https://bugzilla.redhat.com/show_bug.cgi?id=1709037
--- Comment #12 from Raphael Groner projects.rg@smart.ms --- The python warning seems to have been a bug in the build environment.
% grep Warn build.log /usr/lib64/python3.7/site-packages/Cython/Compiler/Main.py:367: FutureWarning: Cython directive 'language_level' not set, using 2 for now (Py2). This will change in a later release! File: /home/builder/rpmbuild/BUILD/python-javabridge-16d6c91c3aa9dbf8c80de1fc442aca696a6197fa/_javabridge_mac.pxd /usr/lib64/python3.7/site-packages/Cython/Compiler/Main.py:367: FutureWarning: Cython directive 'language_level' not set, using 2 for now (Py2). This will change in a later release! File: /home/builder/rpmbuild/BUILD/python-javabridge-16d6c91c3aa9dbf8c80de1fc442aca696a6197fa/_javabridge_nomac.pxd Übereinstimmungen in Binärdatei build.log
https://koji.fedoraproject.org/koji/taskinfo?taskID=39019569