[Octave-bug-tracker] [bug #53844] handle class: delete destructor method cannot access class properties

[Mike Miller]

Follow-up Comment #5, bug #53844 (project octave):

Ok, here is the strange case that I am now running into. Consider the
following toy class


classdef dummy < handle

  properties
    id
  endproperties

  methods

    function self = dummy (id)
      if (nargin < 1)
        id = 'dummy';
      endif
      self.id = id;
    endfunction

    function delete (self)
      fprintf (stderr, '');
    endfunction

    function r = isa (self, klass)
      r = isequal (self.id, klass);
    endfunction

  endmethods

endclassdef


Now the following code at the interpreter prompt shows the problem


>> x = dummy;
>> isa (x, 'dummy')
ans = 1
>> isa (dummy, 'dummy')
>> 


Notice how the second call to 'isa' returns nothing at all.

If the delete method is removed, or if the method stays but the entire
function body is deleted or commented out, then this behaves as it should. But
if the destructor does *something*, then the method on the transient value
returns nothing.

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