gh-102988: Detect email address parsing errors and return empty tuple to indicate the parsing error (old API) by tdwyer · Pull Request #102990 · python/cpython (original) (raw)

Pull Request title

gh-102988: This PR is designed to detect parsing errors and return an empty tuple to indicate the parsing error. Additionally, this PR updates the test_email.py to check for these bugs, as well as, adds some other wacky Address Headers that are in the examples of RFC 2822 and makes sure they are being parsed correctly.

I realize that this PR dose not actually track down the bug and fix it. It simply detects the error has happened and returns a parsing error. However, Lib/email/utils.py is a much simple file than Lib/email/_parseaddr.py, so it is much easier to review this change. Additionally, there are actually multiple bugs which are causing erroneous output. Tracing the code flow for each and fixing them would be prone to error considering all of the wacky stuff that RFC 2822 allows for in Address headers. Finally, this change is actually rather simple.