llvmbot
commented
1 day ago @llvm/issue-subscribers-clang-frontend
Author: Yihan Yang (yijan4845)
**This testcase is generated by a fuzzer.**
Compiler Explorer: [https://godbolt.org/z/6ErEcsj3j](https://godbolt.org/z/6ErEcsj3j)
This valid code will crash on Clang Trunk:
```cpp
struct F {};
struct S {
F a {};
};
class C {
S s[1000000000];
} c ;
```
The stack dump is similar to [107516](https://github.com/llvm/llvm-project/issues/107516) but `-std=c++23` is not required in this case. It seems that this goes back to clang-6.
Stack dump:
```
LLVM ERROR: out of memory
Allocation 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 -O3 <source>
1. <source>:7:5: current parser token ';'
#0 0x0000000003bb93f8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3bb93f8)
#1 0x0000000003bb70bc llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3bb70bc)
#2 0x0000000003b046a8 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
#3 0x0000734028642520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#4 0x00007340286969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#5 0x0000734028642476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#6 0x00007340286287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#7 0x0000000003b1003b (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3b1003b)
#8 0x0000000003b10055 (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3b10055)
#9 0x0000734028aae9a3 operator new(unsigned long) (/lib/x86_64-linux-gnu/libstdc++.so.6+0xae9a3)
#10 0x000000000784485a clang::APValue::MakeArray(unsigned int, unsigned int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x784485a)
#11 0x0000000007b85b63 (anonymous namespace)::ArrayExprEvaluator::VisitCXXConstructExpr(clang::CXXConstructExpr const*, (anonymous namespace)::LValue const&, clang::APValue*, clang::QualType) ExprConstant.cpp:0:0
#12 0x0000000007b865c9 clang::StmtVisitorBase<llvm::make_const_ptr, (anonymous namespace)::ArrayExprEvaluator, bool>::Visit(clang::Stmt const*) ExprConstant.cpp:0:0
#13 0x0000000007b87f0d EvaluateArray(clang::Expr const*, (anonymous namespace)::LValue const&, clang::APValue&, (anonymous namespace)::EvalInfo&) ExprConstant.cpp:0:0
#14 0x0000000007b4e6f1 EvaluateInPlace(clang::APValue&, (anonymous namespace)::EvalInfo&, (anonymous namespace)::LValue const&, clang::Expr const*, bool) ExprConstant.cpp:0:0
#15 0x0000000007b84534 HandleConstructorCall(clang::Expr const*, (anonymous namespace)::LValue const&, (anonymous namespace)::CallRef, clang::CXXConstructorDecl const*, (anonymous namespace)::EvalInfo&, clang::APValue&) ExprConstant.cpp:0:0
#16 0x0000000007b854cf HandleConstructorCall(clang::Expr const*, (anonymous namespace)::LValue const&, llvm::ArrayRef<clang::Expr const*>, clang::CXXConstructorDecl const*, (anonymous namespace)::EvalInfo&, clang::APValue&) ExprConstant.cpp:0:0
#17 0x0000000007b856f4 (anonymous namespace)::RecordExprEvaluator::VisitCXXConstructExpr(clang::CXXConstructExpr const*, clang::QualType) ExprConstant.cpp:0:0
#18 0x0000000007b8953f clang::StmtVisitorBase<llvm::make_const_ptr, (anonymous namespace)::RecordExprEvaluator, bool>::Visit(clang::Stmt const*) ExprConstant.cpp:0:0
#19 0x0000000007b8b6a8 EvaluateRecord(clang::Expr const*, (anonymous namespace)::LValue const&, clang::APValue&, (anonymous namespace)::EvalInfo&) ExprConstant.cpp:0:0
#20 0x0000000007b4e761 EvaluateInPlace(clang::APValue&, (anonymous namespace)::EvalInfo&, (anonymous namespace)::LValue const&, clang::Expr const*, bool) ExprConstant.cpp:0:0
#21 0x0000000007b90953 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+++0x7b90953)
#22 0x0000000007a5bc52 clang::VarDecl::evaluateValueImpl(llvm::SmallVectorImpl<std::pair<clang::SourceLocation, clang::PartialDiagnostic>>&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7a5bc52)
#23 0x0000000007a5bfd1 clang::VarDecl::checkForConstantInitialization(llvm::SmallVectorImpl<std::pair<clang::SourceLocation, clang::PartialDiagnostic>>&) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7a5bfd1)
#24 0x0000000006a25cae clang::Sema::CheckCompleteVariableDeclaration(clang::VarDecl*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a25cae)
#25 0x0000000006a272d1 clang::Sema::ActOnUninitializedDecl(clang::Decl*) (.part.0) SemaDecl.cpp:0:0
#26 0x00000000066ad038 clang::Parser::ParseDeclarationAfterDeclaratorAndAttributes(clang::Declarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66ad038)
#27 0x00000000066bca59 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+++0x66bca59)
#28 0x000000000667cace clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x667cace)
#29 0x000000000667d28e clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x667d28e)
#30 0x0000000006684a23 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6684a23)
#31 0x000000000668590d clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x668590d)
#32 0x0000000006677e2a clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6677e2a)
#33 0x000000000452f368 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x452f368)
#34 0x00000000047ea629 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x47ea629)
#35 0x000000000476911e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x476911e)
#36 0x00000000048cfcfe clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x48cfcfe)
#37 0x0000000000cde1ef cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xcde1ef)
#38 0x0000000000cd5efa ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#39 0x0000000004573089 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 0x0000000003b04b54 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3b04b54)
#41 0x000000000457367f 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 0x0000000004538f7d clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4538f7d)
#43 0x000000000453a06d 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+++0x453a06d)
#44 0x0000000004541995 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4541995)
#45 0x0000000000cdb0bf clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xcdb0bf)
#46 0x0000000000baa1b4 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xbaa1b4)
#47 0x0000734028629d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#48 0x0000734028629e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#49 0x0000000000cd59ae _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xcd59ae)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134
```
shafik
This testcase is generated by a fuzzer.
Compiler Explorer: https://godbolt.org/z/6ErEcsj3j
This valid code will crash on Clang Trunk:
The stack dump is similar to 107516 but
-std=c++23is not required in this case. It seems that this goes back to clang-6.Stack dump: