I and other Monks aren't sure what is happening here. Let's get more info:
Add the line $|=1; at the top of your program. This will unbuffer STDOUT. Then put in some print statements as I suggested earlier. Then when the error happens, we will have an idea of what the program was doing. By default, STDOUT is buffered meaning that it only prints when its line buffer is full. STDERR is non-buffered by default meaning that it's error lines print right away. When you un-buffer STDOUT, the time sequence of the normal prints and error prints are preserved. The line right before the error will show what the program was doing right before the error occured.
Update: you said "There is more to my get_files sub that does a foreach (@array) and then checks the files for certain criteria.
I left out that section for clarity here." It could very well be that your simplification obscures the actual problem. Can you reproduce the problem with your simplified code?
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