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[Octave-bug-tracker] [bug #55348] [octave forge] (ga) Unit test in ga.m
From: |
Rafael Laboissiere |
Subject: |
[Octave-bug-tracker] [bug #55348] [octave forge] (ga) Unit test in ga.m fails randomly |
Date: |
Mon, 31 Dec 2018 12:06:46 -0500 (EST) |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.7 Safari/537.36 |
URL:
<https://savannah.gnu.org/bugs/?55348>
Summary: [octave forge] (ga) Unit test in ga.m fails randomly
Project: GNU Octave
Submitted by: rlaboiss
Submitted on: Mon 31 Dec 2018 05:06:44 PM UTC
Category: Octave Forge Package
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Unexpected Error
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:
The following unit test in ga.m (line 197), fails randomly:
%!test
%! ps = getfield (default_options, "PopulationSize");
%! options = gaoptimset ("EliteCount", randi ([0, ps]));
%! x = ga (f, nvars, [], [], [], [], [], [], @nonlcon, options);
To bug can be reproduced by running the following script:
pkg load ga
f = @rastriginsfcn;
nvars = 2;
default_options = gaoptimset ();
function [C, Ceq] = nonlcon (x)
C = [];
Ceq = [];
endfunction
while 1
ps = getfield (default_options, "PopulationSize");
options = gaoptimset ("EliteCount", randi ([0, ps]));
printf ("EliteCount = %d\n", options.EliteCount);
x = ga (f, nvars, [], [], [], [], [], [], @nonlcon, options);
endwhile
It produces an output like this:
EliteCount = 8
EliteCount = 14
EliteCount = 15
[snip]
EliteCount = 3
EliteCount = 20
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
Apparently, EliteCount must be strictly smaller than PopulationSize, but the
root of the bug may be elsewhere (I did not investigate deeply the problem).
At any rate, the patch attached to this bug report seems to fix the problem.
_______________________________________________________
File Attachments:
-------------------------------------------------------
Date: Mon 31 Dec 2018 05:06:44 PM UTC Name:
max-EliteCount-in-ga-unit-test.patch Size: 725B By: rlaboiss
<http://savannah.gnu.org/bugs/download.php?file_id=45815>
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