[issue41655] New Node may not be visited in lib2to3.refactor.RefactoringTool.traverse_by

[Chrome]

Chrome <expo.tao at gmail.com> added the comment:

you can run example.py to reproduce this bug.

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Added file: https://bugs.python.org/file49434/example.py

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<https://bugs.python.org/issue41655>
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