[LLVMbugs] [Bug 13022] New: [Windows] Can't compile `int (test)(); `

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=13022

             Bug #: 13022
           Summary: [Windows] Can't compile `int (test)();`
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: timurrrr at google.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified


$ cat zz.cpp
int (test)();
void foo() { int z = test(); }

clang is r157687

$ clang++ -Xclang -cxx-abi -Xclang microsoft -c zz.cpp
Assertion failed: isa<X>(Val) && "cast<Ty>() argument of incompatible type!",
file C:\src\llvm\include\llvm/Support/Casting.h, line 198

$ clang++ -c zz.cpp
-> OK

$ cl -c zz.cpp
-> OK

The assertion happens at:
void MicrosoftCXXNameMangler::mangleFunctionEncoding(const FunctionDecl *FD) {
  ...

  // We should never ever see a FunctionNoProtoType at this point.
  // We don't even know how to mangle their types anyway :).
  const FunctionProtoType *FT = cast<FunctionProtoType>(FD->getType());   <<<<
HERE

Looks like some unexpected type comes here.

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