[llvm] [RISCV][llvm] Support BUILD_VECTOR codegen for P extension (PR #169083)

LLVM Continuous Integration via llvm-commits llvm-commits at lists.llvm.org
Tue Nov 25 19:58:25 PST 2025 

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `sanitizer-aarch64-linux-bootstrap-msan` running on `sanitizer-buildbot10` while building `llvm` at step 2 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/94/builds/13046

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 2 (annotate) failure: 'python ../sanitizer_buildbot/sanitizers/zorg/buildbot/builders/sanitizers/buildbot_selector.py' (failure)
...
[3174/5680] Building CXX object lib/Target/VE/MCTargetDesc/CMakeFiles/LLVMVEDesc.dir/VEMCCodeEmitter.cpp.o
[3175/5680] Building CXX object lib/Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64MCTargetDesc.cpp.o
[3176/5680] Building CXX object lib/Target/X86/MCTargetDesc/CMakeFiles/LLVMX86Desc.dir/X86AsmBackend.cpp.o
[3177/5680] Building CXX object lib/CodeGen/AsmPrinter/CMakeFiles/LLVMAsmPrinter.dir/DwarfDebug.cpp.o
[3178/5680] Building CXX object lib/Target/SPIRV/Analysis/CMakeFiles/LLVMSPIRVAnalysis.dir/SPIRVConvergenceRegionAnalysis.cpp.o
[3179/5680] Building CXX object lib/LTO/CMakeFiles/LLVMLTO.dir/ThinLTOCodeGenerator.cpp.o
[3180/5680] Building CXX object lib/Target/NVPTX/MCTargetDesc/CMakeFiles/LLVMNVPTXDesc.dir/NVPTXInstPrinter.cpp.o
[3181/5680] Building CXX object tools/clang/lib/InstallAPI/CMakeFiles/obj.clangInstallAPI.dir/FileList.cpp.o
[3182/5680] Building CXX object tools/clang/lib/InstallAPI/CMakeFiles/obj.clangInstallAPI.dir/DylibVerifier.cpp.o
[3183/5680] Building CXX object tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/DebugContainerModeling.cpp.o
FAILED: tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/DebugContainerModeling.cpp.o 
/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/clang++ -DCLANG_EXPORTS -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GLIBCXX_USE_CXX11_ABI=1 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build2_msan/tools/clang/lib/StaticAnalyzer/Checkers -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/StaticAnalyzer/Checkers -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/include -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build2_msan/tools/clang/include -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build2_msan/include -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -fno-common -Woverloaded-virtual -Wno-nested-anon-types -O3 -DNDEBUG -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/DebugContainerModeling.cpp.o -MF tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/DebugContainerModeling.cpp.o.d -o tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/DebugContainerModeling.cpp.o -c /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/StaticAnalyzer/Checkers/DebugContainerModeling.cpp
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/clang++ -DCLANG_EXPORTS -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GLIBCXX_USE_CXX11_ABI=1 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build2_msan/tools/clang/lib/StaticAnalyzer/Checkers -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/StaticAnalyzer/Checkers -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/include -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build2_msan/tools/clang/include -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build2_msan/include -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -fno-common -Woverloaded-virtual -Wno-nested-anon-types -O3 -DNDEBUG -std=c++17 -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/DebugContainerModeling.cpp.o -MF tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/DebugContainerModeling.cpp.o.d -o tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/DebugContainerModeling.cpp.o -c /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/StaticAnalyzer/Checkers/DebugContainerModeling.cpp
1.	/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/include/clang/Lex/PPCallbacks.h:429:42: current parser token ','
2.	/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/include/clang/Lex/PPCallbacks.h:25:1: parsing namespace 'clang'
3.	/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/include/clang/Lex/PPCallbacks.h:37:1: parsing struct/union/class body 'clang::PPCallbacks'
 #0 0x0000ae84e4ae638c ___interceptor_backtrace /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/../sanitizer_common/sanitizer_common_interceptors.inc:4556:13
 #1 0x0000ae84eb7bdd04 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support/Unix/Signals.inc:838:7
 #2 0x0000ae84eb7b82f0 llvm::sys::RunSignalHandlers() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support/Signals.cpp:105:18
 #3 0x0000ae84eb63b9a8 HandleCrash /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:73:5
 #4 0x0000ae84eb63b9a8 CrashRecoverySignalHandler(int) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:390:51
 #5 0x0000ae84e4b18298 ~ScopedThreadLocalStateBackup /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/msan.h:353:37
 #6 0x0000ae84e4b18298 SignalHandler(int) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/msan_interceptors.cpp:1154:1
 #7 0x0000f0000c8ea9c0 (linux-vdso.so.1+0x9c0)
 #8 0x0000f0000c3a7294 (/lib/aarch64-linux-gnu/libc.so.6+0xa7294)
 #9 0x0000ae84e4abbb40 MsanAllocate(__sanitizer::BufferedStackTrace*, unsigned long, unsigned long, bool) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/msan_allocator.cpp:256:9
#10 0x0000ae84e4abc34c SetErrnoOnNull /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/../sanitizer_common/sanitizer_allocator_checks.h:31:7
#11 0x0000ae84e4abc34c __msan::msan_memalign(unsigned long, unsigned long, __sanitizer::BufferedStackTrace*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/msan_allocator.cpp:432:10
#12 0x0000ae84e4b262a0 operator new(unsigned long, std::align_val_t, std::nothrow_t const&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/msan_new_delete.cpp:70:3
#13 0x0000ae84eb69f780 llvm::allocate_buffer(unsigned long, unsigned long) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support/MemAlloc.cpp:21:14
#14 0x0000ae84e4c013c8 capacity /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/ADT/SmallVector.h:81:36
#15 0x0000ae84e4c013c8 reserveForParamAndGetAddressImpl<llvm::SmallVectorTemplateBase<void *, true> > /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/ADT/SmallVector.h:236:38
#16 0x0000ae84e4c013c8 reserveForParamAndGetAddress /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/ADT/SmallVector.h:538:9
#17 0x0000ae84e4c013c8 push_back /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/ADT/SmallVector.h:563:23
#18 0x0000ae84e4c013c8 StartNewSlab /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/Support/Allocator.h:353:11
#19 0x0000ae84e4c013c8 llvm::BumpPtrAllocatorImpl<llvm::MallocAllocator, 4096ul, 4096ul, 128ul>::AllocateSlow(unsigned long, unsigned long, llvm::Align) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/Support/Allocator.h:203:5
#20 0x0000ae84f2a33448 clang::ParmVarDecl::Create(clang::ASTContext&, clang::DeclContext*, clang::SourceLocation, clang::SourceLocation, clang::IdentifierInfo const*, clang::QualType, clang::TypeSourceInfo*, clang::StorageClass, clang::Expr*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/AST/Decl.cpp:0:10
#21 0x0000ae84f0fc6e70 clang::Sema::CheckParameter(clang::DeclContext*, clang::SourceLocation, clang::SourceLocation, clang::IdentifierInfo const*, clang::QualType, clang::TypeSourceInfo*, clang::StorageClass) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Sema/SemaDecl.cpp:15702:22
#22 0x0000ae84f0fc5d9c clang::Sema::ActOnParamDeclarator(clang::Scope*, clang::Declarator&, clang::SourceLocation) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Sema/SemaDecl.cpp:0:7
#23 0x0000ae84f0972154 is /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/include/clang/Lex/Token.h:102:44
#24 0x0000ae84f0972154 clang::Parser::ParseParameterDeclarationClause(clang::DeclaratorContext, clang::ParsedAttributes&, llvm::SmallVectorImpl<clang::DeclaratorChunk::ParamInfo>&, clang::SourceLocation&, bool) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Parse/ParseDecl.cpp:7621:15
#25 0x0000ae84f096aff8 size /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/ADT/SmallVector.h:80:32
#26 0x0000ae84f096aff8 clang::Parser::ParseFunctionDeclarator(clang::Declarator&, clang::ParsedAttributes&, clang::BalancedDelimiterTracker&, bool, bool) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Parse/ParseDecl.cpp:7227:26
#27 0x0000ae84f0965098 clang::Parser::ParseDirectDeclarator(clang::Declarator&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Parse/ParseDecl.cpp:6874:9
#28 0x0000ae84f09614a0 clang::Parser::ParseDeclaratorInternal(clang::Declarator&, void (clang::Parser::*)(clang::Declarator&)) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Parse/ParseDecl.cpp:6436:7
#29 0x0000ae84ecd2e56c clang::StackExhaustionHandler::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref<void ()>) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Basic/StackExhaustionHandler.cpp:21:1
#30 0x0000ae84f091853c clang::Parser::ParseDeclarator(clang::Declarator&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Parse/ParseDecl.cpp:6304:1
Step 13 (build stage3/msan build) failure: build stage3/msan build (failure)
...
[3174/5680] Building CXX object lib/Target/VE/MCTargetDesc/CMakeFiles/LLVMVEDesc.dir/VEMCCodeEmitter.cpp.o
[3175/5680] Building CXX object lib/Target/AArch64/MCTargetDesc/CMakeFiles/LLVMAArch64Desc.dir/AArch64MCTargetDesc.cpp.o
[3176/5680] Building CXX object lib/Target/X86/MCTargetDesc/CMakeFiles/LLVMX86Desc.dir/X86AsmBackend.cpp.o
[3177/5680] Building CXX object lib/CodeGen/AsmPrinter/CMakeFiles/LLVMAsmPrinter.dir/DwarfDebug.cpp.o
[3178/5680] Building CXX object lib/Target/SPIRV/Analysis/CMakeFiles/LLVMSPIRVAnalysis.dir/SPIRVConvergenceRegionAnalysis.cpp.o
[3179/5680] Building CXX object lib/LTO/CMakeFiles/LLVMLTO.dir/ThinLTOCodeGenerator.cpp.o
[3180/5680] Building CXX object lib/Target/NVPTX/MCTargetDesc/CMakeFiles/LLVMNVPTXDesc.dir/NVPTXInstPrinter.cpp.o
[3181/5680] Building CXX object tools/clang/lib/InstallAPI/CMakeFiles/obj.clangInstallAPI.dir/FileList.cpp.o
[3182/5680] Building CXX object tools/clang/lib/InstallAPI/CMakeFiles/obj.clangInstallAPI.dir/DylibVerifier.cpp.o
[3183/5680] Building CXX object tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/DebugContainerModeling.cpp.o
FAILED: tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/DebugContainerModeling.cpp.o 
/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/clang++ -DCLANG_EXPORTS -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GLIBCXX_USE_CXX11_ABI=1 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build2_msan/tools/clang/lib/StaticAnalyzer/Checkers -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/StaticAnalyzer/Checkers -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/include -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build2_msan/tools/clang/include -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build2_msan/include -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -fno-common -Woverloaded-virtual -Wno-nested-anon-types -O3 -DNDEBUG -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/DebugContainerModeling.cpp.o -MF tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/DebugContainerModeling.cpp.o.d -o tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/DebugContainerModeling.cpp.o -c /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/StaticAnalyzer/Checkers/DebugContainerModeling.cpp
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build_msan/bin/clang++ -DCLANG_EXPORTS -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GLIBCXX_USE_CXX11_ABI=1 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build2_msan/tools/clang/lib/StaticAnalyzer/Checkers -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/StaticAnalyzer/Checkers -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/include -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build2_msan/tools/clang/include -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm_build2_msan/include -I/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -fno-common -Woverloaded-virtual -Wno-nested-anon-types -O3 -DNDEBUG -std=c++17 -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/DebugContainerModeling.cpp.o -MF tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/DebugContainerModeling.cpp.o.d -o tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/DebugContainerModeling.cpp.o -c /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/StaticAnalyzer/Checkers/DebugContainerModeling.cpp
1.	/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/include/clang/Lex/PPCallbacks.h:429:42: current parser token ','
2.	/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/include/clang/Lex/PPCallbacks.h:25:1: parsing namespace 'clang'
3.	/home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/include/clang/Lex/PPCallbacks.h:37:1: parsing struct/union/class body 'clang::PPCallbacks'
 #0 0x0000ae84e4ae638c ___interceptor_backtrace /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/../sanitizer_common/sanitizer_common_interceptors.inc:4556:13
 #1 0x0000ae84eb7bdd04 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support/Unix/Signals.inc:838:7
 #2 0x0000ae84eb7b82f0 llvm::sys::RunSignalHandlers() /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support/Signals.cpp:105:18
 #3 0x0000ae84eb63b9a8 HandleCrash /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:73:5
 #4 0x0000ae84eb63b9a8 CrashRecoverySignalHandler(int) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support/CrashRecoveryContext.cpp:390:51
 #5 0x0000ae84e4b18298 ~ScopedThreadLocalStateBackup /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/msan.h:353:37
 #6 0x0000ae84e4b18298 SignalHandler(int) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/msan_interceptors.cpp:1154:1
 #7 0x0000f0000c8ea9c0 (linux-vdso.so.1+0x9c0)
 #8 0x0000f0000c3a7294 (/lib/aarch64-linux-gnu/libc.so.6+0xa7294)
 #9 0x0000ae84e4abbb40 MsanAllocate(__sanitizer::BufferedStackTrace*, unsigned long, unsigned long, bool) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/msan_allocator.cpp:256:9
#10 0x0000ae84e4abc34c SetErrnoOnNull /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/../sanitizer_common/sanitizer_allocator_checks.h:31:7
#11 0x0000ae84e4abc34c __msan::msan_memalign(unsigned long, unsigned long, __sanitizer::BufferedStackTrace*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/msan_allocator.cpp:432:10
#12 0x0000ae84e4b262a0 operator new(unsigned long, std::align_val_t, std::nothrow_t const&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/compiler-rt/lib/msan/msan_new_delete.cpp:70:3
#13 0x0000ae84eb69f780 llvm::allocate_buffer(unsigned long, unsigned long) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/lib/Support/MemAlloc.cpp:21:14
#14 0x0000ae84e4c013c8 capacity /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/ADT/SmallVector.h:81:36
#15 0x0000ae84e4c013c8 reserveForParamAndGetAddressImpl<llvm::SmallVectorTemplateBase<void *, true> > /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/ADT/SmallVector.h:236:38
#16 0x0000ae84e4c013c8 reserveForParamAndGetAddress /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/ADT/SmallVector.h:538:9
#17 0x0000ae84e4c013c8 push_back /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/ADT/SmallVector.h:563:23
#18 0x0000ae84e4c013c8 StartNewSlab /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/Support/Allocator.h:353:11
#19 0x0000ae84e4c013c8 llvm::BumpPtrAllocatorImpl<llvm::MallocAllocator, 4096ul, 4096ul, 128ul>::AllocateSlow(unsigned long, unsigned long, llvm::Align) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/Support/Allocator.h:203:5
#20 0x0000ae84f2a33448 clang::ParmVarDecl::Create(clang::ASTContext&, clang::DeclContext*, clang::SourceLocation, clang::SourceLocation, clang::IdentifierInfo const*, clang::QualType, clang::TypeSourceInfo*, clang::StorageClass, clang::Expr*) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/AST/Decl.cpp:0:10
#21 0x0000ae84f0fc6e70 clang::Sema::CheckParameter(clang::DeclContext*, clang::SourceLocation, clang::SourceLocation, clang::IdentifierInfo const*, clang::QualType, clang::TypeSourceInfo*, clang::StorageClass) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Sema/SemaDecl.cpp:15702:22
#22 0x0000ae84f0fc5d9c clang::Sema::ActOnParamDeclarator(clang::Scope*, clang::Declarator&, clang::SourceLocation) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Sema/SemaDecl.cpp:0:7
#23 0x0000ae84f0972154 is /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/include/clang/Lex/Token.h:102:44
#24 0x0000ae84f0972154 clang::Parser::ParseParameterDeclarationClause(clang::DeclaratorContext, clang::ParsedAttributes&, llvm::SmallVectorImpl<clang::DeclaratorChunk::ParamInfo>&, clang::SourceLocation&, bool) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Parse/ParseDecl.cpp:7621:15
#25 0x0000ae84f096aff8 size /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/llvm/include/llvm/ADT/SmallVector.h:80:32
#26 0x0000ae84f096aff8 clang::Parser::ParseFunctionDeclarator(clang::Declarator&, clang::ParsedAttributes&, clang::BalancedDelimiterTracker&, bool, bool) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Parse/ParseDecl.cpp:7227:26
#27 0x0000ae84f0965098 clang::Parser::ParseDirectDeclarator(clang::Declarator&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Parse/ParseDecl.cpp:6874:9
#28 0x0000ae84f09614a0 clang::Parser::ParseDeclaratorInternal(clang::Declarator&, void (clang::Parser::*)(clang::Declarator&)) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Parse/ParseDecl.cpp:6436:7
#29 0x0000ae84ecd2e56c clang::StackExhaustionHandler::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref<void ()>) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Basic/StackExhaustionHandler.cpp:21:1
#30 0x0000ae84f091853c clang::Parser::ParseDeclarator(clang::Declarator&) /home/b/sanitizer-aarch64-linux-bootstrap-msan/build/llvm-project/clang/lib/Parse/ParseDecl.cpp:6304:1

```

</details>

https://github.com/llvm/llvm-project/pull/169083

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