bug: grep 2.5e - error message is bad for incorrect "-C" arg

[Greg Fast]

Found this:

    % grep -Cx
    grep: x: invalid context length argument: !ùÿ¿&ùÿ¿
    
    % grep --version
    grep (GNU grep) 2.5e
    ...

The offending line looks like src/grep.c +191: 

   183  static void
   184  context_length_arg (char const *str, int *out)
   185  {
   186    uintmax_t value;
   187    if (! (xstrtoumax (str, 0, 10, &value, "") == LONGINT_OK
   188           && 0 <= (*out = value)
   189           && *out == value))
   190      {
   191        error (2, 0, "%s: %s: %s\n", str, _("invalid context length 
argument"));

So it's just dumping an uninitilized location, not dependant on the
command line, and probably not exploitable?  But I'm not sure I fully
grasp the macros involved, since I just looked at this quickly.


--
Greg Fast