You cannot pop the return value of ->get_files because it is not an array.

For an explanation of why this makes a difference, see the FAQ: 

perldoc -q "What is the difference between a list and an array"

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The Synopsis section of the documentation pop specifies that it requires an array.

Bill

In reply to Re^2: Popping from method that returns a list in one line by BillKSmith
in thread Popping from method that returns a list in one line by nysus

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