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[clang][bytecode] Assertion `false && "Can't get arguments from that expression type"' failed. #158529

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[clang][bytecode] Assertion `false && "Can't get arguments from that expression type"' failed.#158529
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clang:bytecodeIssues for the clang bytecode constexpr interpretercrashPrefer [crash-on-valid] or [crash-on-invalid]
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Description

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opened on Sep 15, 2025

Reproducer:
https://godbolt.org/z/jb98xE8bK

namespace A {
namespace B {
namespace C {
struct foo {
  constexpr foo(int, ...) {}
};
struct boo : foo {
  using foo::foo;
};
struct bar : boo {
  using boo::boo;
};
bar u(0, 1);
} // namespace C
} // namespace B
} // namespace A

Backtrace:

clang++: /root/llvm-project/llvm/tools/clang/lib/AST/ByteCode/Interp.cpp:281: void clang::interp::cleanupAfterFunctionCall(clang::interp::InterpState&, clang::interp::CodePtr, const clang::interp::Function*): Assertion `false && "Can't get arguments from that expression type"' 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++ -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 -fexperimental-new-constant-interpreter <source>
1.	<source>:13:12: current parser token ';'
2.	<source>:1:1: parsing namespace 'A'
3.	<source>:2:1: parsing namespace 'A::B'
4.	<source>:3:1: parsing namespace 'A::B::C'
 #0 0x0000000004177998 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4177998)
 #1 0x0000000004174dc4 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4174dc4)
 #2 0x00000000040b9368 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #3 0x0000798363c42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
 #4 0x0000798363c969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
 #5 0x0000798363c42476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
 #6 0x0000798363c287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
 #7 0x0000798363c2871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
 #8 0x0000798363c39e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
 #9 0x0000000007c988d8 clang::interp::cleanupAfterFunctionCall(clang::interp::InterpState&, clang::interp::CodePtr, clang::interp::Function const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7c988d8)
#10 0x0000000007cd1013 clang::interp::RetVoid(clang::interp::InterpState&, clang::interp::CodePtr&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7cd1013)
#11 0x0000000007ce2017 clang::interp::Interpret(clang::interp::InterpState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7ce2017)
#12 0x0000000007cf1ba5 clang::interp::Call(clang::interp::InterpState&, clang::interp::CodePtr, clang::interp::Function const*, unsigned int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7cf1ba5)
#13 0x0000000007cecff1 clang::interp::Interpret(clang::interp::InterpState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7cecff1)
#14 0x0000000007cf1ba5 clang::interp::Call(clang::interp::InterpState&, clang::interp::CodePtr, clang::interp::Function const*, unsigned int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7cf1ba5)
#15 0x0000000007cecff1 clang::interp::Interpret(clang::interp::InterpState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7cecff1)
#16 0x0000000007cf3a23 clang::interp::CallVar(clang::interp::InterpState&, clang::interp::CodePtr, clang::interp::Function const*, unsigned int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7cf3a23)
#17 0x0000000007f7d4d9 clang::interp::Compiler<clang::interp::EvalEmitter>::VisitCXXConstructExpr(clang::CXXConstructExpr const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7f7d4d9)
#18 0x0000000007f7ca32 clang::interp::Compiler<clang::interp::EvalEmitter>::visitInitializer(clang::Expr const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7f7ca32)
#19 0x0000000007f7e06e clang::interp::Compiler<clang::interp::EvalEmitter>::visitVarDecl(clang::VarDecl const*, bool, bool)::'lambda0'(unsigned int)::operator()(unsigned int) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7f7e06e)
#20 0x0000000007f7e58d clang::interp::Compiler<clang::interp::EvalEmitter>::visitVarDecl(clang::VarDecl const*, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7f7e58d)
#21 0x0000000007f7ea03 clang::interp::Compiler<clang::interp::EvalEmitter>::visitDeclAndReturn(clang::VarDecl const*, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7f7ea03)
#22 0x0000000007b3fb72 clang::interp::EvalEmitter::interpretDecl(clang::VarDecl const*, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7b3fb72)
#23 0x0000000007aed962 clang::interp::Context::evaluateAsInitializer(clang::interp::State&, clang::VarDecl const*, clang::APValue&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7aed962)
#24 0x0000000007ac5a43 clang::Expr::EvaluateAsInitializer(clang::APValue&, clang::ASTContext const&, clang::VarDecl const*, llvm::SmallVectorImpl<std::pair<clang::SourceLocation, clang::PartialDiagnostic>>&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7ac5a43)
#25 0x00000000078d5722 clang::VarDecl::evaluateValueImpl(llvm::SmallVectorImpl<std::pair<clang::SourceLocation, clang::PartialDiagnostic>>&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x78d5722)
#26 0x00000000078d5ad1 clang::VarDecl::checkForConstantInitialization(llvm::SmallVectorImpl<std::pair<clang::SourceLocation, clang::PartialDiagnostic>>&) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x78d5ad1)
#27 0x0000000006beb06b clang::Sema::CheckCompleteVariableDeclaration(clang::VarDecl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6beb06b)
#28 0x0000000006c02ddb clang::Sema::AddInitializerToDecl(clang::Decl*, clang::Expr*, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6c02ddb)
#29 0x000000000687ebb9 clang::Parser::ParseDeclarationAfterDeclaratorAndAttributes(clang::Declarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x687ebb9)
#30 0x000000000688bfc9 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+++0x688bfc9)
#31 0x000000000684933e clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x684933e)
#32 0x0000000006849adf clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6849adf)
#33 0x000000000685191a clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x685191a)
#34 0x00000000068ad235 clang::Parser::ParseInnerNamespace(llvm::SmallVector<clang::Parser::InnerNamespaceInfo, 4u> const&, unsigned int, clang::SourceLocation&, clang::ParsedAttributes&, clang::BalancedDelimiterTracker&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x68ad235)
#35 0x00000000068b0046 clang::Parser::ParseNamespace(clang::DeclaratorContext, clang::SourceLocation&, clang::SourceLocation) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x68b0046)
#36 0x0000000006895330 clang::Parser::ParseDeclaration(clang::DeclaratorContext, clang::SourceLocation&, clang::ParsedAttributes&, clang::ParsedAttributes&, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6895330)
#37 0x00000000068519cc clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x68519cc)
#38 0x00000000068ad235 clang::Parser::ParseInnerNamespace(llvm::SmallVector<clang::Parser::InnerNamespaceInfo, 4u> const&, unsigned int, clang::SourceLocation&, clang::ParsedAttributes&, clang::BalancedDelimiterTracker&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x68ad235)
#39 0x00000000068b0046 clang::Parser::ParseNamespace(clang::DeclaratorContext, clang::SourceLocation&, clang::SourceLocation) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x68b0046)
#40 0x0000000006895330 clang::Parser::ParseDeclaration(clang::DeclaratorContext, clang::SourceLocation&, clang::ParsedAttributes&, clang::ParsedAttributes&, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6895330)
#41 0x00000000068519cc clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x68519cc)
#42 0x00000000068ad235 clang::Parser::ParseInnerNamespace(llvm::SmallVector<clang::Parser::InnerNamespaceInfo, 4u> const&, unsigned int, clang::SourceLocation&, clang::ParsedAttributes&, clang::BalancedDelimiterTracker&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x68ad235)
#43 0x00000000068b0046 clang::Parser::ParseNamespace(clang::DeclaratorContext, clang::SourceLocation&, clang::SourceLocation) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x68b0046)
#44 0x0000000006895330 clang::Parser::ParseDeclaration(clang::DeclaratorContext, clang::SourceLocation&, clang::ParsedAttributes&, clang::ParsedAttributes&, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6895330)
#45 0x00000000068519cc clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x68519cc)
#46 0x00000000068528b5 clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x68528b5)
#47 0x0000000006852d70 clang::Parser::ParseFirstTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6852d70)
#48 0x00000000068332f3 clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x68332f3)
#49 0x0000000004ab1438 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4ab1438)
#50 0x0000000004dab495 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4dab495)
#51 0x0000000004d2682e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4d2682e)
#52 0x0000000004ea0281 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4ea0281)
#53 0x0000000000db5abf cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xdb5abf)
#54 0x0000000000dac72a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#55 0x0000000004b1a3c9 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 0x00000000040b9804 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x40b9804)
#57 0x0000000004b1a9df 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 0x0000000004adb5bd clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4adb5bd)
#59 0x0000000004adc64e 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+++0x4adc64e)
#60 0x0000000004ae45e5 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4ae45e5)
#61 0x0000000000db1f45 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xdb1f45)
#62 0x0000000000c63e84 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc63e84)
#63 0x0000798363c29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#64 0x0000798363c29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#65 0x0000000000dac1d5 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xdac1d5)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134

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    clang:bytecodeIssues for the clang bytecode constexpr interpretercrashPrefer [crash-on-valid] or [crash-on-invalid]

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