$ clang-trunk -v
clang version 13.0.0 (https://github.com/llvm/llvm-project.git 699d47472c3f7c5799fe75486689545179cfba03)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/cnsun/usr/bin
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/10
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/9
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/10
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64

$ cat mutant.c
typedef
    struct {
struct {
struct {
struct {
struct {
struct {
struct {
struct {
struct {
struct {
struct {
struct {
struct {
struct {
struct {
struct {
struct {
struct {
struct {
struct {
struct {
struct {
struct {
struct {
struct {
struct {
struct {
struct {
struct {
long
 dat[2]
} dat[2]
} dat[2]
} dat[2]
} dat[2]
} dat[2]
} dat[2]
} dat[2]
} dat[2]
} dat[2]
} dat[2]
} dat[2]
} dat[2]
} dat[2]
} dat[2]
} dat[2]
} dat[2]
} dat[2]
} dat[2]
} dat[2]
} dat[2]
} dat[2]
} dat[2]
} dat[2]
} dat[2]
} dat[2]
} dat[2]
} dat[2]
} dat[2]
} gsl_complex_long_double;
gsl_vector_complex_long_double_set_zero() {
gsl_complex_long_double zero = {
}
;
}

$ clang-trunk -O1 -w mutant.c
clang-13: /tmp/tmp.MZZAoX1zOr-clang-builder/llvm-project/llvm/lib/IR/Type.cpp:651: static llvm::FixedVectorType* llvm::FixedVectorType::get(llvm::Type*, unsigned int): Assertion `NumElts > 0 && "#Elements of a VectorType must be greater than 0"' failed.
PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: /scratch/software/clang-trunk/bin/clang-13 -cc1 -triple x86_64-unknown-linux-gnu -emit-obj --mrelax-relocations -disable-free -main-file-name mutant.c -mrelocation-model static -mframe-pointer=none -fmath-errno -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/scratch/cnsun/workspace/perses-fuzzer/default_c_finding_folder/crash_20210626_082532_060d/delta/perses_result -resource-dir /scratch/software/clang-trunk/lib/clang/13.0.0 -c-isystem . -c-isystem /usr/local/include/cmsith -internal-isystem /scratch/software/clang-trunk/lib/clang/13.0.0/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O1 -w -fdebug-compilation-dir=/scratch/cnsun/workspace/perses-fuzzer/default_c_finding_folder/crash_20210626_082532_060d/delta/perses_result -ferror-limit 19 -fgnuc-version=4.2.1 -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/mutant-ff529f.o -x c mutant.c
1.	<eof> parser at end of file
2.	Optimizer
 #0 0x000056119b9ad684 PrintStackTraceSignalHandler(void*) Signals.cpp:0:0
 #1 0x000056119b9aae3e SignalHandler(int) Signals.cpp:0:0
 #2 0x00007f09552773c0 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x153c0)
 #3 0x00007f0954d1618b raise /build/glibc-ZN95T4/glibc-2.31/signal/../sysdeps/unix/sysv/linux/raise.c:51:1
 #4 0x00007f0954cf5859 abort /build/glibc-ZN95T4/glibc-2.31/stdlib/abort.c:81:7
 #5 0x00007f0954cf5729 get_sysdep_segment_value /build/glibc-ZN95T4/glibc-2.31/intl/loadmsgcat.c:509:8
 #6 0x00007f0954cf5729 _nl_load_domain /build/glibc-ZN95T4/glibc-2.31/intl/loadmsgcat.c:970:34
 #7 0x00007f0954d06f36 (/lib/x86_64-linux-gnu/libc.so.6+0x36f36)
 #8 0x000056119b0fe11c llvm::FixedVectorType::get(llvm::Type*, unsigned int) (/scratch/software/clang-trunk/bin/clang-13+0x30ae11c)
 #9 0x000056119b8358ba llvm::sroa::AllocaSliceRewriter::visitMemSetInst(llvm::MemSetInst&) (/scratch/software/clang-trunk/bin/clang-13+0x37e58ba)
#10 0x000056119b83ecc4 llvm::sroa::AllocaSliceRewriter::visit((anonymous namespace)::Slice const*) SROA.cpp:0:0
#11 0x000056119b84373f llvm::SROA::rewritePartition(llvm::AllocaInst&, llvm::sroa::AllocaSlices&, llvm::sroa::Partition&) (/scratch/software/clang-trunk/bin/clang-13+0x37f373f)
#12 0x000056119b84525a llvm::SROA::splitAlloca(llvm::AllocaInst&, llvm::sroa::AllocaSlices&) (.part.0) SROA.cpp:0:0
#13 0x000056119b847847 llvm::SROA::runOnAlloca(llvm::AllocaInst&) (/scratch/software/clang-trunk/bin/clang-13+0x37f7847)
#14 0x000056119b84960d llvm::SROA::runImpl(llvm::Function&, llvm::DominatorTree&, llvm::AssumptionCache&) (/scratch/software/clang-trunk/bin/clang-13+0x37f960d)
#15 0x000056119b84a6d9 llvm::SROA::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/scratch/software/clang-trunk/bin/clang-13+0x37fa6d9)
#16 0x000056119ccd11a6 llvm::detail::PassModel<llvm::Function, llvm::SROA, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function> >::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/scratch/software/clang-trunk/bin/clang-13+0x4c811a6)
#17 0x000056119b0e9816 llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function> >::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/scratch/software/clang-trunk/bin/clang-13+0x3099816)
#18 0x000056119957c4a6 llvm::detail::PassModel<llvm::Function, llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function> >, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Function> >::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/scratch/software/clang-trunk/bin/clang-13+0x152c4a6)
#19 0x000056119b0e8339 llvm::ModuleToFunctionPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/scratch/software/clang-trunk/bin/clang-13+0x3098339)
#20 0x000056119957cd16 llvm::detail::PassModel<llvm::Module, llvm::ModuleToFunctionPassAdaptor, llvm::PreservedAnalyses, llvm::AnalysisManager<llvm::Module> >::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/scratch/software/clang-trunk/bin/clang-13+0x152cd16)
#21 0x000056119b0e5c1f llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module> >::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/scratch/software/clang-trunk/bin/clang-13+0x3095c1f)
#22 0x000056119bcdec6d (anonymous namespace)::EmitAssemblyHelper::EmitAssemblyWithNewPassManager(clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream> >) BackendUtil.cpp:0:0
#23 0x000056119bce1eed clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::HeaderSearchOptions const&, clang::CodeGenOptions const&, clang::TargetOptions const&, clang::LangOptions const&, llvm::StringRef, llvm::Module*, clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream, std::default_delete<llvm::raw_pwrite_stream> >) (/scratch/software/clang-trunk/bin/clang-13+0x3c91eed)
#24 0x000056119cb0b6cf clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/scratch/software/clang-trunk/bin/clang-13+0x4abb6cf)
#25 0x000056119dbc2d89 clang::ParseAST(clang::Sema&, bool, bool) (/scratch/software/clang-trunk/bin/clang-13+0x5b72d89)
#26 0x000056119cb0a218 clang::CodeGenAction::ExecuteAction() (/scratch/software/clang-trunk/bin/clang-13+0x4aba218)
#27 0x000056119c3b9a79 clang::FrontendAction::Execute() (/scratch/software/clang-trunk/bin/clang-13+0x4369a79)
#28 0x000056119c34ccc6 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/scratch/software/clang-trunk/bin/clang-13+0x42fccc6)
#29 0x000056119c4979c0 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/scratch/software/clang-trunk/bin/clang-13+0x44479c0)
#30 0x00005611992b5696 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/scratch/software/clang-trunk/bin/clang-13+0x1265696)
#31 0x00005611992b19d8 ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&) driver.cpp:0:0
#32 0x00005611991df0e6 main (/scratch/software/clang-trunk/bin/clang-13+0x118f0e6)
#33 0x00007f0954cf70b3 __libc_start_main /build/glibc-ZN95T4/glibc-2.31/csu/../csu/libc-start.c:342:3
#34 0x00005611992b154e _start (/scratch/software/clang-trunk/bin/clang-13+0x126154e)
clang-13: error: unable to execute command: Aborted (core dumped)
clang-13: error: clang frontend command failed due to signal (use -v to see invocation)
clang version 13.0.0 (https://github.com/llvm/llvm-project.git 699d47472c3f7c5799fe75486689545179cfba03)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/cnsun/usr/bin
clang-13: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-13: note: diagnostic msg: /tmp/mutant-c879ed.c
clang-13: note: diagnostic msg: /tmp/mutant-c879ed.sh
clang-13: note: diagnostic msg:

********************