opencv-python: segfault in docker when used with torch and matplotlib

Steps to reproduce

╰─$cat Dockerfile
FROM centos/python-36-centos7
USER root
WORKDIR /root
RUN yum update -y
RUN pip install --upgrade pip
RUN pip install opencv-python
RUN pip install -U matplotlib
RUN pip install torch==1.6.0+cpu -f https://download.pytorch.org/whl/torch_stable.html
COPY a.py /root/a.py
RUN python -X faulthandler a.py

╰─$cat a.py
import torch
try:
    import cv2
except:
    pass
import matplotlib.pyplot as plt

╰─$docker build   -t test:v0 .      

..................
Step 10/10 : RUN python -X faulthandler a.py
 ---> Running in 1b7bc36c9727
Fatal Python error: Segmentation fault

Thread 0x00007f185a430740 (most recent call first):
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/json/encoder.py", line 356 in _iterencode_dict
The command '/bin/sh -c python -X faulthandler a.py' returned a non-zero code: 139

It works if I use opencv-python-headless instead.

Issue submission checklist

• This is not a generic OpenCV usage question (looking for help for coding, other usage questions, homework etc.)