Clang ICE: invalid parameter index on some attributes with invalid indices applied to varargs functions · Issue #61635 · llvm/llvm-project (original) (raw)
This is a fuzzer-generated bug. Feel free to close if you're not interested in such reports. If you would like more reports of fuzzer-generated bugs, let me know and I can post them. I read the bug report guidelines, and did not find information on whether or not fuzzer-generated bugs were welcome.
Clang crashes on this program:
attribute ((format_arg(2))) void test (int i, ...) { }
with this message (Godbolt):
clang++: /root/llvm-project/clang/include/clang/AST/Type.h:4249: clang::QualType clang::FunctionProtoType::getParamType(unsigned int) const: Assertion `i < getNumParams() && "invalid parameter index"' 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 -S --gcc-toolchain=/opt/compiler-explorer/gcc-snapshot -fcolor-diagnostics -fno-crash-diagnostics -c -O0 1. :2:24: current parser token '{' #0 0x000055767e07d78f llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x400478f) #1 0x000055767e07b4cc llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x40024cc) #2 0x000055767dfc8b38 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0 #3 0x00007f6519e42420 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x14420) #4 0x00007f651990f00b raise (/lib/x86_64-linux-gnu/libc.so.6+0x4300b) #5 0x00007f65198ee859 abort (/lib/x86_64-linux-gnu/libc.so.6+0x22859) #6 0x00007f65198ee729 (/lib/x86_64-linux-gnu/libc.so.6+0x22729) #7 0x00007f65198fffd6 (/lib/x86_64-linux-gnu/libc.so.6+0x33fd6) #8 0x0000557680ac32d5 getFunctionOrMethodParamType(clang::Decl const*, unsigned int) SemaDeclAttr.cpp:0:0 #9 0x0000557680af2357 handleFormatArgAttr(clang::Sema&, clang::Decl*, clang::ParsedAttr const&) SemaDeclAttr.cpp:0:0 #10 0x0000557680b1dcee ProcessDeclAttribute(clang::Sema&, clang::Scope*, clang::Decl*, clang::ParsedAttr const&, clang::Sema::ProcessDeclAttributeOptions const&) (.isra.0) SemaDeclAttr.cpp:0:0 #11 0x0000557680b1ebeb clang::Sema::ProcessDeclAttributes(clang::Scope*, clang::Decl*, clang::Declarator const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6aa5beb) #12 0x0000557680ab5470 clang::Sema::ActOnFunctionDeclarator(clang::Scope*, clang::Declarator&, clang::DeclContext*, clang::TypeSourceInfo*, clang::LookupResult&, llvm::MutableArrayRefclang::TemplateParameterList*, bool&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a3c470) #13 0x0000557680abb0cf clang::Sema::HandleDeclarator(clang::Scope*, clang::Declarator&, llvm::MutableArrayRefclang::TemplateParameterList*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a420cf) #14 0x0000557680abbc13 clang::Sema::ActOnStartOfFunctionDef(clang::Scope*, clang::Declarator&, llvm::MutableArrayRefclang::TemplateParameterList*, clang::Sema::SkipBodyInfo*, clang::Sema::FnBodyKind) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6a42c13) #15 0x0000557680754792 clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66db792) #16 0x00005576807805a0 clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::ParsedAttributes&, clang::SourceLocation*, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x67075a0) #17 0x00005576807486f2 clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66cf6f2) #18 0x0000557680748faf clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (.part.0) Parser.cpp:0:0 #19 0x000055768074fa39 clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66d6a39) #20 0x000055768075038d clang::Parser::ParseTopLevelDecl(clang::OpaquePtrclang::DeclGroupRef&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66d738d) #21 0x0000557680750854 clang::Parser::ParseFirstTopLevelDecl(clang::OpaquePtrclang::DeclGroupRef&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66d7854) #22 0x000055768074422a clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x66cb22a) #23 0x000055767f2a4798 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x522b798) #24 0x000055767eb09979 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4a90979) #25 0x000055767ea8dea6 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4a14ea6) #26 0x000055767ebedb37 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4b74b37) #27 0x000055767b608ef6 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x158fef6) #28 0x000055767b604d1a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0 #29 0x000055767e8eeb0d void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optionalllvm::StringRef>, std::__cxx11::basic_string<char, std::char_traits, std::allocator>, bool) const::'lambda'()>(long) Job.cpp:0:0 #30 0x000055767dfc9020 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3f50020) #31 0x000055767e8ef3cf clang::driver::CC1Command::Execute(llvm::ArrayRef<std::optionalllvm::StringRef>, std::__cxx11::basic_string<char, std::char_traits, std::allocator>, bool) const (.part.0) Job.cpp:0:0 #32 0x000055767e8b6c0c clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x483dc0c) #33 0x000055767e8b76ad 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+++0x483e6ad) #34 0x000055767e8bf35d clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x484635d) #35 0x000055767b6073a0 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x158e3a0) #36 0x000055767b5134b5 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x149a4b5) #37 0x00007f65198f0083 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x24083) #38 0x000055767b5ffa2e _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x1586a2e) clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation) Compiler returned: 134
This looks like a Clang problem, because it still happens with -emit-llvm -Xclang -disable-llvm-passes.
I searched like so for duplicates, but didn't find any: