At a guess, the stuff which is done in the place of the #Do some stuff comment uses $2.

perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'

In reply to Re^2: Pattern match not working sometimes by tobyink
in thread Pattern match not working sometimes by dantheman1210

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