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User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.0.3705; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.5.20404)

Description of problem:
/*
This shows a Gnu compiler bug. The Intel Linux compiler and the latest
Microsoft (MSVC++ 2008) compiler give an error but Gnu does not.

Stroustrup's C++ Programming Language 3rd edition, section 15.3.2 says:
If B is a protected base ... Only friends and members of D and friends
and members of class derived from D can convert D* to a B*.

In this example Base is a protected base and Base is not derived
from Derived so this should get an error.
*/

struct Base
{
    void baseFunction() ;
};

// g++ gives an error if Base is private -- but not protected
class Derived : protected Base // no error with g++
{};

void Base::baseFunction()
{
  Derived* dp = 0;
  Base* bp = 0;
  bp = dp;
}


Version-Release number of selected component (if applicable):
gcc version 4.1.1 20070105 

How reproducible:
Always


Steps to Reproduce:
1. g++ bug.cpp
2.
3.

Actual Results:

I did not see a compilation error.

Expected Results:

I should have seen an error similar to this one from the Intel compiler:

tr78887a.cpp(26): error #312: conversion to inaccessible base class "Base" is not allowed
    bp = dp;
         ^



Additional info: