internal compiler error on egcs 2.91.57

[davide_dell_aquila@libero.it]

> version:
> 2.91.57
> 
> system:
> cygwin and  linux
> 
> command line:
> g++  error.cpp
> 
> program:
> //////BEGIN error.cpp 
> template<class T> struct A{
>     template<class T2> struct B{};
> };
> 
> int
> main(){
>     A<char>::template B<int> a;    
> }
> ////////END error.cpp
> 
> compiler message:
> Internal compiler error