Checking for stack Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack size 0, pop foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from bar, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo Invalid stack: push from baru, pop from foo