Cite
 
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 one.

1. Common when the index should have started from 0 but instead started from 1.

2. A kind of off-by-one error. See also zeroth.