d element <code>third</code> equal to an unnamed length 1 numerical vector. On macOS though, it returns a list named <code>first</code>, that contains a named element <code>second</code> equal to a named (<code>third</code>) length 1 numerical vector. So <code>second</code> is a list on the other platforms, while being a named numerical vector on macOS. This caused a bug on macOS while computing standard errors.</li>
</ul></div>
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