mamba: mamba segfault when uninstalling package installed with older mamba version

@consideratio reported the following issue:

I’ve created a reproducible snippet. I’m going to try seeing if I can reproduce it also if starting out with mamba 0.20 from the start and not just updating to it along the way.

# 166a330 is a tag from 2022 jan 19 where a lot of packages were installed with
# mamba 0.17
FROM pangeo/pangeo-notebook:166a330

RUN echo "WILL FAIL: Attempting to remove nomkl with mamba version: $(mamba --version)" \
 && mamba uninstall -n ${CONDA_ENV} -vv -y nomkl || true

RUN mamba --version \
 && mamba update -y mamba \
 && mamba --version

RUN echo "WILL FAIL: Attempting to remove nomkl with mamba version: $(mamba --version)" \
 && mamba uninstall -n ${CONDA_ENV} -vv -y nomkl || true

RUN echo "WILL SUCCEED: Attempting to remove nomkl with mamba version: $(mamba --version)" \
 && echo "BY clearing the history file..." \
 && rm /srv/conda/envs/${CONDA_ENV}/conda-meta/history \
 && mamba uninstall -n ${CONDA_ENV} -vv -y nomkl

And

I’ve now reproduced this when mamba is installed to 0.20 from the beginning and not upgraded to before trying the mamba uninstall -n ${CONDA_ENV} nomkl command which is failing.

@wolfv let me know if you have ideas on how I could contribute with additional information etc.