[llvm-bugs] [Bug 35355] New: Crash when using class template specialization for inner classes

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=35355

            Bug ID: 35355
           Summary: Crash when using class template specialization for
                    inner classes
           Product: clang
           Version: 5.0
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: jvapen at gmail.com
                CC: dgregor at apple.com, llvm-bugs at lists.llvm.org

The following code crashes the compiler.
When compiling, you do get a warning:  warning: explicit specialization of 'C'
within class scope is a Microsoft extension [-Wmicrosoft-template]

When commenting the class A, one gets extra information before crashing: error:
cannot compile this scalar expression yet

class A {};
A operator+(A, const A &);

template <class T, int i>
struct B
   {
   template <int> struct C {};
   template <> struct C<0>
      {
      static size_t f() { return 0 + T::n; }
      };                  

   virtual size_t f() const { return C<i>::f(); } 
   };

int main(int, char**)
{
   B<int, 0> b{};
}

>> clang++.exe t.cpp

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