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MagentaTreehouse opened this issue Apr 20, 2025 · 3 comments
Open

[Clang] Crash on CTAD for alias template involving lambda #136504

MagentaTreehouse opened this issue Apr 20, 2025 · 3 comments
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clang:codegen IR generation bugs: mangling, exceptions, etc. confirmed Verified by a second party

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@MagentaTreehouse
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template <class T, class F>
struct A {
    A(T, F f = {}) { f({}); }
};

template <class T>
using AA = A<T, decltype([] (T) {})>;

AA a{0};

See https://compiler-explorer.com/z/bffrq8j91.

Unreachable:

non-canonical or dependent type in IR-generation
UNREACHABLE executed at /root/llvm-project/llvm/tools/clang/lib/CodeGen/CodeGenFunction.cpp:263!
Stack dump 
0.	Program arguments: /opt/compiler-explorer/clang-assertions-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 -std=c++20 <source>
1.	<eof> parser at end of file
2.	Per-file LLVM IR generation
3.	<source>:3:5: Generating code for declaration 'A<int, (lambda at <source>:7:26)>::A'
4.	<source>:3:20: LLVM IR generation of compound statement ('{}')
 #0 0x0000000003ef1728 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3ef1728)
 #1 0x0000000003eef3b4 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3eef3b4)
 #2 0x0000000003e33ef8 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x00007b77a7a42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x00007b77a7a969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #5 0x00007b77a7a42476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #6 0x00007b77a7a287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #7 0x0000000003e3f47a (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3e3f47a)
 #8 0x0000000004433f12 clang::CodeGen::CodeGenFunction::getEvaluationKind(clang::QualType) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4433f12)
 #9 0x000000000471c62f clang::CodeGen::isAggregateTypeForABI(clang::QualType) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x471c62f)
#10 0x0000000004702d14 (anonymous namespace)::X86_64ABIInfo::getIndirectResult(clang::QualType, unsigned int) const X86.cpp:0:0
#11 0x000000000470b338 (anonymous namespace)::X86_64ABIInfo::classifyArgumentType(clang::QualType, unsigned int, unsigned int&, unsigned int&, bool, bool) const X86.cpp:0:0
#12 0x000000000470bda4 (anonymous namespace)::X86_64ABIInfo::computeInfo(clang::CodeGen::CGFunctionInfo&) const X86.cpp:0:0
#13 0x000000000478c031 clang::CodeGen::CodeGenTypes::arrangeLLVMFunctionInfo(clang::CanQual<clang::Type>, clang::CodeGen::FnInfoOpts, llvm::ArrayRef<clang::CanQual<clang::Type>>, clang::FunctionType::ExtInfo, llvm::ArrayRef<clang::FunctionType::ExtParameterInfo>, clang::CodeGen::RequiredArgs) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x478c031)
#14 0x000000000478e643 arrangeLLVMFunctionInfo(clang::CodeGen::CodeGenTypes&, bool, llvm::SmallVectorImpl<clang::CanQual<clang::Type>>&, clang::CanQual<clang::FunctionProtoType>) CGCall.cpp:0:0
#15 0x000000000479187c clang::CodeGen::CodeGenTypes::arrangeCXXMethodType(clang::CXXRecordDecl const*, clang::FunctionProtoType const*, clang::CXXMethodDecl const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x479187c)
#16 0x0000000004791a7b clang::CodeGen::CodeGenTypes::arrangeCXXMethodDeclaration(clang::CXXMethodDecl const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4791a7b)
#17 0x000000000427b279 clang::CodeGen::CodeGenFunction::EmitCXXMemberOrOperatorMemberCallExpr(clang::CallExpr const*, clang::CXXMethodDecl const*, clang::CodeGen::ReturnValueSlot, bool, clang::NestedNameSpecifier*, bool, clang::Expr const*, llvm::CallBase**) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x427b279)
#18 0x000000000427c383 clang::CodeGen::CodeGenFunction::EmitCXXOperatorMemberCallExpr(clang::CXXOperatorCallExpr const*, clang::CXXMethodDecl const*, clang::CodeGen::ReturnValueSlot, llvm::CallBase**) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x427c383)
#19 0x0000000004256fc6 clang::CodeGen::CodeGenFunction::EmitCallExpr(clang::CallExpr const*, clang::CodeGen::ReturnValueSlot, llvm::CallBase**) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4256fc6)
#20 0x00000000042c8c34 (anonymous namespace)::ScalarExprEmitter::VisitCallExpr(clang::CallExpr const*) CGExprScalar.cpp:0:0
#21 0x00000000042bbea0 clang::StmtVisitorBase<std::add_pointer, (anonymous namespace)::ScalarExprEmitter, llvm::Value*>::Visit(clang::Stmt*) CGExprScalar.cpp:0:0
#22 0x00000000042c1c2c clang::CodeGen::CodeGenFunction::EmitScalarExpr(clang::Expr const*, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x42c1c2c)
#23 0x000000000422dfde clang::CodeGen::CodeGenFunction::EmitAnyExpr(clang::Expr const*, clang::CodeGen::AggValueSlot, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x422dfde)
#24 0x0000000004254f5d clang::CodeGen::CodeGenFunction::EmitIgnoredExpr(clang::Expr const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4254f5d)
#25 0x00000000043c777e clang::CodeGen::CodeGenFunction::EmitStmt(clang::Stmt const*, llvm::ArrayRef<clang::Attr const*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x43c777e)
#26 0x00000000043cf6ec clang::CodeGen::CodeGenFunction::EmitCompoundStmtWithoutScope(clang::CompoundStmt const&, bool, clang::CodeGen::AggValueSlot) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x43cf6ec)
#27 0x00000000043cfafd clang::CodeGen::CodeGenFunction::EmitCompoundStmt(clang::CompoundStmt const&, bool, clang::CodeGen::AggValueSlot) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x43cfafd)
#28 0x00000000043cfcc5 clang::CodeGen::CodeGenFunction::EmitSimpleStmt(clang::Stmt const*, llvm::ArrayRef<clang::Attr const*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x43cfcc5)
#29 0x00000000043c7705 clang::CodeGen::CodeGenFunction::EmitStmt(clang::Stmt const*, llvm::ArrayRef<clang::Attr const*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x43c7705)
#30 0x00000000047c670f clang::CodeGen::CodeGenFunction::EmitConstructorBody(clang::CodeGen::FunctionArgList&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x47c670f)
#31 0x000000000444912d clang::CodeGen::CodeGenFunction::GenerateCode(clang::GlobalDecl, llvm::Function*, clang::CodeGen::CGFunctionInfo const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x444912d)
#32 0x000000000477b9af clang::CodeGen::CodeGenModule::codegenCXXStructor(clang::GlobalDecl) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x477b9af)
#33 0x0000000004527fcd (anonymous namespace)::ItaniumCXXABI::emitCXXStructor(clang::GlobalDecl) ItaniumCXXABI.cpp:0:0
#34 0x00000000044ad376 clang::CodeGen::CodeGenModule::EmitGlobalDefinition(clang::GlobalDecl, llvm::GlobalValue*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x44ad376)
#35 0x00000000044b9857 clang::CodeGen::CodeGenModule::EmitDeferred() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x44b9857)
#36 0x00000000044b9778 clang::CodeGen::CodeGenModule::EmitDeferred() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x44b9778)
#37 0x00000000044bbde3 clang::CodeGen::CodeGenModule::Release() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x44bbde3)
#38 0x00000000048925ce (anonymous namespace)::CodeGeneratorImpl::HandleTranslationUnit(clang::ASTContext&) ModuleBuilder.cpp:0:0
#39 0x000000000488ea35 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x488ea35)
#40 0x0000000006541fac clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6541fac)
#41 0x000000000488f1c8 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x488f1c8)
#42 0x0000000004b81c05 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4b81c05)
#43 0x0000000004b00bde clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4b00bde)
#44 0x0000000004c70e6e clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4c70e6e)
#45 0x0000000000d9decf cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd9decf)
#46 0x0000000000d955da ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#47 0x00000000048f57c9 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
#48 0x0000000003e34394 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3e34394)
#49 0x00000000048f5ddf 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
#50 0x00000000048b82fd clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x48b82fd)
#51 0x00000000048b938e clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x48b938e)
#52 0x00000000048c11b5 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x48c11b5)
#53 0x0000000000d9ac18 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd9ac18)
#54 0x0000000000c229f4 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc229f4)
#55 0x00007b77a7a29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#56 0x00007b77a7a29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#57 0x0000000000d95085 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd95085)
@llvmbot llvmbot added the clang Clang issues not falling into any other category label Apr 20, 2025
@EugeneZelenko EugeneZelenko added clang:codegen IR generation bugs: mangling, exceptions, etc. and removed clang Clang issues not falling into any other category labels Apr 21, 2025
@llvmbot
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llvmbot commented Apr 21, 2025

@llvm/issue-subscribers-clang-codegen

Author: None (MagentaTreehouse)

```c++ template <class T, class F> struct A { A(T, F f = {}) { f({}); } };

template <class T>
using AA = A<T, decltype([] (T) {})>;

AA a{0};


See https://compiler-explorer.com/z/bffrq8j91.

Unreachable:
```console
non-canonical or dependent type in IR-generation
UNREACHABLE executed at /root/llvm-project/llvm/tools/clang/lib/CodeGen/CodeGenFunction.cpp:263!

<details>

<summary>Stack dump</summary>

0.	Program arguments: /opt/compiler-explorer/clang-assertions-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 -std=c++20 &lt;source&gt;
1.	&lt;eof&gt; parser at end of file
2.	Per-file LLVM IR generation
3.	&lt;source&gt;:3:5: Generating code for declaration 'A&lt;int, (lambda at &lt;source&gt;:7:26)&gt;::A'
4.	&lt;source&gt;:3:20: LLVM IR generation of compound statement ('{}')
 #<!-- -->0 0x0000000003ef1728 llvm::sys::PrintStackTrace(llvm::raw_ostream&amp;, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3ef1728)
 #<!-- -->1 0x0000000003eef3b4 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3eef3b4)
 #<!-- -->2 0x0000000003e33ef8 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #<!-- -->3 0x00007b77a7a42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #<!-- -->4 0x00007b77a7a969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #<!-- -->5 0x00007b77a7a42476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #<!-- -->6 0x00007b77a7a287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #<!-- -->7 0x0000000003e3f47a (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3e3f47a)
 #<!-- -->8 0x0000000004433f12 clang::CodeGen::CodeGenFunction::getEvaluationKind(clang::QualType) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4433f12)
 #<!-- -->9 0x000000000471c62f clang::CodeGen::isAggregateTypeForABI(clang::QualType) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x471c62f)
#<!-- -->10 0x0000000004702d14 (anonymous namespace)::X86_64ABIInfo::getIndirectResult(clang::QualType, unsigned int) const X86.cpp:0:0
#<!-- -->11 0x000000000470b338 (anonymous namespace)::X86_64ABIInfo::classifyArgumentType(clang::QualType, unsigned int, unsigned int&amp;, unsigned int&amp;, bool, bool) const X86.cpp:0:0
#<!-- -->12 0x000000000470bda4 (anonymous namespace)::X86_64ABIInfo::computeInfo(clang::CodeGen::CGFunctionInfo&amp;) const X86.cpp:0:0
#<!-- -->13 0x000000000478c031 clang::CodeGen::CodeGenTypes::arrangeLLVMFunctionInfo(clang::CanQual&lt;clang::Type&gt;, clang::CodeGen::FnInfoOpts, llvm::ArrayRef&lt;clang::CanQual&lt;clang::Type&gt;&gt;, clang::FunctionType::ExtInfo, llvm::ArrayRef&lt;clang::FunctionType::ExtParameterInfo&gt;, clang::CodeGen::RequiredArgs) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x478c031)
#<!-- -->14 0x000000000478e643 arrangeLLVMFunctionInfo(clang::CodeGen::CodeGenTypes&amp;, bool, llvm::SmallVectorImpl&lt;clang::CanQual&lt;clang::Type&gt;&gt;&amp;, clang::CanQual&lt;clang::FunctionProtoType&gt;) CGCall.cpp:0:0
#<!-- -->15 0x000000000479187c clang::CodeGen::CodeGenTypes::arrangeCXXMethodType(clang::CXXRecordDecl const*, clang::FunctionProtoType const*, clang::CXXMethodDecl const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x479187c)
#<!-- -->16 0x0000000004791a7b clang::CodeGen::CodeGenTypes::arrangeCXXMethodDeclaration(clang::CXXMethodDecl const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4791a7b)
#<!-- -->17 0x000000000427b279 clang::CodeGen::CodeGenFunction::EmitCXXMemberOrOperatorMemberCallExpr(clang::CallExpr const*, clang::CXXMethodDecl const*, clang::CodeGen::ReturnValueSlot, bool, clang::NestedNameSpecifier*, bool, clang::Expr const*, llvm::CallBase**) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x427b279)
#<!-- -->18 0x000000000427c383 clang::CodeGen::CodeGenFunction::EmitCXXOperatorMemberCallExpr(clang::CXXOperatorCallExpr const*, clang::CXXMethodDecl const*, clang::CodeGen::ReturnValueSlot, llvm::CallBase**) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x427c383)
#<!-- -->19 0x0000000004256fc6 clang::CodeGen::CodeGenFunction::EmitCallExpr(clang::CallExpr const*, clang::CodeGen::ReturnValueSlot, llvm::CallBase**) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4256fc6)
#<!-- -->20 0x00000000042c8c34 (anonymous namespace)::ScalarExprEmitter::VisitCallExpr(clang::CallExpr const*) CGExprScalar.cpp:0:0
#<!-- -->21 0x00000000042bbea0 clang::StmtVisitorBase&lt;std::add_pointer, (anonymous namespace)::ScalarExprEmitter, llvm::Value*&gt;::Visit(clang::Stmt*) CGExprScalar.cpp:0:0
#<!-- -->22 0x00000000042c1c2c clang::CodeGen::CodeGenFunction::EmitScalarExpr(clang::Expr const*, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x42c1c2c)
#<!-- -->23 0x000000000422dfde clang::CodeGen::CodeGenFunction::EmitAnyExpr(clang::Expr const*, clang::CodeGen::AggValueSlot, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x422dfde)
#<!-- -->24 0x0000000004254f5d clang::CodeGen::CodeGenFunction::EmitIgnoredExpr(clang::Expr const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4254f5d)
#<!-- -->25 0x00000000043c777e clang::CodeGen::CodeGenFunction::EmitStmt(clang::Stmt const*, llvm::ArrayRef&lt;clang::Attr const*&gt;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x43c777e)
#<!-- -->26 0x00000000043cf6ec clang::CodeGen::CodeGenFunction::EmitCompoundStmtWithoutScope(clang::CompoundStmt const&amp;, bool, clang::CodeGen::AggValueSlot) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x43cf6ec)
#<!-- -->27 0x00000000043cfafd clang::CodeGen::CodeGenFunction::EmitCompoundStmt(clang::CompoundStmt const&amp;, bool, clang::CodeGen::AggValueSlot) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x43cfafd)
#<!-- -->28 0x00000000043cfcc5 clang::CodeGen::CodeGenFunction::EmitSimpleStmt(clang::Stmt const*, llvm::ArrayRef&lt;clang::Attr const*&gt;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x43cfcc5)
#<!-- -->29 0x00000000043c7705 clang::CodeGen::CodeGenFunction::EmitStmt(clang::Stmt const*, llvm::ArrayRef&lt;clang::Attr const*&gt;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x43c7705)
#<!-- -->30 0x00000000047c670f clang::CodeGen::CodeGenFunction::EmitConstructorBody(clang::CodeGen::FunctionArgList&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x47c670f)
#<!-- -->31 0x000000000444912d clang::CodeGen::CodeGenFunction::GenerateCode(clang::GlobalDecl, llvm::Function*, clang::CodeGen::CGFunctionInfo const&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x444912d)
#<!-- -->32 0x000000000477b9af clang::CodeGen::CodeGenModule::codegenCXXStructor(clang::GlobalDecl) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x477b9af)
#<!-- -->33 0x0000000004527fcd (anonymous namespace)::ItaniumCXXABI::emitCXXStructor(clang::GlobalDecl) ItaniumCXXABI.cpp:0:0
#<!-- -->34 0x00000000044ad376 clang::CodeGen::CodeGenModule::EmitGlobalDefinition(clang::GlobalDecl, llvm::GlobalValue*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x44ad376)
#<!-- -->35 0x00000000044b9857 clang::CodeGen::CodeGenModule::EmitDeferred() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x44b9857)
#<!-- -->36 0x00000000044b9778 clang::CodeGen::CodeGenModule::EmitDeferred() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x44b9778)
#<!-- -->37 0x00000000044bbde3 clang::CodeGen::CodeGenModule::Release() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x44bbde3)
#<!-- -->38 0x00000000048925ce (anonymous namespace)::CodeGeneratorImpl::HandleTranslationUnit(clang::ASTContext&amp;) ModuleBuilder.cpp:0:0
#<!-- -->39 0x000000000488ea35 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x488ea35)
#<!-- -->40 0x0000000006541fac clang::ParseAST(clang::Sema&amp;, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6541fac)
#<!-- -->41 0x000000000488f1c8 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x488f1c8)
#<!-- -->42 0x0000000004b81c05 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4b81c05)
#<!-- -->43 0x0000000004b00bde clang::CompilerInstance::ExecuteAction(clang::FrontendAction&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4b00bde)
#<!-- -->44 0x0000000004c70e6e clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4c70e6e)
#<!-- -->45 0x0000000000d9decf cc1_main(llvm::ArrayRef&lt;char const*&gt;, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd9decf)
#<!-- -->46 0x0000000000d955da ExecuteCC1Tool(llvm::SmallVectorImpl&lt;char const*&gt;&amp;, llvm::ToolContext const&amp;) driver.cpp:0:0
#<!-- -->47 0x00000000048f57c9 void llvm::function_ref&lt;void ()&gt;::callback_fn&lt;clang::driver::CC1Command::Execute(llvm::ArrayRef&lt;std::optional&lt;llvm::StringRef&gt;&gt;, std::__cxx11::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt;&gt;*, bool*) const::'lambda'()&gt;(long) Job.cpp:0:0
#<!-- -->48 0x0000000003e34394 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref&lt;void ()&gt;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3e34394)
#<!-- -->49 0x00000000048f5ddf clang::driver::CC1Command::Execute(llvm::ArrayRef&lt;std::optional&lt;llvm::StringRef&gt;&gt;, std::__cxx11::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt;&gt;*, bool*) const (.part.0) Job.cpp:0:0
#<!-- -->50 0x00000000048b82fd clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&amp;, clang::driver::Command const*&amp;, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x48b82fd)
#<!-- -->51 0x00000000048b938e clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&amp;, llvm::SmallVectorImpl&lt;std::pair&lt;int, clang::driver::Command const*&gt;&gt;&amp;, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x48b938e)
#<!-- -->52 0x00000000048c11b5 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&amp;, llvm::SmallVectorImpl&lt;std::pair&lt;int, clang::driver::Command const*&gt;&gt;&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x48c11b5)
#<!-- -->53 0x0000000000d9ac18 clang_main(int, char**, llvm::ToolContext const&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd9ac18)
#<!-- -->54 0x0000000000c229f4 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc229f4)
#<!-- -->55 0x00007b77a7a29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#<!-- -->56 0x00007b77a7a29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#<!-- -->57 0x0000000000d95085 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd95085)

</details>

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shafik commented Apr 21, 2025

CC @hokein

@shafik shafik added the confirmed Verified by a second party label Apr 21, 2025
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shafik commented Apr 21, 2025

Looks like a variety of: #33335

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clang:codegen IR generation bugs: mangling, exceptions, etc. confirmed Verified by a second party
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