[LLVMbugs] [Bug 6644] New: [C++ CodeGen] Crash with polymorphic class inside extern "C" block

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=6644

           Summary: [C++ CodeGen] Crash with polymorphic class inside
                    extern "C" block
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: dgregor at apple.com
                CC: llvmbugs at cs.uiuc.edu, dgregor at apple.com


blackthorn:clang dgregor$ cat t.C
extern "C" {
  namespace N {
    struct X { 
      virtual void f();
    };
    void X::f() { }
  }
}
blackthorn:clang dgregor$ clang t.C
Assertion failed: (cast<LinkageSpecDecl>(DC)->getLanguage() ==
LinkageSpecDecl::lang_cxx && "Unexpected linkage decl!"), function
IgnoreLinkageSpecDecls, file
/Users/dgregor/Projects/llvm/tools/clang/lib/CodeGen/Mangle.cpp, line 310.
Stack dump:
0.    Program arguments: /Users/dgregor/Projects/llvm-make/bin/clang -cc1
-triple x86_64-apple-darwin10.0.0 -S -disable-free -main-file-name t.C
-pic-level 1 -mdisable-fp-elim -munwind-tables -target-cpu core2 -resource-dir
/Users/dgregor/Projects/llvm-make/lib/clang/1.5 -fmessage-length 80
-stack-protector 1 -fblocks -fexceptions -fdiagnostics-show-option
-fcolor-diagnostics -o
/var/folders/Vf/VfsrpcXeFyKWp16pSa7tMk+++TI/-Tmp-/cc-bwzvzw.s -x c++ t.C 
1.    <eof> parser at end of file
2.    t.C:1:8: LLVM IR generation of declaration
3.    t.C:6:13: Generating code for declaration 'N::X::f'
clang: error: compiler command failed due to signal 6 (use -v to see
invocation)

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