plot() command broken in Octave version 3.0.0 for Red Hat Enterprise?

[John W. Eaton]

On 12-Feb-2008, Rick Niles wrote:

| OK, I've been out of octave development for a while, but something seems 
| really wrong here:
| 
| octave:2> plot([1 2 3])
| error: can't perform indexing operations for <unknown type> type
| error: called from `plot' in file `/usr/share/octave/3.0.0/m/plot/plot.m'
| octave:2> version
| ans = 3.0.0
| octave:3>
| 
| No matter what type of item I pass to plot() I get the same error.  
| Could something be corrupted with the RPM?

I can't reproduce this problem with 3.0.0 on a Debian system.

The plot function is fairly short:

  function retval = plot (varargin)

    [h, varargin] = __plt_get_axis_arg__ ("plot", varargin{:});

    oldh = gca ();
    unwind_protect
      axes (h);
      newplot ();
      tmp = __plt__ ("plot", h, varargin{:});
    unwind_protect_cleanup
      axes (oldh);
    end_unwind_protect

    if (nargout > 0)
      retval = tmp;
    endif

  endfunction

Can you track down where the error happens?  Do you have any functions
in your path called gca, axes, newplot, or __plt__ that are not from
Octave 3.0.0?

jwe