Issue description

Frequently, in Windows Azure Pipelines, Test 88: RecurrentNetworkTest fails on PRs which have nothing to do with that test. This is confusing to PR authors, so having it as a logged issue may help out with review.

Your environment

• version of mlpack: master/Pull Request Refs
• operating system: Visual Studio 14 2015 Win64
• compiler: msbuild
• version of dependencies (Boost/Armadillo):
• any other environment information you think is relevant:

Steps to reproduce

This seems to happen almost randomly.
See, for example this Azure CI Log.

Expected behavior

"Passed"

Actual behavior

Often, but not consistently, fails with message

unknown location(0): fatal error: in "RecurrentNetworkTest/LSTMDistractedSequenceRecallTest": memory access violation occurred at address 0xd1adf000, while attempting to  read inaccessible data
D:\a\1\s\src\mlpack\tests\recurrent_network_test.cpp(879): last checkpoint: "LSTMDistractedSequenceRecallTest" entry.