while構文の想定外の動き（条件にあってなくてもとまらない)

function spawnGunnerMob(loc: location) :: entity:
    spawn zombie at {_loc}
    set {_entity} to last spawned entity
    while {_entity} is alive:
        if {_entity} is not alive:
            broadcast "test"
            exit 1 sections

function spawnGunnerMob(loc: location) :: entity:
    spawn zombie at {_loc}
    set {_entity} to last spawned entity
    while {_entity} is alive:
        if {_entity} is not alive:
            broadcast "test"
            exit 1 sections