[Clang] Crash on CTAD for alias template involving default arguments · Issue #134471 · llvm/llvm-project (original) (raw)

template struct A {};

template using AA = A;

AA a{};

See https://compiler-explorer.com/z/fE9MGanjd.

Assertion:

clang++: /root/llvm-project/clang/lib/AST/ASTContext.cpp:6544: clang::QualType clang::ASTContext::getDeducedTemplateSpecializationTypeInternal(clang::TemplateName, clang::QualType, bool, clang::QualType) const: Assertion `ID == TempID && "ID does not match"' failed.

Stack dump

1. Program arguments: /opt/compiler-explorer/clang-assertions-trunk/bin/clang++ -gdwarf-4 -g -o /app/output.s -mllvm --x86-asm-syntax=intel -fno-verbose-asm -S --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics -std=c++20
2. :7:7: current parser token ';'

#0 0x0000000003eaa8c8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3eaa8c8) #1 0x0000000003ea8554 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3ea8554) #2 0x0000000003ded098 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0 #3 0x000071b807642520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520) #4 0x000071b8076969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc) #5 0x000071b807642476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476) #6 0x000071b8076287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3) #7 0x000071b80762871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b) #8 0x000071b807639e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96) #9 0x00000000073a412c clang::ASTContext::getDeducedTemplateSpecializationTypeInternal(clang::TemplateName, clang::QualType, bool, clang::QualType) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x73a412c) #10 0x00000000073f11a3 clang::ASTContext::getDeducedTemplateSpecializationType(clang::TemplateName, clang::QualType, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x73f11a3) #11 0x0000000006fc3765 clang::TreeTransform<(anonymous namespace)::SubstituteDeducedTypeTransform>::TransformType(clang::TypeLocBuilder&, clang::TypeLoc) SemaTemplateDeduction.cpp:0:0 #12 0x0000000006fdf18d clang::TreeTransform<(anonymous namespace)::SubstituteDeducedTypeTransform>::TransformElaboratedType(clang::TypeLocBuilder&, clang::ElaboratedTypeLoc) SemaTemplateDeduction.cpp:0:0 #13 0x0000000006fc2a73 clang::TreeTransform<(anonymous namespace)::SubstituteDeducedTypeTransform>::TransformType(clang::TypeLocBuilder&, clang::TypeLoc) SemaTemplateDeduction.cpp:0:0 #14 0x0000000006fc45b2 clang::TreeTransform<(anonymous namespace)::SubstituteDeducedTypeTransform>::TransformType(clang::TypeSourceInfo*) SemaTemplateDeduction.cpp:0:0 #15 0x0000000006fc47b0 clang::TreeTransform<(anonymous namespace)::SubstituteDeducedTypeTransform>::TransformType(clang::QualType) SemaTemplateDeduction.cpp:0:0 #16 0x0000000006fc5a24 clang::Sema::SubstAutoType(clang::QualType, clang::QualType) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6fc5a24) #17 0x0000000006becf1d clang::Sema::DeduceTemplateSpecializationFromInitializer(clang::TypeSourceInfo*, clang::InitializedEntity const&, clang::InitializationKind const&, llvm::MutableArrayRefclang::Expr*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6becf1d) #18 0x000000000686b5ed clang::Sema::deduceVarTypeFromInitializer(clang::VarDecl*, clang::DeclarationName, clang::QualType, clang::TypeSourceInfo*, clang::SourceRange, bool, clang::Expr*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x686b5ed) #19 0x00000000068703f7 clang::Sema::DeduceVariableDeclarationType(clang::VarDecl*, bool, clang::Expr*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x68703f7) #20 0x00000000068913a2 clang::Sema::AddInitializerToDecl(clang::Decl*, clang::Expr*, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x68913a2) #21 0x0000000006518a95 clang::Parser::ParseDeclarationAfterDeclaratorAndAttributes(clang::Declarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6518a95) #22 0x00000000065280b9 clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::ParsedAttributes&, clang::Parser::ParsedTemplateInfo&, clang::SourceLocation*, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x65280b9) #23 0x00000000064e6bae clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64e6bae) #24 0x00000000064e7369 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64e7369) #25 0x00000000064ef173 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64ef173) #26 0x00000000064f008d clang::Parser::ParseTopLevelDecl(clang::OpaquePtrclang::DeclGroupRef&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64f008d) #27 0x00000000064e201a clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x64e201a) #28 0x0000000004843468 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4843468) #29 0x0000000004b31f05 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4b31f05) #30 0x0000000004ab3d9e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4ab3d9e) #31 0x0000000004c2211e clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4c2211e) #32 0x0000000000d5fb1f cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd5fb1f) #33 0x0000000000d572da ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0 #34 0x00000000048a8db9 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optionalllvm::StringRef>, std::__cxx11::basic_string<char, std::char_traits, std::allocator>, bool) const::'lambda'()>(long) Job.cpp:0:0 #35 0x0000000003ded534 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3ded534) #36 0x00000000048a93cf clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optionalllvm::StringRef>, std::__cxx11::basic_string<char, std::char_traits, std::allocator>, bool) const (.part.0) Job.cpp:0:0 #37 0x000000000486be6d clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x486be6d) #38 0x000000000486cefe 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+++0x486cefe) #39 0x0000000004874605 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4874605) #40 0x0000000000d5c918 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd5c918) #41 0x0000000000c22cf4 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc22cf4) #42 0x000071b807629d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90) #43 0x000071b807629e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40) #44 0x0000000000d56d85 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd56d85)