obi-wan error: /oh'bee-won` er'*r/ n. [RPI, from `off-by-one'
and the Obi-Wan Kenobi character in "Star Wars"] A loop of some sort
in which the index is off by 1. Common when the index should have
started from 0 but instead started from 1. A kind of off-by-one
error. See also zeroth.