x00005b7774f0f1d1 swift::compileAndWriteLLVM(llvm::Module*, llvm::TargetMachine*, swift::IRGenOptions const&, swift::UnifiedStatsReporter*, swift::DiagnosticEngine&, llvm::raw_pwrite_stream&, llvm::sys::SmartMutex<false>*, llvm::raw_pwrite_stream*) (/usr/bin/swift-frontend+0xf121d1)
#12 0x00005b7774f0e40b swift::performLLVM(swift::IRGenOptions const&, swift::DiagnosticEngine&, llvm::sys::SmartMutex<false>*, llvm::GlobalVariable*, llvm::Module*, llvm::TargetMachine*, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>, llvm::StringRef, llvm::vfs::OutputBackend&, swift::UnifiedStatsReporter*) (/usr/bin/swift-frontend+0xf1140b)
#13 0x00005b7774a1d76d generateCode(swift::CompilerInstance&, llvm::StringRef, llvm::Module*, llvm::GlobalVariable*) FrontendTool.cpp:0:0
#14 0x00005b7774a15961 performCompileStepsPostSILGen(swift::CompilerInstance&, std::unique_ptr<swift::SILModule, std::default_delete<swift::SILModule>>, llvm::PointerUnion<swift::ModuleDecl*, swift::SourceFile*>, swift::PrimarySpecificPaths const&, int&, swift::FrontendObserver*, llvm::ArrayRef<char const*>, llvm::ArrayRef<swift::PrimarySpecificPaths>) FrontendTool.cpp:0:0
#15 0x00005b7774a13c4f swift::performCompileStepsPostSema(swift::CompilerInstance&, int&, swift::FrontendObserver*, llvm::ArrayRef<char const*>) (/usr/bin/swift-frontend+0xa16c4f)
#16 0x00005b7774a2bfda withSemanticAnalysis(swift::CompilerInstance&, swift::FrontendObserver*, llvm::function_ref<bool (swift::CompilerInstance&)>, bool) FrontendTool.cpp:0:0
#17 0x00005b7774a19aa9 performCompile(swift::CompilerInstance&, int&, swift::FrontendObserver*, llvm::ArrayRef<char const*>) FrontendTool.cpp:0:0
#18 0x00005b7774a166ee swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) (/usr/bin/swift-frontend+0xa196ee)
#19 0x00005b777472eba8 swift::mainEntry(int, char const**) (/usr/bin/swift-frontend+0x731ba8)
#20 0x000070afac5f4d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#21 0x000070afac5f4e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#22 0x00005b777472da65 _start (/usr/bin/swift-frontend+0x730a65)
*** Signal 6: Backtracing from 0x70afac6e99dd... done ***
*** Program crashed: Aborted at 0x000070afac6e99dd ***
Platform: x86_64 Linux (Ubuntu 22.04.5 LTS)
Thread 0 "swift-frontend" crashed:
0 0x000070afac6e99dd <unknown> in libc.so.6
Registers:
rax 0x0000000000000000 0
rdx 0x0000000000000006 6
rcx 0x000070afac6e99dd 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d 23 b4 0f 00 H=·ðÿÿs·ÃH··#´··
rbx 0x0000000000000006 6
rsi 0x0000000000000074 116
rdi 0x0000000000000074 116
rbp 0x0000000000000074 116
rsp 0x00005b7797ea9068 6b fb ba 7c 77 5b 00 00 f0 92 ea 97 77 5b 00 00 kûº|w[··ð·ê·w[··
r8 0x00005b7797ea92f0 06 00 00 00 00 00 00 00 fa ff ff ff 00 00 00 00 ········úÿÿÿ····
r9 0x00005b7797ea92f0 06 00 00 00 00 00 00 00 fa ff ff ff 00 00 00 00 ········úÿÿÿ····
r10 0x00005b7797ea92f0 06 00 00 00 00 00 00 00 fa ff ff ff 00 00 00 00 ········úÿÿÿ····
r11 0x0000000000000246 582
r12 0x0000000000000000 0
r13 0x0000000000000000 0
r14 0x0000000000000000 0
r15 0x00005b7797ea9078 01 03 01 00 00 00 00 00 34 01 cd 00 00 00 00 00 ········4·Í·····
rip 0x000070afac6e99dd 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d 23 b4 0f 00 H=·ðÿÿs·ÃH··#´··
rflags 0x0000000000000246 ZF PF
cs 0x0033 fs 0x0000 gs 0x0000
Images (41 omitted):
0x000070afac5cb000–0x000070afac787401 6a6cb5a80fd5e5bb5bf3aeaa111add98e88843a5 libc.so.6 /usr/lib/x86_64-linux-gnu/libc.so.6
Backtrace took 0.00s
Failed frontend command:
/usr/bin/swift-frontend -frontend -c /host/spi-builder-workspace/Sources/SwiftCSSParser/AtBlock.swift /host/spi-builder-workspace/Sources/SwiftCSSParser/Declaration.swift /host/spi-builder-workspace/Sources/SwiftCSSParser/Extensions/String.swift /host/spi-builder-workspace/Sources/SwiftCSSParser/IndentationStyle.swift /host/spi-builder-workspace/Sources/SwiftCSSParser/ParsingError.swift /host/spi-builder-workspace/Sources/SwiftCSSParser/RuleSet.swift /host/spi-builder-workspace/Sources/SwiftCSSParser/Statement.swift -primary-file /host/spi-builder-workspace/Sources/SwiftCSSParser/Stylesheet.swift /host/spi-builder-workspace/Sources/SwiftCSSParser/Token.swift /host/spi-builder-workspace/Sources/SwiftCSSParser/TokenType.swift -emit-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-css-parser.build/Debug-webassembly-wasm32/SwiftCSSParser-t.build/Objects-normal/wasm32/Stylesheet.d -emit-const-values-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-css-parser.build/Debug-webassembly-wasm32/SwiftCSSParser-t.build/Objects-normal/wasm32/Stylesheet.swiftconstvalues -emit-reference-dependencies-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-css-parser.build/Debug-webassembly-wasm32/SwiftCSSParser-t.build/Objects-normal/wasm32/Stylesheet.swiftdeps -serialize-diagnostics-path /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-css-parser.build/Debug-webassembly-wasm32/SwiftCSSParser-t.build/Objects-normal/wasm32/Stylesheet.dia -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 -fmodule-map-file\=/host/spi-builder-workspace/.build/out/Intermediates.noindex/GeneratedModuleMaps-webassembly-wasm32/CCSSParser.modulemap -Xcc -fmodule-map-file\=/host/spi-builder-workspace/.build/out/Intermediates.noindex/GeneratedModuleMaps-webassembly-wasm32/CSSParser.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/Sources/CCSSParser -Xcc -I/host/spi-builder-workspace/cssparser/cssparser -Xcc -I/host/spi-builder-workspace/.build/out/Products/Debug-webassembly-wasm32/include -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-css-parser.build/Debug-webassembly-wasm32/SwiftCSSParser-t.build/DerivedSources-normal/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-css-parser.build/Debug-webassembly-wasm32/SwiftCSSParser-t.build/DerivedSources/wasm32 -Xcc -I/host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-css-parser.build/Debug-webassembly-wasm32/SwiftCSSParser-t.build/DerivedSources -Xcc -DSWIFT_PACKAGE -Xcc -DDEBUG\=1 -no-auto-bridging-header-chaining -module-name SwiftCSSParser -const-gather-protocols-file /host/spi-builder-workspace/.build/out/Intermediates.noindex/swift-css-parser.build/Debug-webassembly-wasm32/SwiftCSSParser-t.build/Objects-normal/wasm32/SwiftCSSParser_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/swift-css-parser.build/Debug-webassembly-wasm32/SwiftCSSParser-t.build/Objects-normal/wasm32/Stylesheet.o -index-unit-output-path /swift-css-parser.build/Debug-webassembly-wasm32/SwiftCSSParser-t.build/Objects-normal/wasm32/Stylesheet.o -index-store-path /host/spi-builder-workspace/.build/out -index-system-modules
error: Build failed
BUILD FAILURE 6.4 wasm