Re: Pure virtual function call in Winamp?

From:
Juha Nieminen <nospam@thanks.invalid>
Newsgroups:
comp.lang.c++
Date:
Fri, 23 Oct 2009 17:18:54 +0300
Message-ID:
<hbse0s$2su2$1@adenine.netfront.net>
Alf P. Steinbach wrote:

http://www.well.com/~lonewolf/pure-virtual.jpg


I think it's possibly due to some malware, but most probably a Windows
update, infesting your system during the last 7 days.

It has nothing to do with WinAmp specifically; it's something affecting
the Microsoft C++ runtime DLL.


  Don't be ridiculous. A "pure virtual call" runtime error is easy to
reproduce in any C++ program. For example:

//--------------------------------------------------------------------------
#include <iostream>

class A
{
 public:
    virtual void foo() = 0;
    void bar() { foo(); }
    ~A() { bar(); }
};

class B: public A
{
 public:
    virtual void foo() { std::cout << "B::foo()\n"; }
};

int main()
{
    B b;
}
//--------------------------------------------------------------------------

  When run on a linux system, that program produces:

pure virtual method called
terminate called without an active exception

  So it is perfectly possible that the bug is in WinAmp.

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