c++/9410: [3.4 regression] inability to access a base classes' member from a templated derived class

[andrew@andypo.net]

>Number:         9410
>Category:       c++
>Synopsis:       [3.4 regression] inability to access a base classes' member from a templated derived class
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          rejects-legal
>Submitter-Id:   net
>Arrival-Date:   Wed Jan 22 23:06:00 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     Andrew Pollard
>Release:        gcc-3.4-20030122
>Organization:
>Environment:
i686-pc-linux-gnu on RedHat8.0/PIII
>Description:
The following snippet of code no longer compiles.

I'm fairly certain it should compile (but I'm not a language laywer).

Previous versions of gcc compile it (including gcc-3.4-20030116)

hidden.cxx:
-----------
struct A {
    int a;
};

template<typename T>
struct B : public A {
};

template<typename T>
struct C : public B<T> {
    int foo() { return (a); }
    int bar() { return (this->a); }
};
----------

% g++34 hidden.cxx -c
hidden.cxx: In member function `int C<T>::foo()':
hidden.cxx:11: error: `a' has not been declared

Note how the use with (this->a) works. From a language point of view I would have expected both to work or both to fail.

Is this a bug, or just another inability of mine to understand the complexity of templates in C++?
>How-To-Repeat:

>Fix:

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