I merged the hpy-0.9 branch to py3.9. There are a few untranslated failures, and more extra_tests post-translation failures. Most of the extra_test failures are in the debug/trace/hpy_devel/importing tests which cannot really be checked untranslated. Help is welcome to try to debug if the failures are due to using pytest4.0, to something in the test harnesses, or whether there is an actual problem with the hpy backend implementation. Additionally, the branch crashes when importing NumPy from the hpy branch https://github.com/hpyproject/numpy-hpy. This is being tracked in issue https://github.com/hpyproject/numpy-hpy/issues/15. It seems the custom trace function necessary to keep the W_Root object associated with a HPyField is not being called. Again: help here is welcome. I can meet up on zoom or google meet if anyone would like to dive in and wants to talk about the problems. Matti