[Bug c++/30097] New: Access control fails on nested protected base member

[stefan dot gotz at intel dot com]

Protected members of a base class are accessible in derived class if nested too
deeply:

class base_t {
protected:
    unsigned x;
    union {
        unsigned y;
        struct {
            unsigned z;
        };
    };
};

class child_t : public base_t {
public:
    void foo () {
        base_t base;
        base.x = 0;  // access denied (ok)
        base.y = 0;  // access denied (ok)
        base.z = 0;  // access permitted (not ok)
    };
};

compiling the above produces the following output:

In member function `void child_t::foo()':
4: error: `unsigned int base_t::x' is protected
19: error: within this context
6: error: `unsigned int base_t::<anonymous union>::y' is protected
20: error: within this context


-- 
           Summary: Access control fails on nested protected base member
           Product: gcc
           Version: 4.1.2
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: stefan dot gotz at intel dot com
 GCC build triplet: i686-linux-gnu
  GCC host triplet: i686-linux-gnu
GCC target triplet: i486-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30097