FIX: issue #157 (Missing test on system/stack gives Compilation error)
FIX: issue #157 (Missing test on system/stack gives Compilation error)

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