Forgetting to set the reference instance variable of the last node in a linked list to null will cause a logic error.

Name: Forgetting to set the reference instance variable of the last node in a linked list to null will cause a logic error.
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This is because if the reference instance variable of the last node in a linked list is not set to null, it will still point to the previous node in the list, and lead to an infinite loop or incorrect traversals.

Forgetting to Set the Reference Instance Variable of the Last