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What (who) is heisenbug - definition

SOFTWARE BUG THAT SEEMS TO DISAPPEAR OR ALTER ITS BEHAVIOR WHEN ONE ATTEMPTS TO STUDY IT

Heisenbug (bug); Bohr bug; Mandelbug; Schroedinbug; Schrödinbug; Heisenberg bug; Unusual software bugs; Hindenbug; Bohrbug; Fermat bug; Phase of the moon bug; Ghosts in the code; Schrodinbug; Heisenbugs; Enderbug; Alpha particle bug; Unusual software bug; Schrödingbug; Schrodingbug; Higgs-bugson

heisenbug

<jargon> /hi:'zen-buhg/ (From Heisenberg's Uncertainty Principle in quantum physics) A bug that disappears or alters its behaviour when one attempts to probe or isolate it. (This usage is not even particularly fanciful; the use of a debugger sometimes alters a program's operating environment significantly enough that buggy code, such as that which relies on the values of uninitialised memory, behaves quite differently.) In C, nine out of ten heisenbugs result from uninitialised auto variables, fandango on core phenomena (especially lossage related to corruption of the malloc arena) or errors that smash the stack. Opposite: Bohr bug. See also mandelbug, schroedinbug. [Jargon File] (1995-02-28)

Heisenbug

In computer programming jargon, a heisenbug is a software bug that seems to disappear or alter its behavior when one attempts to study it. The term is a pun on the name of Werner Heisenberg, the physicist who first asserted the observer effect of quantum mechanics, which states that the act of observing a system inevitably alters its state.

https://en.wikipedia.org/wiki/Heisenbug

Bohr bug

<jargon, programming> /bohr buhg/ (From Quantum physics) A repeatable bug; one that manifests reliably under a possibly unknown but well-defined set of conditions. Compare heisenbug. See also mandelbug, schroedinbug. [Jargon File] (1995-02-28)

Wikipedia

Heisenbug

In computer programming jargon, a heisenbug is a software bug that seems to disappear or alter its behavior when one attempts to study it. The term is a pun on the name of Werner Heisenberg, the physicist who first asserted the observer effect of quantum mechanics, which states that the act of observing a system inevitably alters its state. In electronics, the traditional term is probe effect, where attaching a test probe to a device changes its behavior.

Similar terms, such as bohrbug, mandelbug, hindenbug, and schrödinbug (see the section on related terms) have been occasionally proposed for other kinds of unusual software bugs, sometimes in jest.

https://en.wikipedia.org/wiki/Heisenbug