FIX: minor refactoring of stack unwinding code (doesn't change behavior).
FIX: minor refactoring of stack unwinding code (doesn't change behavior).

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