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Here are two test cases to illustrate the problems. [good_and_bad.zip](https://github.com/QE-Lab/OpenQL/files/5253374/good_and_bad.zip) Both unitary matrices are 256x256, and very sparse (almost like identity). One will be decomposed successfully, but the other will...

First of all, `pip3 install plyvel` works perfectly on Ubuntu 20.04, say, on AMD CPU. When I install that on a Raspberry Pi 4B, running Ubuntu, the installation fail with...