#0  _XSend (dpy=0x804d008, data=0xb7efed10 "GLX", size=3) at ../../src/xcb_io.c:224
  [Error: ../../src/xcb_io.c was not found in source tree]
#1  0xb7c9004b in XQueryExtension (dpy=0x804d008, name=0xb7efed10 "GLX", major_opcode=0xbfc39090, 
#2  0xb7c84d4b in XInitExtension (dpy=0x804d008, name=0xb7efed10 "GLX") at ../../src/InitExt.c:49
  [Error: ../../src/InitExt.c was not found in source tree]
#3  0xb7c48443 in XextAddDisplay (extinfo=0x8053cc0, dpy=0x804d008, ext_name=0xb7efed10 "GLX", 
#4  0xb7ec2974 in ?? () from /usr/lib/libGL.so.1
#5  0x08053cc0 in ?? ()
#6  0x0804d008 in ?? ()
#7  0xb7efed10 in ?? ()
#8  0xb7f0d780 in ?? ()
#9  0x00000011 in ?? ()
#10 0x00000000 in ?? ()