ValueError: assignment destination is read-only in de.test.wald with small examples

[MatthiasLienhard]

When running the example for differential testing from
diffxpy_tutorials/test/introduction_differential_testing.ipynb
as it is, with 100 genes, de.test.wald raises a ValueError: assignment destination is read-only.
When increasing the number of genes to 200, this error goes away.

[MatthiasLienhard]

Apparently, the number of genes has to be above 128 for the example to run.

I am using

• python 3.9.7
• numpy 1.20.3
• diffxpy v0.7.4+21.g12f1286