[clang] crashes on pragma push_macro (original) (raw)

Reproducer:
https://godbolt.org/z/snbxaecxM

Backtrace:

clang++: /root/llvm-project/llvm/tools/clang/lib/Lex/Preprocessor.cpp:714: clang::IdentifierInfo* clang::Preprocessor::LookUpIdentifierInfo(clang::Token&) const: Assertion `!Identifier.getRawIdentifier().empty() && "No raw identifier data!"' 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 1. :1:2: current parser token 'pragma' #0 0x0000000003fc1498 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3fc1498) #1 0x0000000003fbe8c4 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3fbe8c4) #2 0x0000000003f03098 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0 #3 0x00007b311ea42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520) #4 0x00007b311ea969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc) #5 0x00007b311ea42476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476) #6 0x00007b311ea287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3) #7 0x00007b311ea2871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b) #8 0x00007b311ea39e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96) #9 0x0000000007eb069d (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7eb069d) #10 0x0000000007e98d3f clang::Preprocessor::ParsePragmaPushOrPopMacro(clang::Token&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7e98d3f) #11 0x0000000007ea1732 clang::Preprocessor::HandlePragmaPushMacro(clang::Token&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7ea1732) #12 0x0000000007e9bff7 clang::PragmaNamespace::HandlePragma(clang::Preprocessor&, clang::PragmaIntroducer, clang::Token&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7e9bff7) #13 0x0000000007e9716c clang::Preprocessor::HandlePragmaDirective(clang::PragmaIntroducer) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7e9716c) #14 0x0000000007e6ff4c clang::Preprocessor::HandleDirective(clang::Token&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7e6ff4c) #15 0x0000000007e0dfca clang::Lexer::LexTokenInternal(clang::Token&, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7e0dfca) #16 0x0000000007e101a8 clang::Lexer::Lex(clang::Token&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7e101a8) #17 0x0000000007eb36dc clang::Preprocessor::Lex(clang::Token&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x7eb36dc) #18 0x0000000006668682 clang::Parser::ConsumeToken() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6668682) #19 0x0000000006666288 clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x6666288) #20 0x0000000004970188 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4970188) #21 0x0000000004c64025 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4c64025) #22 0x0000000004be0e6e clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4be0e6e) #23 0x0000000004d57b01 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4d57b01) #24 0x0000000000d9ec4f cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd9ec4f) #25 0x0000000000d9582a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&) driver.cpp:0:0 #26 0x00000000049d7709 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 #27 0x0000000003f03534 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x3f03534) #28 0x00000000049d7d1f 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 #29 0x0000000004999d6d clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4999d6d) #30 0x000000000499adfe 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+++0x499adfe) #31 0x00000000049a3945 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x49a3945) #32 0x0000000000d9b0ff clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd9b0ff) #33 0x0000000000c4f5b4 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc4f5b4) #34 0x00007b311ea29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90) #35 0x00007b311ea29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40) #36 0x0000000000d952d5 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xd952d5) clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation) Compiler returned: 134