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  1. or download this
    #!/usr/bin/perl
$FOO="/etc/passwd";
open FOO || die "Argh: $!\n";
  2. or download this
    nooky:~$ ./foo.pl
Precedence problem: open FOO should be open(FOO) at ./foo.pl line 3.
  3. or download this
    nooky:~$ ./foo.pl
Precedence problem: open FOO should be open(FOO) at ./foo.pl line 3.
Probable precedence problem on logical or at ./foo.pl line 3.