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.
Spanish Empire
Race mixture ("mestizaje") was a fact of colonial society, with the three racial groups, European whites ("españoles"), Africans ("negros"), and Indians ("indios") producing mixed-race offspring, or castas. There was a pyramid of racial status with the apex being the small number of European white ("españoles"), a slightly larger number of mixed-race castas, who, like the whites were mainly urban dwelling, and the largest populations were Indians living in communities in the countryside. Although Indians were classified as part of the "Repúbica de Indios", their offspring of unions with "Españoles" and Africans were "castas". White-Indian mixtures were more socially acceptable in the Hispanic sphere, with the possibility over generations of mixed-race offspring being classified as Español. Any offspring with African ancestry could never remove the "stain" of their racial heritage, since Africans were seen as "natural slaves." Eighteenth-century paintings depicted the "sistema de castas" in hierarchical order, but there was some fluidity in the system rather than absolute rigidity. Men of color began to apply to the Royal and Pontifical University of Mexico, but in 1688 Bishop Juan de Palafox y Mendoza attempted to prevent their entrance by drafting new regulations barring blacks and mulattoes. In small Mexican parishes, dark complected priests served while their mixed-race heritage was left unacknowledged. In 1776, the crown attempted to prevent marriages between racially unequal partners by issuing the Royal Pragmatic on Marriage, taking approval of marriages away from the couple and placing it in their parents' hands. The marriage between Luisa de Abrego, a free black domestic servant from Seville and Miguel Rodríguez, a white Segovian conquistador in 1565 in St. Augustine (Spanish Florida), is the first known and recorded Christian marriage anywhere in the continental United States.