[clang] Assertion `!Filename.empty()' failed. #162951
Description
Reproducer:
https://godbolt.org/z/r5cexGjG5
#embed <>Backtrace:
clang++: /root/llvm-project/llvm/tools/clang/lib/Lex/PPDirectives.cpp:3996: void clang::Preprocessor::HandleEmbedDirective(clang::SourceLocation, clang::Token&, const clang::FileEntry*): Assertion `!Filename.empty()' 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++ -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>:1:2: current parser token 'embed'
#0 0x00000000041e14e8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x41e14e8)
#1 0x00000000041de914 llvm::sys::CleanupOnSignal(unsigned long) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x41de914)
#2 0x0000000004123268 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
#3 0x0000797becc42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#4 0x0000797becc969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#5 0x0000797becc42476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#6 0x0000797becc287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#7 0x0000797becc2871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
#8 0x0000797becc39e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#9 0x00000000080e0517 clang::Preprocessor::HandleEmbedDirective(clang::SourceLocation, clang::Token&, clang::FileEntry const*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x80e0517)
#10 0x00000000080ec767 clang::Preprocessor::HandleDirective(clang::Token&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x80ec767)
#11 0x000000000808900a clang::Lexer::LexTokenInternal(clang::Token&, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x808900a)
#12 0x000000000808b2ce clang::Lexer::Lex(clang::Token&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x808b2ce)
#13 0x00000000081316ac clang::Preprocessor::Lex(clang::Token&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x81316ac)
#14 0x00000000068cfc32 clang::Parser::ConsumeToken() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x68cfc32)
#15 0x00000000068bcd28 clang::ParseAST(clang::Sema&, bool, bool) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x68bcd28)
#16 0x0000000004b25988 clang::CodeGenAction::ExecuteAction() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4b25988)
#17 0x0000000004e11975 clang::FrontendAction::Execute() (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4e11975)
#18 0x0000000004d930ae clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4d930ae)
#19 0x0000000004f08c2d clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4f08c2d)
#20 0x0000000000dbf5b0 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xdbf5b0)
#21 0x0000000000db611a ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>) driver.cpp:0:0
#22 0x0000000000db629d int llvm::function_ref<int (llvm::SmallVectorImpl<char const*>&)>::callback_fn<clang_main(int, char**, llvm::ToolContext const&)::'lambda'(llvm::SmallVectorImpl<char const*>&)>(long, llvm::SmallVectorImpl<char const*>&) driver.cpp:0:0
#23 0x0000000004b8eb29 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
#24 0x0000000004123704 llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4123704)
#25 0x0000000004b8f13f 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
#26 0x0000000004b50442 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4b50442)
#27 0x0000000004b513ee 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+++0x4b513ee)
#28 0x0000000004b58b25 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*>>&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0x4b58b25)
#29 0x0000000000dbbad9 clang_main(int, char**, llvm::ToolContext const&) (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xdbbad9)
#30 0x0000000000c6bad4 main (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xc6bad4)
#31 0x0000797becc29d90 (/lib/x86_64-linux-gnu/libc.so.6+0x29d90)
#32 0x0000797becc29e40 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29e40)
#33 0x0000000000db5bb5 _start (/opt/compiler-explorer/clang-assertions-trunk/bin/clang+++0xdb5bb5)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
Compiler returned: 134