Bug#554962: Segmentation fault in glGetError

[Xavier Glattard <xavier.glattard@online.fr>]

Package: libgl1-mesa-glx
Version: 7.6-1_i386

I'm playing with OpenGL and GNUstep (from svn) and write a small app 
based on glxgears. I just update Mesa from stable to testing. My app 
runs fine with stable packages; with testing packages, I get:

xavier@mdvx-2:~/src/Gears$ openapp ./Gears
2009-11-07 15:40:48.829 Gears[12139] XShm pixmaps not supported by X server.
2009-11-07 15:40:48.829 Gears[12139] Falling back to normal XImage: s 
(will be slower).
Erreur de segmentation


xavier@mdvx-2:~/src/Gears$ debugapp ./Gears
[Thread debugging using libthread_db enabled]
[New Thread 0xb711a6e0 (LWP 12275)]
2009-11-07 15:40:59.802 Gears[12275] XShm pixmaps not supported by X server.
2009-11-07 15:40:59.803 Gears[12275] Falling back to normal XImage: s 
(will be slower).

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb711a6e0 (LWP 12275)]
0xb7f1d546 in glGetError () at ../../../src/mesa/x86/glapi_x86.S:415
415     ../../../src/mesa/x86/glapi_x86.S: No such file or directory.
        in ../../../src/mesa/x86/glapi_x86.S
Current language:  auto; currently asm
(gdb) bt
#0  0xb7f1d546 in glGetError () at ../../../src/mesa/x86/glapi_x86.S:415
#1  0xb6f47eeb in -[XGGLPixelFormat drawableForWindow:] (self=0x8cc61b0,
    _cmd=0xb6f67b00, xwindowid=27263009) at XGGLFormat.m:320
#2  0xb6f4a2d6 in -[XGGLContext setView:] (self=0x8cc7aa8, _cmd=0xb7e3c088,
    view=0x8cc4840) at XGGLContext.m:516
#3  0xb7c99999 in -[NSOpenGLView openGLContext] (self=0x8cc4840,
    _cmd=0xb7e3c0e8) at NSOpenGLView.m:140
#4  0xb7c997b1 in -[NSOpenGLView update] (self=0x8cc4840, _cmd=0xb7e3c108)
    at NSOpenGLView.m:208
#5  0xb7c99e3e in -[NSOpenGLView _viewDidMoveToWindow] (self=0x8cc4840,
    _cmd=0xb7e7c3e8) at NSOpenGLView.m:270
#6  0xb7d275ff in -[NSView addSubview:positioned:relativeTo:] 
(self=0x8c86a78,
    _cmd=0xb7e7c4e8, aView=0x8cc4840, place=NSWindowAbove, otherView=0x0)
    at NSView.m:758
#7  0xb7d2380f in -[NSView addSubview:] (self=0x8c86a78, _cmd=0x8054710,
    aView=0x8cc4840) at NSView.m:696
#8  0x0804c176 in -[GearsWindow 
initWithContentRect:styleMask:backing:defer:]
    () at GearsWindow.m:243
#9  0x0804c4f4 in -[GearsWindow initWithBacking:] (self=0x8c873c8,
    _cmd=0x80530e0, bufferingType=NSBackingStoreBuffered) at 
GearsWindow.m:282
#10 0x0804a167 in -[GearsMain createWindowWithBacking:] (self=0x8b20578,
    _cmd=0x80530f8, backing=NSBackingStoreBuffered) at GearsMain.m:94
#11 0x0804a200 in -[GearsMain applicationDidFinishLaunching:] 
(self=0x8b20578,
---Type <return> to continue, or q <return> to quit---q

The original glxgear runs fine.


The GNUstep code (in XGGLPixelFormat.m) is:

- (GLXWindow) drawableForWindow: (Window)xwindowid
{
  GLint error;
  GLXWindow win;
  MAKE_DISPLAY(dpy);

  if (GSglxMinorVersion(dpy) >= 3)
    {
      win = glXCreateWindow(dpy, configurations.fbconfig[0],
                             xwindowid, NULL);
    }
  else
    {
      win = xwindowid;
    }

  error = glGetError();
  if ( error != GL_NO_ERROR )
      NSDebugMLLog( @"GLX", @"Can not create GL window for pixel format 
%@ - Errror %u",
                            self, error );
  return win;
}


Some gl info:

xavier@mdvx-2:~/src/Gears$ glxinfo 
name of display: :0.0
display: :0  screen: 0
direct rendering: Yes
server glx vendor string: SGI
server glx version string: 1.2
server glx extensions:
(...)
client glx vendor string: SGI
client glx version string: 1.4
client glx extensions:
(...)
GLX version: 1.2
GLX extensions:
(...)
OpenGL vendor string: DRI R300 Project
OpenGL renderer string: Mesa DRI R300 (RV350 4E50) 20090101 AGP 4x 
x86/MMX/SSE2 TCL
OpenGL version string: 1.4 Mesa 7.6
OpenGL extensions:
(...)

Thank !

Xavier