[3.11] gh-98458: unittest: bugfix for infinite loop while handling chained exceptions that contain cycles (GH-98459)#99995
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…ined exceptions that contain cycles (pythonGH-98459) * Bugfix addressing infinite loop while handling self-referencing chained exception in TestResult._clean_tracebacks() * Bugfix extended to properly handle exception cycles in _clean_tracebacks. The "seen" set follows the approach used in the TracebackException class (thank you @iritkatriel for pointing it out) * adds a test for a single chained exception that holds a self-loop in its __cause__ and __context__ attributes (cherry picked from commit 72ec518) Co-authored-by: AlexTate <0xalextate@gmail.com>
This was referenced Dec 4, 2022
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(cherry picked from commit 72ec518)
Co-authored-by: AlexTate 0xalextate@gmail.com