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#!bin/perl
use strict;
use warnings;
...
                };

closedir DIR;

Use of uninitialized value $to in -d at /usr/share/perl/5.22/File/Copy
+.pm line 256.
Use of uninitialized value $to in stat at /usr/share/perl/5.22/File/Co
+py.pm line 260.
Use of uninitialized value $to in rename at /usr/share/perl/5.22/File/
+Copy.pm line 281.
...
Use of uninitialized value $to in stat at /usr/share/perl/5.22/File/Co
+py.pm line 104.
Use of uninitialized value $to in open at /usr/share/perl/5.22/File/Co
+py.pm line 167.
Use of uninitialized value $to in unlink at /usr/share/perl/5.22/File/
+Copy.pm line 30