bash Segmentation fault using Here Strings

[Stroesser, Bodo]

Configuration Information [Automatically generated, do not change]:
Machine: i686
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='i686' 
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i686-pc-linux-gnu' 
-DCONF_VENDOR='pc' -DSHELL -DHAVE_CONFIG_H  -I.  -I. -I./include -I./lib  -g -O2
uname output: Linux s390develop 2.4.19-64GB-SMP #5 SMP Mit Jul 23 14:27:20 CEST 
2003 i686 unknown
Machine Type: i686-pc-linux-gnu

Bash Version: 2.05b
Patch Level: 0
Release Status: release

Description:
        [ If the execution of a command, that produces no output is
        the input to a Here String, bash seg-faults]

Repeat-By:
        [Example: "cat <<< $(echo -n)" causes a Segmentation fault]

Fix:
        [In the described case, the result of
        expand_string_to_string(), called from write_here_string() in
        file redir.c, is NULL. This case is not checked and
        strlen() for the result is called --> Segfault. The following
        patch works:

        --- redir.c.old Wed Sep 24 16:57:33 2003
        +++ redir.c     Wed Sep 24 17:00:20 2003
        @@ -263,16 +263,18 @@
           int herelen, n, e;

           herestr = expand_string_to_string (redirectee->word, 0);
        -  herelen = strlen (herestr);
        -
        -  n = write (fd, herestr, herelen);
        -  if (n == herelen)
        +  if ( herestr )
        +    {
        +      herelen = strlen (herestr);
        +      n = write (fd, herestr, herelen);
        +      free (herestr);
        +    }
        +  if (n == herelen || ! herestr)
             {
               n = write (fd, "\n", 1);
               herelen = 1;
             }
           e = errno;
        -  free (herestr);
           if (n != herelen)
             {
               if (e == 0)
        
        ]

Best regards
Bodo Stroesser