/****warning at console**/
[root@www testprog]# ddd a.out

Internal error (Segmentation fault).

Oops!  You have found a bug in DDD.

If you can reproduce this bug, please send a bug report
to <bug-ddd@gnu.org>, giving a subject like

    DDD 3.3.1 (i386-redhat-linux-gnu) gets `Segmentation fault' signal

To enable us to fix the bug, you should include the following information:
* What you were doing to get this message.  Report all the facts.
* The contents of the `~/.ddd/log' file as generated by this session.
Please read also the section "Reporting Bugs" in the DDD manual.

We thank you for your support.

Segmentation fault (core dumped)

/**core dump with bt ****/
gdb ddd core.11612
(gdb) bt
#0  0x08112adc in set_buffer_gdb_output() ()
#1  0xbfffe618 in ?? ()
#2  0x08113473 in kill_exec_tty(bool) ()
#3  0x08113d08 in ddd_cleanup() ()
#4  0x081155b8 in ddd_x_fatal ()
#5  0x4039c2cf in _XIOError () from /usr/X11R6/lib/libX11.so.6
#6  0x403999ec in _XRead () from /usr/X11R6/lib/libX11.so.6
#7  0x4038b819 in XOpenDisplay () from /usr/X11R6/lib/libX11.so.6
#8  0x40304db8 in XtOpenDisplay () from /usr/X11R6/lib/libXt.so.6
#9  0x40304ffd in _XtAppInit () from /usr/X11R6/lib/libXt.so.6
#10 0x4030f3c7 in XtOpenApplication () from /usr/X11R6/lib/libXt.so.6
#11 0x080520e4 in main ()
#12 0x42015574 in __libc_start_main () from /lib/tls/libc.so.6

/**core dump with bt full**/
gdb) bt full
#0  0x08112adc in set_buffer_gdb_output() ()
No symbol table info available.
#1  0xbfffe618 in ?? ()
No symbol table info available.
#2  0x08113473 in kill_exec_tty(bool) ()
No symbol table info available.
#3  0x08113d08 in ddd_cleanup() ()
No symbol table info available.
#4  0x081155b8 in ddd_x_fatal ()
No symbol table info available.
#5  0x4039c2cf in _XIOError () from /usr/X11R6/lib/libX11.so.6
No symbol table info available.
#6  0x403999ec in _XRead () from /usr/X11R6/lib/libX11.so.6
No symbol table info available.
#7  0x4038b819 in XOpenDisplay () from /usr/X11R6/lib/libX11.so.6
No symbol table info available.
#8  0x40304db8 in XtOpenDisplay () from /usr/X11R6/lib/libXt.so.6
No symbol table info available.
#9  0x40304ffd in _XtAppInit () from /usr/X11R6/lib/libXt.so.6
No symbol table info available.
#10 0x4030f3c7 in XtOpenApplication () from /usr/X11R6/lib/libXt.so.6
No symbol table info available.
#11 0x080520e4 in main ()
No symbol table info available.
#12 0x42015574 in __libc_start_main () from /lib/tls/libc.so.6
No symbol table info available.