Skip to content

[Clang] Clang crashes when compiling nested lambdas with default parameter capture since 18.1.0 #151813

New issue
New issue
Open
Bug
Open
[Clang] Clang crashes when compiling nested lambdas with default parameter capture since 18.1.0#151813
Bug
Labels
clang:frontendLanguage frontend issues, e.g. anything involving "Sema"confirmedVerified by a second partycrashPrefer [crash-on-valid] or [crash-on-invalid]generated by fuzzerlambdaC++11 lambda expressionsregression:18Regression in 18 release
@Xniao

Description

@Xniao
Xniao
opened on Aug 2, 2025

Repro: https://godbolt.org/z/3xEoKeEM5

  • clang start crashing on 18.1.0
  • generated by fuzzer

The compiler exhibits two different crash patterns:

  1. Exit code 70 (Sometimes)
  2. Exit code 139

Program

#include <functional>
#include <string>

template <typename T> T tmain() {
  int i = 0;
  auto shutdown_hook = [i](int val = i) {
    struct LazyClass {
      std::function<void()> lambda;
      LazyClass()
          : lambda([val]() {
              std::string msg = "Shutdown hook executed with value: " + std::to_string(val);
            }) {}
    };
    LazyClass instance;
  };

  return T();
}

int main() { return tmain<int>(); }

Stack Dump

  1. Exit code 70
<source>:6:38: error: default argument references local variable 'i' of enclosing function
    6 |   auto shutdown_hook = [i](int val = i) {
      |                                      ^
fatal error: error in backend: SmallVector unable to grow. Requested capacity (4294967296) is larger than maximum value for size type (4294967295)
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: /opt/compiler-explorer/clang-trunk/bin/clang++ -gdwarf-4 -g -o /app/output.s -mllvm --x86-asm-syntax=intel -fno-verbose-asm -S --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics <source>
1.	<eof> parser at end of file
2.	<source>:4:25: instantiating function definition 'tmain<int>'
 #0 0x0000000003ca5fb8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3ca5fb8)
 #1 0x0000000003ca398c llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3ca398c)
 #2 0x0000000003bf41d3 llvm::CrashRecoveryContext::HandleExit(int) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3bf41d3)
 #3 0x0000000003c9b1de llvm::sys::Process::Exit(int, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3c9b1de)
 #4 0x0000000000db8b9b LLVMErrorHandler(void*, char const*, bool) cc1_main.cpp:0:0
 #5 0x0000000003bfe103 llvm::report_fatal_error(llvm::Twine const&, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3bfe103)
 #6 0x0000000003c21346 report_size_overflow(unsigned long, unsigned long) (.constprop.0) SmallVector.cpp:0:0
 #7 0x0000000003c214c9 llvm::SmallVectorBase<unsigned int>::grow_pod(void*, unsigned long, unsigned long) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3c214c9)
 #8 0x00000000067b1440 clang::Sema::tryCaptureVariable(clang::ValueDecl*, clang::SourceLocation, clang::TryCaptureKind, clang::SourceLocation, bool, clang::QualType&, clang::QualType&, unsigned int const*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x67b1440)
 #9 0x00000000067b241b MarkVarDeclODRUsed(clang::ValueDecl*, clang::SourceLocation, clang::Sema&, unsigned int const*) SemaExpr.cpp:0:0
#10 0x00000000067b3fdb DoMarkVarDeclReferenced(clang::Sema&, clang::SourceLocation, clang::VarDecl*, clang::Expr*, llvm::DenseMap<clang::VarDecl const*, int, llvm::DenseMapInfo<clang::VarDecl const*, void>, llvm::detail::DenseMapPair<clang::VarDecl const*, int>>&) SemaExpr.cpp:0:0
#11 0x00000000067c6045 MarkExprReferenced(clang::Sema&, clang::SourceLocation, clang::Decl*, clang::Expr*, bool, llvm::DenseMap<clang::VarDecl const*, int, llvm::DenseMapInfo<clang::VarDecl const*, void>, llvm::detail::DenseMapPair<clang::VarDecl const*, int>>&) SemaExpr.cpp:0:0
#12 0x00000000067b4706 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-trunk/bin/clang+++0x67b4706)
#13 0x00000000067b4caf 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-trunk/bin/clang+++0x67b4caf)
#14 0x00000000067ba6d6 clang::Sema::BuildDeclarationNameExpr(clang::CXXScopeSpec const&, clang::DeclarationNameInfo const&, clang::NamedDecl*, clang::NamedDecl*, clang::TemplateArgumentListInfo const*, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x67ba6d6)
#15 0x0000000006de0c22 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformDeclRefExpr(clang::DeclRefExpr*) SemaTemplateInstantiate.cpp:0:0
#16 0x0000000006db4849 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#17 0x0000000006db47be clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#18 0x0000000006db9701 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformRecoveryExpr(clang::RecoveryExpr*) SemaTemplateInstantiate.cpp:0:0
#19 0x0000000006db4a76 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#20 0x0000000006dcc015 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformInitializer(clang::Expr*, bool) SemaTemplateInstantiate.cpp:0:0
#21 0x0000000006dcc8b5 void llvm::function_ref<void ()>::callback_fn<clang::Sema::SubstDefaultArgument(clang::SourceLocation, clang::ParmVarDecl*, clang::MultiLevelTemplateArgumentList const&, bool)::'lambda'()>(long) SemaTemplateInstantiate.cpp:0:0
#22 0x0000000007a71e21 clang::StackExhaustionHandler::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x7a71e21)
#23 0x0000000006db02b5 clang::Sema::SubstDefaultArgument(clang::SourceLocation, clang::ParmVarDecl*, clang::MultiLevelTemplateArgumentList const&, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6db02b5)
#24 0x0000000006db40e3 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformLambdaExpr(clang::LambdaExpr*) SemaTemplateInstantiate.cpp:0:0
#25 0x0000000006db50b0 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#26 0x0000000006dcc015 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformInitializer(clang::Expr*, bool) SemaTemplateInstantiate.cpp:0:0
#27 0x0000000006dcc824 clang::Sema::SubstInitializer(clang::Expr*, clang::MultiLevelTemplateArgumentList const&, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6dcc824)
#28 0x0000000006e00a3a clang::Sema::InstantiateVariableInitializer(clang::VarDecl*, clang::VarDecl*, clang::MultiLevelTemplateArgumentList const&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6e00a3a)
#29 0x0000000006e49412 clang::Sema::BuildVariableInstantiation(clang::VarDecl*, clang::VarDecl*, clang::MultiLevelTemplateArgumentList const&, llvm::SmallVector<clang::Sema::LateInstantiatedAttribute, 1u>*, clang::DeclContext*, clang::LocalInstantiationScope*, bool, clang::VarTemplateSpecializationDecl*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6e49412)
#30 0x0000000006e56253 clang::TemplateDeclInstantiator::VisitVarDecl(clang::VarDecl*, bool, llvm::ArrayRef<clang::BindingDecl*>*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6e56253)
#31 0x0000000006e636d7 void llvm::function_ref<void ()>::callback_fn<clang::Sema::SubstDecl(clang::Decl*, clang::DeclContext*, clang::MultiLevelTemplateArgumentList const&)::'lambda'()>(long) SemaTemplateInstantiateDecl.cpp:0:0
#32 0x0000000007a71e21 clang::StackExhaustionHandler::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x7a71e21)
#33 0x0000000006dff0fa clang::Sema::SubstDecl(clang::Decl*, clang::DeclContext*, clang::MultiLevelTemplateArgumentList const&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6dff0fa)
#34 0x0000000006d9eee0 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformDeclStmt(clang::DeclStmt*) SemaTemplateInstantiate.cpp:0:0
#35 0x0000000006df1a05 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformCompoundStmt(clang::CompoundStmt*, bool) SemaTemplateInstantiate.cpp:0:0
#36 0x0000000006df889b clang::Sema::SubstStmt(clang::Stmt*, clang::MultiLevelTemplateArgumentList const&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6df889b)
#37 0x0000000006e4e368 clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6e4e368)
#38 0x0000000006e4c478 clang::Sema::PerformPendingInstantiations(bool, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6e4c478)
#39 0x000000000641a3f9 clang::Sema::ActOnEndOfTranslationUnitFragment(clang::TUFragmentKind) (.part.0) Sema.cpp:0:0
#40 0x000000000641a6d4 clang::Sema::ActOnEndOfTranslationUnit() (/opt/compiler-explorer/clang-trunk/bin/clang+++0x641a6d4)
#41 0x0000000006269e78 clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6269e78)
#42 0x000000000625851a clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x625851a)
#43 0x00000000045f098d clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-trunk/bin/clang+++0x45f098d)
#44 0x00000000048fa40a clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-trunk/bin/clang+++0x48fa40a)
#45 0x000000000487546b clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x487546b)
#46 0x00000000049ee543 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x49ee543)
#47 0x0000000000dbabf5 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0xdbabf5)
#48 0x0000000000db2b4d ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#49 0x00000000046628f9 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
#50 0x0000000003bf40d3 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3bf40d3)
#51 0x0000000004662b19 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
#52 0x0000000004625fbd clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-trunk/bin/clang+++0x4625fbd)
#53 0x0000000004626f71 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-trunk/bin/clang+++0x4626f71)
#54 0x000000000463370c clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x463370c)
#55 0x0000000000db7411 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0xdb7411)
#56 0x0000000000c67984 main (/opt/compiler-explorer/clang-trunk/bin/clang+++0xc67984)
#57 0x00007b5bb4629d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#58 0x00007b5bb4629e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#59 0x0000000000db25e5 _start (/opt/compiler-explorer/clang-trunk/bin/clang+++0xdb25e5)
clang++: error: clang frontend command failed with exit code 70 (use -v to see invocation)
Compiler returned: 70
  1. Exit code 70
<source>:6:38: error: default argument references local variable 'i' of enclosing function
    6 |   auto shutdown_hook = [i](int val = i) {
      |                                      ^
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: /opt/compiler-explorer/clang-trunk/bin/clang++ -gdwarf-4 -g -o /app/output.s -mllvm --x86-asm-syntax=intel -fno-verbose-asm -S --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics <source>
1.	<eof> parser at end of file
2.	<source>:4:25: instantiating function definition 'tmain<int>'
 #0 0x0000000003ca5fb8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3ca5fb8)
 #1 0x0000000003ca398c llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3ca398c)
 #2 0x0000000003bf3cb8 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x00007033c2442520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x00000000067afa0b clang::Sema::tryCaptureVariable(clang::ValueDecl*, clang::SourceLocation, clang::TryCaptureKind, clang::SourceLocation, bool, clang::QualType&, clang::QualType&, unsigned int const*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x67afa0b)
 #5 0x00000000067b241b MarkVarDeclODRUsed(clang::ValueDecl*, clang::SourceLocation, clang::Sema&, unsigned int const*) SemaExpr.cpp:0:0
 #6 0x00000000067b3fdb DoMarkVarDeclReferenced(clang::Sema&, clang::SourceLocation, clang::VarDecl*, clang::Expr*, llvm::DenseMap<clang::VarDecl const*, int, llvm::DenseMapInfo<clang::VarDecl const*, void>, llvm::detail::DenseMapPair<clang::VarDecl const*, int>>&) SemaExpr.cpp:0:0
 #7 0x00000000067c6045 MarkExprReferenced(clang::Sema&, clang::SourceLocation, clang::Decl*, clang::Expr*, bool, llvm::DenseMap<clang::VarDecl const*, int, llvm::DenseMapInfo<clang::VarDecl const*, void>, llvm::detail::DenseMapPair<clang::VarDecl const*, int>>&) SemaExpr.cpp:0:0
 #8 0x00000000067b4706 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-trunk/bin/clang+++0x67b4706)
 #9 0x00000000067b4caf 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-trunk/bin/clang+++0x67b4caf)
#10 0x00000000067ba6d6 clang::Sema::BuildDeclarationNameExpr(clang::CXXScopeSpec const&, clang::DeclarationNameInfo const&, clang::NamedDecl*, clang::NamedDecl*, clang::TemplateArgumentListInfo const*, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x67ba6d6)
#11 0x0000000006de0c22 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformDeclRefExpr(clang::DeclRefExpr*) SemaTemplateInstantiate.cpp:0:0
#12 0x0000000006db4849 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#13 0x0000000006db47be clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#14 0x0000000006db9701 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformRecoveryExpr(clang::RecoveryExpr*) SemaTemplateInstantiate.cpp:0:0
#15 0x0000000006db4a76 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#16 0x0000000006dcc015 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformInitializer(clang::Expr*, bool) SemaTemplateInstantiate.cpp:0:0
#17 0x0000000006dcc8b5 void llvm::function_ref<void ()>::callback_fn<clang::Sema::SubstDefaultArgument(clang::SourceLocation, clang::ParmVarDecl*, clang::MultiLevelTemplateArgumentList const&, bool)::'lambda'()>(long) SemaTemplateInstantiate.cpp:0:0
#18 0x0000000007a71e21 clang::StackExhaustionHandler::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x7a71e21)
#19 0x0000000006db02b5 clang::Sema::SubstDefaultArgument(clang::SourceLocation, clang::ParmVarDecl*, clang::MultiLevelTemplateArgumentList const&, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6db02b5)
#20 0x0000000006db40e3 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformLambdaExpr(clang::LambdaExpr*) SemaTemplateInstantiate.cpp:0:0
#21 0x0000000006db50b0 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformExpr(clang::Expr*) SemaTemplateInstantiate.cpp:0:0
#22 0x0000000006dcc015 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformInitializer(clang::Expr*, bool) SemaTemplateInstantiate.cpp:0:0
#23 0x0000000006dcc824 clang::Sema::SubstInitializer(clang::Expr*, clang::MultiLevelTemplateArgumentList const&, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6dcc824)
#24 0x0000000006e00a3a clang::Sema::InstantiateVariableInitializer(clang::VarDecl*, clang::VarDecl*, clang::MultiLevelTemplateArgumentList const&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6e00a3a)
#25 0x0000000006e49412 clang::Sema::BuildVariableInstantiation(clang::VarDecl*, clang::VarDecl*, clang::MultiLevelTemplateArgumentList const&, llvm::SmallVector<clang::Sema::LateInstantiatedAttribute, 1u>*, clang::DeclContext*, clang::LocalInstantiationScope*, bool, clang::VarTemplateSpecializationDecl*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6e49412)
#26 0x0000000006e56253 clang::TemplateDeclInstantiator::VisitVarDecl(clang::VarDecl*, bool, llvm::ArrayRef<clang::BindingDecl*>*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6e56253)
#27 0x0000000006e636d7 void llvm::function_ref<void ()>::callback_fn<clang::Sema::SubstDecl(clang::Decl*, clang::DeclContext*, clang::MultiLevelTemplateArgumentList const&)::'lambda'()>(long) SemaTemplateInstantiateDecl.cpp:0:0
#28 0x0000000007a71e21 clang::StackExhaustionHandler::runWithSufficientStackSpace(clang::SourceLocation, llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x7a71e21)
#29 0x0000000006dff0fa clang::Sema::SubstDecl(clang::Decl*, clang::DeclContext*, clang::MultiLevelTemplateArgumentList const&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6dff0fa)
#30 0x0000000006d9eee0 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformDeclStmt(clang::DeclStmt*) SemaTemplateInstantiate.cpp:0:0
#31 0x0000000006df1a05 clang::TreeTransform<(anonymous namespace)::TemplateInstantiator>::TransformCompoundStmt(clang::CompoundStmt*, bool) SemaTemplateInstantiate.cpp:0:0
#32 0x0000000006df889b clang::Sema::SubstStmt(clang::Stmt*, clang::MultiLevelTemplateArgumentList const&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6df889b)
#33 0x0000000006e4e368 clang::Sema::InstantiateFunctionDefinition(clang::SourceLocation, clang::FunctionDecl*, bool, bool, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6e4e368)
#34 0x0000000006e4c478 clang::Sema::PerformPendingInstantiations(bool, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6e4c478)
#35 0x000000000641a3f9 clang::Sema::ActOnEndOfTranslationUnitFragment(clang::TUFragmentKind) (.part.0) Sema.cpp:0:0
#36 0x000000000641a6d4 clang::Sema::ActOnEndOfTranslationUnit() (/opt/compiler-explorer/clang-trunk/bin/clang+++0x641a6d4)
#37 0x0000000006269e78 clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x6269e78)
#38 0x000000000625851a clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x625851a)
#39 0x00000000045f098d clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-trunk/bin/clang+++0x45f098d)
#40 0x00000000048fa40a clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-trunk/bin/clang+++0x48fa40a)
#41 0x000000000487546b clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x487546b)
#42 0x00000000049ee543 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x49ee543)
#43 0x0000000000dbabf5 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-trunk/bin/clang+++0xdbabf5)
#44 0x0000000000db2b4d ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#45 0x00000000046628f9 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
#46 0x0000000003bf40d3 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x3bf40d3)
#47 0x0000000004662b19 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
#48 0x0000000004625fbd clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-trunk/bin/clang+++0x4625fbd)
#49 0x0000000004626f71 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&, bool) const (/opt/compiler-explorer/clang-trunk/bin/clang+++0x4626f71)
#50 0x000000000463370c clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0x463370c)
#51 0x0000000000db7411 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-trunk/bin/clang+++0xdb7411)
#52 0x0000000000c67984 main (/opt/compiler-explorer/clang-trunk/bin/clang+++0xc67984)
#53 0x00007033c2429d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#54 0x00007033c2429e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#55 0x0000000000db25e5 _start (/opt/compiler-explorer/clang-trunk/bin/clang+++0xdb25e5)
clang++: error: clang frontend command failed with exit code 139 (use -v to see invocation)
Compiler returned: 139

Metadata

Metadata

Assignees

No one assigned

    Labels

    clang:frontendLanguage frontend issues, e.g. anything involving "Sema"confirmedVerified by a second partycrashPrefer [crash-on-valid] or [crash-on-invalid]generated by fuzzerlambdaC++11 lambda expressionsregression:18Regression in 18 release

    Type

    Bug

    Projects

    Clang Regressions

    Status

    No status

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions