…reter may remove the '_State' class before running the 'atexit' event actions, which yields a stacktrace with a 'NoneType has no _transation attribute' error. Checking on the existence of the '_State' class, and then on its attributes ensures the NoneType error does not appear.
nick13jaremek
commented
7 years ago
…reter may remove the '_State' class before running the 'atexit' event actions, which yields a stacktrace with a 'NoneType has no _transation attribute' error. Checking on the existence of the '_State' class, and then on its attributes ensures the NoneType error does not appear.