Question
You encounter a bug that only appears intermittently and
is difficult to reproduce. What is this type of bug often called?Solution
A "Heisenbug" is a software bug that seems to disappear or alter its behavior when one attempts to probe or isolate it (e.g., by running it under a debugger). The act of observing it changes its behavior, much like the Heisenberg Uncertainty Principle in quantum mechanics.
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