c++/6659: segfault if constructor of a nested template class is decalared with a return argument

[santugi@dptmaths.ens-cachan.fr]

>Number:         6659
>Category:       c++
>Synopsis:       segfault if constructor of a nested template class is decalared with a return argument
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue May 14 11:36:00 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     santugi@dptmaths.ens-cachan.fr
>Release:        unknown-1.0
>Organization:
>Environment:
Freebsd 4.5
>Description:
If a template class contains a nested class. The illegal declaration of a 
constructor of the latter can cause a segfault if the constructor is said 
to have a return value.
>How-To-Repeat:
compile the following with option -c

template<class T>
class A{
  T a;
  class B{
      T b;
  };
};

template<class T>
A<T>::B& 
A<T>::B::B(const B& __B){} 
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: