Yes, I had heard the term "space leak" used in functional language communities but wasn't sure what it meant. Asking around, the definition is commonly given as

Yes, I had heard the term "space leak" used in functional language communities but wasn't sure what it meant. Asking around, the definition is commonly given as I did above. I thought readers here might find that information useful, given that someone might describe a problem similar to the OP's by using the term "space leak".