Hi MKL team,
If I am not mistaken this originated from an issue, https://github.com/scipy/scipy/issues/11709, we have on SciPy wrappers. In our codebase we wrapped ?heevr in a way such that when jobz parameter is not "V" we return an empty isuppz array after following the LAPACK reference contract. We also tested this in various platforms using OpenBLAS. After having confirmed test cases we merged into our codebase. But as above, a number of users immediately started getting hit by this behavior.
As far as I could dig in, this relates to how ?stemr interacts with isuppz array depending on the parameters supplied. However as demonstrated above isuppz is referenced regardless. Could you please advice us how we should proceed?
Yes, we investigated and root-caused the issue.
The fix of the issue is planning to be released the next update of mkl 2020 ( update 2). We will keep you informed of the status of this case.