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# Scenario 1, example of the problem: 
my $is_file_exists = 1;
...
    print "The file doesn't exist\n";
    $is_file_exists = 0;
}

# Scenario 2, example of workaround that solves the problem: 
my $is_file_exists = 1;
...
    print "The file doesn't exist\n";
    $is_file_exists = 0;
}