[Bug 6399] Crash with debugging tools of Gameboy Advance emulator "Visualboy Advance"

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=6399


mike(a)codeweavers.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1




------- Additional Comments From mike(a)codeweavers.com  2006-08-10 12:12 -------
0009:CALL MFC42.5788(00000060) ret=004e79a0
trace:seh:raise_exception code=c0000005 flags=0 addr=0x6c3c01b3

MFC42.5788 is CPen *CDC::SelectObject(CPen *);
A bad pointer is being passed as a CPen, so the program is crashing.

The source for this project is available on SourceForge.
Examining the relay trace, it looks like the crash is at:
gba/VisualBoyAdvance-1.7/src/win32/ZoomControl.cpp #144

  CPen pen;
  pen.CreatePen(PS_SOLID, 1, RGB(192,192,192));
  CPen *old = (CPen *)memDC.SelectObject(pen);
  
  for(i = 0; i < 8; i++) {
    memDC.MoveTo(0, i * multY);
    memDC.LineTo(w, i * multY);
    memDC.MoveTo(i * multX, 0);
    memDC.LineTo(i * multX, h);
  } 
  
  if(selected != -1) {   <---- looks like this condition is false
    CPen pen2;
    pen2.CreatePen(PS_SOLID, 2, RGB(255, 0, 0));
    CPen *old2 = (CPen*)memDC.SelectObject(&pen2);
    
    int startX = (selected & 7)*multX+1;
    int startY = (selected / 8)*multY+1;
    int endX = startX + multX-2;
    int endY = startY + multY-2;
    
    memDC.MoveTo(startX, startY);
    memDC.LineTo(endX, startY);
    memDC.LineTo(endX, endY);
    memDC.LineTo(startX, endY);
    memDC.LineTo(startX, startY-1);
    memDC.SelectObject(old2);
    pen2.DeleteObject();
  }
  memDC.SelectObject(old);  <----- looks like it crashes here.
  pen.DeleteObject();

The relay trace for this section of code shows nothing obviously wrong, however
it seems the problem must be in something called here, as the variable "old" is
initialized at the top of the section...


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