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Some "mysterious" bugs occur once, and then they either never occur or occur after months or years. You are not able to reproduce them because you don't know why they happen. Is there a technical name for such bugs?

CodeBlue
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1 Answers1

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This kind of bug is usually referred to as a Heisenbug.

Lucas
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    I think "Heisenbug" is specific to a "bug that seems to disappear or alter its behavior when one attempts to study it," to quote the Wikipedia article you linked to, which is subtly different than a bug that is simply rare or has no known reproduction steps. If a bug is simply hard to reproduce, I like "intermittent" as suggested by @yuriy-galanter. – hoffmanj Jul 24 '14 at 23:24