It appears to have been fixed between 5.12 and 5.14, though nothing is noted in perl5140delta.

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

In reply to Re^3: return of assigment in list context (bug!) by tobyink
in thread return of hash-assigment in list context (bug?) by LanX

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