libstdc++/9858: Extra virtual functions in ctype<char>

[peturr02 at ru dot is]

>Number:         9858
>Category:       libstdc++
>Synopsis:       Extra virtual functions in ctype<char>
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Feb 26 09:06:01 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     peturr02 at ru dot is
>Release:        gcc-3.2.1
>Organization:
>Environment:
Red Hat Linux 8.0
>Description:
ctype<char> has some non-standard virtual functions, for example bool do_is(mask, char).
>How-To-Repeat:
See attachment.
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
----gnatsweb-attachment----
Content-Type: text/plain; name="ctypebug2.cc"
Content-Disposition: inline; filename="ctypebug2.cc"

#include <locale>

#undef NDEBUG
#include <cassert>

bool called = false;

class Derived : public std::ctype<char>
{
public:
	bool do_is(mask, char_type) const { }
};

class Derived2 : public Derived
{
public:
	bool do_is(mask, char_type) const { called = true; }
};

int main()
{
	Derived2 d2;
	const Derived& dr = d2;
	called = false;
	dr.do_is(std::ctype_base::space, 'a');
	assert(!called);

	return 0;
}