Comment 26 for bug 286175

As of Natty (and not earlier versions), FcConfigSubstituteWithPat() reproducibly crashes in some Windows applications running under Wine. Example backtrace:

Unhandled exception: denormal float operand in 32-bit code (0x7e9d9310).
Register dump:
 CS:0023 SS:002b DS:002b ES:002b FS:0063 GS:006b
 EIP:7e9d9310 ESP:00d6de60 EBP:00d6dec8 EFLAGS:00010202( R- -- I - - - )
 EAX:00000003 EBX:7e9ffff4 ECX:00000012 EDX:00000003
 ESI:00000003 EDI:00000003
Stack dump:
0x00d6de60: 00d6de98 00d6df24 7e9ffff4 7e9ffff4
0x00d6de70: 7d730140 7d77a650 00d6dec8 00000012
0x00d6de80: 00000000 00000014 f75fe3c0 00000003
0x00d6de90: 7d72d9f0 00000003 00000003 7d7304f0
0x00d6dea0: 00000003 00000003 7d72d9f0 00000003
0x00d6deb0: 00000001 7d77a528 7e9d929b 7e9ffff4
Backtrace:
=>0 0x7e9d9310 in libfontconfig.so.1 (+0x7310) (0x00d6dec8)
  1 0x7e9da382 FcConfigSubstituteWithPat+0x191() in libfontconfig.so.1 (0x00d6df48)
  2 0x7e9da8e7 FcConfigSubstitute+0x26() in libfontconfig.so.1 (0x00d6df68)
  3 0x7e96ef72 X11DRV_XRender_SelectFont+0xc41(physDev=0x1535d8, hfont=0xe98) [/home/user/wine/dlls/winex11.drv/xrender.c:935] in winex11 (0x00d6e108)
  4 0x7e965e05 X11DRV_SelectFont+0xee4(physDev=0x1535d8, hfont=0xe98, gdiFont=0x189c88) [/home/user/wine/dlls/winex11.drv/xfont.c:3241] in winex11 (0x00d6e558)
  5 0x7ec0c19f FONT_SelectObject+0x9e(handle=0xe98, hdc=0x660) [/home/user/wine/dlls/gdi32/font.c:546] in gdi32 (0x00d6e5c8)
  6 0x7ec22eeb SelectObject+0xba(hdc=0x660, hObj=0xe98) [/home/user/wine/dlls/gdi32/gdiobj.c:1112] in gdi32 (0x00d6e618)
  7 0x7e6d45fa SelectObject16+0x19(hdc=0x660, handle=0xe98) [/home/user/wine/dlls/gdi.exe16/gdi.c:1101] in gdi.exe16 (0x00d6e638)
  8 0x7e6d05da __i686.get_pc_thunk.bx+0xc82() in gdi.exe16 (0x00d6e648)
  9 0x7eadac9e __wine_call_from_16+0x75() in krnl386.exe16 (0x00d6e678)
  10 0x1227:0x213e (0x124f:0x4b6e)
  11 0x1227:0x20a9 (0x124f:0x4c7a)
  12 0x1227:0x1dde (0x124f:0x4c8c)
  13 0x1237:0x2af8 (0x124f:0x4c9c)
  14 0x1237:0x29a2 (0x124f:0x4cb0)
  15 0x123f:0x3aa9 (0x124f:0x4dd4)
  16 0x123f:0x2305 (0x124f:0x4df2)
  17 0x123f:0x0b32 (0x124f:0x4f64)
  18 0x1237:0x2533 (0x124f:0x507a)
  19 0x1237:0x6e26 (0x124f:0x5096)
  20 0x11df:0x0072 (0x124f:0x50a8)
  21 0x11df:0x0000 (0x124f:0x0000)
0x7e9d9310: fstpl 0xffffffe0(%ebp)

Yes, it happens for more than one application, and no, none of them are freely available.