[issue40944] email.message.EmailMessage address parser fails to handle 'example@'

Change by Roundup Robot : -- keywords: +patch nosy: +python-dev nosy_count: 3.0 -> 4.0 pull_requests: +19985 stage: -> patch review pull_request: https://github.com/python/cpython/pull/20790 ___ Python tracker _

[issue40944] email.message.EmailMessage address parser fails to handle 'example@'

New submission from Ivan Savin : How to reproduce: >>> import email.message >>> message = email.message.EmailMessage() >>> message['From'] = 'hey@' Traceback (most recent call last): File "/home/ivan/.pyenv/versions/3.9.0a5/lib/python3.9/email/_header_value_parser.py", line 1956, in get_add