libOTe-rs segfault with SSE and no AVX

[robinhundt]

When using the EACode and ExConvCodes of libOTe with SSE and optimizations enabled and AVX disabled, performing OTs with ZappOT results in segfaults. I tried to debug the segfaults, but couldn't find the underlying issue.
The problem does not arise when compiling

• with no optimizations
• or with AVX enabled.

A good first step would be a libOTe only repro, to make sure that the issue is not on our side.