<p>Hi there <a href="https://github.com/ferbncode" class="user-mention">@ferbncode</a>, thanks for the PR!  I took a quick look at the build output, and it seems to me like you haven't included <code>boost/variant.hpp</code> in <code>rs_model.hpp</code>.  Before you submit a PR, be sure to build your modified version of mlpack locally to make sure that Travis will be able to build it too.  Plus, it's generally easier to debug locally. :)</p>

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