2014-04-26 10:52:28 -04:00
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heisenbug
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2014-04-26 11:54:15 -04:00
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/hi:zenbuhg/ , n. [from Heisenberg's Uncertainty Principle in quantum
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physics] A bug that disappears or alters its behavior when one attempts to
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probe or isolate it. (This usage is not even particularly fanciful; the use
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of a debugger sometimes alters a program's operating environment
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significantly enough that buggy code, such as that which relies on the
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values of uninitialized memory, behaves quite differently.) Antonym of Bohr
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bug ; see also mandelbug , schroedinbug. In C, nine out of ten heisenbugs
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result from uninitialized auto variables, fandango on core phenomena (esp.
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lossage related to corruption of the malloc arena ) or errors that smash the
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stack.
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