llvmbot
commented
3 weeks ago @llvm/issue-subscribers-clang-frontend
Author: Yihan Yang (yijan4845)
**This testcase is generated by a fuzzer.**
Compiler Explorer: [https://godbolt.org/z/ebY8s1oMP](https://godbolt.org/z/ebY8s1oMP)
This simple invalid code will crash on Clang Assertion Trunk:
```cpp
void Bar(this int) {
Bar();
}
```
It seems that this goes back to clang-19.
Stack dump:
```
clang++: /root/llvm-project/clang/lib/Sema/SemaOverload.cpp:11483: bool CheckArityMismatch(clang::Sema&, clang::OverloadCandidate*, unsigned int, bool): Assertion `(Cand->FailureKind == ovl_fail_too_many_arguments) || (Cand->FailureKind == ovl_fail_bad_deduction && Cand->DeductionFailure.getResult() == TemplateDeductionResult::TooManyArguments)' 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>:2:9: current parser token ')'
2. <source>:1:20: parsing function body 'Bar'
3. <source>:1:20: in compound statement ('{}')
#0 0x0000000003bba5e8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3bba5e8)
#1 0x0000000003bb82ac llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3bb82ac)
#2 0x0000000003b05918 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
#3 0x0000713a84842520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#4 0x0000713a848969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#5 0x0000713a84842476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#6 0x0000713a848287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#7 0x0000713a8482871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
#8 0x0000713a84839e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#9 0x00000000070d362e CheckArityMismatch(clang::Sema&, clang::OverloadCandidate*, unsigned int, bool) (.constprop.0) SemaOverload.cpp:0:0
#10 0x0000000007115bda clang::OverloadCandidateSet::NoteCandidates(clang::Sema&, llvm::ArrayRef<clang::Expr*>, llvm::ArrayRef<clang::OverloadCandidate*>, llvm::StringRef, clang::SourceLocation) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7115bda)
#11 0x0000000007116d11 clang::OverloadCandidateSet::NoteCandidates(std::pair<clang::SourceLocation, clang::PartialDiagnostic>, clang::Sema&, clang::OverloadCandidateDisplayKind, llvm::ArrayRef<clang::Expr*>, llvm::StringRef, clang::SourceLocation, llvm::function_ref<bool (clang::OverloadCandidate&)>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7116d11)
#12 0x000000000711b46e FinishOverloadedCallExpr(clang::Sema&, clang::Scope*, clang::Expr*, clang::UnresolvedLookupExpr*, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, clang::Expr*, clang::OverloadCandidateSet*, clang::OverloadCandidate**, clang::OverloadingResult, bool) SemaOverload.cpp:0:0
#13 0x000000000711c6a4 clang::Sema::BuildOverloadedCallExpr(clang::Scope*, clang::Expr*, clang::UnresolvedLookupExpr*, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, clang::Expr*, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x711c6a4)
#14 0x0000000006c8d868 clang::Sema::BuildCallExpr(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, clang::Expr*, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6c8d868)
#15 0x0000000006c8fdcc clang::Sema::ActOnCallExpr(clang::Scope*, clang::Expr*, clang::SourceLocation, llvm::MutableArrayRef<clang::Expr*>, clang::SourceLocation, clang::Expr*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6c8fdcc)
#16 0x00000000066fb5ad clang::Parser::ParsePostfixExpressionSuffix(clang::ActionResult<clang::Expr*, true>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66fb5ad)
#17 0x00000000066f3f71 clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, bool&, clang::Parser::TypeCastState, bool, bool*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66f3f71)
#18 0x00000000066f60c7 clang::Parser::ParseCastExpression(clang::Parser::CastParseKind, bool, clang::Parser::TypeCastState, bool, bool*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66f60c7)
#19 0x00000000066f6159 clang::Parser::ParseAssignmentExpression(clang::Parser::TypeCastState) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66f6159)
#20 0x00000000066fab79 clang::Parser::ParseExpression(clang::Parser::TypeCastState) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66fab79)
#21 0x000000000677d989 clang::Parser::ParseExprStatement(clang::Parser::ParsedStmtContext) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x677d989)
#22 0x0000000006773cfc clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&, clang::ParsedAttributes&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6773cfc)
#23 0x0000000006774c10 clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 32u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6774c10)
#24 0x0000000006775ae5 clang::Parser::ParseCompoundStatementBody(bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6775ae5)
#25 0x000000000677723a clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x677723a)
#26 0x000000000668adc3 clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x668adc3)
#27 0x00000000066bf47d 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+++0x66bf47d)
#28 0x000000000667eb0e clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x667eb0e)
#29 0x000000000667f2ce clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x667f2ce)
#30 0x0000000006686a63 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6686a63)
#31 0x000000000668794d clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x668794d)
#32 0x0000000006687df0 clang::Parser::ParseFirstTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6687df0)
#33 0x0000000006679e32 clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6679e32)
#34 0x000000000452ff28 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x452ff28)
#35 0x00000000047eb1e9 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x47eb1e9)
#36 0x0000000004769cde clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4769cde)
#37 0x00000000048d08be clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x48d08be)
#38 0x0000000000cde37f cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xcde37f)
#39 0x0000000000cd607a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#40 0x0000000004573c49 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 0x0000000003b05dc4 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3b05dc4)
#42 0x000000000457423f 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 0x0000000004539b3d clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4539b3d)
#44 0x000000000453ac2d 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+++0x453ac2d)
#45 0x0000000004542555 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4542555)
#46 0x0000000000cdb23f clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xcdb23f)
#47 0x0000000000baa334 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xbaa334)
#48 0x0000713a84829d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#49 0x0000713a84829e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#50 0x0000000000cd5b2e _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xcd5b2e)
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/ebY8s1oMP
This simple invalid code will crash on Clang Assertion Trunk:
It seems that this goes back to clang-19.
Stack dump: