WineDbg starting on pid 0023
0x7b461380 ExitProcess+0xff0 in kernel32: subl	$8,%esp
Wine-dbg>Unhandled exception: page fault on write access to 0x7cbd5000 in 32-bit code (0x7e1cfa6b).
Register dump:
 CS:0023 SS:002b DS:002b ES:002b FS:0063 GS:006b
 EIP:7e1cfa6b ESP:0090fb7c EBP:7bfa8288 EFLAGS:00210246(  R- --  I  Z- -P- )
 EAX:00000001 EBX:7d8dd000 ECX:00000000 EDX:7cbd5000
 ESI:00000000 EDI:00000000
Stack dump:
0x0090fb7c:  7d8ba60f 7cbd5000 7d8dd000 7bfa8338
0x0090fb8c:  7d8ba5b5 7cb29dd8 7bf85e28 00000000
0x0090fb9c:  00000000 00000000 00000000 00000000
0x0090fbac:  00000000 00000001 7bf96570 00000000
0x0090fbbc:  7ea5f97c 7eaad600 06e0002a 7ea5f82b
0x0090fbcc:  25a75c00 0002004c 7dcce88c 7d8ba4c9
000c: sel=0067 base=00000000 limit=00000000 32-bit r-x
Backtrace:
=>0 0x7e1cfa6b xshmfence_reset+0xb() in libxshmfence.so.1 (0x7bfa8288)
  1 0x7d8ba60f in libgl.so.1 (+0x4a60e) (0x7bfa8288)
  2 0x7d8b47a4 in libgl.so.1 (+0x447a3) (0x7cb3a140)
  3 0x7d885a14 glXSwapBuffers+0x63() in libgl.so.1 (0x7cb3a140)
  4 0x7dd6f723 in winex11 (+0x2f722) (0x0090fcc8)
  5 0x7a8a83ec wglSwapBuffers+0x4b() in opengl32 (0x0090fd08)
  6 0x7ea69410 SwapBuffers+0x2f() in gdi32 (0x0090fd48)
  7 0x00493188 in n (+0x93187) (0x0090fd5c)
  8 0x004ba387 in n (+0xba386) (0x0090fd68)
  9 0x004bb584 in n (+0xbb583) (0x0090fd7c)
  10 0x004b108a in n (+0xb1089) (0x0090fd9c)
  11 0x004cc9b7 in n (+0xcc9b6) (0x0090fdc4)
  12 0x004cdde1 in n (+0xcdde0) (0x0090fde4)
  13 0x004c58d3 in n (+0xc58d2) (0x0090fdf0)
  14 0x004dad25 in n (+0xdad24) (0x0090fdf8)
  15 0x00401430 in n (+0x142f) (0x0090fe20)
  16 0x0040123d in n (+0x123c) (0x0090fe40)
  17 0x00401268 in n (+0x1267) (0x0090fe50)
  18 0x7b46038c call_process_entry+0xb() in kernel32 (0x0090fe68)
  19 0x7b46138a ExitProcess+0xff9() in kernel32 (0x0090fe98)
  20 0x7bc8140c call_thread_func_wrapper+0xb() in ntdll (0x0090feb8)
  21 0x7bc843df call_thread_func+0xce() in ntdll (0x0090ffa8)
  22 0x7bc813ea RtlRaiseException+0x21() in ntdll (0x0090ffc8)
  23 0x7bc538c7 call_dll_entry_point+0x3d6() in ntdll (0x0090ffe8)
  24 0xf7573dad wine_call_on_stack+0x1c() in libwine.so.1 (0x00000000)
  25 0xf7573f10 wine_switch_to_stack+0x1f() in libwine.so.1 (0xff9c4f08)
  26 0x7bc59781 LdrInitializeThunk+0x220() in ntdll (0xff9c4f48)
  27 0x7b467550 __wine_kernel_init+0xa5f() in kernel32 (0xff9c60b8)
  28 0x7bc5a663 __wine_process_init+0x152() in ntdll (0xff9c6128)
  29 0xf7571fe7 wine_init+0x2c6() in libwine.so.1 (0xff9c6188)
  30 0x7c000a82 main+0x81() in <wine-loader> (0xff9c65d8)
  31 0xf73ad196 __libc_start_main+0xf5() in libc.so.6 (0x00000000)
0x7e1cfa6b xshmfence_reset+0xb in libxshmfence.so.1: lock cmpxchgl	0x0(%edx),%ecx
Wine-dbg>Ctrl-C: stopping debuggee