c++/3869: Segmentation fault on specialized outer template with inner member template

[Wolfgang Bangerth]

This is a reduced testcase:
---------------------------------------
template <int> struct Outer {
   template<typename> struct Inner {
      typedef int Result;
   };
};

template<>     struct Outer<0> {
   template<typename> struct Inner {
      typedef int Result;
   };
};

template<int flag> struct Select {
   typedef typename Outer<flag>::Inner<int>::Result Result;
};

typedef Select<1>::Result Int;
--------------------------------------

It fails with a segfault.

W.

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Wolfgang Bangerth              email:           bangerth@ticam.utexas.edu
                               www: http://www.ticam.utexas.edu/~bangerth