> Antoine, your msg129093 patch of test_zlib.py does it (with and
> without fprintf(3)s).  CRC ok etc., it just works.

Indeed, and it also seems to work on the buildbot. I will commit the
patch soon. Thanks for your help!

> (Seems mmap(2) has a problem here, i would say; the mentioned bug
> report is from 2003, so the golden sunset watchers may need some more
> additional time, if you allow me that comment.)