Beware, you can't bless just any old scalar value: it must be a reference you bless. Also, return is not really necessary unless you are returning from somewhere in the middle of the function's code.

Is your new() a class constructor method? If so, you should consider writing it as,

packsge CheckStuff;
sub new {
    my $class = shift;
    my $bar = 2;
    bless \$bar, $class;
}
[download]

to be called by, my $cs = CheckStuff->new(); That avoids the surprises you will get by having $bar a package global. You would find that with two CheckStuff objects around, their values would both be the same; whatever was set last. It also makes the constructor inheritable, so that if CheckStuff::Rigid has CheckStuff as a base class, my $csr = CheckStuff::Rigid->new(); always returns the right sort of object.

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