$ gdb /usr/games/bin/nq-sdl32 core
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This GDB was configured as "i686-pc-linux-gnu"...
(no debugging symbols found)...Using host libthread_db library "/lib/libthread_db.so.1".
 
Core was generated by `nq-sdl32'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /usr/games/lib/libQFcsqc.so.1...
(no debugging symbols found)...done.
Loaded symbols for /usr/games/lib/libQFcsqc.so.1
Reading symbols from /usr/games/lib/libQFrenderer_sw32.so.1...
(no debugging symbols found)...done.
Loaded symbols for /usr/games/lib/libQFrenderer_sw32.so.1
Reading symbols from /usr/games/lib/libQFmodels_sw.so.1...
(no debugging symbols found)...done.
Loaded symbols for /usr/games/lib/libQFmodels_sw.so.1
Reading symbols from /usr/games/lib/libQFjs.so.1...
(no debugging symbols found)...done.
Loaded symbols for /usr/games/lib/libQFjs.so.1
Reading symbols from /usr/games/lib/libQFcd.so.1...
(no debugging symbols found)...done.
Loaded symbols for /usr/games/lib/libQFcd.so.1
Reading symbols from /usr/games/lib/libQFsound.so.1...
(no debugging symbols found)...done.
Loaded symbols for /usr/games/lib/libQFsound.so.1
Reading symbols from /usr/games/lib/libQFconsole.so.1...
(no debugging symbols found)...done.
Loaded symbols for /usr/games/lib/libQFconsole.so.1
Reading symbols from /usr/games/lib/libQFgamecode_builtins.so.1...
(no debugging symbols found)...done.
Loaded symbols for /usr/games/lib/libQFgamecode_builtins.so.1
Reading symbols from /usr/games/lib/libQFgamecode.so.1...
(no debugging symbols found)...done.
Loaded symbols for /usr/games/lib/libQFgamecode.so.1
Reading symbols from /usr/games/lib/libQFutil.so.1...
(no debugging symbols found)...done.
Loaded symbols for /usr/games/lib/libQFutil.so.1
Reading symbols from /usr/lib/libz.so.1...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libz.so.1
Reading symbols from /usr/games/lib/libQFgib.so.1...
(no debugging symbols found)...done.
Loaded symbols for /usr/games/lib/libQFgib.so.1
Reading symbols from /usr/lib/libSDL-1.2.so.0...(no debugging symbols found)...
done.
Loaded symbols for /usr/lib/libSDL-1.2.so.0
Reading symbols from /lib/libdl.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/libdl.so.2
Reading symbols from /usr/lib/libasound.so.2...(no debugging symbols found)...
done.
Loaded symbols for /usr/lib/libasound.so.2
Reading symbols from /usr/X11R6/lib/libX11.so.6...
(no debugging symbols found)...done.
Loaded symbols for /usr/X11R6/lib/libX11.so.6
Reading symbols from /usr/X11R6/lib/libXext.so.6...
(no debugging symbols found)...done.
Loaded symbols for /usr/X11R6/lib/libXext.so.6
Reading symbols from /lib/libpthread.so.0...(no debugging symbols found)...
done.
Loaded symbols for /lib/libpthread.so.0
Reading symbols from /lib/libm.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib/libm.so.6
Reading symbols from /lib/libc.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib/libc.so.6
Reading symbols from /lib/ld-linux.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/ld-linux.so.2
Reading symbols from /lib/libnss_compat.so.2...(no debugging symbols found)...
done.
Loaded symbols for /lib/libnss_compat.so.2
Reading symbols from /lib/libnsl.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/libnsl.so.1
Reading symbols from /lib/libnss_nis.so.2...(no debugging symbols found)...
done.
Loaded symbols for /lib/libnss_nis.so.2
Reading symbols from /lib/libnss_files.so.2...(no debugging symbols found)...
done.
Loaded symbols for /lib/libnss_files.so.2
Reading symbols from /usr/X11R6/lib/libXcursor.so.1...
(no debugging symbols found)...done.
Loaded symbols for /usr/X11R6/lib/libXcursor.so.1
Reading symbols from /usr/X11R6/lib/libXrender.so.1...
(no debugging symbols found)...done.
Loaded symbols for /usr/X11R6/lib/libXrender.so.1
Reading symbols from /usr/X11R6/lib/X11/locale/lib/common/xlcDef.so.2...
(no debugging symbols found)...done.
Loaded symbols for /usr/X11R6/lib/X11/locale/lib/common/xlcDef.so.2
#0  0x4002e292 in Turbulent () from /usr/games/lib/libQFrenderer_sw32.so.1
(gdb) where
#0  0x4002e292 in Turbulent () from /usr/games/lib/libQFrenderer_sw32.so.1
#1  0x4002ab2a in D_DrawSurfaces () from /usr/games/lib/libQFrenderer_sw32.so.1
#2  0x4003987c in R_ScanEdges () from /usr/games/lib/libQFrenderer_sw32.so.1
#3  0x4003acf3 in R_MarkLeaves () from /usr/games/lib/libQFrenderer_sw32.so.1
#4  0x4003ae4e in R_MarkLeaves () from /usr/games/lib/libQFrenderer_sw32.so.1
#5  0x4003b0c2 in R_RenderView () from /usr/games/lib/libQFrenderer_sw32.so.1
#6  0x40034874 in SCR_UpdateScreen ()
   from /usr/games/lib/libQFrenderer_sw32.so.1
#7  0x08066d01 in CL_UpdateScreen ()
#8  0x0805500f in Host_ServerFrame ()
#9  0x08054076 in main ()
(gdb)