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Heisenbug - Dictionary Definition and Overview |
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Heisenbug :
/hi:'zen-buhg/ (Based on 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)
Based on the Online Dictionary of Computing [Computer_Dictionary]:
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Heisenbug : /hi:'zen-buhg/ n. [from Heisenberg's Uncertainty Principle in
quantum physics] A bug that disappears or alters its behavior 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 uninitialized memory, behaves quite
differently.) Antonym of Bohr bug; see also mandelbug,
schroedinbug. In C, nine out of ten heisenbugs result from
uninitialized auto variables, fandango on core phenomena (esp. lossage
related to corruption of the malloc arena) or errors that smash the
stack.
Based on the Online Dictionary of Computing [Computer_Dictionary]:
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