MacBook-Pro:toys mcrepeau$ perl test_toy_module.pl 
Using a hash as a reference is deprecated at toy_module.pm line 11.
Using a hash as a reference is deprecated at toy_module.pm line 19.
********** INSIDE SUBROUTINE NEW **********
simple scalar: 5
Type of argument to keys on reference must be unblessed hashref or arrayref at toy_module.pm line 11.