The bug is triggered by input, not by print. The exact place is _PyUnicode_AsStringAndSize, where unicode check happens. Then print checks PyError_Occured and catches this error. Either this error should not be raised or should be cleared input finishes.

I'd love to provide a patch, but I have no idea, what should be corrected and how. If some would tutor me a little, I would be very happy to learn and code this.