c++/5658: Regression on redefinition of a type in a derived class.

[Theodore.Papadopoulo@sophia.inria.fr]

>Number:         5658
>Category:       c++
>Synopsis:       Regression on redefinition of a type in a derived class.
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          rejects-legal
>Submitter-Id:   net
>Arrival-Date:   Mon Feb 11 11:36:01 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Theodore Papadopoulo
>Release:        unknown-1.0
>Organization:
>Environment:
i686-pc-linux-gnu
Linux 2.2.18
>Description:
This is a regression from 3.0 or gcc version 3.1 20011022.
The following minimal example now fails to compile.
This might be related to the correction of C++ bug 72.

What is really strange is that if the constructor for B is removed, then everything is compiling again. 

vanuatu->g++ TemplateInheritance.C 
TemplateInheritance.C: In instantiation of `B<T>::B() [with T = int]':
TemplateInheritance.C:18:   instantiated from here
TemplateInheritance.C:14: declaration of `template<class U> struct 
   B<int>::iterator'
TemplateInheritance.C:12: conflicts with previous declaration `template<class 
   U> struct B<int>::iterator'
TemplateInheritance.C:14: declaration of `template<class U> struct 
   B<int>::iterator'
TemplateInheritance.C:12: conflicts with previous declaration `template<class 
   U> struct B<int>::iterator'
TemplateInheritance.C:14: declaration of `template<class U> struct 
   B<int>::iterator'
TemplateInheritance.C:12: conflicts with previous declaration `template<class 
   U> struct B<int>::iterator'
>How-To-Repeat:
Just compile the program above with a recent compiler.
>Fix:
I did not find one, that is why I believe the problem is serious.
>Release-Note:
>Audit-Trail:
>Unformatted:
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