Skip to content

Clang trunk crash: infinite macro expansion leads to stack overflow during macro argument expansion #137863

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom
Closed
mariete1223 opened this issue Apr 29, 2025 · 2 comments
Closed

Clang trunk crash: infinite macro expansion leads to stack overflow during macro argument expansion #137863

mariete1223 opened this issue Apr 29, 2025 · 2 comments
Labels
clang:frontend Language frontend issues, e.g. anything involving "Sema" crash Prefer [crash-on-valid] or [crash-on-invalid] duplicate Resolved as duplicate

Comments

@mariete1223
Copy link

Summary

Clang (trunk version) crashes when compiling a C program with heavily nested recursive macro expansions.
Instead of cleanly rejecting the expansion due to excessive depth, the compiler crashes deep inside the preprocessor (TokenLexer::ExpandFunctionArguments) causing a fatal error.

Stack dump

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 -x c -ferror-limit=100 <source>
1.	<source>:16:9 <Spelling=<source>:9:13>: current parser token 'CAT7'
2.	<source>:11:13: parsing function body 'main'
3.	<source>:11:13: in compound statement ('{}')
 #0 0x0000000003f1c8c8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3f1c8c8)
 #1 0x0000000003f1a554 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3f1a554)
 #2 0x0000000003e5f5e6 llvm::CrashRecoveryContext::HandleExit(int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3e5f5e6)
 #3 0x0000000003f11c7e llvm::sys::Process::Exit(int, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3f11c7e)
 #4 0x0000000000da0220 LLVMErrorHandler(void*, char const*, bool) cc1_main.cpp:0:0
 #5 0x0000000003e6a2c3 llvm::report_fatal_error(llvm::Twine const&, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3e6a2c3)
 #6 0x0000000003e6a428 (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3e6a428)
 #7 0x0000000004174efb clang::SourceManager::createExpansionLocImpl(clang::SrcMgr::ExpansionInfo const&, unsigned int, int, unsigned int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4174efb)
 #8 0x000000000417567b clang::SourceManager::createMacroArgExpansionLoc(clang::SourceLocation, clang::SourceLocation, unsigned int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x417567b)
 #9 0x0000000007df022c clang::TokenLexer::updateLocForMacroArgTokens(clang::SourceLocation, clang::Token*, clang::Token*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df022c)
#10 0x0000000007df1b2b clang::TokenLexer::ExpandFunctionArguments() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df1b2b)
#11 0x0000000007df224f clang::TokenLexer::Init(clang::Token&, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df224f)
#12 0x0000000007dade51 clang::Preprocessor::EnterMacro(clang::Token&, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dade51)
#13 0x0000000007dc6319 clang::Preprocessor::HandleMacroExpandedIdentifier(clang::Token&, clang::MacroDefinition const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dc6319)
#14 0x0000000007de5b78 clang::Preprocessor::HandleIdentifier(clang::Token&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de5b78)
#15 0x0000000007de801c clang::Preprocessor::Lex(clang::Token&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de801c)
#16 0x0000000007df384b clang::MacroArgs::getPreExpArgument(unsigned int, clang::Preprocessor&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df384b)
#17 0x0000000007df143d clang::TokenLexer::ExpandFunctionArguments() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df143d)
#18 0x0000000007df224f clang::TokenLexer::Init(clang::Token&, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df224f)
#19 0x0000000007dade51 clang::Preprocessor::EnterMacro(clang::Token&, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dade51)
#20 0x0000000007dc6319 clang::Preprocessor::HandleMacroExpandedIdentifier(clang::Token&, clang::MacroDefinition const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dc6319)
#21 0x0000000007de5b78 clang::Preprocessor::HandleIdentifier(clang::Token&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de5b78)
#22 0x0000000007de801c clang::Preprocessor::Lex(clang::Token&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de801c)
#23 0x0000000007df384b clang::MacroArgs::getPreExpArgument(unsigned int, clang::Preprocessor&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df384b)
#24 0x0000000007df143d clang::TokenLexer::ExpandFunctionArguments() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df143d)
#25 0x0000000007df224f clang::TokenLexer::Init(clang::Token&, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df224f)
#26 0x0000000007dade51 clang::Preprocessor::EnterMacro(clang::Token&, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dade51)
#27 0x0000000007dc6319 clang::Preprocessor::HandleMacroExpandedIdentifier(clang::Token&, clang::MacroDefinition const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dc6319)
#28 0x0000000007de5b78 clang::Preprocessor::HandleIdentifier(clang::Token&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de5b78)
#29 0x0000000007de801c clang::Preprocessor::Lex(clang::Token&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de801c)
#30 0x0000000007df384b clang::MacroArgs::getPreExpArgument(unsigned int, clang::Preprocessor&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df384b)
#31 0x0000000007df143d clang::TokenLexer::ExpandFunctionArguments() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df143d)
#32 0x0000000007df224f clang::TokenLexer::Init(clang::Token&, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df224f)
#33 0x0000000007dade51 clang::Preprocessor::EnterMacro(clang::Token&, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dade51)
#34 0x0000000007dc6319 clang::Preprocessor::HandleMacroExpandedIdentifier(clang::Token&, clang::MacroDefinition const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dc6319)
#35 0x0000000007de5b78 clang::Preprocessor::HandleIdentifier(clang::Token&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de5b78)
#36 0x0000000007de801c clang::Preprocessor::Lex(clang::Token&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de801c)
#37 0x0000000007df384b clang::MacroArgs::getPreExpArgument(unsigned int, clang::Preprocessor&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df384b)
#38 0x0000000007df143d clang::TokenLexer::ExpandFunctionArguments() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df143d)
#39 0x0000000007df224f clang::TokenLexer::Init(clang::Token&, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df224f)
#40 0x0000000007dade51 clang::Preprocessor::EnterMacro(clang::Token&, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dade51)
#41 0x0000000007dc6319 clang::Preprocessor::HandleMacroExpandedIdentifier(clang::Token&, clang::MacroDefinition const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dc6319)
#42 0x0000000007de5b78 clang::Preprocessor::HandleIdentifier(clang::Token&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de5b78)
#43 0x0000000007de801c clang::Preprocessor::Lex(clang::Token&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de801c)
#44 0x0000000007df384b clang::MacroArgs::getPreExpArgument(unsigned int, clang::Preprocessor&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df384b)
#45 0x0000000007df143d clang::TokenLexer::ExpandFunctionArguments() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df143d)
#46 0x0000000007df224f clang::TokenLexer::Init(clang::Token&, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df224f)
#47 0x0000000007dade51 clang::Preprocessor::EnterMacro(clang::Token&, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dade51)
#48 0x0000000007dc6319 clang::Preprocessor::HandleMacroExpandedIdentifier(clang::Token&, clang::MacroDefinition const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dc6319)
#49 0x0000000007de5b78 clang::Preprocessor::HandleIdentifier(clang::Token&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de5b78)
#50 0x0000000007de801c clang::Preprocessor::Lex(clang::Token&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de801c)
#51 0x0000000007df384b clang::MacroArgs::getPreExpArgument(unsigned int, clang::Preprocessor&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df384b)
#52 0x0000000007df143d clang::TokenLexer::ExpandFunctionArguments() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df143d)
#53 0x0000000007df224f clang::TokenLexer::Init(clang::Token&, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df224f)
#54 0x0000000007dade51 clang::Preprocessor::EnterMacro(clang::Token&, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dade51)
#55 0x0000000007dc6319 clang::Preprocessor::HandleMacroExpandedIdentifier(clang::Token&, clang::MacroDefinition const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dc6319)
#56 0x0000000007de5b78 clang::Preprocessor::HandleIdentifier(clang::Token&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de5b78)
#57 0x0000000007de801c clang::Preprocessor::Lex(clang::Token&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de801c)
#58 0x0000000007df384b clang::MacroArgs::getPreExpArgument(unsigned int, clang::Preprocessor&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df384b)
#59 0x0000000007df143d clang::TokenLexer::ExpandFunctionArguments() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df143d)
#60 0x0000000007df224f clang::TokenLexer::Init(clang::Token&, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df224f)
#61 0x0000000007dade51 clang::Preprocessor::EnterMacro(clang::Token&, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dade51)
#62 0x0000000007dc6319 clang::Preprocessor::HandleMacroExpandedIdentifier(clang::Token&, clang::MacroDefinition const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dc6319)
#63 0x0000000007de5b78 clang::Preprocessor::HandleIdentifier(clang::Token&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de5b78)
#64 0x0000000007de801c clang::Preprocessor::Lex(clang::Token&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de801c)
#65 0x0000000006589ee6 clang::Parser::ExpectAndConsumeSemi(unsigned int, llvm::StringRef) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6589ee6)
#66 0x0000000006687c06 clang::Parser::ParseExprStatement(clang::Parser::ParsedStmtContext) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6687c06)
#67 0x000000000667f642 clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector<clang::Stmt*, 24u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&, clang::ParsedAttributes&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x667f642)
#68 0x000000000668056d clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector<clang::Stmt*, 24u>&, clang::Parser::ParsedStmtContext, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x668056d)
#69 0x0000000006688273 clang::Parser::ParseCompoundStatementBody(bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6688273)
#70 0x0000000006688a3a clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6688a3a)
#71 0x0000000006591833 clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6591833)
#72 0x00000000065c78fd 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+++0x65c78fd)
#73 0x000000000658536e clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec&, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x658536e)
#74 0x0000000006585b29 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6585b29)
#75 0x000000000658d44a clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&, clang::ParsedAttributes&, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x658d44a)
#76 0x000000000658e3ed clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, clang::Sema::ModuleImportState&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x658e3ed)
#77 0x00000000065807ca clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x65807ca)
#78 0x00000000048bc388 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x48bc388)
#79 0x0000000004bb0125 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4bb0125)
#80 0x0000000004b2e5ce clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4b2e5ce)
#81 0x0000000004c9f999 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4c9f999)
#82 0x0000000000da28df cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xda28df)
#83 0x0000000000d998ea ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0
#84 0x0000000004922c19 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
#85 0x0000000003e5f524 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3e5f524)
#86 0x000000000492322f 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
#87 0x00000000048e568d clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x48e568d)
#88 0x00000000048e671e 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+++0x48e671e)
#89 0x00000000048ee575 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x48ee575)
#90 0x0000000000d9f628 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd9f628)
#91 0x0000000000c25054 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc25054)
#92 0x00007701c8029d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#93 0x00007701c8029e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#94 0x0000000000d99395 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd99395)
clang++: error: clang frontend command failed with exit code 70 (use -v to see invocation)
Compiler returned: 70

Program

#include <stdlib.h>
#define CAT(x, y) x ## y
#define CAT2(x, y) CAT(x, y)
#define CAT3(x, y) CAT2( CAT2(x, y), CAT2(x, y) )
#define CAT4(x, y) CAT3( CAT3(x, y), CAT2(x, y) )
#define CAT5(x, y) CAT4( CAT4(x, y), CAT2(x, y) )
#define CAT6(x, y) CAT5( CAT5(x, y), CAT2(x, y) )
#define CAT7(x, y) CAT6( CAT6(x, y), CAT2(x, y) )
#define F() CAT7( F, CAT7( F, CAT7( F, CAT7( F, CAT7( F, CAT7( F, END_F ) ) ) ) ) )
#define END_F 0
int main()  {
        int* d = malloc(7 * sizeof(int));
        int* e = malloc(7 * sizeof(int));
        d = (int*)((unsigned long)d % 32);
        e = (int*)((unsigned long)e % 32);
        F()(d, e, 9);

To quickly reproduce

https://gcc.godbolt.org/z/Kh5xdajWs
@llvmbot llvmbot added the clang Clang issues not falling into any other category label Apr 29, 2025
@EugeneZelenko EugeneZelenko added clang:frontend Language frontend issues, e.g. anything involving "Sema" crash Prefer [crash-on-valid] or [crash-on-invalid] and removed clang Clang issues not falling into any other category labels Apr 29, 2025
@llvmbot
Copy link
Member

llvmbot commented Apr 29, 2025

@llvm/issue-subscribers-clang-frontend

Author: None (mariete1223)

## Summary

Clang (trunk version) crashes when compiling a C program with heavily nested recursive macro expansions.
Instead of cleanly rejecting the expansion due to excessive depth, the compiler crashes deep inside the preprocessor (TokenLexer::ExpandFunctionArguments) causing a fatal error.

Stack dump

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 -x c -ferror-limit=100 &lt;source&gt;
1.	&lt;source&gt;:16:9 &lt;Spelling=&lt;source&gt;:9:13&gt;: current parser token 'CAT7'
2.	&lt;source&gt;:11:13: parsing function body 'main'
3.	&lt;source&gt;:11:13: in compound statement ('{}')
 #<!-- -->0 0x0000000003f1c8c8 llvm::sys::PrintStackTrace(llvm::raw_ostream&amp;, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3f1c8c8)
 #<!-- -->1 0x0000000003f1a554 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3f1a554)
 #<!-- -->2 0x0000000003e5f5e6 llvm::CrashRecoveryContext::HandleExit(int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3e5f5e6)
 #<!-- -->3 0x0000000003f11c7e llvm::sys::Process::Exit(int, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3f11c7e)
 #<!-- -->4 0x0000000000da0220 LLVMErrorHandler(void*, char const*, bool) cc1_main.cpp:0:0
 #<!-- -->5 0x0000000003e6a2c3 llvm::report_fatal_error(llvm::Twine const&amp;, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3e6a2c3)
 #<!-- -->6 0x0000000003e6a428 (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3e6a428)
 #<!-- -->7 0x0000000004174efb clang::SourceManager::createExpansionLocImpl(clang::SrcMgr::ExpansionInfo const&amp;, unsigned int, int, unsigned int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4174efb)
 #<!-- -->8 0x000000000417567b clang::SourceManager::createMacroArgExpansionLoc(clang::SourceLocation, clang::SourceLocation, unsigned int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x417567b)
 #<!-- -->9 0x0000000007df022c clang::TokenLexer::updateLocForMacroArgTokens(clang::SourceLocation, clang::Token*, clang::Token*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df022c)
#<!-- -->10 0x0000000007df1b2b clang::TokenLexer::ExpandFunctionArguments() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df1b2b)
#<!-- -->11 0x0000000007df224f clang::TokenLexer::Init(clang::Token&amp;, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df224f)
#<!-- -->12 0x0000000007dade51 clang::Preprocessor::EnterMacro(clang::Token&amp;, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dade51)
#<!-- -->13 0x0000000007dc6319 clang::Preprocessor::HandleMacroExpandedIdentifier(clang::Token&amp;, clang::MacroDefinition const&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dc6319)
#<!-- -->14 0x0000000007de5b78 clang::Preprocessor::HandleIdentifier(clang::Token&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de5b78)
#<!-- -->15 0x0000000007de801c clang::Preprocessor::Lex(clang::Token&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de801c)
#<!-- -->16 0x0000000007df384b clang::MacroArgs::getPreExpArgument(unsigned int, clang::Preprocessor&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df384b)
#<!-- -->17 0x0000000007df143d clang::TokenLexer::ExpandFunctionArguments() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df143d)
#<!-- -->18 0x0000000007df224f clang::TokenLexer::Init(clang::Token&amp;, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df224f)
#<!-- -->19 0x0000000007dade51 clang::Preprocessor::EnterMacro(clang::Token&amp;, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dade51)
#<!-- -->20 0x0000000007dc6319 clang::Preprocessor::HandleMacroExpandedIdentifier(clang::Token&amp;, clang::MacroDefinition const&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dc6319)
#<!-- -->21 0x0000000007de5b78 clang::Preprocessor::HandleIdentifier(clang::Token&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de5b78)
#<!-- -->22 0x0000000007de801c clang::Preprocessor::Lex(clang::Token&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de801c)
#<!-- -->23 0x0000000007df384b clang::MacroArgs::getPreExpArgument(unsigned int, clang::Preprocessor&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df384b)
#<!-- -->24 0x0000000007df143d clang::TokenLexer::ExpandFunctionArguments() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df143d)
#<!-- -->25 0x0000000007df224f clang::TokenLexer::Init(clang::Token&amp;, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df224f)
#<!-- -->26 0x0000000007dade51 clang::Preprocessor::EnterMacro(clang::Token&amp;, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dade51)
#<!-- -->27 0x0000000007dc6319 clang::Preprocessor::HandleMacroExpandedIdentifier(clang::Token&amp;, clang::MacroDefinition const&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dc6319)
#<!-- -->28 0x0000000007de5b78 clang::Preprocessor::HandleIdentifier(clang::Token&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de5b78)
#<!-- -->29 0x0000000007de801c clang::Preprocessor::Lex(clang::Token&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de801c)
#<!-- -->30 0x0000000007df384b clang::MacroArgs::getPreExpArgument(unsigned int, clang::Preprocessor&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df384b)
#<!-- -->31 0x0000000007df143d clang::TokenLexer::ExpandFunctionArguments() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df143d)
#<!-- -->32 0x0000000007df224f clang::TokenLexer::Init(clang::Token&amp;, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df224f)
#<!-- -->33 0x0000000007dade51 clang::Preprocessor::EnterMacro(clang::Token&amp;, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dade51)
#<!-- -->34 0x0000000007dc6319 clang::Preprocessor::HandleMacroExpandedIdentifier(clang::Token&amp;, clang::MacroDefinition const&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dc6319)
#<!-- -->35 0x0000000007de5b78 clang::Preprocessor::HandleIdentifier(clang::Token&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de5b78)
#<!-- -->36 0x0000000007de801c clang::Preprocessor::Lex(clang::Token&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de801c)
#<!-- -->37 0x0000000007df384b clang::MacroArgs::getPreExpArgument(unsigned int, clang::Preprocessor&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df384b)
#<!-- -->38 0x0000000007df143d clang::TokenLexer::ExpandFunctionArguments() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df143d)
#<!-- -->39 0x0000000007df224f clang::TokenLexer::Init(clang::Token&amp;, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df224f)
#<!-- -->40 0x0000000007dade51 clang::Preprocessor::EnterMacro(clang::Token&amp;, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dade51)
#<!-- -->41 0x0000000007dc6319 clang::Preprocessor::HandleMacroExpandedIdentifier(clang::Token&amp;, clang::MacroDefinition const&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dc6319)
#<!-- -->42 0x0000000007de5b78 clang::Preprocessor::HandleIdentifier(clang::Token&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de5b78)
#<!-- -->43 0x0000000007de801c clang::Preprocessor::Lex(clang::Token&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de801c)
#<!-- -->44 0x0000000007df384b clang::MacroArgs::getPreExpArgument(unsigned int, clang::Preprocessor&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df384b)
#<!-- -->45 0x0000000007df143d clang::TokenLexer::ExpandFunctionArguments() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df143d)
#<!-- -->46 0x0000000007df224f clang::TokenLexer::Init(clang::Token&amp;, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df224f)
#<!-- -->47 0x0000000007dade51 clang::Preprocessor::EnterMacro(clang::Token&amp;, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dade51)
#<!-- -->48 0x0000000007dc6319 clang::Preprocessor::HandleMacroExpandedIdentifier(clang::Token&amp;, clang::MacroDefinition const&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dc6319)
#<!-- -->49 0x0000000007de5b78 clang::Preprocessor::HandleIdentifier(clang::Token&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de5b78)
#<!-- -->50 0x0000000007de801c clang::Preprocessor::Lex(clang::Token&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de801c)
#<!-- -->51 0x0000000007df384b clang::MacroArgs::getPreExpArgument(unsigned int, clang::Preprocessor&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df384b)
#<!-- -->52 0x0000000007df143d clang::TokenLexer::ExpandFunctionArguments() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df143d)
#<!-- -->53 0x0000000007df224f clang::TokenLexer::Init(clang::Token&amp;, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df224f)
#<!-- -->54 0x0000000007dade51 clang::Preprocessor::EnterMacro(clang::Token&amp;, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dade51)
#<!-- -->55 0x0000000007dc6319 clang::Preprocessor::HandleMacroExpandedIdentifier(clang::Token&amp;, clang::MacroDefinition const&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dc6319)
#<!-- -->56 0x0000000007de5b78 clang::Preprocessor::HandleIdentifier(clang::Token&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de5b78)
#<!-- -->57 0x0000000007de801c clang::Preprocessor::Lex(clang::Token&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de801c)
#<!-- -->58 0x0000000007df384b clang::MacroArgs::getPreExpArgument(unsigned int, clang::Preprocessor&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df384b)
#<!-- -->59 0x0000000007df143d clang::TokenLexer::ExpandFunctionArguments() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df143d)
#<!-- -->60 0x0000000007df224f clang::TokenLexer::Init(clang::Token&amp;, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7df224f)
#<!-- -->61 0x0000000007dade51 clang::Preprocessor::EnterMacro(clang::Token&amp;, clang::SourceLocation, clang::MacroInfo*, clang::MacroArgs*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dade51)
#<!-- -->62 0x0000000007dc6319 clang::Preprocessor::HandleMacroExpandedIdentifier(clang::Token&amp;, clang::MacroDefinition const&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7dc6319)
#<!-- -->63 0x0000000007de5b78 clang::Preprocessor::HandleIdentifier(clang::Token&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de5b78)
#<!-- -->64 0x0000000007de801c clang::Preprocessor::Lex(clang::Token&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7de801c)
#<!-- -->65 0x0000000006589ee6 clang::Parser::ExpectAndConsumeSemi(unsigned int, llvm::StringRef) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6589ee6)
#<!-- -->66 0x0000000006687c06 clang::Parser::ParseExprStatement(clang::Parser::ParsedStmtContext) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6687c06)
#<!-- -->67 0x000000000667f642 clang::Parser::ParseStatementOrDeclarationAfterAttributes(llvm::SmallVector&lt;clang::Stmt*, 24u&gt;&amp;, clang::Parser::ParsedStmtContext, clang::SourceLocation*, clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x667f642)
#<!-- -->68 0x000000000668056d clang::Parser::ParseStatementOrDeclaration(llvm::SmallVector&lt;clang::Stmt*, 24u&gt;&amp;, clang::Parser::ParsedStmtContext, clang::SourceLocation*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x668056d)
#<!-- -->69 0x0000000006688273 clang::Parser::ParseCompoundStatementBody(bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6688273)
#<!-- -->70 0x0000000006688a3a clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6688a3a)
#<!-- -->71 0x0000000006591833 clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&amp;, clang::Parser::ParsedTemplateInfo const&amp;, clang::Parser::LateParsedAttrList*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6591833)
#<!-- -->72 0x00000000065c78fd clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&amp;, clang::DeclaratorContext, clang::ParsedAttributes&amp;, clang::Parser::ParsedTemplateInfo&amp;, clang::SourceLocation*, clang::Parser::ForRangeInit*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x65c78fd)
#<!-- -->73 0x000000000658536e clang::Parser::ParseDeclOrFunctionDefInternal(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec&amp;, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x658536e)
#<!-- -->74 0x0000000006585b29 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec*, clang::AccessSpecifier) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6585b29)
#<!-- -->75 0x000000000658d44a clang::Parser::ParseExternalDeclaration(clang::ParsedAttributes&amp;, clang::ParsedAttributes&amp;, clang::ParsingDeclSpec*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x658d44a)
#<!-- -->76 0x000000000658e3ed clang::Parser::ParseTopLevelDecl(clang::OpaquePtr&lt;clang::DeclGroupRef&gt;&amp;, clang::Sema::ModuleImportState&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x658e3ed)
#<!-- -->77 0x00000000065807ca clang::ParseAST(clang::Sema&amp;, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x65807ca)
#<!-- -->78 0x00000000048bc388 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x48bc388)
#<!-- -->79 0x0000000004bb0125 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4bb0125)
#<!-- -->80 0x0000000004b2e5ce clang::CompilerInstance::ExecuteAction(clang::FrontendAction&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4b2e5ce)
#<!-- -->81 0x0000000004c9f999 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4c9f999)
#<!-- -->82 0x0000000000da28df cc1_main(llvm::ArrayRef&lt;char const*&gt;, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xda28df)
#<!-- -->83 0x0000000000d998ea ExecuteCC1Tool(llvm::SmallVectorImpl&lt;char const*&gt;&amp;, llvm::ToolContext const&amp;) driver.cpp:0:0
#<!-- -->84 0x0000000004922c19 void llvm::function_ref&lt;void ()&gt;::callback_fn&lt;clang::driver::CC1Command::Execute(llvm::ArrayRef&lt;std::optional&lt;llvm::StringRef&gt;&gt;, std::__cxx11::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt;&gt;*, bool*) const::'lambda'()&gt;(long) Job.cpp:0:0
#<!-- -->85 0x0000000003e5f524 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref&lt;void ()&gt;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3e5f524)
#<!-- -->86 0x000000000492322f clang::driver::CC1Command::Execute(llvm::ArrayRef&lt;std::optional&lt;llvm::StringRef&gt;&gt;, std::__cxx11::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt;&gt;*, bool*) const (.part.0) Job.cpp:0:0
#<!-- -->87 0x00000000048e568d clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&amp;, clang::driver::Command const*&amp;, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x48e568d)
#<!-- -->88 0x00000000048e671e clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&amp;, llvm::SmallVectorImpl&lt;std::pair&lt;int, clang::driver::Command const*&gt;&gt;&amp;, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x48e671e)
#<!-- -->89 0x00000000048ee575 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&amp;, llvm::SmallVectorImpl&lt;std::pair&lt;int, clang::driver::Command const*&gt;&gt;&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x48ee575)
#<!-- -->90 0x0000000000d9f628 clang_main(int, char**, llvm::ToolContext const&amp;) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd9f628)
#<!-- -->91 0x0000000000c25054 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc25054)
#<!-- -->92 0x00007701c8029d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#<!-- -->93 0x00007701c8029e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#<!-- -->94 0x0000000000d99395 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd99395)
clang++: error: clang frontend command failed with exit code 70 (use -v to see invocation)
Compiler returned: 70

Program

#include &lt;stdlib.h&gt;
#define CAT(x, y) x ## y
#define CAT2(x, y) CAT(x, y)
#define CAT3(x, y) CAT2( CAT2(x, y), CAT2(x, y) )
#define CAT4(x, y) CAT3( CAT3(x, y), CAT2(x, y) )
#define CAT5(x, y) CAT4( CAT4(x, y), CAT2(x, y) )
#define CAT6(x, y) CAT5( CAT5(x, y), CAT2(x, y) )
#define CAT7(x, y) CAT6( CAT6(x, y), CAT2(x, y) )
#define F() CAT7( F, CAT7( F, CAT7( F, CAT7( F, CAT7( F, CAT7( F, END_F ) ) ) ) ) )
#define END_F 0
int main()  {
        int* d = malloc(7 * sizeof(int));
        int* e = malloc(7 * sizeof(int));
        d = (int*)((unsigned long)d % 32);
        e = (int*)((unsigned long)e % 32);
        F()(d, e, 9);

To quickly reproduce

https://gcc.godbolt.org/z/Kh5xdajWs

@shafik
Copy link
Collaborator

shafik commented Apr 30, 2025

Duplicate of: #23843

@shafik shafik closed this as completed Apr 30, 2025
@EugeneZelenko EugeneZelenko added the duplicate Resolved as duplicate label Apr 30, 2025
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Assignees
No one assigned
Labels
clang:frontend Language frontend issues, e.g. anything involving "Sema" crash Prefer [crash-on-valid] or [crash-on-invalid] duplicate Resolved as duplicate
Projects
None yet
Milestone
No milestone
Development

No branches or pull requests
4 participants
@shafik @EugeneZelenko @llvmbot @mariete1223