<p>I think the tests still failing is a reasonably outstanding issue:</p>
<p><a href="http://big.cc.gt.atl.ga.us/job/mlpack%20-%20nightly%20matrix%20build/arch=linux-amd64,armadillo=armadillo-4.500.0,buildmode=release/730/console">http://big.cc.gt.atl.ga.us/job/mlpack%20-%20nightly%20matrix%20build/arch=linux-amd64,armadillo=armadillo-4.500.0,buildmode=release/730/console</a></p>
<p>This is the same issue as for the test you commented out. I'm happy to dig in and try to make initialZ symmetric positive definite, but I am far from the expert in this case...</p>
<p>If you instead want to close this issue and open another one for that, sure, go ahead; I just want to make sure that the failing tests get addressed at some point.</p>
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