Race condition
A race condition or race hazard is the behavior of an electronics, software, or other system where the system's substantive behavior is dependent on the sequence or timing of other uncontrollable events. It becomes a bug when one or more of the possible behaviors is undesirable.
Maiden race
In horse racing a maiden race is an event for horses that have not won a race. Horses that have not won a race are referred to as maidens. Maiden horse races are held over a variety of distances and under conditions with eligibility based on the sex or age of the horse. Races may be handicaps, set weights, or weight for age. In many countries, maiden races are the lowest level of class and represent an entry point into a racing career. In countries such as the United States, maiden special weight races rank above claiming races, while maiden claiming races allow the horse to be claimed (bought) by another owner.