[Octave-bug-tracker] [bug #62011] addRequired of inputParser raising "protected access" error

[Maxim Gawrilow]

Follow-up Comment #3, bug #62011 (project octave):

GNU/Linux is correct. (sorry, forgot to login before posting)

I was able to narrow down the strange behaviour to a very obscure edge case.
When the function is called in a cleared ("clear all") environment, it works
without a problem.
However, by accident I had typed "@inputParser" in the command window (I know,
not a useful command), and after that calling the function created the strange
error.
In order to reproduce it should be sufficient to reduce the function to the
bare minimum:

function parsertest(varargin)
p = inputParser();
p.addRequired("pack", @ischar);
p.parse(varargin{:});
endfunction


Then
'clear all; parsertest("mech")'
works without problems, but
'@inputParser; parsertest("mech")'
not. Any subsequent useless command like '@bla' does not prevent the error
from happening, only a 'clear all' does.

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