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(gdb) run
Starting program: /usr/local/bin/xconq 

Program received signal SIGSEGV, Segmentation fault.
0x4018814c in Tcl_SetResult () from /usr/lib/libtcl8.4.so
(gdb) bt
#0  0x4018814c in Tcl_SetResult () from /usr/lib/libtcl8.4.so
#1  0x0804cb63 in tk_u_image_name(void*, Tcl_Interp*, int, char**) (
    cldata=0x0, interp=0x820c660, argc=2, argv=0x0) at tkmain.c:849
#2  0x40132cbb in TclInvokeStringCommand () from /usr/lib/libtcl8.4.so
#3  0x40133dba in TclEvalObjvInternal () from /usr/lib/libtcl8.4.so
#4  0x4015824e in TclExecuteByteCode () from /usr/lib/libtcl8.4.so
#5  0x40157920 in TclCompEvalObj () from /usr/lib/libtcl8.4.so
#6  0x401868e4 in TclObjInterpProc () from /usr/lib/libtcl8.4.so
#7  0x40133dba in TclEvalObjvInternal () from /usr/lib/libtcl8.4.so
#8  0x4015824e in TclExecuteByteCode () from /usr/lib/libtcl8.4.so
#9  0x40157920 in TclCompEvalObj () from /usr/lib/libtcl8.4.so
#10 0x401868e4 in TclObjInterpProc () from /usr/lib/libtcl8.4.so
#11 0x40133dba in TclEvalObjvInternal () from /usr/lib/libtcl8.4.so
#12 0x40134747 in Tcl_EvalEx () from /usr/lib/libtcl8.4.so
#13 0x40134b13 in Tcl_Eval () from /usr/lib/libtcl8.4.so
#14 0x4013609f in Tcl_GlobalEval () from /usr/lib/libtcl8.4.so
#15 0x08055341 in eval_tcl_cmd(char*, ...) (
    fmt=0x2 <Address 0x2 out of bounds>) at tkmain.c:3902
#16 0x0805580a in create_map() () at tkmain.c:4054
#17 0x08056e1f in init_display() () at tkinit.c:278
#18 0x0805571a in init_all_displays () at tkmain.c:4011
#19 0x080569c8 in launch_game() () at tkmain.c:4649
#20 0x0804dfab in tk_launch_game(void*, Tcl_Interp*, int, char**) (cldata=0x0, 
    interp=0x820c660, argc=1, argv=0xbfffdfe0) at tkmain.c:1406
#21 0x40132cbb in TclInvokeStringCommand () from /usr/lib/libtcl8.4.so
#22 0x40133dba in TclEvalObjvInternal () from /usr/lib/libtcl8.4.so
#23 0x4015824e in TclExecuteByteCode () from /usr/lib/libtcl8.4.so
#24 0x40157920 in TclCompEvalObj () from /usr/lib/libtcl8.4.so
#25 0x401868e4 in TclObjInterpProc () from /usr/lib/libtcl8.4.so
#26 0x40133dba in TclEvalObjvInternal () from /usr/lib/libtcl8.4.so
#27 0x4015824e in TclExecuteByteCode () from /usr/lib/libtcl8.4.so
#28 0x40157920 in TclCompEvalObj () from /usr/lib/libtcl8.4.so
#29 0x40134ca1 in Tcl_EvalObjEx () from /usr/lib/libtcl8.4.so
#30 0x4021139e in TkInvokeButton () from /usr/lib/libtk8.4.so
#31 0x40210644 in ButtonWidgetObjCmd () from /usr/lib/libtk8.4.so
#32 0x40133dba in TclEvalObjvInternal () from /usr/lib/libtcl8.4.so
#33 0x40133fbe in Tcl_EvalObjv () from /usr/lib/libtcl8.4.so
#34 0x40134c44 in Tcl_EvalObjEx () from /usr/lib/libtcl8.4.so
#35 0x40186245 in Tcl_UplevelObjCmd () from /usr/lib/libtcl8.4.so
#36 0x40133dba in TclEvalObjvInternal () from /usr/lib/libtcl8.4.so
#37 0x4015824e in TclExecuteByteCode () from /usr/lib/libtcl8.4.so
#38 0x40157920 in TclCompEvalObj () from /usr/lib/libtcl8.4.so
#39 0x401868e4 in TclObjInterpProc () from /usr/lib/libtcl8.4.so
#40 0x40133dba in TclEvalObjvInternal () from /usr/lib/libtcl8.4.so
#41 0x40134747 in Tcl_EvalEx () from /usr/lib/libtcl8.4.so
#42 0x40134b13 in Tcl_Eval () from /usr/lib/libtcl8.4.so
#43 0x4013609f in Tcl_GlobalEval () from /usr/lib/libtcl8.4.so
#44 0x401cf04a in Tk_BindEvent () from /usr/lib/libtk8.4.so
#45 0x401d4c87 in TkBindEventProc () from /usr/lib/libtk8.4.so
#46 0x401dc293 in Tk_HandleEvent () from /usr/lib/libtk8.4.so
#47 0x401dc6ed in WindowEventProc () from /usr/lib/libtk8.4.so
#48 0x4017ccaa in Tcl_ServiceEvent () from /usr/lib/libtcl8.4.so
#49 0x4017cf1a in Tcl_DoOneEvent () from /usr/lib/libtcl8.4.so
#50 0x08050005 in ui_mainloop() () at tkmain.c:2032
#51 0x0804af75 in main (argc=1, argv=0xbffff874) at tkunix.c:118
#52 0x4037ebb4 in __libc_start_main () from /lib/libc.so.6
(gdb) quit
The program is running.  Exit anyway? (y or n)