swift-css-parser – Build Information

Build Information

Failed to build swift-css-parser, reference main (2fab1e), with Swift 6.4 for Wasm on 18 Sep 2026 06:42:15 UTC.

Build Command

bash -c docker run --pull=always --rm -v "checkouts-53886770-0":/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/stackotter/swift-css-parser.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/stackotter/swift-css-parser
 * branch            main       -> FETCH_HEAD
 * [new branch]      main       -> origin/main
HEAD is now at 2fab1e8 Add example to readme (closes #2)
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 @):
2fab1e835b78ff82de4a8f6f9119be3b52231b08
SUCCESS checkout https://github.com/stackotter/swift-css-parser.git at main
========================================
Build
========================================
Selected platform:         wasm
Swift version:             6.4
Building package at path:  $PWD
https://github.com/stackotter/swift-css-parser.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-53886770-0":/host -w "$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]
[24 / 37] CSSParser
[33 / 47] SwiftCSSParser
[34 / 47] SwiftCSSParser
[35 / 47] SwiftCSSParser
[36 / 47] SwiftCSSParser
[38 / 47] SwiftCSSParser
[43 / 47] SwiftCSSParser-product
[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 0x00006105ca861d98 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/usr/bin/swift-frontend+0x8bb1d98)
 #1 0x00006105ca85f585 llvm::sys::RunSignalHandlers() (/usr/bin/swift-frontend+0x8baf585)
 #2 0x00006105ca862b41 SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
 #3 0x00007907c0e41520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x00007907c0e959bc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969bc)
 #5 0x00007907c0e41476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #6 0x00007907c0e277f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #7 0x00006105c2a671ab swift::DiagnosticHelper::Implementation::diagnoseFatalError(char const*, bool) crtstuff.c:0:0
 #8 0x00006105ca7ae466 llvm::report_fatal_error(llvm::Twine const&, bool) (/usr/bin/swift-frontend+0x8afe466)
 #9 0x00006105c5a169ac (/usr/bin/swift-frontend+0x3d669ac)
#10 0x00006105ca4df3cc llvm::legacy::PassManagerImpl::run(llvm::Module&) (/usr/bin/swift-frontend+0x882f3cc)
#11 0x00006105c2bc21d1 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 0x00006105c2bc140b 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 0x00006105c26d076d generateCode(swift::CompilerInstance&, llvm::StringRef, llvm::Module*, llvm::GlobalVariable*) FrontendTool.cpp:0:0
#14 0x00006105c26c8961 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 0x00006105c26c6c4f swift::performCompileStepsPostSema(swift::CompilerInstance&, int&, swift::FrontendObserver*, llvm::ArrayRef<char const*>) (/usr/bin/swift-frontend+0xa16c4f)
#16 0x00006105c26defda withSemanticAnalysis(swift::CompilerInstance&, swift::FrontendObserver*, llvm::function_ref<bool (swift::CompilerInstance&)>, bool) FrontendTool.cpp:0:0
#17 0x00006105c26ccaa9 performCompile(swift::CompilerInstance&, int&, swift::FrontendObserver*, llvm::ArrayRef<char const*>) FrontendTool.cpp:0:0
#18 0x00006105c26c96ee swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) (/usr/bin/swift-frontend+0xa196ee)
#19 0x00006105c23e1ba8 swift::mainEntry(int, char const**) (/usr/bin/swift-frontend+0x731ba8)
#20 0x00007907c0e28d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#21 0x00007907c0e28e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#22 0x00006105c23e0a65 _start (/usr/bin/swift-frontend+0x730a65)
*** Signal 6: Backtracing from 0x7907c0f1d9dd... done ***
*** Program crashed: Aborted at 0x00007907c0f1d9dd ***
Platform: x86_64 Linux (Ubuntu 22.04.5 LTS)
Thread 0 "swift-frontend" crashed:
0  0x00007907c0f1d9dd <unknown> in libc.so.6
Registers:
rax 0x0000000000000000  0
rdx 0x0000000000000006  6
rcx 0x00007907c0f1d9dd  48 3d 01 f0 ff ff 73 01 c3 48 8b 0d 23 b4 0f 00  H=·ðÿÿs·ÃH··#´··
rbx 0x0000000000000006  6
rsi 0x0000000000000093  147
rdi 0x0000000000000093  147
rbp 0x0000000000000093  147
rsp 0x00006105d0450068  6b 2b 86 ca 05 61 00 00 f0 02 45 d0 05 61 00 00  k+·Ê·a··ð·EÐ·a··
 r8 0x00006105d04502f0  06 00 00 00 00 00 00 00 fa ff ff ff 00 00 00 00  ········úÿÿÿ····
 r9 0x00006105d04502f0  06 00 00 00 00 00 00 00 fa ff ff ff 00 00 00 00  ········úÿÿÿ····
r10 0x00006105d04502f0  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 0x00006105d0450078  01 03 01 00 00 00 00 00 02 63 62 01 00 00 00 00  ·········cb·····
rip 0x00007907c0f1d9dd  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):
0x00007907c0dff000–0x00007907c0fbb401 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