Parsers assertion fail after mistyped `_For_any` declaration

[john-h-kastner]

_Forany(T) void foo(void);
_For_any(T) void bar(void);

It looks like the first (mistyped) declaration is parsed as a K&R style prototype for a function _Forany, so it expects the following lines to be parameter declarations. Something about encountering _For_any in that context causes an assertion to fail.

for_any_typo.c:1:17: error: parameter named 'foo' is missing
_Forany(T) void foo(void);
                ^
clang: /home/john/checkedc-clang/clang/lib/Sema/SemaDecl.cpp:14281: clang::ParmVarDecl* clang::Sema::ActOnParamDeclarator(clang::Scope*, clang::Declarator&): Assertion `S->isFunctionPrototypeScope()' failed.
PLEASE submit a bug report to https://github.com/Microsoft/checkedc-clang/issues and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: clang -c for_any_typo.c 
1.	for_any_typo.c:2:27: current parser token ';'
 #0 0x0000562844fb1381 llvm::sys::PrintStackTrace(llvm::raw_ostream&) /home/john/checkedc-clang/llvm/build/../lib/Support/Unix/Signals.inc:564:22
 #1 0x0000562844fb1418 PrintStackTraceSignalHandler(void*) /home/john/checkedc-clang/llvm/build/../lib/Support/Unix/Signals.inc:625:1
 #2 0x0000562844faf16b llvm::sys::RunSignalHandlers() /home/john/checkedc-clang/llvm/build/../lib/Support/Signals.cpp:68:20
 #3 0x0000562844fb0b87 llvm::sys::CleanupOnSignal(unsigned long) /home/john/checkedc-clang/llvm/build/../lib/Support/Unix/Signals.inc:361:31
 #4 0x0000562844ef1728 (anonymous namespace)::CrashRecoveryContextImpl::HandleCrash(int, unsigned long) /home/john/checkedc-clang/llvm/build/../lib/Support/CrashRecoveryContext.cpp:77:5
 #5 0x0000562844ef1c1a CrashRecoverySignalHandler(int) /home/john/checkedc-clang/llvm/build/../lib/Support/CrashRecoveryContext.cpp:383:1
 #6 0x00007fc006da23c0 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x153c0)
 #7 0x00007fc00684218b raise /build/glibc-eX1tMB/glibc-2.31/signal/../sysdeps/unix/sysv/linux/raise.c:51:1
 #8 0x00007fc006821859 abort /build/glibc-eX1tMB/glibc-2.31/stdlib/abort.c:81:7
 #9 0x00007fc006821729 get_sysdep_segment_value /build/glibc-eX1tMB/glibc-2.31/intl/loadmsgcat.c:509:8
#10 0x00007fc006821729 _nl_load_domain /build/glibc-eX1tMB/glibc-2.31/intl/loadmsgcat.c:970:34
#11 0x00007fc006832f36 (/lib/x86_64-linux-gnu/libc.so.6+0x36f36)
#12 0x00005628485880cc clang::Sema::ActOnParamDeclarator(clang::Scope*, clang::Declarator&) /home/john/checkedc-clang/clang/lib/Sema/SemaDecl.cpp:14282:3
#13 0x000056284803e637 clang::Parser::ParseKNRParamDeclarations(clang::Declarator&) /home/john/checkedc-clang/clang/lib/Parse/Parser.cpp:1482:37
#14 0x000056284803d15e clang::Parser::ParseFunctionDefinition(clang::ParsingDeclarator&, clang::Parser::ParsedTemplateInfo const&, clang::Parser::LateParsedAttrList*) /home/john/checkedc-clang/clang/lib/Parse/Parser.cpp:1205:25
#15 0x000056284805cd31 clang::Parser::ParseDeclGroup(clang::ParsingDeclSpec&, clang::DeclaratorContext, clang::SourceLocation*, clang::Parser::ForRangeInit*) /home/john/checkedc-clang/clang/lib/Parse/ParseDecl.cpp:2013:36
#16 0x000056284803ce74 clang::Parser::ParseDeclOrFunctionDefInternal(clang::Parser::ParsedAttributesWithRange&, clang::ParsingDeclSpec&, clang::AccessSpecifier) /home/john/checkedc-clang/clang/lib/Parse/Parser.cpp:1138:59
#17 0x000056284803cf67 clang::Parser::ParseDeclarationOrFunctionDefinition(clang::Parser::ParsedAttributesWithRange&, clang::ParsingDeclSpec*, clang::AccessSpecifier) /home/john/checkedc-clang/clang/lib/Parse/Parser.cpp:1154:57
#18 0x000056284803c2d1 clang::Parser::ParseExternalDeclaration(clang::Parser::ParsedAttributesWithRange&, clang::ParsingDeclSpec*) (.localalias) /home/john/checkedc-clang/clang/lib/Parse/Parser.cpp:956:58
#19 0x000056284803b42a clang::Parser::ParseTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&, bool) /home/john/checkedc-clang/clang/lib/Parse/Parser.cpp:704:42
#20 0x000056284803adc9 clang::Parser::ParseFirstTopLevelDecl(clang::OpaquePtr<clang::DeclGroupRef>&) /home/john/checkedc-clang/clang/lib/Parse/Parser.cpp:572:43
#21 0x0000562848036d0a clang::ParseAST(clang::Sema&, bool, bool) /home/john/checkedc-clang/clang/lib/Parse/ParseAST.cpp:157:47
#22 0x0000562845c02b11 clang::ASTFrontendAction::ExecuteAction() /home/john/checkedc-clang/clang/lib/Frontend/FrontendAction.cpp:1057:11
#23 0x000056284657f7e3 clang::CodeGenAction::ExecuteAction() /home/john/checkedc-clang/clang/lib/CodeGen/CodeGenAction.cpp:1185:1
#24 0x0000562845c02468 clang::FrontendAction::Execute() /home/john/checkedc-clang/clang/lib/Frontend/FrontendAction.cpp:954:38
#25 0x0000562845b92d6f clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) /home/john/checkedc-clang/clang/lib/Frontend/CompilerInstance.cpp:984:42
#26 0x0000562845d9e4db clang::ExecuteCompilerInvocation(clang::CompilerInstance*) /home/john/checkedc-clang/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp:278:38
#27 0x000056284363c91b cc1_main(llvm::ArrayRef<char const*>, char const*, void*) /home/john/checkedc-clang/clang/tools/driver/cc1_main.cpp:240:40
#28 0x00005628436317e3 ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&) /home/john/checkedc-clang/clang/tools/driver/driver.cpp:330:20
#29 0x0000562845a88659 clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optional<llvm::StringRef> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, bool*) const::'lambda'()::operator()() const /home/john/checkedc-clang/clang/lib/Driver/Job.cpp:400:32
#30 0x0000562845a88f22 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optional<llvm::StringRef> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, bool*) const::'lambda'()>(long) /home/john/checkedc-clang/llvm/include/llvm/ADT/STLExtras.h:186:40
#31 0x0000562844ee4636 llvm::function_ref<void ()>::operator()() const /home/john/checkedc-clang/llvm/build/../include/llvm/ADT/STLExtras.h:203:62
#32 0x0000562844ef1e2c llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) /home/john/checkedc-clang/llvm/build/../lib/Support/CrashRecoveryContext.cpp:419:10
#33 0x0000562845a88881 clang::driver::CC1Command::Execute(llvm::ArrayRef<llvm::Optional<llvm::StringRef> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >*, bool*) const /home/john/checkedc-clang/clang/lib/Driver/Job.cpp:400:7
#34 0x0000562845a3b6af clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&) const /home/john/checkedc-clang/clang/lib/Driver/Compilation.cpp:195:22
#35 0x0000562845a3ba12 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*> >&) const /home/john/checkedc-clang/clang/lib/Driver/Compilation.cpp:246:53
#36 0x0000562845a4b8c2 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::pair<int, clang::driver::Command const*> >&) /home/john/checkedc-clang/clang/lib/Driver/Driver.cpp:1509:28
#37 0x00005628436327b7 main /home/john/checkedc-clang/clang/tools/driver/driver.cpp:502:39
#38 0x00007fc0068230b3 __libc_start_main /build/glibc-eX1tMB/glibc-2.31/csu/../csu/libc-start.c:342:3
#39 0x000056284362fe7e _start (/home/john/checkedc-clang/llvm/build/bin/clang-11+0x2601e7e)