🚀 go-pugleaf

I have following problems with gcc.

While compiling the following program ( actually part of a big program
but shortened for convinience) it does'nt complain anything but while executing
it gives a BUS error. However if I interchange the position of xdisp and coord
in the definition of xwin, (i.e. class xwin: virtual public coord, virtual
public xdisp{.... ) it works fine!. Can somebody tell me what is going on.
I could not find anything from the gdb. I am using gcc2.2.2. I understand
that I didn't have to use virtual classes, but I guess it is syntactically okay!
Any feedback will be appreciated!!

 
class coord{
 public:
    double ctm[6]; 
    coord();
};

//--------------------------------------------------------

class xdisp{
  
public:
  xdisp();
};

//------------------------------------------------------------

class xwin: virtual public xdisp, virtual public coord{

public:
  xwin();

};

//----------------------------------------------------------



main()
{
        xwin tryme;
}


xwin::xwin():xdisp(), coord()
{

}


xdisp::xdisp()
{
}


coord::coord(){
        ctm[0] = (double)1.0;
        ctm[1] = ctm[2] = (double)0.0;
        ctm[4] = (double)1.0;
        ctm[5] = (double)0.0;
} 



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