Open
Description
Start from clang-15: https://godbolt.org/z/87Tjfrosv
Generated by fuzzer.
Reduced Test:
template <class T> struct Base {
static void f();
};
struct X0 { };
template <class T> struct Derived: Base<int>, Base<char> {
void g(X0 *t = h(t)) {
t->Base::f();
}
};
Stack Dump:
clang++: /root/llvm-project/llvm/tools/clang/lib/Sema/SemaCXXScopeSpec.cpp:367: clang::NamedDecl* clang::Sema::FindFirstQualifierInScope(clang::Scope*, clang::NestedNameSpecifier*): Assertion `!Found.isAmbiguous() && "Cannot handle ambiguities here yet"' 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>:10:15: current parser token '('
2. <source>:7:20: parsing struct/union/class body 'Derived'
3. <source>:9:24: parsing function body 'Derived::g'
4. <source>:9:24: in compound statement ('{}')
#0 0x0000000003f78848 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3f78848)
#1 0x0000000003f764d4 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3f764d4)
#2 0x0000000003ebb048 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
#3 0x00007b5b4bc42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#4 0x00007b5b4bc969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#5 0x00007b5b4bc42476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#6 0x00007b5b4bc287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#7 0x00007b5b4bc2871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
#8 0x00007b5b4bc39e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#9 0x000000000683c7d3 (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x683c7d3)
#10 0x0000000006c51ba2 clang::Sema::ActOnMemberAccessExpr(clang::Scope*, clang::Expr*, clang::SourceLocation, clang::tok::TokenKind, clang::CXXScopeSpec&, clang::SourceLocation, clang::UnqualifiedId&, clang::Decl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6c51ba2)
#11 0x00000000066a7077 clang::Parser::ParsePostfixExpressionSuffix(clang::ActionResult<clang::Expr*, true>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66a7077)
#12 0x000000000669fdaa clang::Parser::ParseCastExpression(clang::CastParseKind, bool, bool&, clang::TypeCastState, bool, bool*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x669fdaa)
#13 0x00000000066a1f47 clang::Parser::ParseCastExpression(clang::CastParseKind, bool, clang::TypeCastState, bool, bool*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66a1f47)
#14 0x00000000066a1fd9 clang::Parser::ParseAssignmentExpression(clang::TypeCastState) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66a1fd9)
#15 0x00000000066a6699 clang::Parser::ParseExpression(clang::TypeCastState) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66a6699)
#16 0x000000000673a479 clang::Parser::ParseExprStatement(clang::Parser::ParsedStmtContext) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x673a479)
#17 0x0000000006731e28 clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 24u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&, clang::ParsedAttributes&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6731e28)
#18 0x0000000006732c4d clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 24u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6732c4d)
#19 0x000000000673ab73 clang::Parser::ParseCompoundStatementBody(bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x673ab73)
#20 0x000000000673b33a clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x673b33a)
#21 0x00000000066423c0 clang::Parser::ParseLexedMethodDef(clang::Parser::LexedMethod&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66423c0)
#22 0x00000000066420ad clang::Parser::ParseLexedMethodDefs(clang::Parser::ParsingClass&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66420ad)
#23 0x0000000006695159 clang::Parser::ParseCXXMemberSpecification(clang::SourceLocation, clang::SourceLocation, clang::ParsedAttributes&, unsigned int, clang::Decl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6695159)
#24 0x0000000006697f10 clang::Parser::ParseClassSpecifier(clang::tok::TokenKind, clang::SourceLocation, clang::DeclSpec&, clang::Parser::ParsedTemplateInfo&, clang::AccessSpecifier, bool, clang::Parser::DeclSpecContext, clang::ParsedAttributes&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6697f10)
#25 0x000000000666b4e0 clang::Parser::ParseDeclarationSpecifiers(clang::DeclSpec&, clang::Parser::ParsedTemplateInfo&, clang::AccessSpecifier, clang::Parser::DeclSpecContext, clang::Parser::LateParsedAttrList*, clang::ImplicitTypenameContext) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x666b4e0)
#26 0x0000000006746cbc clang::Parser::ParseDeclarationAfterTemplate(clang::DeclaratorContext, clang::Parser::ParsedTemplateInfo&, clang::ParsingDeclRAIIObject&, clang::SourceLocation&, clang::ParsedAttributes&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6746cbc)
#27 0x000000000675492f clang::Parser::ParseTemplateDeclarationOrSpecialization(clang::DeclaratorContext, clang::SourceLocation&, clang::ParsedAttributes&, clang::AccessSpecifier) (.part.0) ParseTemplate.cpp:0:0
#28 0x0000000006754cda clang::Parser::ParseDeclarationStartingWithTemplate(clang::DeclaratorContext, clang::SourceLocation&, clang::ParsedAttributes&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6754cda)
#29 0x00000000066721b0 clang::Parser::ParseDeclaration(clang::DeclaratorContext, clang::SourceLocation&, clang::ParsedAttributes&, clang::ParsedAttributes&, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66721b0)
#30 0x000000000662f85c clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x662f85c)
#31 0x000000000663077d clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x663077d)
#32 0x0000000006622aea clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6622aea)
#33 0x000000000492ed48 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x492ed48)
#34 0x0000000004c28c65 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4c28c65)
#35 0x0000000004ba5ffe clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4ba5ffe)
#36 0x0000000004d1b441 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4d1b441)
#37 0x0000000000d8e81f cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd8e81f)
#38 0x0000000000d853fa ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#39 0x0000000004995b49 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
#40 0x0000000003ebb4e4 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3ebb4e4)
#41 0x000000000499615f 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
#42 0x0000000004957f8d clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4957f8d)
#43 0x000000000495901e 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+++0x495901e)
#44 0x00000000049614d5 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x49614d5)
#45 0x0000000000d8accf clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd8accf)
#46 0x0000000000c41924 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc41924)
#47 0x00007b5b4bc29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#48 0x00007b5b4bc29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#49 0x0000000000d84ea5 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd84ea5)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)