Your first assignment to @ARGV is actually an I/O command (because it uses <>).
You have specified the file-handle for that I/O as a "wildcard directory", which evaluates to a null file handle.
Update: See Athanasius++ response below - I hade forgotten that <*> is a synonym for glob.
The I/O results in @ARGV being empty, and hanging waiting on STDIN at the next <> operator.
Try changing the first statement to :
@ARGV = glob "/cygdrive/c/Users/abc123/Documents/dude/logs/*.log";
And also, use strict and warnings!.
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