I'm not really sure what to do about it. I looked some and there are a variety of different types of segfaults triggered by numba on arm64. I wasn't able to find any particular patterns.
I have most of the patches they initially recommended but upstream has moved on to released 0.57.0 which supports python3.11, numpy 1.24, and llvm 14. Unfortunately it also wants llvmlite 0.40.0. There's quite a lot of differences from our patched 0.56.4 and their released 0.57.0. I was hoping to make a backports version of numba 0.57 when possible, though that also will take a backport of llvmlite. It'd probably be easier to get upstream to help with debugging 0.57 Diane