MatthewChristoff

@diamog Do you have any ideas about why this could be / what we should do from here?

UPDATE: The issue was found. Because CSR uses an `MTVs` to store its particle data and continually makes and destroys them, [these](https://github.com/SCOREC/pumi-pic/blob/1d5c1190685506529bf1d8d599008562435b9eb4/performance_tests/ps_combo160.cpp#L148-L150) `get` calls were leaving a few smart pointers...

Once CSR has its swapping implementation done, we could probably close this issue, although the issue is still technically there for cases in which CSR increases in size so that...