use strict;
use warnings;
#only linux
#use diagnostics;

# - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - - - - -
sub in_function {
    my $file = shift;

    glob($file) or die ("$file file was not foundn"); #this fails second time called

    # this is ok second time called
    #my @dummy = glob($file) or die ("$file file was not foundn");
}
# - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - - - -
my $file = "/tmp/file1*.pdf";
glob($file) or die ("$file file was not foundn");
in_function($file);
$file = "/tmp/file2*.pdf";
glob($file) or die ("$file file was not foundn");
in_function($file);