Hello,

I think that this is a sufficiently serious issue to diserve a report in bugzilla.scilab.org. But could you prepare a more compact example ?

S.

Le 16/10/2020 à 13:35, Arvid Rosén a écrit :

Hi!

We have found a tricky issue when moving over from Scilab 5 to Scilab 6 in my organization. We have a lot of code which works with nested lists, and functions modifying those lists. However, when a function is called with some nested lists as an input argument, the body of that function can change the value of the variable in the calling scope. This was not the case in Scilab 5, and the issue is super tricky to hunt down in our quite extensive code base. Below is a short example of the problem, and how to reproduce it.

I have also filed a bug report here: https://bugzilla.scilab.org/show_bug.cgi?id=16556

Is anyone else seeing this problem? And do you have any workarounds or other suggestions?

Cheers,

Arvid

------

// Define variables

testArray = list();

for i=1:1:10

    testArray($+1) = list();

    for j=1:1:10

        testArray(i)($+1) = [];

        testArray(i)(j).testMember = 1;

    end

end

testArrayOrig = testArray;

// Define functions

function outArray = testFunc(inArray)

    for i=1:1:10

        for j=1:1:10

            inArray(i)(j).testMember = 5

        end

    end

    outArray = inArray;

endfunction

// Send the variable as argument to the function

if %t

    testArrayOut = testFunc2(testArray);

    if testArrayOut(1)(1).testMember == testArray(1)(1).testMember

        error("Error! inputArgument was changed by function");

    end

end


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--
Stéphane Mottelet
Ingénieur de recherche
EA 4297 Transformations Intégrées de la Matière Renouvelable
Département Génie des Procédés Industriels
Sorbonne Universités - Université de Technologie de Compiègne
CS 60319, 60203 Compiègne cedex
Tel : +33(0)344234688
http://www.utc.fr/~mottelet

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