Heisenbug
Heisenbug is a term used in software programming to describe a computer bug that disappears or alters its characteristics when it is researched.A common example are bugs that occur in a release-mode compile of a program but do not occur when researched under debug-mode, or some bugs caused by a race condition. The name is a pun on the physics term "Heisenberg Uncertainty principle", which is popularly believed to refer to the way observers affect the observed in quantum mechanics.
- See also: Bohr bug, mandelbug, schroedinbug