http://www.perlmonks.org?node_id=1023326


in reply to Basic debugging checklist

Not sure if your perl version is too old?

Use Perl::MinimumVersion/perlver

$ perlver foo.pl -------------------------------------- | file | explicit | syntax | external | | -------------------------------------- | | foo.pl | ~ | v5.10.0 | n/a | | -------------------------------------- | | Minimum explicit version : ~ | | Minimum syntax version : v5.10.0 | | Minimum version of perl : v5.10.0 | -------------------------------------- $ perlver --blame foo.pl ------------------------------------------------------------ File : foo.pl Line : 3 Char : 17 Rule : _perl_5010_operators Version : 5.010 ------------------------------------------------------------ ~~ ------------------------------------------------------------ $ cat foo.pl my $foo = 6; my @bar = ( 3,6, 9 ); print 1 if $foo ~~ @bar;

Then you can add use v5.10.0; or <c> use 5.01000; to your foo.pl, and perl will do the version check