var=test_constant glob=SCALAR(0x176bd08)    ref=SCALAR refref=REF    deref: 23
var=test_sub      glob=-1                   ref=       refref=SCALAR deref: -
var=test_sub2     glob=*main::test_sub2     ref=       refref=GLOB   deref: -
var=test_variable glob=*main::test_variable ref=       refref=GLOB   deref: -