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clang-18 frontend segfault (tryCaptureVariable) #90669

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mhx opened this issue Apr 30, 2024 · 4 comments · Fixed by #93206
Closed

clang-18 frontend segfault (tryCaptureVariable) #90669

mhx opened this issue Apr 30, 2024 · 4 comments · Fixed by #93206
Labels
c++20 clang:frontend Language frontend issues, e.g. anything involving "Sema" concepts C++20 concepts confirmed Verified by a second party crash Prefer [crash-on-valid] or [crash-on-invalid]

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@mhx
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mhx commented Apr 30, 2024

Apologies for not providing a shorter test case, but I came across this ICE while working on a project and cvise only managed to get the preprocessed output from 280k to 100kLOC. This is the code that reproduces the crash: scanner-pp.cpp.gz To reproduce:

$ clang++-18 -std=c++20 -c scanner-pp.cpp

The code crashes just about every clang-18 I've tried (gentoo clang-18.1.4, ubuntu clang-18.1.2, every clang-18 / clang-trunk on compiler explorer). It compiles fine with clang-17.

Here's the stack trace from a run on compiler explorer:

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-18.1.0/bin/clang++ -gdwarf-4 -g -o /app/output.s -mllvm --x86-asm-syntax=intel -S --gcc-toolchain=/opt/compiler-explorer/gcc-13.2.0 -fcolor-diagnostics -fno-crash-diagnostics -std=c++20 <source>
1.	<eof> parser at end of file
2.	/usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:89286:23: instantiating function definition 'dwarfs::make_unique_logging_object<dwarfs::scanner::impl, dwarfs::scanner_, std::tuple<dwarfs::debug_logger_policy, dwarfs::prod_logger_policy>, dwarfs::worker_group &, std::shared_ptr<dwarfs::segmenter_factory>, std::shared_ptr<dwarfs::entry_factory>, std::shared_ptr<const dwarfs::os_access>, std::shared_ptr<dwarfs::script>, const dwarfs::scanner_options &>'
3.	/usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:89264:3: instantiating function definition 'dwarfs::logging_class_factory<dwarfs::scanner_, dwarfs::unique_ptr_policy<dwarfs::scanner::impl>, std::tuple<dwarfs::debug_logger_policy, dwarfs::prod_logger_policy>, 2>::create<dwarfs::worker_group &, std::shared_ptr<dwarfs::segmenter_factory>, std::shared_ptr<dwarfs::entry_factory>, std::shared_ptr<const dwarfs::os_access>, std::shared_ptr<dwarfs::script>, const dwarfs::scanner_options &>'
4.	/usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:89247:22: instantiating function definition 'dwarfs::unique_ptr_policy<dwarfs::scanner::impl>::create<dwarfs::scanner_<dwarfs::prod_logger_policy>, dwarfs::logger &, dwarfs::worker_group &, std::shared_ptr<dwarfs::segmenter_factory>, std::shared_ptr<dwarfs::entry_factory>, std::shared_ptr<const dwarfs::os_access>, std::shared_ptr<dwarfs::script>, const dwarfs::scanner_options &>'
5.	/usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:27767:7: instantiating function definition 'std::unique_ptr<dwarfs::scanner_<dwarfs::prod_logger_policy>>::~unique_ptr'
6.	/usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:27611:7: instantiating function definition 'std::default_delete<dwarfs::scanner_<dwarfs::prod_logger_policy>>::operator()'
7.	/usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:99724:30: instantiating function definition 'dwarfs::scanner_<dwarfs::prod_logger_policy>::scan'
8.	/usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:53611:6: instantiating function definition 'dwarfs::queued_for_each<dwarfs::sortable_span<const std::shared_ptr<dwarfs::inode>, unsigned int>, (lambda at /usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:99855:11), (lambda at /usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:99888:11)>'
9.	/usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:99855:11: instantiating function definition 'dwarfs::scanner_<dwarfs::prod_logger_policy>::scan(filesystem_writer &, const std::filesystem::path &, progress &, std::optional<std::span<const std::filesystem::path>>, std::shared_ptr<const file_access>)::(anonymous class)::operator()()::(anonymous class)::operator()<std::shared_ptr<dwarfs::inode>>'
 #0 0x000000000351ae38 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x351ae38)
 #1 0x0000000003518f84 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x3518f84)
 #2 0x0000000003467018 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x000070661f642520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x000000000610f721 clang::Sema::tryCaptureVariable(clang::ValueDecl*, clang::SourceLocation, clang::Sema::TryCaptureKind, clang::SourceLocation, bool, clang::QualType&, clang::QualType&, unsigned int const*) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x610f721)
 #5 0x000000000613bbbd clang::Sema::BuildDeclRefExpr(clang::ValueDecl*, clang::QualType, clang::ExprValueKind, clang::DeclarationNameInfo const&, clang::NestedNameSpecifierLoc, clang::NamedDecl*, clang::SourceLocation, clang::TemplateArgumentListInfo const*) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x613bbbd)
 #6 0x000000000613c23c clang::Sema::BuildDeclRefExpr(clang::ValueDecl*, clang::QualType, clang::ExprValueKind, clang::DeclarationNameInfo const&, clang::CXXScopeSpec const*, clang::NamedDecl*, clang::SourceLocation, clang::TemplateArgumentListInfo const*) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x613c23c)
 #7 0x00000000061411f7 clang::Sema::BuildDeclarationNameExpr(clang::CXXScopeSpec const&, clang::DeclarationNameInfo const&, clang::NamedDecl*, clang::NamedDecl*, clang::TemplateArgumentListInfo const*, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x61411f7)
 #8 0x00000000066cf6f2 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformDeclRefExpr(clang::DeclRefExpr*) SemaTemplateInstantiate.cpp:0:0
 #9 0x00000000066ad7fb clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#10 0x00000000066d04d5 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformCXXDependentScopeMemberExpr(clang::CXXDependentScopeMemberExpr*) SemaTemplateInstantiate.cpp:0:0
#11 0x00000000066ad63f clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#12 0x00000000066b69e4 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformCallExpr(clang::CallExpr*) SemaTemplateInstantiate.cpp:0:0
#13 0x00000000066ad70a clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#14 0x00000000066b853b clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformBinaryOperator(clang::BinaryOperator*) SemaTemplateInstantiate.cpp:0:0
#15 0x00000000066ad5c9 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#16 0x00000000066d8acb clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformRequiresExpr(clang::RequiresExpr*) SemaTemplateInstantiate.cpp:0:0
#17 0x00000000066add36 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#18 0x00000000066b8b6b clang::Sema::SubstConstraintExpr(clang::Expr*, clang::MultiLevelTemplateArgumentList const&) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x66b8b6b)
#19 0x0000000005e64f91 calculateConstraintSatisfaction(clang::Sema&, clang::NamedDecl const*, clang::SourceLocation, clang::MultiLevelTemplateArgumentList const&, clang::Expr const*, clang::ConstraintSatisfaction&)::'lambda'(clang::Expr const*)::operator()(clang::Expr const*) const SemaConcept.cpp:0:0
#20 0x0000000005e6638d clang::ActionResult<clang::Expr*, true> calculateConstraintSatisfaction<calculateConstraintSatisfaction(clang::Sema&, clang::NamedDecl const*, clang::SourceLocation, clang::MultiLevelTemplateArgumentList const&, clang::Expr const*, clang::ConstraintSatisfaction&)::'lambda'(clang::Expr const*)>(clang::Sema&, clang::Expr const*, clang::ConstraintSatisfaction&, calculateConstraintSatisfaction(clang::Sema&, clang::NamedDecl const*, clang::SourceLocation, clang::MultiLevelTemplateArgumentList const&, clang::Expr const*, clang::ConstraintSatisfaction&)::'lambda'(clang::Expr const*)&&) SemaConcept.cpp:0:0
#21 0x0000000005e66d08 CheckConstraintSatisfaction(clang::Sema&, clang::NamedDecl const*, llvm::ArrayRef<clang::Expr const*>, llvm::SmallVectorImpl<clang::Expr*>&, clang::MultiLevelTemplateArgumentList const&, clang::SourceRange, clang::ConstraintSatisfaction&) SemaConcept.cpp:0:0
#22 0x0000000005e672a8 clang::Sema::CheckConstraintSatisfaction(clang::NamedDecl const*, llvm::ArrayRef<clang::Expr const*>, llvm::SmallVectorImpl<clang::Expr*>&, clang::MultiLevelTemplateArgumentList const&, clang::SourceRange, clang::ConstraintSatisfaction&) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x5e672a8)
#23 0x0000000005e67f1f clang::Sema::CheckInstantiatedFunctionTemplateConstraints(clang::SourceLocation, clang::FunctionDecl*, llvm::ArrayRef<clang::TemplateArgument>, clang::ConstraintSatisfaction&) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x5e67f1f)
#24 0x000000000666f1ea clang::Sema::FinishTemplateArgumentDeduction(clang::FunctionTemplateDecl*, llvm::SmallVectorImpl<clang::DeducedTemplateArgument>&, unsigned int, clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, llvm::SmallVectorImpl<clang::Sema::OriginalCallArg> const*, bool, llvm::function_ref<bool ()>) (.constprop.0) SemaTemplateDeduction.cpp:0:0
#25 0x000000000666fd0a void llvm::function_ref<void ()>::callback_fn<clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, bool, bool, clang::QualType, clang::Expr::Classification, llvm::function_ref<bool (llvm::ArrayRef<clang::QualType>)>)::'lambda1'()>(long) SemaTemplateDeduction.cpp:0:0
#26 0x0000000005cff961 clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x5cff961)
#27 0x000000000668554a clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, bool, bool, clang::QualType, clang::Expr::Classification, llvm::function_ref<bool (llvm::ArrayRef<clang::QualType>)>) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x668554a)
#28 0x00000000064a057a clang::Sema::AddTemplateOverloadCandidate(clang::FunctionTemplateDecl*, clang::DeclAccessPair, clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, clang::OverloadCandidateSet&, bool, bool, bool, clang::CallExpr::ADLCallKind, clang::OverloadCandidateParamOrder, bool) (.constprop.1) SemaOverload.cpp:0:0
#29 0x00000000064a1336 clang::Sema::AddArgumentDependentLookupCandidates(clang::DeclarationName, clang::SourceLocation, llvm::ArrayRef<clang::Expr*>, clang::TemplateArgumentListInfo*, clang::OverloadCandidateSet&, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x64a1336)
#30 0x00000000064a3b0a clang::Sema::LookupOverloadedBinOp(clang::OverloadCandidateSet&, clang::OverloadedOperatorKind, clang::UnresolvedSetImpl const&, llvm::ArrayRef<clang::Expr*>, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x64a3b0a)
#31 0x00000000064b099b clang::Sema::CreateOverloadedBinOp(clang::SourceLocation, clang::BinaryOperatorKind, clang::UnresolvedSetImpl const&, clang::Expr*, clang::Expr*, bool, bool, clang::FunctionDecl*) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x64b099b)
#32 0x00000000060f87fe BuildOverloadedBinOp(clang::Sema&, clang::Scope*, clang::SourceLocation, clang::BinaryOperatorKind, clang::Expr*, clang::Expr*) SemaExpr.cpp:0:0
#33 0x000000000615ceb7 clang::Sema::BuildBinOp(clang::Scope*, clang::SourceLocation, clang::BinaryOperatorKind, clang::Expr*, clang::Expr*) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x615ceb7)
#34 0x000000000615d2d5 clang::Sema::ActOnBinOp(clang::Scope*, clang::SourceLocation, clang::tok::TokenKind, clang::Expr*, clang::Expr*) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x615d2d5)
#35 0x00000000064e6a17 clang::Sema::BuildCXXForRangeStmt(clang::SourceLocation, clang::SourceLocation, clang::Stmt*, clang::SourceLocation, clang::Stmt*, clang::Stmt*, clang::Stmt*, clang::Expr*, clang::Expr*, clang::Stmt*, clang::SourceLocation, clang::Sema::BuildForRangeKind) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x64e6a17)
#36 0x00000000066ddc01 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformCXXForRangeStmt(clang::CXXForRangeStmt*) SemaTemplateInstantiate.cpp:0:0
#37 0x00000000066de27b clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformCompoundStmt(clang::CompoundStmt*, bool) SemaTemplateInstantiate.cpp:0:0
#38 0x00000000066e233c clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformIfStmt(clang::IfStmt*) SemaTemplateInstantiate.cpp:0:0
#39 0x00000000066de27b clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformCompoundStmt(clang::CompoundStmt*, bool) SemaTemplateInstantiate.cpp:0:0
#40 0x00000000066e32b1 clang::Sema::SubstStmt(clang::Stmt*, clang::MultiLevelTemplateArgumentList const&) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x66e32b1)
#41 0x000000000672bd38 clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672bd38)
#42 0x000000000672a17f clang::Sema::PerformPendingInstantiations(bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672a17f)
#43 0x000000000672be4b clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672be4b)
#44 0x000000000672a17f clang::Sema::PerformPendingInstantiations(bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672a17f)
#45 0x000000000672beff clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672beff)
#46 0x000000000672a17f clang::Sema::PerformPendingInstantiations(bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672a17f)
#47 0x000000000672beff clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672beff)
#48 0x000000000672a17f clang::Sema::PerformPendingInstantiations(bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672a17f)
#49 0x000000000672beff clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672beff)
#50 0x000000000672a17f clang::Sema::PerformPendingInstantiations(bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672a17f)
#51 0x000000000672beff clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672beff)
#52 0x000000000672a17f clang::Sema::PerformPendingInstantiations(bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672a17f)
#53 0x000000000672beff clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672beff)
#54 0x000000000672a17f clang::Sema::PerformPendingInstantiations(bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672a17f)
#55 0x000000000672beff clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672beff)
#56 0x000000000672a17f clang::Sema::PerformPendingInstantiations(bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672a17f)
#57 0x0000000005d21a70 clang::Sema::ActOnEndOfTranslationUnitFragment(clang::Sema::TUFragmentKind) (.part.0) Sema.cpp:0:0
#58 0x0000000005d2213e clang::Sema::ActOnEndOfTranslationUnit() (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x5d2213e)
#59 0x0000000005ba7092 clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x5ba7092)
#60 0x0000000005b963ba clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x5b963ba)
#61 0x0000000003d5a725 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x3d5a725)
#62 0x0000000003fe2aa1 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x3fe2aa1)
#63 0x0000000003f6010b clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x3f6010b)
#64 0x00000000040c2473 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x40c2473)
#65 0x0000000000c19746 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0xc19746)
#66 0x0000000000c1211d ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#67 0x0000000003da1979 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
#68 0x0000000003467443 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x3467443)
#69 0x0000000003da1b99 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
#70 0x0000000003d69d17 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x3d69d17)
#71 0x0000000003d6a6cd clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x3d6a6cd)
#72 0x0000000003d7445c clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x3d7445c)
#73 0x0000000000c16a21 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0xc16a21)
#74 0x0000000000b0fa84 main (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0xb0fa84)
#75 0x000070661f629d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#76 0x000070661f629e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#77 0x0000000000c1191e _start (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0xc1191e)
clang++: error: clang frontend command failed with exit code 139 (use -v to see invocation)

I'm happy to provide more information if needed.
@EugeneZelenko EugeneZelenko added clang:frontend Language frontend issues, e.g. anything involving "Sema" crash Prefer [crash-on-valid] or [crash-on-invalid] and removed new issue labels Apr 30, 2024
@llvmbot
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llvmbot commented Apr 30, 2024

@llvm/issue-subscribers-clang-frontend

Author: mhx (mhx)

Apologies for not providing a shorter test case, but I came across this ICE while working on a project and `cvise` only managed to get the preprocessed output from 280k to 100kLOC. This is the code that reproduces the crash: [scanner-pp.cpp.gz](https://github.com/llvm/llvm-project/files/15171070/scanner-pp.cpp.gz) To reproduce: 
$ clang++-18 -std=c++20 -c scanner-pp.cpp

The code crashes just about every clang-18 I've tried (gentoo clang-18.1.4, ubuntu clang-18.1.2, every clang-18 / clang-trunk on compiler explorer). It compiles fine with clang-17.

Here's the stack trace from a run on compiler explorer:

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-18.1.0/bin/clang++ -gdwarf-4 -g -o /app/output.s -mllvm --x86-asm-syntax=intel -S --gcc-toolchain=/opt/compiler-explorer/gcc-13.2.0 -fcolor-diagnostics -fno-crash-diagnostics -std=c++20 &lt;source&gt;
1.	&lt;eof&gt; parser at end of file
2.	/usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:89286:23: instantiating function definition 'dwarfs::make_unique_logging_object&lt;dwarfs::scanner::impl, dwarfs::scanner_, std::tuple&lt;dwarfs::debug_logger_policy, dwarfs::prod_logger_policy&gt;, dwarfs::worker_group &amp;, std::shared_ptr&lt;dwarfs::segmenter_factory&gt;, std::shared_ptr&lt;dwarfs::entry_factory&gt;, std::shared_ptr&lt;const dwarfs::os_access&gt;, std::shared_ptr&lt;dwarfs::script&gt;, const dwarfs::scanner_options &amp;&gt;'
3.	/usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:89264:3: instantiating function definition 'dwarfs::logging_class_factory&lt;dwarfs::scanner_, dwarfs::unique_ptr_policy&lt;dwarfs::scanner::impl&gt;, std::tuple&lt;dwarfs::debug_logger_policy, dwarfs::prod_logger_policy&gt;, 2&gt;::create&lt;dwarfs::worker_group &amp;, std::shared_ptr&lt;dwarfs::segmenter_factory&gt;, std::shared_ptr&lt;dwarfs::entry_factory&gt;, std::shared_ptr&lt;const dwarfs::os_access&gt;, std::shared_ptr&lt;dwarfs::script&gt;, const dwarfs::scanner_options &amp;&gt;'
4.	/usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:89247:22: instantiating function definition 'dwarfs::unique_ptr_policy&lt;dwarfs::scanner::impl&gt;::create&lt;dwarfs::scanner_&lt;dwarfs::prod_logger_policy&gt;, dwarfs::logger &amp;, dwarfs::worker_group &amp;, std::shared_ptr&lt;dwarfs::segmenter_factory&gt;, std::shared_ptr&lt;dwarfs::entry_factory&gt;, std::shared_ptr&lt;const dwarfs::os_access&gt;, std::shared_ptr&lt;dwarfs::script&gt;, const dwarfs::scanner_options &amp;&gt;'
5.	/usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:27767:7: instantiating function definition 'std::unique_ptr&lt;dwarfs::scanner_&lt;dwarfs::prod_logger_policy&gt;&gt;::~unique_ptr'
6.	/usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:27611:7: instantiating function definition 'std::default_delete&lt;dwarfs::scanner_&lt;dwarfs::prod_logger_policy&gt;&gt;::operator()'
7.	/usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:99724:30: instantiating function definition 'dwarfs::scanner_&lt;dwarfs::prod_logger_policy&gt;::scan'
8.	/usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:53611:6: instantiating function definition 'dwarfs::queued_for_each&lt;dwarfs::sortable_span&lt;const std::shared_ptr&lt;dwarfs::inode&gt;, unsigned int&gt;, (lambda at /usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:99855:11), (lambda at /usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:99888:11)&gt;'
9.	/usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:99855:11: instantiating function definition 'dwarfs::scanner_&lt;dwarfs::prod_logger_policy&gt;::scan(filesystem_writer &amp;, const std::filesystem::path &amp;, progress &amp;, std::optional&lt;std::span&lt;const std::filesystem::path&gt;&gt;, std::shared_ptr&lt;const file_access&gt;)::(anonymous class)::operator()()::(anonymous class)::operator()&lt;std::shared_ptr&lt;dwarfs::inode&gt;&gt;'
 #<!-- -->0 0x000000000351ae38 llvm::sys::PrintStackTrace(llvm::raw_ostream&amp;, int) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x351ae38)
 #<!-- -->1 0x0000000003518f84 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x3518f84)
 #<!-- -->2 0x0000000003467018 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #<!-- -->3 0x000070661f642520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #<!-- -->4 0x000000000610f721 clang::Sema::tryCaptureVariable(clang::ValueDecl*, clang::SourceLocation, clang::Sema::TryCaptureKind, clang::SourceLocation, bool, clang::QualType&amp;, clang::QualType&amp;, unsigned int const*) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x610f721)
 #<!-- -->5 0x000000000613bbbd clang::Sema::BuildDeclRefExpr(clang::ValueDecl*, clang::QualType, clang::ExprValueKind, clang::DeclarationNameInfo const&amp;, clang::NestedNameSpecifierLoc, clang::NamedDecl*, clang::SourceLocation, clang::TemplateArgumentListInfo const*) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x613bbbd)
 #<!-- -->6 0x000000000613c23c clang::Sema::BuildDeclRefExpr(clang::ValueDecl*, clang::QualType, clang::ExprValueKind, clang::DeclarationNameInfo const&amp;, clang::CXXScopeSpec const*, clang::NamedDecl*, clang::SourceLocation, clang::TemplateArgumentListInfo const*) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x613c23c)
 #<!-- -->7 0x00000000061411f7 clang::Sema::BuildDeclarationNameExpr(clang::CXXScopeSpec const&amp;, clang::DeclarationNameInfo const&amp;, clang::NamedDecl*, clang::NamedDecl*, clang::TemplateArgumentListInfo const*, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x61411f7)
 #<!-- -->8 0x00000000066cf6f2 clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformDeclRefExpr(clang::DeclRefExpr*) SemaTemplateInstantiate.cpp:0:0
 #<!-- -->9 0x00000000066ad7fb clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#<!-- -->10 0x00000000066d04d5 clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformCXXDependentScopeMemberExpr(clang::CXXDependentScopeMemberExpr*) SemaTemplateInstantiate.cpp:0:0
#<!-- -->11 0x00000000066ad63f clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#<!-- -->12 0x00000000066b69e4 clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformCallExpr(clang::CallExpr*) SemaTemplateInstantiate.cpp:0:0
#<!-- -->13 0x00000000066ad70a clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#<!-- -->14 0x00000000066b853b clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformBinaryOperator(clang::BinaryOperator*) SemaTemplateInstantiate.cpp:0:0
#<!-- -->15 0x00000000066ad5c9 clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#<!-- -->16 0x00000000066d8acb clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformRequiresExpr(clang::RequiresExpr*) SemaTemplateInstantiate.cpp:0:0
#<!-- -->17 0x00000000066add36 clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#<!-- -->18 0x00000000066b8b6b clang::Sema::SubstConstraintExpr(clang::Expr*, clang::MultiLevelTemplateArgumentList const&amp;) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x66b8b6b)
#<!-- -->19 0x0000000005e64f91 calculateConstraintSatisfaction(clang::Sema&amp;, clang::NamedDecl const*, clang::SourceLocation, clang::MultiLevelTemplateArgumentList const&amp;, clang::Expr const*, clang::ConstraintSatisfaction&amp;)::'lambda'(clang::Expr const*)::operator()(clang::Expr const*) const SemaConcept.cpp:0:0
#<!-- -->20 0x0000000005e6638d clang::ActionResult&lt;clang::Expr*, true&gt; calculateConstraintSatisfaction&lt;calculateConstraintSatisfaction(clang::Sema&amp;, clang::NamedDecl const*, clang::SourceLocation, clang::MultiLevelTemplateArgumentList const&amp;, clang::Expr const*, clang::ConstraintSatisfaction&amp;)::'lambda'(clang::Expr const*)&gt;(clang::Sema&amp;, clang::Expr const*, clang::ConstraintSatisfaction&amp;, calculateConstraintSatisfaction(clang::Sema&amp;, clang::NamedDecl const*, clang::SourceLocation, clang::MultiLevelTemplateArgumentList const&amp;, clang::Expr const*, clang::ConstraintSatisfaction&amp;)::'lambda'(clang::Expr const*)&amp;&amp;) SemaConcept.cpp:0:0
#<!-- -->21 0x0000000005e66d08 CheckConstraintSatisfaction(clang::Sema&amp;, clang::NamedDecl const*, llvm::ArrayRef&lt;clang::Expr const*&gt;, llvm::SmallVectorImpl&lt;clang::Expr*&gt;&amp;, clang::MultiLevelTemplateArgumentList const&amp;, clang::SourceRange, clang::ConstraintSatisfaction&amp;) SemaConcept.cpp:0:0
#<!-- -->22 0x0000000005e672a8 clang::Sema::CheckConstraintSatisfaction(clang::NamedDecl const*, llvm::ArrayRef&lt;clang::Expr const*&gt;, llvm::SmallVectorImpl&lt;clang::Expr*&gt;&amp;, clang::MultiLevelTemplateArgumentList const&amp;, clang::SourceRange, clang::ConstraintSatisfaction&amp;) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x5e672a8)
#<!-- -->23 0x0000000005e67f1f clang::Sema::CheckInstantiatedFunctionTemplateConstraints(clang::SourceLocation, clang::FunctionDecl*, llvm::ArrayRef&lt;clang::TemplateArgument&gt;, clang::ConstraintSatisfaction&amp;) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x5e67f1f)
#<!-- -->24 0x000000000666f1ea clang::Sema::FinishTemplateArgumentDeduction(clang::FunctionTemplateDecl*, llvm::SmallVectorImpl&lt;clang::DeducedTemplateArgument&gt;&amp;, unsigned int, clang::FunctionDecl*&amp;, clang::sema::TemplateDeductionInfo&amp;, llvm::SmallVectorImpl&lt;clang::Sema::OriginalCallArg&gt; const*, bool, llvm::function_ref&lt;bool ()&gt;) (.constprop.0) SemaTemplateDeduction.cpp:0:0
#<!-- -->25 0x000000000666fd0a void llvm::function_ref&lt;void ()&gt;::callback_fn&lt;clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, clang::TemplateArgumentListInfo*, llvm::ArrayRef&lt;clang::Expr*&gt;, clang::FunctionDecl*&amp;, clang::sema::TemplateDeductionInfo&amp;, bool, bool, clang::QualType, clang::Expr::Classification, llvm::function_ref&lt;bool (llvm::ArrayRef&lt;clang::QualType&gt;)&gt;)::'lambda1'()&gt;(long) SemaTemplateDeduction.cpp:0:0
#<!-- -->26 0x0000000005cff961 clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref&lt;void ()&gt;) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x5cff961)
#<!-- -->27 0x000000000668554a clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, clang::TemplateArgumentListInfo*, llvm::ArrayRef&lt;clang::Expr*&gt;, clang::FunctionDecl*&amp;, clang::sema::TemplateDeductionInfo&amp;, bool, bool, clang::QualType, clang::Expr::Classification, llvm::function_ref&lt;bool (llvm::ArrayRef&lt;clang::QualType&gt;)&gt;) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x668554a)
#<!-- -->28 0x00000000064a057a clang::Sema::AddTemplateOverloadCandidate(clang::FunctionTemplateDecl*, clang::DeclAccessPair, clang::TemplateArgumentListInfo*, llvm::ArrayRef&lt;clang::Expr*&gt;, clang::OverloadCandidateSet&amp;, bool, bool, bool, clang::CallExpr::ADLCallKind, clang::OverloadCandidateParamOrder, bool) (.constprop.1) SemaOverload.cpp:0:0
#<!-- -->29 0x00000000064a1336 clang::Sema::AddArgumentDependentLookupCandidates(clang::DeclarationName, clang::SourceLocation, llvm::ArrayRef&lt;clang::Expr*&gt;, clang::TemplateArgumentListInfo*, clang::OverloadCandidateSet&amp;, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x64a1336)
#<!-- -->30 0x00000000064a3b0a clang::Sema::LookupOverloadedBinOp(clang::OverloadCandidateSet&amp;, clang::OverloadedOperatorKind, clang::UnresolvedSetImpl const&amp;, llvm::ArrayRef&lt;clang::Expr*&gt;, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x64a3b0a)
#<!-- -->31 0x00000000064b099b clang::Sema::CreateOverloadedBinOp(clang::SourceLocation, clang::BinaryOperatorKind, clang::UnresolvedSetImpl const&amp;, clang::Expr*, clang::Expr*, bool, bool, clang::FunctionDecl*) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x64b099b)
#<!-- -->32 0x00000000060f87fe BuildOverloadedBinOp(clang::Sema&amp;, clang::Scope*, clang::SourceLocation, clang::BinaryOperatorKind, clang::Expr*, clang::Expr*) SemaExpr.cpp:0:0
#<!-- -->33 0x000000000615ceb7 clang::Sema::BuildBinOp(clang::Scope*, clang::SourceLocation, clang::BinaryOperatorKind, clang::Expr*, clang::Expr*) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x615ceb7)
#<!-- -->34 0x000000000615d2d5 clang::Sema::ActOnBinOp(clang::Scope*, clang::SourceLocation, clang::tok::TokenKind, clang::Expr*, clang::Expr*) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x615d2d5)
#<!-- -->35 0x00000000064e6a17 clang::Sema::BuildCXXForRangeStmt(clang::SourceLocation, clang::SourceLocation, clang::Stmt*, clang::SourceLocation, clang::Stmt*, clang::Stmt*, clang::Stmt*, clang::Expr*, clang::Expr*, clang::Stmt*, clang::SourceLocation, clang::Sema::BuildForRangeKind) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x64e6a17)
#<!-- -->36 0x00000000066ddc01 clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformCXXForRangeStmt(clang::CXXForRangeStmt*) SemaTemplateInstantiate.cpp:0:0
#<!-- -->37 0x00000000066de27b clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformCompoundStmt(clang::CompoundStmt*, bool) SemaTemplateInstantiate.cpp:0:0
#<!-- -->38 0x00000000066e233c clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformIfStmt(clang::IfStmt*) SemaTemplateInstantiate.cpp:0:0
#<!-- -->39 0x00000000066de27b clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformCompoundStmt(clang::CompoundStmt*, bool) SemaTemplateInstantiate.cpp:0:0
#<!-- -->40 0x00000000066e32b1 clang::Sema::SubstStmt(clang::Stmt*, clang::MultiLevelTemplateArgumentList const&amp;) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x66e32b1)
#<!-- -->41 0x000000000672bd38 clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672bd38)
#<!-- -->42 0x000000000672a17f clang::Sema::PerformPendingInstantiations(bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672a17f)
#<!-- -->43 0x000000000672be4b clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672be4b)
#<!-- -->44 0x000000000672a17f clang::Sema::PerformPendingInstantiations(bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672a17f)
#<!-- -->45 0x000000000672beff clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672beff)
#<!-- -->46 0x000000000672a17f clang::Sema::PerformPendingInstantiations(bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672a17f)
#<!-- -->47 0x000000000672beff clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672beff)
#<!-- -->48 0x000000000672a17f clang::Sema::PerformPendingInstantiations(bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672a17f)
#<!-- -->49 0x000000000672beff clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672beff)
#<!-- -->50 0x000000000672a17f clang::Sema::PerformPendingInstantiations(bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672a17f)
#<!-- -->51 0x000000000672beff clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672beff)
#<!-- -->52 0x000000000672a17f clang::Sema::PerformPendingInstantiations(bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672a17f)
#<!-- -->53 0x000000000672beff clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672beff)
#<!-- -->54 0x000000000672a17f clang::Sema::PerformPendingInstantiations(bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672a17f)
#<!-- -->55 0x000000000672beff clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672beff)
#<!-- -->56 0x000000000672a17f clang::Sema::PerformPendingInstantiations(bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672a17f)
#<!-- -->57 0x0000000005d21a70 clang::Sema::ActOnEndOfTranslationUnitFragment(clang::Sema::TUFragmentKind) (.part.0) Sema.cpp:0:0
#<!-- -->58 0x0000000005d2213e clang::Sema::ActOnEndOfTranslationUnit() (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x5d2213e)
#<!-- -->59 0x0000000005ba7092 clang::Parser::ParseTopLevelDecl(clang::OpaquePtr&lt;clang::DeclGroupRef&gt;&amp;, clang::Sema::ModuleImportState&amp;) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x5ba7092)
#<!-- -->60 0x0000000005b963ba clang::ParseAST(clang::Sema&amp;, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x5b963ba)
#<!-- -->61 0x0000000003d5a725 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x3d5a725)
#<!-- -->62 0x0000000003fe2aa1 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x3fe2aa1)
#<!-- -->63 0x0000000003f6010b clang::CompilerInstance::ExecuteAction(clang::FrontendAction&amp;) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x3f6010b)
#<!-- -->64 0x00000000040c2473 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x40c2473)
#<!-- -->65 0x0000000000c19746 cc1_main(llvm::ArrayRef&lt;char const*&gt;, char const*, void*) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0xc19746)
#<!-- -->66 0x0000000000c1211d ExecuteCC1Tool(llvm::SmallVectorImpl&lt;char const*&gt;&amp;, llvm::ToolContext const&amp;) driver.cpp:0:0
#<!-- -->67 0x0000000003da1979 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
#<!-- -->68 0x0000000003467443 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref&lt;void ()&gt;) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x3467443)
#<!-- -->69 0x0000000003da1b99 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
#<!-- -->70 0x0000000003d69d17 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&amp;, clang::driver::Command const*&amp;, bool) const (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x3d69d17)
#<!-- -->71 0x0000000003d6a6cd 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-18.1.0/bin/clang+++0x3d6a6cd)
#<!-- -->72 0x0000000003d7445c 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-18.1.0/bin/clang+++0x3d7445c)
#<!-- -->73 0x0000000000c16a21 clang_main(int, char**, llvm::ToolContext const&amp;) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0xc16a21)
#<!-- -->74 0x0000000000b0fa84 main (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0xb0fa84)
#<!-- -->75 0x000070661f629d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#<!-- -->76 0x000070661f629e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#<!-- -->77 0x0000000000c1191e _start (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0xc1191e)
clang++: error: clang frontend command failed with exit code 139 (use -v to see invocation)

I'm happy to provide more information if needed.

@shafik shafik added the needs-reduction Large reproducer that should be reduced into a simpler form label Apr 30, 2024
@shafik shafik changed the title clang-18 frontend segfault clang-18 frontend segfault (tryCaptureVariable) Apr 30, 2024
@shafik shafik added the confirmed Verified by a second party label Apr 30, 2024
@zyn0217
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zyn0217 commented Apr 30, 2024

#78598

@zyn0217 zyn0217 added c++20 concepts C++20 concepts labels Apr 30, 2024
@llvmbot
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llvmbot commented Apr 30, 2024

@llvm/issue-subscribers-c-20

Author: mhx (mhx)

Apologies for not providing a shorter test case, but I came across this ICE while working on a project and `cvise` only managed to get the preprocessed output from 280k to 100kLOC. This is the code that reproduces the crash: [scanner-pp.cpp.gz](https://github.com/llvm/llvm-project/files/15171070/scanner-pp.cpp.gz) To reproduce: 
$ clang++-18 -std=c++20 -c scanner-pp.cpp

The code crashes just about every clang-18 I've tried (gentoo clang-18.1.4, ubuntu clang-18.1.2, every clang-18 / clang-trunk on compiler explorer). It compiles fine with clang-17.

Here's the stack trace from a run on compiler explorer:

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-18.1.0/bin/clang++ -gdwarf-4 -g -o /app/output.s -mllvm --x86-asm-syntax=intel -S --gcc-toolchain=/opt/compiler-explorer/gcc-13.2.0 -fcolor-diagnostics -fno-crash-diagnostics -std=c++20 &lt;source&gt;
1.	&lt;eof&gt; parser at end of file
2.	/usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:89286:23: instantiating function definition 'dwarfs::make_unique_logging_object&lt;dwarfs::scanner::impl, dwarfs::scanner_, std::tuple&lt;dwarfs::debug_logger_policy, dwarfs::prod_logger_policy&gt;, dwarfs::worker_group &amp;, std::shared_ptr&lt;dwarfs::segmenter_factory&gt;, std::shared_ptr&lt;dwarfs::entry_factory&gt;, std::shared_ptr&lt;const dwarfs::os_access&gt;, std::shared_ptr&lt;dwarfs::script&gt;, const dwarfs::scanner_options &amp;&gt;'
3.	/usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:89264:3: instantiating function definition 'dwarfs::logging_class_factory&lt;dwarfs::scanner_, dwarfs::unique_ptr_policy&lt;dwarfs::scanner::impl&gt;, std::tuple&lt;dwarfs::debug_logger_policy, dwarfs::prod_logger_policy&gt;, 2&gt;::create&lt;dwarfs::worker_group &amp;, std::shared_ptr&lt;dwarfs::segmenter_factory&gt;, std::shared_ptr&lt;dwarfs::entry_factory&gt;, std::shared_ptr&lt;const dwarfs::os_access&gt;, std::shared_ptr&lt;dwarfs::script&gt;, const dwarfs::scanner_options &amp;&gt;'
4.	/usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:89247:22: instantiating function definition 'dwarfs::unique_ptr_policy&lt;dwarfs::scanner::impl&gt;::create&lt;dwarfs::scanner_&lt;dwarfs::prod_logger_policy&gt;, dwarfs::logger &amp;, dwarfs::worker_group &amp;, std::shared_ptr&lt;dwarfs::segmenter_factory&gt;, std::shared_ptr&lt;dwarfs::entry_factory&gt;, std::shared_ptr&lt;const dwarfs::os_access&gt;, std::shared_ptr&lt;dwarfs::script&gt;, const dwarfs::scanner_options &amp;&gt;'
5.	/usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:27767:7: instantiating function definition 'std::unique_ptr&lt;dwarfs::scanner_&lt;dwarfs::prod_logger_policy&gt;&gt;::~unique_ptr'
6.	/usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:27611:7: instantiating function definition 'std::default_delete&lt;dwarfs::scanner_&lt;dwarfs::prod_logger_policy&gt;&gt;::operator()'
7.	/usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:99724:30: instantiating function definition 'dwarfs::scanner_&lt;dwarfs::prod_logger_policy&gt;::scan'
8.	/usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:53611:6: instantiating function definition 'dwarfs::queued_for_each&lt;dwarfs::sortable_span&lt;const std::shared_ptr&lt;dwarfs::inode&gt;, unsigned int&gt;, (lambda at /usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:99855:11), (lambda at /usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:99888:11)&gt;'
9.	/usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13/type_traits:99855:11: instantiating function definition 'dwarfs::scanner_&lt;dwarfs::prod_logger_policy&gt;::scan(filesystem_writer &amp;, const std::filesystem::path &amp;, progress &amp;, std::optional&lt;std::span&lt;const std::filesystem::path&gt;&gt;, std::shared_ptr&lt;const file_access&gt;)::(anonymous class)::operator()()::(anonymous class)::operator()&lt;std::shared_ptr&lt;dwarfs::inode&gt;&gt;'
 #<!-- -->0 0x000000000351ae38 llvm::sys::PrintStackTrace(llvm::raw_ostream&amp;, int) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x351ae38)
 #<!-- -->1 0x0000000003518f84 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x3518f84)
 #<!-- -->2 0x0000000003467018 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #<!-- -->3 0x000070661f642520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #<!-- -->4 0x000000000610f721 clang::Sema::tryCaptureVariable(clang::ValueDecl*, clang::SourceLocation, clang::Sema::TryCaptureKind, clang::SourceLocation, bool, clang::QualType&amp;, clang::QualType&amp;, unsigned int const*) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x610f721)
 #<!-- -->5 0x000000000613bbbd clang::Sema::BuildDeclRefExpr(clang::ValueDecl*, clang::QualType, clang::ExprValueKind, clang::DeclarationNameInfo const&amp;, clang::NestedNameSpecifierLoc, clang::NamedDecl*, clang::SourceLocation, clang::TemplateArgumentListInfo const*) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x613bbbd)
 #<!-- -->6 0x000000000613c23c clang::Sema::BuildDeclRefExpr(clang::ValueDecl*, clang::QualType, clang::ExprValueKind, clang::DeclarationNameInfo const&amp;, clang::CXXScopeSpec const*, clang::NamedDecl*, clang::SourceLocation, clang::TemplateArgumentListInfo const*) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x613c23c)
 #<!-- -->7 0x00000000061411f7 clang::Sema::BuildDeclarationNameExpr(clang::CXXScopeSpec const&amp;, clang::DeclarationNameInfo const&amp;, clang::NamedDecl*, clang::NamedDecl*, clang::TemplateArgumentListInfo const*, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x61411f7)
 #<!-- -->8 0x00000000066cf6f2 clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformDeclRefExpr(clang::DeclRefExpr*) SemaTemplateInstantiate.cpp:0:0
 #<!-- -->9 0x00000000066ad7fb clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#<!-- -->10 0x00000000066d04d5 clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformCXXDependentScopeMemberExpr(clang::CXXDependentScopeMemberExpr*) SemaTemplateInstantiate.cpp:0:0
#<!-- -->11 0x00000000066ad63f clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#<!-- -->12 0x00000000066b69e4 clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformCallExpr(clang::CallExpr*) SemaTemplateInstantiate.cpp:0:0
#<!-- -->13 0x00000000066ad70a clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#<!-- -->14 0x00000000066b853b clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformBinaryOperator(clang::BinaryOperator*) SemaTemplateInstantiate.cpp:0:0
#<!-- -->15 0x00000000066ad5c9 clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#<!-- -->16 0x00000000066d8acb clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformRequiresExpr(clang::RequiresExpr*) SemaTemplateInstantiate.cpp:0:0
#<!-- -->17 0x00000000066add36 clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#<!-- -->18 0x00000000066b8b6b clang::Sema::SubstConstraintExpr(clang::Expr*, clang::MultiLevelTemplateArgumentList const&amp;) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x66b8b6b)
#<!-- -->19 0x0000000005e64f91 calculateConstraintSatisfaction(clang::Sema&amp;, clang::NamedDecl const*, clang::SourceLocation, clang::MultiLevelTemplateArgumentList const&amp;, clang::Expr const*, clang::ConstraintSatisfaction&amp;)::'lambda'(clang::Expr const*)::operator()(clang::Expr const*) const SemaConcept.cpp:0:0
#<!-- -->20 0x0000000005e6638d clang::ActionResult&lt;clang::Expr*, true&gt; calculateConstraintSatisfaction&lt;calculateConstraintSatisfaction(clang::Sema&amp;, clang::NamedDecl const*, clang::SourceLocation, clang::MultiLevelTemplateArgumentList const&amp;, clang::Expr const*, clang::ConstraintSatisfaction&amp;)::'lambda'(clang::Expr const*)&gt;(clang::Sema&amp;, clang::Expr const*, clang::ConstraintSatisfaction&amp;, calculateConstraintSatisfaction(clang::Sema&amp;, clang::NamedDecl const*, clang::SourceLocation, clang::MultiLevelTemplateArgumentList const&amp;, clang::Expr const*, clang::ConstraintSatisfaction&amp;)::'lambda'(clang::Expr const*)&amp;&amp;) SemaConcept.cpp:0:0
#<!-- -->21 0x0000000005e66d08 CheckConstraintSatisfaction(clang::Sema&amp;, clang::NamedDecl const*, llvm::ArrayRef&lt;clang::Expr const*&gt;, llvm::SmallVectorImpl&lt;clang::Expr*&gt;&amp;, clang::MultiLevelTemplateArgumentList const&amp;, clang::SourceRange, clang::ConstraintSatisfaction&amp;) SemaConcept.cpp:0:0
#<!-- -->22 0x0000000005e672a8 clang::Sema::CheckConstraintSatisfaction(clang::NamedDecl const*, llvm::ArrayRef&lt;clang::Expr const*&gt;, llvm::SmallVectorImpl&lt;clang::Expr*&gt;&amp;, clang::MultiLevelTemplateArgumentList const&amp;, clang::SourceRange, clang::ConstraintSatisfaction&amp;) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x5e672a8)
#<!-- -->23 0x0000000005e67f1f clang::Sema::CheckInstantiatedFunctionTemplateConstraints(clang::SourceLocation, clang::FunctionDecl*, llvm::ArrayRef&lt;clang::TemplateArgument&gt;, clang::ConstraintSatisfaction&amp;) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x5e67f1f)
#<!-- -->24 0x000000000666f1ea clang::Sema::FinishTemplateArgumentDeduction(clang::FunctionTemplateDecl*, llvm::SmallVectorImpl&lt;clang::DeducedTemplateArgument&gt;&amp;, unsigned int, clang::FunctionDecl*&amp;, clang::sema::TemplateDeductionInfo&amp;, llvm::SmallVectorImpl&lt;clang::Sema::OriginalCallArg&gt; const*, bool, llvm::function_ref&lt;bool ()&gt;) (.constprop.0) SemaTemplateDeduction.cpp:0:0
#<!-- -->25 0x000000000666fd0a void llvm::function_ref&lt;void ()&gt;::callback_fn&lt;clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, clang::TemplateArgumentListInfo*, llvm::ArrayRef&lt;clang::Expr*&gt;, clang::FunctionDecl*&amp;, clang::sema::TemplateDeductionInfo&amp;, bool, bool, clang::QualType, clang::Expr::Classification, llvm::function_ref&lt;bool (llvm::ArrayRef&lt;clang::QualType&gt;)&gt;)::'lambda1'()&gt;(long) SemaTemplateDeduction.cpp:0:0
#<!-- -->26 0x0000000005cff961 clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref&lt;void ()&gt;) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x5cff961)
#<!-- -->27 0x000000000668554a clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, clang::TemplateArgumentListInfo*, llvm::ArrayRef&lt;clang::Expr*&gt;, clang::FunctionDecl*&amp;, clang::sema::TemplateDeductionInfo&amp;, bool, bool, clang::QualType, clang::Expr::Classification, llvm::function_ref&lt;bool (llvm::ArrayRef&lt;clang::QualType&gt;)&gt;) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x668554a)
#<!-- -->28 0x00000000064a057a clang::Sema::AddTemplateOverloadCandidate(clang::FunctionTemplateDecl*, clang::DeclAccessPair, clang::TemplateArgumentListInfo*, llvm::ArrayRef&lt;clang::Expr*&gt;, clang::OverloadCandidateSet&amp;, bool, bool, bool, clang::CallExpr::ADLCallKind, clang::OverloadCandidateParamOrder, bool) (.constprop.1) SemaOverload.cpp:0:0
#<!-- -->29 0x00000000064a1336 clang::Sema::AddArgumentDependentLookupCandidates(clang::DeclarationName, clang::SourceLocation, llvm::ArrayRef&lt;clang::Expr*&gt;, clang::TemplateArgumentListInfo*, clang::OverloadCandidateSet&amp;, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x64a1336)
#<!-- -->30 0x00000000064a3b0a clang::Sema::LookupOverloadedBinOp(clang::OverloadCandidateSet&amp;, clang::OverloadedOperatorKind, clang::UnresolvedSetImpl const&amp;, llvm::ArrayRef&lt;clang::Expr*&gt;, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x64a3b0a)
#<!-- -->31 0x00000000064b099b clang::Sema::CreateOverloadedBinOp(clang::SourceLocation, clang::BinaryOperatorKind, clang::UnresolvedSetImpl const&amp;, clang::Expr*, clang::Expr*, bool, bool, clang::FunctionDecl*) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x64b099b)
#<!-- -->32 0x00000000060f87fe BuildOverloadedBinOp(clang::Sema&amp;, clang::Scope*, clang::SourceLocation, clang::BinaryOperatorKind, clang::Expr*, clang::Expr*) SemaExpr.cpp:0:0
#<!-- -->33 0x000000000615ceb7 clang::Sema::BuildBinOp(clang::Scope*, clang::SourceLocation, clang::BinaryOperatorKind, clang::Expr*, clang::Expr*) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x615ceb7)
#<!-- -->34 0x000000000615d2d5 clang::Sema::ActOnBinOp(clang::Scope*, clang::SourceLocation, clang::tok::TokenKind, clang::Expr*, clang::Expr*) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x615d2d5)
#<!-- -->35 0x00000000064e6a17 clang::Sema::BuildCXXForRangeStmt(clang::SourceLocation, clang::SourceLocation, clang::Stmt*, clang::SourceLocation, clang::Stmt*, clang::Stmt*, clang::Stmt*, clang::Expr*, clang::Expr*, clang::Stmt*, clang::SourceLocation, clang::Sema::BuildForRangeKind) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x64e6a17)
#<!-- -->36 0x00000000066ddc01 clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformCXXForRangeStmt(clang::CXXForRangeStmt*) SemaTemplateInstantiate.cpp:0:0
#<!-- -->37 0x00000000066de27b clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformCompoundStmt(clang::CompoundStmt*, bool) SemaTemplateInstantiate.cpp:0:0
#<!-- -->38 0x00000000066e233c clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformIfStmt(clang::IfStmt*) SemaTemplateInstantiate.cpp:0:0
#<!-- -->39 0x00000000066de27b clang::TreeTransform&lt;(anonymous namespace)::TemplateInstantiator&gt;::TransformCompoundStmt(clang::CompoundStmt*, bool) SemaTemplateInstantiate.cpp:0:0
#<!-- -->40 0x00000000066e32b1 clang::Sema::SubstStmt(clang::Stmt*, clang::MultiLevelTemplateArgumentList const&amp;) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x66e32b1)
#<!-- -->41 0x000000000672bd38 clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672bd38)
#<!-- -->42 0x000000000672a17f clang::Sema::PerformPendingInstantiations(bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672a17f)
#<!-- -->43 0x000000000672be4b clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672be4b)
#<!-- -->44 0x000000000672a17f clang::Sema::PerformPendingInstantiations(bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672a17f)
#<!-- -->45 0x000000000672beff clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672beff)
#<!-- -->46 0x000000000672a17f clang::Sema::PerformPendingInstantiations(bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672a17f)
#<!-- -->47 0x000000000672beff clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672beff)
#<!-- -->48 0x000000000672a17f clang::Sema::PerformPendingInstantiations(bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672a17f)
#<!-- -->49 0x000000000672beff clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672beff)
#<!-- -->50 0x000000000672a17f clang::Sema::PerformPendingInstantiations(bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672a17f)
#<!-- -->51 0x000000000672beff clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672beff)
#<!-- -->52 0x000000000672a17f clang::Sema::PerformPendingInstantiations(bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672a17f)
#<!-- -->53 0x000000000672beff clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672beff)
#<!-- -->54 0x000000000672a17f clang::Sema::PerformPendingInstantiations(bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672a17f)
#<!-- -->55 0x000000000672beff clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672beff)
#<!-- -->56 0x000000000672a17f clang::Sema::PerformPendingInstantiations(bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x672a17f)
#<!-- -->57 0x0000000005d21a70 clang::Sema::ActOnEndOfTranslationUnitFragment(clang::Sema::TUFragmentKind) (.part.0) Sema.cpp:0:0
#<!-- -->58 0x0000000005d2213e clang::Sema::ActOnEndOfTranslationUnit() (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x5d2213e)
#<!-- -->59 0x0000000005ba7092 clang::Parser::ParseTopLevelDecl(clang::OpaquePtr&lt;clang::DeclGroupRef&gt;&amp;, clang::Sema::ModuleImportState&amp;) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x5ba7092)
#<!-- -->60 0x0000000005b963ba clang::ParseAST(clang::Sema&amp;, bool, bool) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x5b963ba)
#<!-- -->61 0x0000000003d5a725 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x3d5a725)
#<!-- -->62 0x0000000003fe2aa1 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x3fe2aa1)
#<!-- -->63 0x0000000003f6010b clang::CompilerInstance::ExecuteAction(clang::FrontendAction&amp;) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x3f6010b)
#<!-- -->64 0x00000000040c2473 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x40c2473)
#<!-- -->65 0x0000000000c19746 cc1_main(llvm::ArrayRef&lt;char const*&gt;, char const*, void*) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0xc19746)
#<!-- -->66 0x0000000000c1211d ExecuteCC1Tool(llvm::SmallVectorImpl&lt;char const*&gt;&amp;, llvm::ToolContext const&amp;) driver.cpp:0:0
#<!-- -->67 0x0000000003da1979 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
#<!-- -->68 0x0000000003467443 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref&lt;void ()&gt;) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x3467443)
#<!-- -->69 0x0000000003da1b99 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
#<!-- -->70 0x0000000003d69d17 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&amp;, clang::driver::Command const*&amp;, bool) const (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0x3d69d17)
#<!-- -->71 0x0000000003d6a6cd 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-18.1.0/bin/clang+++0x3d6a6cd)
#<!-- -->72 0x0000000003d7445c 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-18.1.0/bin/clang+++0x3d7445c)
#<!-- -->73 0x0000000000c16a21 clang_main(int, char**, llvm::ToolContext const&amp;) (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0xc16a21)
#<!-- -->74 0x0000000000b0fa84 main (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0xb0fa84)
#<!-- -->75 0x000070661f629d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#<!-- -->76 0x000070661f629e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#<!-- -->77 0x0000000000c1191e _start (/opt/compiler-explorer/clang-18.1.0/bin/clang+++0xc1191e)
clang++: error: clang frontend command failed with exit code 139 (use -v to see invocation)

I'm happy to provide more information if needed.

@Endilll
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Endilll commented May 5, 2024

Confirmed on 19.0 (trunk): https://godbolt.org/z/4jn36W86E
Reduced by me and C-Reduce:

struct __normal_iterator {};

struct vector {
  __normal_iterator begin();
  int end();
};

template<typename _IteratorR>
bool operator==(_IteratorR __lhs, int) requires requires { __lhs; } {}

template <typename PrepareFunc>
void queued_for_each(PrepareFunc prep) {
  prep(vector{});
}

void scan() {
  queued_for_each(
    [&](auto ino) -> int {
      for (auto e : ino) {};
    }
  );
}

Clang 19.0 stack trace:

clang++: /root/llvm-project/llvm/include/llvm/ADT/SmallVector.h:304:
T& llvm::SmallVectorTemplateCommon<T, <template-parameter-1-2> >::operator[](llvm::SmallVectorTemplateCommon<T, <template-parameter-1-2> >::size_type) [with T = clang::sema::FunctionScopeInfo*; <template-parameter-1-2> = void; llvm::SmallVectorTemplateCommon<T, <template-parameter-1-2> >::reference = clang::sema::FunctionScopeInfo*&; llvm::SmallVectorTemplateCommon<T, <template-parameter-1-2> >::size_type = long unsigned int]:
Assertion `idx < size()' failed.

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-assertions-trunk/bin/clang++ -gdwarf-4 -g -o /app/output.s -mllvm --x86-asm-syntax=intel -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.	<source>:12:6: instantiating function definition 'queued_for_each<(lambda at <source>:18:5)>'
3.	<source>:18:5: instantiating function definition 'scan()::(anonymous class)::operator()<vector>'
 #0 0x0000000003979978 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3979978)
 #1 0x000000000397765c llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x397765c)
 #2 0x00000000038c9018 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x00007d5435e42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x00007d5435e969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #5 0x00007d5435e42476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #6 0x00007d5435e287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #7 0x00007d5435e2871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
 #8 0x00007d5435e39e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
 #9 0x0000000006815f08 clang::Sema::tryCaptureVariable(clang::ValueDecl*, clang::SourceLocation, clang::Sema::TryCaptureKind, clang::SourceLocation, bool, clang::QualType&, clang::QualType&, unsigned int const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6815f08)
#10 0x0000000006843816 clang::Sema::BuildDeclRefExpr(clang::ValueDecl*, clang::QualType, clang::ExprValueKind, clang::DeclarationNameInfo const&, clang::NestedNameSpecifierLoc, clang::NamedDecl*, clang::SourceLocation, clang::TemplateArgumentListInfo const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6843816)
#11 0x000000000684406f clang::Sema::BuildDeclRefExpr(clang::ValueDecl*, clang::QualType, clang::ExprValueKind, clang::DeclarationNameInfo const&, clang::CXXScopeSpec const*, clang::NamedDecl*, clang::SourceLocation, clang::TemplateArgumentListInfo const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x684406f)
#12 0x000000000684a354 clang::Sema::BuildDeclarationNameExpr(clang::CXXScopeSpec const&, clang::DeclarationNameInfo const&, clang::NamedDecl*, clang::NamedDecl*, clang::TemplateArgumentListInfo const*, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x684a354)
#13 0x0000000006e8a662 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformDeclRefExpr(clang::DeclRefExpr*) SemaTemplateInstantiate.cpp:0:0
#14 0x0000000006e8a86b (anonymous namespace)::TemplateInstantiator::TransformDeclRefExpr(clang::DeclRefExpr*) SemaTemplateInstantiate.cpp:0:0
#15 0x0000000006e64e24 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#16 0x0000000006e90bee clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformRequiresExpr(clang::RequiresExpr*) SemaTemplateInstantiate.cpp:0:0
#17 0x0000000006e92a1e (anonymous namespace)::TemplateInstantiator::TransformRequiresExpr(clang::RequiresExpr*) SemaTemplateInstantiate.cpp:0:0
#18 0x0000000006e65229 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#19 0x0000000006e9b394 clang::Sema::SubstConstraintExpr(clang::Expr*, clang::MultiLevelTemplateArgumentList const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6e9b394)
#20 0x000000000655d633 calculateConstraintSatisfaction(clang::Sema&, clang::NamedDecl const*, clang::SourceLocation, clang::MultiLevelTemplateArgumentList const&, clang::Expr const*, clang::ConstraintSatisfaction&)::'lambda'(clang::Expr const*)::operator()(clang::Expr const*) const SemaConcept.cpp:0:0
#21 0x000000000655eeeb clang::ActionResult<clang::Expr*, true> calculateConstraintSatisfaction<calculateConstraintSatisfaction(clang::Sema&, clang::NamedDecl const*, clang::SourceLocation, clang::MultiLevelTemplateArgumentList const&, clang::Expr const*, clang::ConstraintSatisfaction&)::'lambda'(clang::Expr const*)>(clang::Sema&, clang::Expr const*, clang::ConstraintSatisfaction&, calculateConstraintSatisfaction(clang::Sema&, clang::NamedDecl const*, clang::SourceLocation, clang::MultiLevelTemplateArgumentList const&, clang::Expr const*, clang::ConstraintSatisfaction&)::'lambda'(clang::Expr const*)&&) SemaConcept.cpp:0:0
#22 0x000000000655f852 CheckConstraintSatisfaction(clang::Sema&, clang::NamedDecl const*, llvm::ArrayRef<clang::Expr const*>, llvm::SmallVectorImpl<clang::Expr*>&, clang::MultiLevelTemplateArgumentList const&, clang::SourceRange, clang::ConstraintSatisfaction&) SemaConcept.cpp:0:0
#23 0x000000000655fe8a clang::Sema::CheckConstraintSatisfaction(clang::NamedDecl const*, llvm::ArrayRef<clang::Expr const*>, llvm::SmallVectorImpl<clang::Expr*>&, clang::MultiLevelTemplateArgumentList const&, clang::SourceRange, clang::ConstraintSatisfaction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x655fe8a)
#24 0x0000000006560f4b clang::Sema::CheckInstantiatedFunctionTemplateConstraints(clang::SourceLocation, clang::FunctionDecl*, llvm::ArrayRef<clang::TemplateArgument>, clang::ConstraintSatisfaction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6560f4b)
#25 0x0000000006e239f7 clang::Sema::FinishTemplateArgumentDeduction(clang::FunctionTemplateDecl*, llvm::SmallVectorImpl<clang::DeducedTemplateArgument>&, unsigned int, clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, llvm::SmallVectorImpl<clang::Sema::OriginalCallArg> const*, bool, llvm::function_ref<bool ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6e239f7)
#26 0x0000000006e2518a void llvm::function_ref<void ()>::callback_fn<clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, bool, bool, clang::QualType, clang::Expr::Classification, llvm::function_ref<bool (llvm::ArrayRef<clang::QualType>)>)::'lambda1'()>(long) SemaTemplateDeduction.cpp:0:0
#27 0x00000000063f4431 clang::Sema::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x63f4431)
#28 0x0000000006e2f9f2 clang::Sema::DeduceTemplateArguments(clang::FunctionTemplateDecl*, clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, clang::FunctionDecl*&, clang::sema::TemplateDeductionInfo&, bool, bool, clang::QualType, clang::Expr::Classification, llvm::function_ref<bool (llvm::ArrayRef<clang::QualType>)>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6e2f9f2)
#29 0x0000000006c11438 clang::Sema::AddTemplateOverloadCandidate(clang::FunctionTemplateDecl*, clang::DeclAccessPair, clang::TemplateArgumentListInfo*, llvm::ArrayRef<clang::Expr*>, clang::OverloadCandidateSet&, bool, bool, bool, clang::CallExpr::ADLCallKind, clang::OverloadCandidateParamOrder, bool) (.constprop.1) SemaOverload.cpp:0:0
#30 0x0000000006c1182d clang::Sema::AddNonMemberOperatorCandidates(clang::UnresolvedSetImpl const&, llvm::ArrayRef<clang::Expr*>, clang::OverloadCandidateSet&, clang::TemplateArgumentListInfo*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6c1182d)
#31 0x0000000006c1448c clang::Sema::LookupOverloadedBinOp(clang::OverloadCandidateSet&, clang::OverloadedOperatorKind, clang::UnresolvedSetImpl const&, llvm::ArrayRef<clang::Expr*>, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6c1448c)
#32 0x0000000006c20378 clang::Sema::CreateOverloadedBinOp(clang::SourceLocation, clang::BinaryOperatorKind, clang::UnresolvedSetImpl const&, clang::Expr*, clang::Expr*, bool, bool, clang::FunctionDecl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6c20378)
#33 0x00000000067e4b51 BuildOverloadedBinOp(clang::Sema&, clang::Scope*, clang::SourceLocation, clang::BinaryOperatorKind, clang::Expr*, clang::Expr*) SemaExpr.cpp:0:0
#34 0x000000000686b227 clang::Sema::BuildBinOp(clang::Scope*, clang::SourceLocation, clang::BinaryOperatorKind, clang::Expr*, clang::Expr*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x686b227)
#35 0x000000000686b7c3 clang::Sema::ActOnBinOp(clang::Scope*, clang::SourceLocation, clang::tok::TokenKind, clang::Expr*, clang::Expr*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x686b7c3)
#36 0x0000000006c531d8 clang::Sema::BuildCXXForRangeStmt(clang::SourceLocation, clang::SourceLocation, clang::Stmt*, clang::SourceLocation, clang::Stmt*, clang::Stmt*, clang::Stmt*, clang::Expr*, clang::Expr*, clang::Stmt*, clang::SourceLocation, clang::Sema::BuildForRangeKind, llvm::ArrayRef<clang::MaterializeTemporaryExpr*>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6c531d8)
#37 0x0000000006e55a29 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::RebuildCXXForRangeStmt(clang::SourceLocation, clang::SourceLocation, clang::Stmt*, clang::SourceLocation, clang::Stmt*, clang::Stmt*, clang::Stmt*, clang::Expr*, clang::Expr*, clang::Stmt*, clang::SourceLocation, llvm::ArrayRef<clang::MaterializeTemporaryExpr*>) SemaTemplateInstantiate.cpp:0:0
#38 0x0000000006e9f7f7 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformCXXForRangeStmt(clang::CXXForRangeStmt*) SemaTemplateInstantiate.cpp:0:0
#39 0x0000000006e9fe54 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformCompoundStmt(clang::CompoundStmt*, bool) SemaTemplateInstantiate.cpp:0:0
#40 0x0000000006ea720a clang::Sema::SubstStmt(clang::Stmt*, clang::MultiLevelTemplateArgumentList const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6ea720a)
#41 0x0000000006efd7c8 clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6efd7c8)
#42 0x0000000006efba8f clang::Sema::PerformPendingInstantiations(bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6efba8f)
#43 0x0000000006efd23c clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6efd23c)
#44 0x0000000006efba8f clang::Sema::PerformPendingInstantiations(bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6efba8f)
#45 0x0000000006416c2f clang::Sema::ActOnEndOfTranslationUnitFragment(clang::Sema::TUFragmentKind) (.part.0) Sema.cpp:0:0
#46 0x000000000641741a clang::Sema::ActOnEndOfTranslationUnit() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x641741a)
#47 0x000000000629189a clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x629189a)
#48 0x000000000628527a clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x628527a)
#49 0x0000000004246e08 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4246e08)
#50 0x00000000044c8199 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x44c8199)
#51 0x000000000445025e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x445025e)
#52 0x00000000045aef3e clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x45aef3e)
#53 0x0000000000c4fdec cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc4fdec)
#54 0x0000000000c4907a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#55 0x000000000428a649 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
#56 0x00000000038c94c4 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x38c94c4)
#57 0x000000000428ac3f 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
#58 0x0000000004250fd5 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4250fd5)
#59 0x0000000004251a3d 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+++0x4251a3d)
#60 0x00000000042597c5 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x42597c5)
#61 0x0000000000c4d285 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc4d285)
#62 0x0000000000b2f354 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xb2f354)
#63 0x00007d5435e29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#64 0x00007d5435e29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#65 0x0000000000c48b6e _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc48b6e)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134

@Endilll Endilll removed the needs-reduction Large reproducer that should be reduced into a simpler form label May 5, 2024
@Woebbeking Woebbeking mentioned this issue May 9, 2024
Closed
@zyn0217 zyn0217 mentioned this issue May 23, 2024
Merged
@zyn0217 zyn0217 closed this as completed in 3d361b2 Jun 4, 2024
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c++20 clang:frontend Language frontend issues, e.g. anything involving "Sema" concepts C++20 concepts confirmed Verified by a second party crash Prefer [crash-on-valid] or [crash-on-invalid]
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[Clang][Sema] Tweak tryCaptureVariable for unevaluated lambdas zyn0217/llvm-project
6 participants
@mhx @shafik @EugeneZelenko @Endilll @llvmbot @zyn0217