failing tests on 32-bit due to alignment issue

[ExpandingMan]

Somehow an alignment error gets thrown on 32-bit systems, as has been seen on appveyor. The error was thrown on an array of Float64 so it seems to me that the only way this can happen is if the array was constructed misaligned.

I have very little ability to troubleshoot this, any help is welcome. A starting point might be painstakingly checking the writes to make sure that they only put things in aligned locations.