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POExpected behaviour? MATLAB ignores errors on deserialization, except when in debug mode
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  1. POExpected behaviour? MATLAB ignores errors on deserialization, except when in debug mode
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    copied!<p>I don't understand Matlab's behaviour in the example below. On deserialization, it sets the properties of the object. This causes <code>set.name</code> to be executed. For the purpose of the example, I have constructed a case where an error is thrown in this method. In the first deserialization, the error is ignored and unhandled; the function simply stops execution at the error, code after the error is not executed. On the second deserialization, I have set <code>dbstop if error</code>, and now the error <em>is</em> triggered as I would expect. Questions follow below the example.</p> <pre><code>&gt;&gt; clear all; &gt;&gt; dbstatus; &gt;&gt; type Tester.m; classdef Tester &lt; handle properties name; end methods function self = Tester() disp('Creating Tester object'); end function set.name(self, val) global allnames if isequal(allnames, []) allnames = {}; end if any(strcmp(allnames, val)) fprintf(1, 'Name already exists. Will issue error.\n'); error('Error: duplicate name %s', val); fprintf(1, 'Still here?\n'); else self.name = val; allnames = [allnames self.name]; end end end end &gt;&gt; t = Tester(); Creating Tester object &gt;&gt; t.name = 'abc'; &gt;&gt; save('/tmp/fubar.mat', 't'); &gt;&gt; load('/tmp/fubar.mat') Name already exists. Will issue error. &gt;&gt; dbstop if error &gt;&gt; load('/tmp/fubar.mat') Name already exists. Will issue error. Error using Tester/set.name (line 18) Error: duplicate name abc 18 error('Error: duplicate name %s', val); K&gt;&gt; dbquit </code></pre> <ul> <li>Should I be surprised at this behaviour?</li> <li>Is this MATLAB™ being strange, or would other programming languages engage similar behaviour?</li> <li>Is there a good reason to behave like this?</li> </ul>
 

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