Crash at startup of DDD for Fortran programs

Hello. DDD displays an error at startup when I use it on any Fortran program. 
Here is a test on a two-line program :

$ cat plouf.f
      print *, "plouf"
      end

$ gfortran -g -O0 plouf.f

$ ddd a.out

The DDD console opens with the following message :

"GNU DDD 3.3.11 (i586-mandriva-linux-gnu), by Dorothea Lütkehaus and Andreas 
Zeller.
Copyright © 1995-1999 Technische Universität Braunschweig, Germany.
Copyright © 1999-2001 Universität Passau, Germany.
Copyright © 2001 Universität des Saarlandes, Germany.
Copyright © 2001-2004 Free Software Foundation, Inc.
Using host libthread_db library "/lib/i686/libthread_db.so.1".
(gdb) 
Segmentation fault"

and two dialog boxes appear saying :

"GDB terminated abnormally (Segmentation fault)"

"/libgfortran/fmain.c: No such file or directory"

Does anyone have a suggestion?
Sincerely,
Lionel GUEZ