From bug-request at octave dot org Fri Mar 10 14:35:10 2006
Subject: Re: Function handle not correctly updated
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: David dot Bateman at motorola dot com
Cc: bug at octave dot org
Date: Fri, 10 Mar 2006 15:34:59 -0500

On 28-Jan-2006, David Bateman wrote:

| Bug confirmed with the latest CVS. In fact its even worse than just 
| function handles. Even fnctions defined on the command-line suffer from 
| this. That is
| 
| octave:1> function y = foo(x),  y = 3 + x; endfunction
| octave:2> foo(4)
| ans = 7
| octave:3> function y = foo(x),  y = 3 - x; endfunction
| octave:4> foo(4)
| ans = 7

This part has been fixed for a while now.  I think it was this change:

2006-02-08  John W. Eaton  <jwe at octave dot org>

	* parse.y (frob_function): Clear ID_NAME from top_level symbol
	table if we are defining a function at the top-level and a
	function with the same name is already in the top-level symbol
	table.

The problem with function handles is not yet fixed, though I have an
idea about what is causing the problem.  My guess is that the function
handle grabs a pointer to a octave function object and never checks to
see if it changes.

jwe



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