ith the non-optimal form to fill the
    available space.<br>
<b>Raises</b> <code>Class_structure_error</code> if the length of an opcode produced is greater
    than the available space (number of OpInvalid + 1) except if
    <a href="JBasics.html#VALset_permissive"><code class="code"><span class="constructor">JBasics</span>.set_permissive</code></a> has been called with <code class="code"><span class="keyword">true</span></code>.  Note that this
    will only be an issue when dumping the code to a class f