[clang][bytecode] crash where expected expression is missing #174382
Description
Reproducer:
https://godbolt.org/z/7dse6d1Kq
class type_info {};
struct Item {
const type_info &ti;
};
extern constexpr Item items[] = ;
constexpr auto &x = items[0].ti;Backtrace:
clang++: /root/llvm-project/llvm/tools/clang/lib/AST/ByteCode/Pointer.h:803: clang::interp::InlineDescriptor* clang::interp::Pointer::getInlineDesc() const: Assertion `BS.Base <= BS.Pointee->getSize()' 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>:8:32: current parser token ';'
#0 0x00000000043098c8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x43098c8)
#1 0x0000000004306cf4 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4306cf4)
#2 0x000000000424b798 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
#3 0x000074e8cee42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#4 0x000074e8cee969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#5 0x000074e8cee42476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#6 0x000074e8cee287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#7 0x000074e8cee2871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
#8 0x000074e8cee39e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#9 0x0000000007dcf44a clang::interp::Pointer::getInlineDesc() const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dcf44a)
#10 0x0000000007fda325 clang::interp::Pointer::getFieldDesc() const (.part.0) Pointer.cpp:0:0
#11 0x0000000007fdbff5 clang::interp::Pointer::isInitialized() const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7fdbff5)
#12 0x0000000007f7c1f0 clang::interp::CheckExtern(clang::interp::InterpState&, clang::interp::CodePtr, clang::interp::Pointer const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7f7c1f0)
#13 0x0000000007fa286b clang::interp::CheckLoad(clang::interp::InterpState&, clang::interp::CodePtr, clang::interp::Pointer const&, clang::AccessKinds) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7fa286b)
#14 0x0000000007e0530a bool clang::interp::GetFieldPop<(clang::interp::PrimType)13, clang::interp::Pointer>(clang::interp::InterpState&, clang::interp::CodePtr, unsigned int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7e0530a)
#15 0x0000000008267f55 clang::interp::Compiler<clang::interp::EvalEmitter>::VisitMemberExpr(clang::MemberExpr const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x8267f55)
#16 0x000000000826e11a clang::interp::Compiler<clang::interp::EvalEmitter>::visit(clang::Expr const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x826e11a)
#17 0x0000000008262b86 clang::interp::Compiler<clang::interp::EvalEmitter>::visitVarDecl(clang::VarDecl const*, clang::Expr const*, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x8262b86)
#18 0x0000000008262ead clang::interp::Compiler<clang::interp::EvalEmitter>::visitDeclAndReturn(clang::VarDecl const*, clang::Expr const*, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x8262ead)
#19 0x0000000007df1aed clang::interp::EvalEmitter::interpretDecl(clang::VarDecl const*, clang::Expr const*, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df1aed)
#20 0x0000000007dd0896 clang::interp::Context::evaluateAsInitializer(clang::interp::State&, clang::VarDecl const*, clang::Expr const*, clang::APValue&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dd0896)
#21 0x0000000007db9786 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+++0x7db9786)
#22 0x0000000007b9e252 clang::VarDecl::evaluateValueImpl(llvm::SmallVectorImpl<std::pair<clang::SourceLocation, clang::PartialDiagnostic>>&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7b9e252)
#23 0x0000000007b9e601 clang::VarDecl::checkForConstantInitialization(llvm::SmallVectorImpl<std::pair<clang::SourceLocation, clang::PartialDiagnostic>>&) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7b9e601)
#24 0x0000000006e2566b clang::Sema::CheckCompleteVariableDeclaration(clang::VarDecl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6e2566b)
#25 0x0000000006e2d436 clang::Sema::AddInitializerToDecl(clang::Decl*, clang::Expr*, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6e2d436)
#26 0x0000000006a7b7c1 clang::Parser::ParseDeclarationAfterDeclaratorAndAttributes(clang::Declarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a7b7c1)
#27 0x0000000006a88a1a 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+++0x6a88a1a)
#28 0x0000000006a460cb clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a460cb)
#29 0x0000000006a468bf clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a468bf)
#30 0x0000000006a4e6ea clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a4e6ea)
#31 0x0000000006a4f685 clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a4f685)
#32 0x0000000006a3070a clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a3070a)
#33 0x0000000004c6a998 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4c6a998)
#34 0x0000000004f613e5 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4f613e5)
#35 0x0000000004ee159e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4ee159e)
#36 0x000000000505b76d clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x505b76d)
#37 0x0000000000de6fa4 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xde6fa4)
#38 0x0000000000ddda1a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>) driver.cpp:0:0
#39 0x0000000000dddb9d int llvm::function_ref<int (llvm::SmallVectorImpl<char const*>&)>::callback_fn<clang_main(int, char**, llvm::ToolContext const&)::'lambda'(llvm::SmallVectorImpl<char const*>&)>(long, llvm::SmallVectorImpl<char const*>&) driver.cpp:0:0
#40 0x0000000004cdd2e9 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
#41 0x000000000424bc34 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x424bc34)
#42 0x0000000004cdd8ff 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
#43 0x0000000004c9e3e2 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4c9e3e2)
#44 0x0000000004c9f38e 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+++0x4c9f38e)
#45 0x0000000004ca67e5 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4ca67e5)
#46 0x0000000000de33c1 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xde33c1)
#47 0x0000000000c8dcf4 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc8dcf4)
#48 0x000074e8cee29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#49 0x000074e8cee29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#50 0x0000000000ddd4b5 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xddd4b5)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134Goes back to clang-20:
https://godbolt.org/z/1nrbYsq6h