[clang++] Assertion `DeclAccess != AS_none' failed. in clang::Sema::LookupQualifiedName(clang::LookupResult&, clang::DeclContext*, bool) #112377
Description
This testcase is generated by a fuzzer.
Compiler Explorer: https://godbolt.org/z/65G3axG7e
This invalid code will crash on Clang Assertion Trunk, it seems that this goes back to clang-4:
struct B {};
struct Base {
Base(struct B;);
};
class Forward : Base {
using Base::Base;
};
class A : Forward {
A();
};
A::A() : Forward(B()) {}Stack dump:
clang++: /root/llvm-project/clang/include/clang/AST/DeclCXX.h:1733: static clang::AccessSpecifier clang::CXXRecordDecl::MergeAccess(clang::AccessSpecifier, clang::AccessSpecifier): Assertion `DeclAccess != AS_none' 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 -fno-verbose-asm -S --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics <source>
1. <source>:11:18: current parser token 'B'
#0 0x0000000003bae128 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3bae128)
#1 0x0000000003babdec llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3babdec)
#2 0x0000000003af9048 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
#3 0x000072ae3a842520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#4 0x000072ae3a8969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#5 0x000072ae3a842476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#6 0x000072ae3a8287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#7 0x000072ae3a82871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
#8 0x000072ae3a839e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#9 0x0000000006ecc2d2 clang::Sema::LookupQualifiedName(clang::LookupResult&, clang::DeclContext*, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6ecc2d2)
#10 0x0000000006ecd4d5 clang::Sema::CppLookupName(clang::LookupResult&, clang::Scope*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6ecd4d5)
#11 0x0000000006ece5cd clang::Sema::LookupName(clang::LookupResult&, clang::Scope*, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6ece5cd)
#12 0x0000000006a1c515 clang::Sema::getTypeName(clang::IdentifierInfo const&, clang::SourceLocation, clang::Scope*, clang::CXXScopeSpec*, bool, bool, clang::OpaquePtr<clang::QualType>, bool, bool, bool, clang::ImplicitTypenameContext, clang::IdentifierInfo**) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a1c515)
#13 0x0000000006649eb4 clang::Parser::TryAnnotateTypeOrScopeTokenAfterScopeSpec(clang::CXXScopeSpec&, bool, clang::ImplicitTypenameContext) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6649eb4)
#14 0x000000000664cb2e clang::Parser::TryAnnotateTypeOrScopeToken(clang::ImplicitTypenameContext) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x664cb2e)
#15 0x00000000066c0bae clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, bool&, clang::Parser::TypeCastState, bool, bool*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66c0bae)
#16 0x00000000066c2ad7 clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, clang::Parser::TypeCastState, bool, bool*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66c2ad7)
#17 0x00000000066c2b69 clang::Parser::ParseAssignmentExpression(clang::Parser::TypeCastState) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66c2b69)
#18 0x00000000066c2ece clang::Parser::ParseExpressionList(llvm::SmallVectorImpl<clang::Expr*>&, llvm::function_ref<void ()>, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66c2ece)
#19 0x00000000066a49e5 clang::Parser::ParseMemInitializer(clang::Decl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66a49e5)
#20 0x00000000066a6465 clang::Parser::ParseConstructorInitializer(clang::Decl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66a6465)
#21 0x00000000066578d3 clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66578d3)
#22 0x000000000668be8d 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+++0x668be8d)
#23 0x000000000664b51e clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x664b51e)
#24 0x000000000664bcde clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x664bcde)
#25 0x0000000006653473 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6653473)
#26 0x000000000665435d clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x665435d)
#27 0x000000000664687a clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x664687a)
#28 0x0000000004507088 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4507088)
#29 0x00000000047c1509 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x47c1509)
#30 0x000000000474008e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x474008e)
#31 0x00000000048a70de clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x48a70de)
#32 0x0000000000cdc07f cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xcdc07f)
#33 0x0000000000cd3d8a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#34 0x000000000454ad99 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
#35 0x0000000003af94f4 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3af94f4)
#36 0x000000000454b38f 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
#37 0x0000000004510c8d clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4510c8d)
#38 0x0000000004511d7d 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+++0x4511d7d)
#39 0x00000000045196a5 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x45196a5)
#40 0x0000000000cd8f4f clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xcd8f4f)
#41 0x0000000000ba8474 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xba8474)
#42 0x000072ae3a829d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#43 0x000072ae3a829e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#44 0x0000000000cd383e _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xcd383e)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134