Paul Price claims that DM-12207 fixed the need to copy refCats in jointcal to ensure memory contiguity. While attempting to test that claim, I ran into at least one exception related to DM-5855 that made it impossible to actually test that claim.

After DM-5855 is fixed, I should try removing those refCat.copy() statements again (just search for "contiguity" throughout jointcal for the 7 places to fix it) to see if it is safe or not.