Dangling Pointer: N. A Reference That Doesn't Actually Lead Anywhere (in C And Some Other Languages, A Pointer That Doesn't Actually Point At Anything Valid).

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:dangling pointer: n. A reference that doesn't actually lead
anywhere (in C and some other languages, a pointer that doesn't
actually point at anything valid). Usually this happens because it
formerly pointed to something that has moved or disappeared. Used
as jargon in a generalization of its techspeak meaning; for
example, a local phone number for a person who has since moved to
the other coast is a dangling pointer.
-- The AI Hackers Dictionary

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