Serhiy Storchaka added the comment: About the 'invalid command name' message: PR 3622 was not yet merged on your machine.
Inserting hs.see(start) just before hs.bbox(start) fixes the issue. I have added some debug prints. Here are outputs, with and without a fix. ---------- Added file: https://bugs.python.org/file47142/failure.txt _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue31496> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com