Swift Package IndexBuild Information
Failed to build swift-css-parser, reference main (2fab1e), with Swift 6.3 for Wasm on 12 Apr 2026 23:04:34 UTC.
Build Command
bash -c docker run --pull=always --rm -v "checkouts-4609320-3":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.3-latest swift build --swift-sdk swift-6.3-RELEASE_wasm 2>&1Build Log
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RunAll
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Builder version: 4.70.0
Interrupt handler set up.
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Checkout
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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
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Build
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Selected platform: wasm
Swift version: 6.3
Building package at path: $PWD
https://github.com/stackotter/swift-css-parser.git
Running build ...
bash -c docker run --pull=always --rm -v "checkouts-4609320-3":/host -w "$PWD" -e JAVA_HOME="/root/.sdkman/candidates/java/current" -e SPI_BUILD="1" -e SPI_PROCESSING="1" registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.3-latest swift build --swift-sdk swift-6.3-RELEASE_wasm 2>&1
wasm-6.3-latest: Pulling from swiftpackageindex/spi-images
Digest: sha256:d69f4e7582c319245442d62a08b2d7c7fd5a0c0c69f5d2ef11d1530cd8d3329b
Status: Image is up to date for registry.gitlab.com/swiftpackageindex/spi-images:wasm-6.3-latest
Building for debugging...
[0/6] Write sources
[1/6] Compiling CSSParser CSSProperties.cpp
[2/6] Write swift-version-24593BA9C3E375BF.txt
[3/6] Compiling CCSSParser CCSSParser.cpp
[4/6] Compiling CSSParser CSSUtils.cpp
[5/16] Compiling CSSParser CSSParser.cpp
[7/16] Emitting module SwiftCSSParser
[8/17] Compiling SwiftCSSParser RuleSet.swift
[9/17] Compiling SwiftCSSParser TokenType.swift
[10/17] Compiling SwiftCSSParser String.swift
[11/17] Compiling SwiftCSSParser IndentationStyle.swift
[12/17] Compiling SwiftCSSParser Token.swift
[13/17] Compiling SwiftCSSParser AtBlock.swift
[14/17] Compiling SwiftCSSParser Declaration.swift
[15/17] Compiling SwiftCSSParser ParsingError.swift
[16/17] Compiling SwiftCSSParser Statement.swift
error: compile command failed due to signal 6 (use -v to see invocation)
<unknown>:0: error: fatal error encountered during compilation; please submit a bug report (https://swift.org/contributing/#reporting-bugs)
<unknown>:0: note: Functions with 'no-prototype' attribute must take varargs: css_parser_create
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/wasm32-unknown-wasip1/debug/SwiftCSSParser.build/Stylesheet.d -emit-reference-dependencies-path /host/spi-builder-workspace/.build/wasm32-unknown-wasip1/debug/SwiftCSSParser.build/Stylesheet.swiftdeps -serialize-diagnostics-path /host/spi-builder-workspace/.build/wasm32-unknown-wasip1/debug/SwiftCSSParser.build/Stylesheet.dia -target wasm32-unknown-wasip1 -disable-objc-interop -sdk /root/.swiftpm/swift-sdks/swift-6.3-RELEASE_wasm.artifactbundle/swift-6.3-RELEASE_wasm/wasm32-unknown-wasip1/WASI.sdk -I /host/spi-builder-workspace/.build/wasm32-unknown-wasip1/debug/Modules -no-color-diagnostics -Xcc -fno-color-diagnostics -enable-testing -g -debug-info-format=dwarf -dwarf-version=4 -module-cache-path /host/spi-builder-workspace/.build/wasm32-unknown-wasip1/debug/ModuleCache -swift-version 5 -Onone -D SWIFT_PACKAGE -D DEBUG -D SWIFT_MODULE_RESOURCE_BUNDLE_UNAVAILABLE -empty-abi-descriptor -resource-dir /root/.swiftpm/swift-sdks/swift-6.3-RELEASE_wasm.artifactbundle/swift-6.3-RELEASE_wasm/wasm32-unknown-wasip1/swift.xctoolchain/usr/lib/swift_static -use-static-resource-dir -enable-anonymous-context-mangled-names -file-compilation-dir /host/spi-builder-workspace -Xcc -fmodule-map-file=/host/spi-builder-workspace/.build/wasm32-unknown-wasip1/debug/CCSSParser.build/module.modulemap -Xcc -I -Xcc /host/spi-builder-workspace/Sources/CCSSParser -Xcc -fmodule-map-file=/host/spi-builder-workspace/.build/wasm32-unknown-wasip1/debug/CSSParser.build/module.modulemap -Xcc -I -Xcc /host/spi-builder-workspace/cssparser/cssparser -Xcc --sysroot -Xcc /root/.swiftpm/swift-sdks/swift-6.3-RELEASE_wasm.artifactbundle/swift-6.3-RELEASE_wasm/wasm32-unknown-wasip1/WASI.sdk -Xcc -g -no-auto-bridging-header-chaining -module-name SwiftCSSParser -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/wasm32-unknown-wasip1/debug/SwiftCSSParser.build/Stylesheet.swift.o -index-store-path /host/spi-builder-workspace/.build/wasm32-unknown-wasip1/debug/index/store -index-system-modules
1. Swift version 6.3 (swift-6.3-RELEASE)
2. Compiling with effective version 5.10
3. Running pass 'Add prototypes to prototypes-less functions' on module '/host/spi-builder-workspace/.build/wasm32-unknown-wasip1/debug/SwiftCSSParser.build/Stylesheet.swift.o'.
#0 0x000055a7d91788b8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/usr/bin/swift-frontend+0x72e18b8)
#1 0x000055a7d91763a5 llvm::sys::RunSignalHandlers() (/usr/bin/swift-frontend+0x72df3a5)
#2 0x000055a7d9179601 SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
#3 0x00007fca66896520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#4 0x00007fca668ea9fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#5 0x00007fca66896476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#6 0x00007fca6687c7f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#7 0x000055a7d2ad562f (/usr/bin/swift-frontend+0xc3e62f)
#8 0x000055a7d90d41e6 llvm::report_fatal_error(llvm::Twine const&, bool) (/usr/bin/swift-frontend+0x723d1e6)
#9 0x000055a7d51dfe9c (anonymous namespace)::WebAssemblyAddMissingPrototypes::runOnModule(llvm::Module&) WebAssemblyAddMissingPrototypes.cpp:0:0
#10 0x000055a7d8e611ab llvm::legacy::PassManagerImpl::run(llvm::Module&) (/usr/bin/swift-frontend+0x6fca1ab)
#11 0x000055a7d2c2ec79 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+0xd97c79)
#12 0x000055a7d2c2e515 swift::performLLVM(swift::IRGenOptions const&, swift::DiagnosticEngine&, llvm::sys::SmartMutex<false>*, llvm::GlobalVariable*, llvm::Module*, llvm::TargetMachine*, llvm::StringRef, llvm::vfs::OutputBackend&, swift::UnifiedStatsReporter*) (/usr/bin/swift-frontend+0xd97515)
#13 0x000055a7d27fd1bd generateCode(swift::CompilerInstance&, llvm::StringRef, llvm::Module*, llvm::GlobalVariable*) FrontendTool.cpp:0:0
#14 0x000055a7d27f6644 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*>) FrontendTool.cpp:0:0
#15 0x000055a7d27f4e86 swift::performCompileStepsPostSema(swift::CompilerInstance&, int&, swift::FrontendObserver*, llvm::ArrayRef<char const*>) (/usr/bin/swift-frontend+0x95de86)
#16 0x000055a7d27f9c97 performCompile(swift::CompilerInstance&, int&, swift::FrontendObserver*, llvm::ArrayRef<char const*>) FrontendTool.cpp:0:0
#17 0x000055a7d27f72cf swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) (/usr/bin/swift-frontend+0x9602cf)
#18 0x000055a7d256dad1 swift::mainEntry(int, char const**) (/usr/bin/swift-frontend+0x6d6ad1)
#19 0x00007fca6687dd90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#20 0x00007fca6687de40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#21 0x000055a7d256c205 _start (/usr/bin/swift-frontend+0x6d5205)
*** Signal 6: Backtracing from 0x7fca6697290d... done ***
*** Program crashed: Aborted at 0x000000000000006c ***
Platform: x86_64 Linux (Ubuntu 22.04.5 LTS)
Thread 0 "swift-frontend" crashed:
0 0x00007fca6697290d <unknown> in libc.so.6
...
Registers:
rax 0x0000000000000000 0
rdx 0x0000000000000006 6
rcx 0x00007fca6697290d 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d f3 b4 0f 00 H=·ðÿÿs·ÃH··ó´··
rbx 0x0000000000000006 6
rsi 0x000000000000006c 108
rdi 0x000000000000006c 108
rbp 0x000000000000006c 108
rsp 0x000055a7de06a468 2b 96 17 d9 a7 55 00 00 f0 a6 06 de a7 55 00 00 +··Ù§U··ð¦·Þ§U··
r8 0x000055a7de06a6f0 06 00 00 00 00 00 00 00 fa ff ff ff 00 00 00 00 ········úÿÿÿ····
r9 0x000055a7de06a6f0 06 00 00 00 00 00 00 00 fa ff ff ff 00 00 00 00 ········úÿÿÿ····
r10 0x000055a7de06a6f0 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 0x000055a7de06a478 01 08 00 00 00 00 00 00 94 ad d4 01 00 00 00 00 ·········Ô·····
rip 0x00007fca6697290d 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d f3 b4 0f 00 H=·ðÿÿs·ÃH··ó´··
rflags 0x0000000000000246 ZF PF
cs 0x0033 fs 0x0000 gs 0x0000
Images (26 omitted):
0x00007fca66854000–0x00007fca66a10401 095c7ba148aeca81668091f718047078d57efddb libc.so.6 /usr/lib/x86_64-linux-gnu/libc.so.6
Backtrace took 0.00s
BUILD FAILURE 6.3 wasm