[LLVMbugs] [Bug 10219] New: UNREACHABLE: unexpected type in nested name specifier!

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=10219

           Summary: UNREACHABLE: unexpected type in nested name specifier!
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: zilla at kayari.org
                CC: llvmbugs at cs.uiuc.edu, dgregor at apple.com


struct Nosm 
{
    int m_R;
};

namespace dx {

    struct onc
    {
        typedef void(*Cb)();

        onc(Cb cb);
    };

    struct grac
    {
        template<class Derived> static void once();
    };

    template<class Derived>
        struct tonc : onc
        {
            tonc() : onc(&grac::once<Derived>) {}

            static Derived& get();
        };

    template<class Derived> void grac::once()
    {
        tonc<Derived>::get().h();
    }
}

namespace
{
    template<typename T, int = sizeof(&T::m_R)>
        struct has_R { };

    template<typename T>
        inline void
        setR(T* m, has_R<T>* = 0)
        { }

    inline void setR(...) { }
}

template<typename M>
    struct Qmi
    : dx::tonc<Qmi<M> >
    {
        void h()
        {
            setR(&msg);
        }

        M msg;
    };

Qmi<Nosm> x;

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