[Octave-bug-tracker] [bug #54316] [octave forge] (ga) Unit test in ga.m fails randomly

[Rafael Laboissiere]

URL:
  <http://savannah.gnu.org/bugs/?54316>

                 Summary: [octave forge] (ga) Unit test in ga.m fails randomly
                 Project: GNU Octave
            Submitted by: rlaboiss
            Submitted on: Mon 16 Jul 2018 12:13:46 PM UTC
                Category: Octave Forge Package
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: other
        Operating System: Any

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Details:

One of the unit tests in file ga.m fails randomly.  This is a way of
triggering the bug:


$ octave-cli -q
octave:1> pkg load ga
octave:2> f = @rastriginsfcn;
octave:3> nvars =  2;
octave:4> default_options = gaoptimset ();
octave:5> ps = getfield (default_options, "PopulationSize");
octave:6> function [C, Ceq] = nonlcon (x)
    C = [];
    Ceq = [];
endfunction
octave:7> while 1
    options = gaoptimset ("EliteCount", randi ([0, ps]));
    x = ga (f, nvars, [], [], [], [], [], [], @nonlcon, options);
endwhile
error: value on right hand side of assignment is undefined
error: called from
    __ga_selectionfcn__ at line 20 column 26
    __ga_problem__ at line 55 column 42
    ga at line 113 column 47


There are other unit tests that also use the randi() function.  they may be
affected, but I did not do extensive investigation on the issue.




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