class B feature {TEST} -- Tests c1: INTEGER_8 = 1 c2: INTEGER_8 = 2 e1 require is_empty: ("").is_empty external "C inline" alias "return" end e2 require is_empty: ("").is_empty external "C inline" alias "return" end f1 require is_empty: ("").is_empty do ensure instance_free: class end f2 require is_empty: ("").is_empty do ensure instance_free: class end end