FIX: stack unrolling multiple bugs. Fixes the EXIT/RETURN issues revealed by newly added function tests.
FIX: stack unrolling multiple bugs. Fixes the EXIT/RETURN issues revealed by newly added function tests.

rheber/red,vehar/red,iArnold/red,NikolayShubenkovProgSchool/red,iArnold/red,rheber/red,red-eco/red,red-eco/red,vehar/red,NikolayShubenkovProgSchool/red