one-banana problem = O = one-liner wars

one-line fix n.

Used (often sarcastically) of a change to a program that is thought to be trivial or insignificant right up to the moment it crashes the system. Usually `cured' by another one-line fix. See also I didn't change anything!

--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.